EP1658329A1

EP1658329A1 - Powdered or granular composition based on leguminous starch and use thereof in non-food and non-pharmaceutical applications

Info

Publication number: EP1658329A1
Application number: EP04786289A
Authority: EP
Inventors: Léon Mentink; Joel Bernaerts; Jean-Pierre Graux
Original assignee: Roquette Freres SA
Current assignee: Roquette Freres SA
Priority date: 2003-08-26
Filing date: 2004-08-10
Publication date: 2006-05-24
Also published as: CA2536063A1; CA2536063C; WO2005021636A1; MXPA06002221A; FR2859213A1; CN1842567B; FR2859213B1; CN1842567A; US7781578B2; US20060229207A1; JP2007503500A

Abstract

The invention concerns a powdered or granular composition, useful for preparing non-food and non-pharmaceutical products. The invention is characterized in that it contains at least one leguminous starch, and at least one additive selected among a flowing agent, a filling agent, a polymer, an active principle or a mixture thereof. The invention also concerns the use of such a composition for non-food and non-pharmaceutical purposes.

Description

The present invention relates to a new pulverulent or granulated composition based on legume starch, particularly suitable for the preparation of products. for non-food and non-pharmaceutical use such as for example detergents, adhesives, absorbent powders, phytosanitary powders, building materials, plastics or textiles ... It also relates to the use of a legume starch for the purpose of preparing such products according to a process comprising at least one step of physical mixing or granulation. Finally, the invention relates to the use of legume starch with a view to providing a new multifunctional composition, for example useful as absorbent, disintegrant, binder, adhesive, odor trap and / or active ingredient carrier, useful for the preparation of such products. By "powder ^composition" or granulated "within the meaning of the present invention, in particular means any composition, intermediate or final, they are in particular the origin, nature, the components, the one or more feature (s ) and destination (s) in the form of particles or granules of any particle size, generally flowing freely and obtained according to a process containing at least one step of physical mixing or at least one step of granulation, in particular by wet process, said step that could have been preceded or followed by at least one chosen step especially in the group comprising hydration, drying, compacting, pelletizing, densification, grinding, sieving, spheronization, coating, film-coating and sugar-coating treatments. By “wet granulation” is meant any known granulation technique carried out in the presence of water, water vapor and / or any other liquid, liquefied or molten phase. These techniques conventionally involve a step of physical mixing of the various constituents of the composition to be granulated, carried out at moderate temperature, ie generally between 15 and 40 ° C., and in particular at ambient temperature, and at low pressure, generally at atmospheric pressure. They can in particular be operated on devices of the mixer, granulator, mixer-granulator, spheronizer, granulator-spheronizer, fluidized bed or drum granulator, granulator-coater type, such as those marketed by the Companies.

GLATT, LODIGE, LIST, HOSOKAWA, SHUGI, NARA MACHINERY, FRE ITT, FORBERG, KALTENBACH-THURING, APV or ROMACO. These techniques generally allow to obtain products having an average particle diameter greater than 100 microns and often above 200 microns, for measurement on laser diffraction granulometer, e.g. LS230 type BECKMAN COULTER ^® 'being dried. By “legume” within the meaning of the present invention, is understood any plant belonging to the families of the césalpiniaceae, mimosaceae or papilionaceous and in particular any plant belonging to the family of papilionaceous like, for example, peas, beans, beans, feverole, lentils, alfalfa, clover or lupine. This definition includes, in particular, all the plants described in any of the tables contained in the article by HOOVER et al. entitled "Composition, Structure, functionality and Chemical modification of vegetable starches: a review". Preferably, the legume is chosen from the group comprising peas, beans, beans and feverole. Advantageously, it is pea, the term "pea" being considered here in its broadest sense and including in particular: all varieties of ^wild of "smooth pea" ( "smooth pea"), and all the mutant varieties of peas, whatever the uses for which these varieties are generally intended (human food, animal nutrition and / or other uses). Said mutant varieties are in particular those called “rug 4 mutants” and “rug 5 mutants” as described in the article by CL HEDLEY et al. entitled "Developing novel pea starches" Proceedings of the Symposium of the Industrial Biochemistry and Biotechnology Group of the Biochemical Society, 1996, pp 77-87. According to another advantageous variant, the legume is a plant, for example a variety of peas or feverole, giving seeds containing at least 25% by weight (dry / dry) of starch. By “legume starch” is meant any composition extracted, in any way whatsoever, from a legume and in particular from a papilionacea, and the starch content of which is greater than 90%, preferably greater than 95%, these percentages being expressed in dry weight relative to the dry weight of the composition that constitutes said legume starch. Advantageously, this starch content is at least equal to 98% (dry / dry). The protein content of said legume starch is less than 5%, preferably less than 2%, these percentages also being expressed in dry weight relative to the dry weight of the composition that constitutes said legume starch. Advantageously, this protein content is at most equal to 1% (dry / dry), preferably at most equal to 0.5%. It can, for example, be between 0.25 and 0.45%. "Legume starch" within the meaning of the present invention may also contain, generally at a total content of less than 5% (dry / dry), various other constituents than starch and proteins, in particular fat, colloidal substances, fibers, mineral elements, etc. The amylose content of the starch contained in said composition is in a wide range, ie greater than 20% and less than 60%, these percentages being expressed by dry weight relative to the dry weight of starch contained in said composition. According to a first variant, this amylose content is between 22 and 55% (dry / dry). It can advantageously be between 33 and 45% dry / dry. Mixtures of additives in particulate form are commonly used for the preparation finished products, liquid or solid, for non-food or non-pharmaceutical use. ... Each of these additives can. _. present a single functionality, to say the least, or a plurality of functionalities with regard to the conditions of preparation, the conditions of use and the desired properties of the finished product. By way of illustration, it has been proposed to prepare, according to a process which may or may not include a granulation step, in particular by the wet method, particulate additives for detergent compositions, the functionality of which, as a priority, was to act: as a builder or co- builder based on zeolites as described, for example, in patents EP 455,522 and EP 511,018 in the name of the Applicant, as a disintegrating agent as described, for example, in patents WO 98/40462, WO 99 / 64555, CA 2 317 030 or DE 199 530 27, - as a support agent for surfactants or defoamers as described, for example, in patents EP 496 510, CA 2 300 638, CA 2 316 591 or WO 01/34756, as a bleach activator support agent as described for example in US Patents 4,372,868, US 4,695,397 and US 5,433,881, as a perfume support agent as described , for example, in patent WO 99/45091. In all cases, it is desired that the particulate additive, obtained or not by wet granulation, generally present simultaneously: a) good flowability for storage, transport, dosing and possible mixing leading to final product, b) a particle size sufficiently high to be suitable for said operations and further limit the risks of _explosibility_ or of inhalation _of dust, c) good resistance to abrasion during said operations and in particular a low propensity to generate fines particles and this, for safety and productivity reasons, d) a density adapted to said operations and if possible to new constraints linked to environmental protection aimed at densification of finished products in order to limit the volume of packaging and the cost of transport, e) an ability to be dispersed and / or dissolved homogeneously and, if possible, controlled in the finished product and then in the application medium, including 1) in water or an adhesive whose temperature is low or 2) on the surface of a soil or plant, f) a good compressibility in the case where said additive is incorporated, mixed or n it is with other particulate additives, in a final composition to be compacted or compressed, g) a good ability to act as a vector agent, in particular with absorbent, dispersing and / or protective properties, of any active principle which it contains, h ) very good biodegradability, in particular with regard to ever more restrictive regulations related to environmental protection, i) high whiteness as desired, for example, by the manufacturers of detergent compositions or of alkaline adhesives and, upstream, by their additive suppliers, all of these manufacturers generally seeking a high degree of whiteness for these finished or semi-finished products, and, j) the lowest possible cost price. In addition, in the case of finished products for non-food or non-pharmaceutical use such as detergents, adhesives, absorbent powders for printing, compositions for building materials, compositions for plastics or textiles, phytosanitary products or fertilizer, it is often desired that the additives used for the preparation of said finished products as well as said finished products, be effectively usable under alkaline conditions and in particular in application media whose pH is between 7 and 13 approximately and very particularly between pH 8 and 11 approximately. In some cases, it is inversely required that this efficiency can be expressed in a (very) low pH range. This is for example the case for anti-scale tablets having a pH of 1 to 5 as described in patent WO 01/62886. It follows that the components of said additives, whatever their nature and functionality (s), must also be adapted to such pH conditions and in particular allow the additive and the finished product containing it to have or maintain the characteristics sought for efficiency, abrasion resistance and hardness, solubility and dispersibility in water, biodegradability, color, etc. It is known that the alkaline products contained in detergent compositions have the effect in particular to increase the color, the degradation and the sensitivity to hydrolysis of active ingredients such as perfumes or bleach activators but also carriers of these active ingredients, such as starches for example. This is why it has been advocated in US Pat. No. 4,695,397, to prepare particles of detergency additive in the absence of water or of liquid phase and._çe, by simple compaction then grinding of a physical mixture associating the bleaching activator, corn starch and sodium tripolyphosphate. It is also known that the pH conditions have a very large influence on the properties, for example of swelling, solubility, gelling, dispersibility and reactivity in water, of polymeric products of natural or synthetic origin conventionally used in the preparation of compositions for non-food and non-pharmaceutical use. Granular starches are very particularly sensitive to alkaline pHs which significantly increase its solubility, viscosity and color, especially in an aqueous medium. Under these conditions, the starches generally cannot swell on contact with water without developing a strong tackiness. This tackiness is particularly unfavorable when a starch is used in systems which have, for example, to favor in an aqueous medium the dispersion of active principles and / or the disintegration of tablets into tablets. In addition, the significant presence of reducing sugars in many starch derivatives is likely, in an alkaline medium, to generate coloring problems in any composition containing such derivatives. Conversely, under acidic pH conditions, starches easily undergo a hydrolysis phenomenon generating reducing sugars and small molecules and which has the effect of increasing hygroscopicity and decrease the binding power of the resulting starchy composition. These drawbacks ... specified, L.iés .à. the use of starches and derivatives in media having alkaline pHs or conversely acidic pHs, lead the skilled person to rule out or limit in practice the use of starches in favor of celluloses and / or synthetic polymers, however higher cost prices and less biodegradability. Furthermore, during the manufacture of powders or granules for non-food and non-pharmaceutical use, it is preferable to retain, if possible, carriers and vector agents, presenting only very limited risks of explosion. These starches, like any finely divided powdery organic substance, are reputed to present risks of this nature, but under special conditions of containment. As a result, formulators sometimes tend to exclude the use of starches to prefer mineral substances such as silica, talc and calcium carbonate, although the performance and functionality of these products may be completely different , even mediocre and therefore oblige to correct these defects by the use of other generally expensive and non-biodegradable substances. It follows from the above that there was a need to have a means which makes it possible to be advantageously usable in the general context of the preparation of non-food and non-pharmaceutical products and in particular of a means which: 1) presents the maximum of the characteristics a) to j) above and in particular of the physical characteristics, a biodegradability and a cost price adapted to current technical, economic and regulatory requirements, 2) can be used easily, without requiring costly installations, due to the risk of explosion that it could generate during handling, 3) can be used for the maximum number of functions sought in the field of manufacturing intermediate or finished products, solid or liquid, for non-food or non-pharmaceutical use, as such as a finished product, for example, in the form of separating powders of paper or adhesive powder or detergent granules or phytosanitary, 4) either usable for the maximum number of active principles used in this field, and in particular, 5) is effective in media which may have pH values far from neutral, in particular (very) alkaline pHs. And the Applicant Company has found that such a means could consist of a composition selected by in particular 1) its form of presentation, in this case pulverulent or granulated, and preferably in the case of a granulation, a form granulated by wet 2) and its nature, by the compulsory presence of a legume starch and an additive selected as a function of non-food and non-pharmaceutical use, which is intended for the composition. More specifically, the subject of the invention is a pulverulent or granulated composition, useful for the preparation of products for non-food and non-pharmaceutical use, characterized in that it contains: at least one legume starch, having a) a starch content greater than 90%, b) a protein content less than 5% and c) an amylose content greater than 20% and less than 60%, these percentages being expressed by dry weight relative to the total dry weight of said legume starch, - and at least one additive chosen from a flow agent, a bulking agent, a polymer, an active ingredient or a mixture thereof. Preferably: a) the starch content is greater than 95% (dry / dry), b) the protein content is less than 2% (dry / dry) and, c) the amylose content is between 22 and 55 % (dry / dry). Very advantageously, the legume starch is a pea starch having: a) a starch content greater than 98% (dry / dry), b) a protein content less than 1% dry / dry, and c) an amylose content of between 33 and 45% dry / dry. According to a first variant, the starches of legumes are native starches, of granular structure, of natural or hybrid origin, including those resulting from mutations or genetic manipulations. They can in particular be derived from beans, broad beans, feverole, lentils, peas, including all of their respective varieties. According to another variant, legume starches are products resulting from a chemical treatment, an enzymatic treatment, and / or a physical treatment, in particular thermal treatment, of a native starch, said treatment having the effect of whether or not to retain the granular structure of the starting starch. This definition notably includes starches of granular or non-granular structure, crosslinked, esterified, etherified, oxidized, fluidized, pregelatinized, retrograde, resistant to enzymes, compacted and their mixtures. These products usually have an equivalent dextrose (ED) of less than 0.5. By “granular (structural) starch” is meant any starch, native or modified, the majority of the grains of which, ie at least 50% by number and up to 100% by number, exhibit birefringence during microscopic observation. under polarized light. According to a first advantageous mode, the legume starch is a granular starch, native or modified, preferably pea. It may in particular be a native granular starch, that is to say unmodified by chemical, enzymatic or physical means, in particular a native granular pea starch. It may also be a granular starch, preferably pea, modified by chemical, enzymatic and / or physical means, for example by acid, enzymatic or oxidizing fluidification, by dextrinification, by esterification, by etherification in particular by cationization, carboxyalkylation, ethoxylation or hydroxypropylation, by crosslinking, by microwave or ultrasound treatment, by atomization, by extrusion, by cooking, by heating in particular according to the operations known as “heat moisture treatment” or “annealing”. According to a second advantageous mode, the legume starch, preferably the pea, is a starch which is retrograded and / or resistant to enzymes, in particular resistant to α-amylases, isoamylases or glucoamylases. According to a third advantageous mode, the legume starch, preferably the pea, is a pregelatinized starch, in particular obtained by carrying out a cooking-extrusion or a treatment on drying drums, so as to confer on the starch a certain solubility in cold water unlike granular starches. The additive present in the composition according to the invention is there in a content of between 1 and 9000 parts, preferably between 3 and 6000 parts, more preferably between 10 and 4000 parts, for 10 000 parts of legume starch ( dry / dry). It is chosen from flow agents, bulking agents, polymers, active ingredients, alone or as a mixture between them. The additive can be a flow agent. It is then preferably present at a content of between 1 and 200 parts per 10,000 parts (dry / dry) of legume starch, and is preferably chosen from silicas, oxides of silicon or aluminum, phosphates of calcium, calcium silicates, aluminosilicates, diatomaceous earth, talcs, and kaolins. The additive can also be a filler, preferably present in a content of between 50 and 9000 parts and more preferably between 100 and 6000 parts per 10,000 parts (dry / dry) of legume starch. It is advantageously chosen from mineral fillers such as carbonates, phosphates, sulfates, silicates of alkali metals and alkaline- earthy, kaolins, micas, calcites, chalks, bentonites, clays, zeolites, talcs, alumina, metal oxides ... in particular zinc, titanium or silicon, blacks of coal, mineral fibers and among organic fillers such as the salts of organic acids of alkali and alkaline earth metals, wood powders, powders of cellulosic materials, vegetable fibers. Advantageously, the filler used has a solubility in water of less than 5%, preferably 2% and more preferably is insoluble in water. The additive can also be a polymer, preferably present between 10 and 6000 parts, more preferably between 100 and 4000 parts per 10 000 parts (dry / dry) of legume starch. It is preferably chosen from polymers of synthetic origin such as polyvinyl alcohols, polyvinylpyrrolidones, (co) -polymers of (meth) acrylic acid and their salts, polyethylene glycols, preferably biodegradable polyesters such as polylactates, polycaprolactones, polyesters of di (or poly) acids and di (poly) alcohols and polymers of natural or fermentative origin such as xanthans, polyhydroxyalkanoates (PHA), starches, algae extracts, celluloses , proteins and their respective derivatives. The additive can finally be an active principle, preferably present between 1 and 9000 parts and more preferably between 10 and 6000 parts per 10 000 parts (dry / dry) of legume starch. It is advantageously chosen from surfactants such as wetting agents, defoamers, emulsifiers, detergents, boiling agents, lubricants and anti-adhesives, builders and co-builders such as zeolites and polyacrylates, anti-redeposition agents, anti-oxidizing agents, anti-color transfer agents, alkaline agents, oxidizing agents, dyes, pigments, bleach activators, softeners, anticorrosion agents, biocidal agents, pesticides, enzymes, bio-activating agents, phytosanitary and veterinary active ingredients, vitamins, nutrients for animals or plants, fertilizers, plasticizers such as urea, glycols, salts of organic acids, sugar alcohols such as sorbitol, tackifiers and adhesives, perfumes, flame retardants, and any mixtures of at least two any of these products. The present invention also relates to the use of a legume starch as defined elsewhere for the preparation of a pulverulent or granulated composition for non-food and non-pharmaceutical use, said composition containing or being intended to contain at least one chosen additive. from a flow agent, a bulking agent, a polymer, an active ingredient or a mixture thereof. Said use of legume starch or of the composition according to the invention containing said legume starch can in particular be envisaged in the manufacture of detergent, phytosanitary or absorbent powders, adhesives, construction materials, plastics or textiles , in particular and as will be exemplified elsewhere, as an antifoam support, a disintegrating agent for tablets, an anti-caking agent for off-set printing and adhesive agent for plasterboard. The present invention a _. in particular for subject the use, in general, of a legume starch for the preparation of an anti-caking agent for off-set printing. Other characteristics and advantages of the description will appear clearly on reading the examples which follow, given by way of indication and without limitation.

EXAMPLE 1: ANTIMOUSSE SUPPORT 1. Formulation

Support (native pea starch) 10,000 parts

HS DB 100 silicone oil 1.467 parts

POLYSORB ^® 70/12/12 (binding agent) 1,075 parts

Granulation water 3,472 parts

Pea starch has a starch content greater than 98% (dry / dry), said starch having an amylose content of 35% (dry / dry pea starch) and a protein content of approximately 0.35% ( dry / dry pea starch). The silicone oil is marketed by Dow under the designation HS DB 100. The product POLYSORB 70/12/12 ^® is a hydrogenated starch hydrolyzate commercialized by the Applicant having an MS of about 70%. 2. Material Granulation: KENWOOD household mixer or equivalent fitted with a planetary movement, ERWEKA wet granulator type FGS fitted with a 2500 μm grid, and AEROMATIC fluidized dryer.

Procedure: introduce the starchy support and the binding agent into the KENWOOD mixer. With stirring, successively incorporate the anti-foam then the water. After homogenization, pass the mixture obtained over the ERWEKA wet granulator. Dry on the fluidized bed drier at 40 - 50 ° C to obtain a final humidity close to 7%. Sieve and retain the particle size fraction between 315 and 2500 μm.

3.Results The tests were carried out in comparison with corn and wheat starch.

4. Measurement of the abrasion Material: subject the particles to be tested to a mechanical action in a device called a friabilimeter (device of the ERWEKA TA brand) whose cylinder "ABRASION DRUM" rotates at a rotation speed of 25 rpm and in which was introduced 1 steel ball with a diameter of about 17mm and a weight of about 19g.

Procedure: introduce a quantity of 15 g of product with a particle size between 315 and 2500 μm into the abrasion cylinder of this friabilimeter. Then rotate the device for 5 minutes.

Results: at the end of the experiment, determine the proportion by weight represented by the residue retained on a sieve with a mesh width of 315 microns. The abrasion index corresponds to the percentage of powder not retained by the previously defined sieve. The abrasion is all the greater the higher the percentage of powder not retained by the above sieve.

5. Measurement of the anti-foam effect

Equipment: a 2 liter tall glass beaker is used, placed in a thermostatically controlled bath at 40 ° C. The beaker is filled with 1 liter of drinking water at 40 ° TH and 40 ° C supplemented with 4 g of detergent. The stirring is carried out by means of a stirrer with 4 blades (rotation: 1000 RPM) fixed so that its lower end is 35 mm from the bottom of the beaker.

Procedure: in the 2-liter beaker, put 1 liter of drinking water at 40 ° TH / 40 ° C and 4 g of an anti-foaming detergent powder to which 2% of the anti-foaming preparation to be evaluated is added. compared to the detergent powder, stir at 1000 RPM for 25 min. Stop the agitation every 5 min and raise the height of the supernatant foam.

Results (determination of the% foam remaining): the percentage of foam remaining is determined by calculating the average of the foam heights resulting from 5 repeated measurements and by calculating the percentage of foam remaining in relation to the height of foam formed with a control test without defoaming.

EXAMPLE 2; DISINTEGRATING AGENT / DETERGENT TABLETS

1.Compositions of formulations

Pea starch (permeabilizing agent) 10,000 parts GLYCOLYS ^® D (binding agent) 1,364 parts ACUSOL ^® 772 (swelling agent) 2,278 parts Granulation water 13,642 parts GLYCOLYS ^® D marketed by the Applicant. ACUSOL ^® 772 marketed by Rohm Haas. 2. Making the granules Material: KENWOOD household mixer or equivalent provided with a planetary movement, ERWEKA wet granulator type FGS fitted with a 1500 μm grid and AEROMATIC fluidized dryer.

Procedure: dry mix the permeabilizing agent, the binding agent and the swelling agent in the KENWOOD mixer. While stirring, add the water. After homogenization, pass the mixture obtained over the ERWEKA wet granulator fitted with a 1500 μm grid. Dry on the fluidized bed drier at 40 - 50 ° C to obtain a final humidity of about 10%. Sieve to obtain the desired particle size fraction.

Making the tablets Homogeneously mix a standard detergent powder and the granulated disintegrating agent to be tested. Put 40 g of the previous mixture in a cylindrical tube 4 cm inside diameter and 10 cm high with a removable bottom to extract the tablet after compression. Place a sliding piston in the tube to allow the mixture to be compressed. Position the previous system in a PERRIER press and apply the desired pressure. For example, with a compact powder prepared in the laboratory, the force required to apply is 2.5 kN, and with a commercial Skip micro powder, the force to be applied is only 1 kN.

4. Results The pea starch having the composition mentioned in Example 1 is compared with starches native corn and wheat marketed by the Applicant.

The explosibility characteristics of the native pea starches used for the preparation of the granular disintegrating agents according to the invention, as well as those of the native wheat and corn starches used for comparison, are given in the table below. after. These values were obtained using the standard methods in force.

Measuring the speed of disintegration of the shelves Principle: to carry out this test, the shelf to be tested is placed in the water inlet tank of a Bosch washing machine with laundry loaded from above. The machine is powered by a pump connected to a tank ^'water. As a result, the amount of water can possibly be changed and the water inlet pressure in the washing machine is constant.

Result: the disintegration speed in seconds is measured from the moment the water supply begins until the tablet has completely disintegrated.

EXAMPLE ANTI-MASKING AGENT FOR PRINTING

OFFSET

1. Formulation Mixtures (native and granular starch - flow agent) were produced by using a mixer of robot-cut type (mixing time of 30 seconds).

Different flow agents were used: • AEROSIL ^® RL972 precipitated amorphous silica, • NEOSYL ^® GP amorphous synthetic silicon dioxide, • MICROCAL ^® ET, precipitated amorphous synthetic hydrated calcium silicate, • ALUSYL ^® ET, precipitated amorphous hydrated aluminosilicate, • Tricalcium phosphate.

2. Results A pea starch similar to that of Example 1, is compared to the granular corn starch FLUIDAMID ^® A, potato starch native earth (marketed by the applicant), and a mixture 50% native corn starch / 50% native starch.

3. Measuring the height of a powder cone Material: cylinder 50 mm in diameter and 5 mm thick, fixed on a foot so that the upper edge of the metal disc is 80 mm high, sieve metal of 500 μm, ruler graduated in mm.

Procedure: place the 500 μm sieve 10 cm above the top of the cylinder. Sprinkle the powder through the sieve to make it "snow". Continue this operation until a pointed cone forms on the cylinder and the height of this cone is stabilized (it may be necessary to repeat this operation several times if the cone collapses) . Measure the height of the cone using the ruler.

Results: the results correspond to the arithmetic mean of two measures of the height of the cone, expressed in cm.

4. Measurement of dust 25 g of anti-caking powder are introduced into a closed 2-liter glass jar. The jar is turned over 5 times in succession and then placed on a work surface. Note the time taken for all the suspended dust to settle. The results in seconds correspond to the average of the values obtained for 2 measurements.

EXAMPLE 4: ADHESIVE AGENT / PLASTERBOARDS

1. Formulation was evaluated the adhesive strength of different granular modified pea starches in the manufacture of gypsum wallboard, compared to the fluidized starch maize FLUITEX ^® 065X (control) sold by the Applicant in this application.

The pea starches evaluated are the following: acetylated fluidized pea starch having an acetyl number of 2.3% and a water content of

12%, adjuvant of 30 parts by weight of precipitated amorphous silica AEROSIL ^® RL972 for 10,000 parts of pea starch (Starch 1), acetylated fluidized pea starch having an acetyl index of 1.6% and a water content 12.1%, adjuvant of 30 parts by weight of amorphous silica precipitate AEROSIL ^® RL972 for 10,000 parts of pea starch (Starch 2), pea starch oxidized with bleach obtained by treating at around 30 ° C a pea starch milk with 34% DM, 33% in flight. / corn, bleach (chlorometric degree: 47 °, pH regulation at 9.5), then leaving in contact until the bleach is used up and finally, neutralizing filtering and drying the starch oxidized thus obtained. This starch is adjuvant to 30 parts by weight of amorphous precipitated silica AEROSIL ^® RL972 to 10,000 units pea starch (Starch 3), pea starch having the composition mentioned in Example 1 and used as a raw material in the manufacture starches of 1-3 above, also adjuvant to 30 parts by weight of amorphous precipitated silica AEROSIL ^® RL972 to 10,000 units pea starch (starch 4). Starches 1 to 4 and the Witness are used in the manufacture of plasterboard according to a determined and constant manufacturing protocol. The adhesive power is evaluated by a tear test of the cartons (front and back sides) constituting the plasterboard. The witness is constituted.

2. Results

no bonding 20 excellent bonding Measurement of the pull-out Material: a 1 1 plastic pot, a 2 1 stainless steel mixing bowl, 3 ovens, one of which is saturated with water, a removable 7.5 cm x 15 cm rectangular mold, a weight of 10 kg, 2 PVC plates of 7.5 cm x 9 cm.

Procedure: cut cardboard plates (of the type used for plasterboard) to the dimensions of 7.5 cm x 15 cm. Mix 300 g of plaster with plasterboard with 1.5 g of accelerator (dried crushed tile) and the amount of starch to test in the 1 1 plastic pot. In the mixing bowl, weigh 210 g of water drinkable at 20 ° C then introduce the powder mixture. Thoroughly mix for 45 s. Pour the mix into the mold at the bottom of which a sheet of cardboard for plasterboard has been previously deposited (Kraft side on top) then cover the top of the mold with a second sheet of cardboard (Kraft side below). Place the 2 PVC plates on the cardboard so as to cover the mold. Place the 10 kg weight on the two plates. Wait 10 minutes to remove the weight and unmold the plate. Let the field rest before for 10 minutes. Place the plate vertically in the first oven saturated with water and regulated at 180 ° C for 20 minutes, then in a second ventilated oven at 110 ° C for 20 minutes and finally in a third ventilated oven at 45 ° C for 24 h. Recondition the plate obtained for 24 h at 20 ° C and 65% RH. Using a cutter, trace 2 diagonal notches on each side of the plate. Evaluate the bonding by peeling off the paper, starting from the center and pulling in the 4 opposite directions.

Claims

1. Pulverulent or granulated composition, useful for the preparation of products for non-food and non-pharmaceutical use, characterized in that it contains: at least one legume starch which has: a) a starch content greater than 90%, b) a protein content of less than 5%, and c) an amylose content of more than 20% and less than 60%, these percentages being expressed in dry weight relative to the total dry weight of said legume starch, and at least one selected additive from a flow agent, a bulking agent, a polymer, an active ingredient or a mixture thereof.

2. Composition according to claim 1, characterized in that the legume starch has: a) a starch content greater than 95% (dry / dry), b) a protein content less than 2%, and c) a amylose content between 22 and 55% (dry / dry).

3. Composition according to claim 2, characterized in that the legume starch is a pea starch having: a) a starch content greater than 98%

(dry / dry), b) a protein content of less than 1%, and c) an amylose content of between 33 and 45% (dry / dry).

4. Composition according to one of claims 1 to 3, characterized in that the legume starch has a total content of constituents other than starch and proteins less than 5% (dry / dry).

5. Composition according to any one of claims 1 to 4, characterized in that the additive content is between 1 and 9000 parts, preferably between 3 and 6000 parts, more preferably between 10 and 4000 parts, for 10 000 parts of legume starch (dry / dry).

6. Composition according to any one of claims 1 to 5, characterized in that the legume starch is a granular starch, native or modified.

7. Composition according to any one of claims 1 to 6, characterized in that the legume starch is a retrograde starch and / or resistant to enzymes.

8. Composition according to any one of claims 1 to 6, characterized in that the legume starch is a pregelatinized starch.

9. Composition according to any one of claims 1 to 8, characterized in that the additive is a flow agent, preferably present in a content of between 1 and 200 parts per 10,000 parts of legume starch ( dry / dry).

10. Composition according to any one of claims 1 to 8, characterized in that the additive is a filler, preferably present in a content between 50 and 9000 parts, and more preferably between 100 and 6000 parts, for 10 000 parts of legume starch (dry / dry).

11. Composition according to any one of claims 1 to 8, characterized in that the additive is a polymer, preferably present in a content of between 10 and 6000 parts, more preferably between 100 and 4000 parts, for 10 000 parts legume starch (dry / dry).

12. Composition according to any one of claims 1 to 8, characterized in that the additive is an active principle, preferably present in a content of between 1 and 9000 parts, more preferably between 10 and 6000 parts, for 10 000 parts of legume starch (dry / dry).

13. Use of a composition according to any one of claims 1 to 12, in the manufacture of detergent, phytosanitary or absorbent powders, adhesives, construction materials, plastics or textiles, in particular as a support anti-foaming agent, disintegrating tablets, anti-caking agent for off-set printing and adhesive agent for plasterboard.

14. Use of a legume starch having: a) a starch content greater than 90% (dry / dry), b) a protein content less than 5% (dry / dry), and c) an amylose content greater than 20% and less than 60% (dry / dry), for the preparation of a pulverulent or granulated composition for non-food and non-pharmaceutical use, said composition containing or being intended to contain at least one additive chosen from an agent for flow, a bulking agent, a polymer, an active ingredient or a mixture thereof.

15. Use of a legume starch for the preparation of an anti-caking agent for off-set printing.