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CN1183215C - Process for preparation of leather bottom-closing coating and decorating agent - Google Patents

Process for preparation of leather bottom-closing coating and decorating agent Download PDF

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Publication number
CN1183215C
CN1183215C CNB991150902A CN99115090A CN1183215C CN 1183215 C CN1183215 C CN 1183215C CN B991150902 A CNB991150902 A CN B991150902A CN 99115090 A CN99115090 A CN 99115090A CN 1183215 C CN1183215 C CN 1183215C
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preparation
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gram
ammonium halide
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CNB991150902A
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CN1285379A (en
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邵双喜
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Chengdu Institute of Organic Chemistry of CAS
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Chengdu Institute of Organic Chemistry of CAS
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  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Abstract

The present invention relates to a method for preparing a bottom sealing coating agent for tanning. The preparation method of the present invention comprises the following steps: 0.4% to 6.0% of sericin, 0 to 5.0% of cationic surface active agent, 0.04% to 3.0% of micromolecule acid, 5.0% to 25% of acrylate monomer, 0.5% to 10.0% of nitrogen-containing monomer, 0 to 6.0% of hydroxyl-containing monomer and water react under the temperature of 50 to 95DEGC for 4 to 12 hours; 0 to 3.6% of alcohol compound is added to react continuously for 0.5 hours to obtain the leather bottom sealing coating agent of the present invention. The product of the present invention has the advantages of good emulsion stability, long storage period, saving of the consumption of other leather chemical products, comfort and softness of finished leather, natural and bright luster of the finished leather, firm adhesion of a coating layer, dry scraping resistance and wet scraping resistance, high hiding rate and repairing property.

Description

The preparation method of leather bottom-closing coating and decorating agent
The present invention is the bottom-closing coating and decorating agent preparation method that a kind of process hides is used, and it belongs to the preparation of natural polymer albumen graft copolymer.
Protein finishes is the important class in the hide finishes, wherein is typical case's representative especially with the casein.Casein is commonly called as casein, lactic casein.But it has premium propertiess such as strong, high temperature resistant, withstand voltage, the anti-flatiron polishing of clinging power, and the coating gloss height that forms, hand feel and drape, and sanitation performance is good.But the casein film-forming properties is poor, crisp, the poor water resistance of gel rerum natura.So people are devoted to the modification of casein always, or seek other surrogate, as: gelatin, feather protein, Keratin sulfate.
By modification to casein and surrogate thereof, improve deficiency, improve application performance, the albumen finishing agent still is widely used.The existing many products of modified Casein finishing agent come out, as the BI of the Baysin of the Luron of German BASF AG, Bayer company, Dutch Stahl company.Czech patents CS277110 has reported and has utilized the modification of chrome tanning waste protein hydrolysate through acrylic polymers, has been prepared into hide finishes.Yet this series products all is the negatively charged ion product, as the positively charged ion bottom-closing coating and decorating agent, reports very few.
Silk sericin is present in the cocoon layer, accounts for 20~30% of silk weight, usually as the throwing byproduct with discharge of wastewater.This not only causes the waste of resource, has also aggravated the pollution of environment, thereby, be badly in need of being used.Daily use chemicals, feedstuff industry are more common in the utilization of silk sericin, also can be in order to amino acid whose refine, but do not see any bibliographical information as the cationic leather bottom-closing coating and decorating agent.
The objective of the invention is to replace casein, adopt a kind of new prescription and the agent of prepared cationic leather back cover,, improve Atom economy to reduce the use of leather chemicals with silk sericin; Utilizing waste to produce leather chemicals, save resource, reduce production costs, also is very friendly to ecotope.
Leather bottom-closing coating and decorating agent prescription of the present invention is composed as follows: sericin 0.4%~6.0% (weight, down together), cats product 0~5.0%, small molecules acid 0.04%~3.0%, acrylate monomer 5.0%~25%, nitrogen containing monomer 0.5%~10.0%, hydroxyl monomer 0~6.0%, surplus are water, are initiator with persulphate and sulphite, under 50~95 ℃, carry out emulsion graft copolymerization reaction 4~12 hours, thereby obtain leather bottom-closing coating and decorating agent of the present invention.
In above-mentioned prescription, also can add alcohol compound, add-on is 0~3.6%, gets leather bottom-closing coating and decorating agent of the present invention.
Sericin refine and getting from by product silk material or wastewater from silk reeling wherein.
Cats product is a dodecyl dimethyl benzyl ammonium halide (1227), dodecyl trimethyl-ammonium halide (1231), cetyl trimethyl ammonium halide (1631), octadecyl trimethyl-ammonium halide (1831).
Small molecules acid is hydrochloric acid, phosphoric acid, (methyl) vinylformic acid, formic acid.
Ester group is C in the acrylate monomer 2~C 20Esters monomer.
Nitrogen containing monomer is acrylamide, dimethylaminoethyl acrylate methyl base amido ethyl ester, (methacryloxy-trimethylammonium) ammonium halide, (methacryloxy-dimethyl-butyl) ammonium halide, (methacryloxy-dimethyl-ethyl) ammonium halide.
The hydroxyl monomer is (methyl) Hydroxyethyl acrylate, (methyl) Propylene glycol monoacrylate, N hydroxymethyl acrylamide.
Alcohol compound is ethylene glycol, propylene glycol, glycerol, polyoxyethylene glycol (M=90~1200).
Reaction process of the present invention is all under agitation carried out, and rotating speed is 60~120rpm.
Form by above-mentioned prescription, concrete operations of the present invention are: silk gum and suitable quantity of water are dropped in the reactor, start stirring and slowly be warming up to 50~70 ℃, add small molecules acid more successively, cats product and nitrogen containing monomer, stir and add acrylate and hydroxyl monomer after 0.5~2 hour, supply the water yield, emulsification 1~2 hour, add persulphate and sulphite initiator, reacted 2~4 hours down, be warming up to 70~95 ℃ then at 50~70 ℃, reacted again 2~4 hours, add alcohol compound, stirred 0.5 hour, cooling discharge gets leather bottom-closing coating and decorating agent of the present invention.
The bottom-closing coating and decorating agent good emulsion stability of the present invention's preparation surpasses half a year storage period.Use positively charged ion bottom-closing coating and decorating agent of the present invention, method is simple, and effect is obvious.Behind bottom-closing coating and decorating agent back cover of the present invention, can effectively stop the further infiltration in leather of follow-up anionic materials, not only can reduce the consumption of subsequent material, and the leather softness is comfortable, gloss is bright naturally.The coating clinging power is strong, Bearable dry and wet wipe, and hiding rare is strong, has certain benefit wound property, helps improving the grade of wounded or disabled skin.
Below be embodiments of the invention.
Embodiment one
Get sericin 8 gram (account for total amount 1.6%), add reaction flask, add water 180 grams again, be heated to 50 ℃, stir and to add 36% hydrochloric acid, 0.3 gram (account for total amount 0.04%) down successively, 3,0%1,227 6.5 grams (account for total amount 0.4%), acrylamide 6 grams (account for total amount 1.2%), stir and add ethyl propenoate 30 gram (account for total amount 5.9%) after 2 hours more successively, vinylformic acid stearyl 5 grams (account for total amount 1.1%).Rocryl 410 2 gram (account for total amount 0.4%), water 275 grams are 50 ℃ of following stirring and emulsifying half an hour, add persulphate 0.5 gram and sulphite 0.2 gram then, reacted 4 hours down, be warming up to 80 ℃ of reactions 2 hours again at 50 ℃, cooling discharge gets finished product 510 grams.
Embodiment two
Get sericin 15 gram (account for total amount 2.8%), add reaction flask and add water 150 grams again, be heated to 60 ℃, stir and to add 85% phosphatase 11 .0 gram (account for total amount 0.2%) down successively, vinylformic acid 3 gram (account for total amount 0.6%), 7,0%1,631 18 grams (account for total amount 2.4%), dimethylaminoethyl acrylate methyl base amido ethyl ester 10 gram (account for total amount 1.9%), stir and to add butyl acrylate 40 grams (account for total amount 7.5%) after half an hour more successively, dodecylacrylate 6 gram (account for total amount 1.1%), N hydroxymethyl acrylamide 5 gram (account for total amount 0.9%), water 280 grams, in 60 ℃ of stirring and emulsifying 2 hours, add persulphate 0.8 gram and sulphite 0.4 gram then, reacted 3 hours down at 60 ℃, be warming up to 90 ℃ of reactions 1 hour again, add glycerol 5 gram (account for total amount 0.9%) reaction 0.5 hour at last, cooling discharge, finished product 530 grams.
Embodiment three
Get sericin 25 gram (account for total amount 4.8%), add reaction flask and add water 180 grams again, be heated to 70 ℃, stir and to add 85% formic acid, 8 grams (account for gross weight 1.3%) down successively, acrylamide 10 gram (account for total amount 1.9%), (methacryloxyethyl-trimethylammonium) ammonium halide 37 gram (account for total amount 7.1%), stir after 1 hour, add Isooctyl acrylate monomer 60 gram (account for total amount 11.5%) more successively, Hydroxyethyl acrylate 10 grams (account for total amount 1.9%), water 175 grams, in 70 ℃ of stirring and emulsifying 2 hours, add persulphate 1.0 grams and sulphite 0.5 gram then, reacted 2 hours down at 70 ℃, be warming up to 85 ℃ again, reacted 3 hours, and added polyoxyethylene glycol (M=800) 18 gram (account for total amount 3.5%) at last, reacted 0.5 hour, cooling discharge gets finished product 520 grams.
Embodiment four
Get sericin 18 gram (account for total amount 2.9%), add reaction flask, add water 200 grams again, be heated to 60 ℃, stir and to add 85% formic acid, 20 grams (account for total amount 2.7%), 5,0%1,231 10 grams (account for total amount 0.8%) down successively, acrylamide 14 gram (account for total amount 2.2%), (methacryloxyethyl-butyl-dimethyl) ammonium halide 20 gram (account for total amount 3.2%), stirred 1 hour, add butyl acrylate 80 gram (account for total amount 12.7%) more successively, dodecylacrylate 22 gram (account for total amount 3.5%), water 240 gram in 60 ℃ of following stirring and emulsifying 2 hours, adds persulphate 1.2 grams and sulphite 0.6 then and restrains, reacted 3 hours down at 60 ℃, be warming up to 90 ℃ of reactions 1 hour again, add polyoxyethylene glycol (M=400) 10 gram (account for total amount 1.6%) at last, reacted 0.5 hour, cooling discharge gets finished product 630 grams.
Embodiment five
Get sericin 12 gram (account for total amount 1.8%), add reaction flask, add water 180 grams again, be heated to 50 ℃, stir and to add 36% hydrochloric acid, 2 grams (account for total amount 0.1%) down successively, 7,0%1,831 40 grams (account for total amount 4.1%), (methacryloxyethyl-dimethyl-ethyl) ammonium halide 12 gram (account for total amount 1.8%), stirred 2 hours, add ethyl propenoate 40 gram (account for total amount 5.9%) more successively, butyl acrylate 110 grams (account for total amount 16.3%), water 285 grams, in 60 ℃ of following stirring and emulsifying 2 hours, add people's persulphate 1.5 grams and sulphite 0.7 gram then,, be warming up to 80 ℃ of reactions 3 hours again 60 ℃ of reactions 1 hour, cooling discharge gets finished product 675 grams.
Embodiment six
Get silk gum 10 gram (account for total amount 2.2%), add reaction flask, add water 150 grams again, be heated to and add 85% phosphoric acid 5 gram (account for total amount 0.9%) under 70 ℃ of stirrings successively, dimethylaminoethyl acrylate methyl base amido ethyl ester 6 gram (account for total amount 1.3%), (methacryloxyethyl-trimethylammonium) ammonium halide 14 gram (account for total amount 3.2%), stirred 0.5 hour, add vinylformic acid cetyl ester 25 gram (account for total amount 5.6%) more successively, N hydroxymethyl acrylamide 8 gram (account for total amount 1.8%), hydroxyethyl methylacrylate 18 gram (account for total amount 4.0%), water 205 gram in 70 ℃ of following stirring and emulsifying 1 hour, adds persulphate 0.9 gram and sulphite 0.4 then and restrains, 70 ℃ of reactions 2 hours, be warming up to 90 ℃ of reactions 0.5 hour again, add ethylene glycol 8 gram (account for total amount 1.8%) at last, reacted 0.5 hour, cooling discharge gets finished product 445 grams.
Embodiment seven
Get sericin 4 gram (account for total amount 0.7%), add reaction flask and add water 160 grams again, be heated to 50 ℃, stir and to add 85% formic acid, 8 grams (account for total amount 1.1) down successively, 5,0%1,231 16 grams (account for total amount 1.3%), (methacryloxyethyl-dimethyl-ethyl) ammonium halide 4 gram (account for total amount 0.7%), stir after 2 hours, add butyl acrylate 60 gram (account for total amount 9.8%) more successively, Propylene glycol monoacrylate 8 grams (account for total amount 1.3%), water 345 grams, in 50 ℃ of stirring and emulsifying 2 hours, add persulphate 0.9 gram and sulphite 0.4 gram then, reacted 4 hours down, be warming up to 80 ℃ of reactions 2 hours again at 50 ℃, add propylene glycol 14 gram (account for total amount 2.3%) at last, reacted 0.5 hour, cooling discharge gets finished product 615 grams.
Embodiment eight
Get sericin 24 gram (account for total amount 3.4%), add reaction flask and add water 180 grams again, be heated to 60 ℃, stir and to add 85% phosphoric acid, 8 grams (account for total amount 1.0%) down successively, methacrylic acid 5 gram (account for total amount 0.7%), 5,0%1,231 45 grams (account for total amount 3.2%), (methacryloxyethyl-trimethylammonium) ammonium halide 25 gram (account for total amount 3.5%), acrylamide 12 gram (account for total amount 1.7%), stir after 0.5 hour, add ethyl propenoate 50 gram (account for total amount 7.1%) more successively, vinylformic acid cetyl ester 10 grams (account for total amount 1.4%), Hydroxyethyl acrylate 21 gram (account for total amount 3.0%), water 310 gram in 70 ℃ of following stirring and emulsifying 1 hour, adds persulphate 1.2 grams and sulphite 0.6 then and restrains, reacted 2 hours down at 70 ℃, be warming up to 85 ℃ of reactions 2 hours again, add polyoxyethylene glycol (M=1000) 20 gram (account for total amount 2.8%) at last, reacted 0.5 hour, cooling discharge gets finished product 705 grams.

Claims (9)

1, a kind of leather bottom-closing coating and decorating agent preparation method, it is characterized in that forming: silk sericin 0.4%~6.0% by the weight percentage of following prescription, cats product 0~5.0%, small molecules acid 0.04%~3.0%, acrylate monomer 5.0%~25%, nitrogen containing monomer 0.5%~10%, hydroxyl monomer 0~6.0%, surplus is a water, under persulphate and the effect of sulphite initiator, gets leather bottom-closing coating and decorating agent in 50~95 ℃ of reactions 4~12 hours.
2, preparation method according to claim 1 is characterized in that adding in the prescription alcohol compound 0~3.6%, 70~95 ℃ of reactions 0.5 hour, and gets leather bottom-closing coating and decorating agent.
3,, it is characterized in that sericin is to refine and get from by product silk material or wastewater from silk reeling according to the preparation method of claim 1 or 2.
4, according to the preparation method of claim 1 or 2, it is characterized in that tensio-active agent is a dodecyl dimethyl benzyl ammonium halide (1227), dodecyl trimethyl-ammonium halide (1231), cetyl trimethyl ammonium halide (1631), octadecyl trimethyl-ammonium halide (1831); Wherein halogen is Cl, Br.
5,, it is characterized in that small molecules acid is hydrochloric acid, phosphoric acid, (methyl) vinylformic acid, formic acid according to the preparation method of claim 1 or 2.
6,, it is characterized in that ester group is C in the acrylate monomer according to the preparation method of claim 1 or 2 2~C 20Esters monomer.
7, according to the preparation method of claim 1 or 2, it is characterized in that nitrogen containing monomer is an acrylamide, dimethylaminoethyl acrylate methyl base amido ethyl ester, (methacryloxy-trimethylammonium) ammonium halide, (methacryloxy-dimethyl-butyl) ammonium halide, (methacryloxy-dimethyl-ethyl) ammonium halide; Wherein halogen is Cl, Br.
8,, it is characterized in that the hydroxyl monomer is (methyl) Hydroxyethyl acrylate, (methyl) Propylene glycol monoacrylate, N hydroxymethyl acrylamide according to the preparation method of claim 1 or 2.
9,, it is characterized in that alcohol compound is that ethylene glycol, propylene glycol, glycerol, molecular weight are 90~1200 polyoxyethylene glycol according to the preparation method of claim 2.
CNB991150902A 1999-08-20 1999-08-20 Process for preparation of leather bottom-closing coating and decorating agent Expired - Fee Related CN1183215C (en)

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Cited By (1)

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CN103103765B (en) * 2013-01-14 2013-10-09 山东轻工业学院 Self-emulsifying wet-scratch-resistant leather top coat finishing agent and preparation method thereof
CN103755986B (en) * 2014-01-14 2016-05-18 陕西科技大学 The preparation method of the crosslinked heteropolymer film of a kind of casein keratinase
EP3226835B1 (en) 2014-12-02 2024-11-13 Evolved by Nature, Inc. Silk performance apparel
BR112018000699B1 (en) 2015-07-14 2023-10-17 Silk Therapeutics, Inc ARTICLE AND METHOD FOR COATING A MATERIAL
CN105694649A (en) * 2016-03-25 2016-06-22 陕西科技大学 Preparation method of antibacterial bottom sealing type cation modified casein leather finishing agent
CN106046887A (en) * 2016-06-29 2016-10-26 沈敏华 Leather finishing cream
CN106009825A (en) * 2016-06-29 2016-10-12 宋雁群 Leather-care finishing agent
CN108504797A (en) * 2018-04-18 2018-09-07 海宁玖洲家具有限公司 The Coating technology of sofa leather
CN108997942A (en) * 2018-07-26 2018-12-14 苏州华龙化工有限公司 A kind of preparation method of sericin grape pip polysaccharide composite leather gloss agent

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101016573B (en) * 2007-02-15 2012-12-05 陈晓鹏 Leather nursing liquid for eliminating formaldehyde pollution and peculiar smell, and preparing method thereof

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