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WO2008077270A1 - Polyuréthane exempt de solvant, sa préparation et son application - Google Patents

Polyuréthane exempt de solvant, sa préparation et son application Download PDF

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Publication number
WO2008077270A1
WO2008077270A1 PCT/CN2006/003548 CN2006003548W WO2008077270A1 WO 2008077270 A1 WO2008077270 A1 WO 2008077270A1 CN 2006003548 W CN2006003548 W CN 2006003548W WO 2008077270 A1 WO2008077270 A1 WO 2008077270A1
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WO
WIPO (PCT)
Prior art keywords
solventless polyurethane
polyurethane
impregnated film
solventless
mold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2006/003548
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English (en)
Chinese (zh)
Inventor
Jinhe Lin
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to PCT/CN2006/003548 priority Critical patent/WO2008077270A1/fr
Publication of WO2008077270A1 publication Critical patent/WO2008077270A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/721—Two or more polyisocyanates not provided for in one single group C08G18/73 - C08G18/80
    • C08G18/724—Combination of aromatic polyisocyanates with (cyclo)aliphatic polyisocyanates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
    • C08G18/4202—Two or more polyesters of different physical or chemical nature

Definitions

  • the present invention relates to the field of polyurethanes, and more particularly to a novel solventless polyurethane and a process for the preparation thereof, and to the use of the solventless polyurethane in the manufacture of impregnated film articles.
  • the invention relates to the use of the solventless polyurethane in the manufacture of gloves. Background technique
  • a solventless polyurethane is a polymer material obtained by polycondensing a component such as an isocyanate and a hydroxyl group-containing compound in the absence of a solvent, which retains not only the excellent properties inherent in the conventional polyurethane materials, but also the materials themselves. Containing any solvent, it has received a lot of attention in many fields today, as environmental protection calls are getting louder and louder.
  • USP 5,151,484 discloses a solventless polyurethane which has good flexibility and elasticity.
  • the prior art solvent-free polyurethanes are mainly used in the industrial fields of construction, wood, machinery, etc., and therefore most of the components are free of free isocyanate and heavy metal catalysts, etc., but due to the impregnation of the film products In close contact with the human body, the residue of these components will make the prior art solvent-free polyurethane disadvantageous in the application of the impregnated film product, that is, the safety is poor.
  • the prior art solvent-free polyurethane is generally required to be sprayed under high temperature and high pressure due to high viscosity. Therefore, the spraying process is relatively complicated compared to the dipping method, and especially In the case of a complex shaped film such as a glove, the spraying process is difficult to effectively realize its shape, and the operation is difficult.
  • the present invention relates to the following aspects:
  • the solventless polyurethane of aspect 1 characterized in that the solventless polyurethane has a residual NCO group content of from 1 to 12% by weight based on the total weight of the solventless polyurethane.
  • the solventless polyurethane of aspect 2 characterized in that the solventless polyurethane has a residual NCO group content of from 3 to 5% by weight based on the total weight of the solventless polyurethane.
  • the solventless polyurethane of aspect 1 characterized in that in the binary diisocyanate mixture, the molar ratio of the isophorone diisocyanate to the diphenyldecane diisocyanate is 99:1 1:99.
  • the solventless polyurethane of aspect 1 characterized in that the molar ratio of the NCO group of the component (a) to the total OH functional group of the components (b) and (c) is 1 to 2 :1.
  • the solventless polyurethane of aspect 10 characterized in that the molar ratio of the NCO group of the component (a) to the total OH functional group of the components (b) and (c) is 1-1. 5 :1 .
  • the solventless polyurethane of aspect 11 characterized in that the molar ratio of the NCO group of the component (a) to the total OH functional group of the components (b) and (c) is 1-1.2:1.
  • the solventless polyurethane of aspect 1 characterized in that the molar ratio of the NCO group of the component (a) to the OH functional group of the component (b) is from 1 to 5:1.
  • the solventless polyurethane of aspect 13 characterized in that the molar ratio of the NCO group of the component (a) to the OH functional group of the component (b) is from 1 to 3.5:1.
  • the solventless polyurethane of aspect 14 characterized in that the molar ratio of the NCO group of the component (a) to the OH functional group of the component (b) is 1-2:1.
  • a method for producing a solventless polyurethane comprising the step of subjecting the above components (a), (b) and (c) to a polycondensation reaction in the absence of a solvent in the presence of a polycondensation catalyst.
  • organotin compound is selected from the group consisting of dibutyltin dilaurate, stannous octoate, dibutyltin didodecyltin and dibutyltin diacetate.
  • An impregnated film article characterized in that it is produced by a dipping method using the solventless polyurethane of any one of aspects 1-15.
  • a method of making an impregnated film article comprising the steps of:
  • a method of producing an impregnated film article comprising the steps of:
  • the invention manufactures the impregnated film product by adopting a specific solventless polyurethane, which avoids the complicated process that the prior art must face in manufacturing the impregnated film product (in order to improve the smoothness, the finishing step must be increased or not Powder or powder processing steps), environmental pollution and waste of resources.
  • the polyurethane-impregnated film product of the present invention has a marked improvement in various properties such as slipperiness, mechanical properties and elasticity as compared with the prior art latex-type impregnated film product. detailed description
  • polyurethane means a polymer containing a urethane group, and the polymer may further contain a urea group or the like.
  • the present invention relates to a solventless polyurethane characterized in that it is a polycondensation reaction product of the following components:
  • the solventless polyurethane of the present invention has a low viscosity suitable for the production of impregnated film products (especially gloves) in practical use.
  • the solventless polyurethane is soft waxy or waxy at normal temperature, it is not practical to characterize the viscosity at normal temperature.
  • the solventless polyurethane is generally used at 95 ° C, so when characterizing it, the viscosity at 95 ° C is used. Degree.
  • the solventless polyurethane of the present invention has a viscosity at 95 ° C of generally 30 mPa.s - 500 mPa.s, preferably 50 mPa.s - 230 mPa.s.
  • the residual NCO content of the solventless polyurethane is generally from 1 to 12% by weight, preferably from 2 to 5% by weight, based on the total weight of the solventless polyurethane.
  • the residual NCO content is generally determined by titration.
  • the content of the free isocyanate monomer is as low as 0.12 to 0.25 wt%, and does not contain any solvent. Therefore, the solventless polyurethane is an environmentally friendly material with high safety.
  • the content of the free isocyanate monomer is generally determined by spectrophotometry using diterpene aminobenzaldehyde as a color developing solution.
  • the isocyanate component (a) In the preparation of the solventless polyurethane of the present invention by a polycondensation method, a mixture of a diisocyanate composed of MDI and IPDI is used as the isocyanate component (a). In the present invention, other isocyanate compounds other than MDI and IPDI are not employed.
  • the MDI is MDI which is liquid at room temperature (i.e., has a melting point of less than 25 ⁇ ), and various liquefied modified MDIs can be exemplified.
  • liquefaction-modified MDI refers to chemical liquefaction modification obtained by introducing a carbamate, carbodiimide or other chemical group in 4,4,-MDI (pure MDI, solid at room temperature).
  • MDI-50, 2,4' MDI blended MDI, modified with carbodiimide, uretonimine, polyol, allophanate, carbamate, etc. 4, 4, - MDI and so on is well known in the prior art, and can be produced by a known method or a commercially available product.
  • MP- 3 of Yantai Wanhua Polyurethane Co., Ltd., Isonatel 4 3 L of Dow Chemical Co., Cosmonate LK of Mitsui Takeda, and Desmodur PF of Bayer can be cited.
  • the liquefied modified MDI generally has an NCO content of 18% to 33.5%, and a viscosity at 25 Torr is generally 30 to 300 mPa.s, which is measured by a rotational viscometer.
  • the NDI content of the IPDI is generally from 37.5 % to 37.8%, and the viscosity at 20 ° C is generally 15 mPa ⁇ s, which is measured by a rotational viscometer.
  • Specific examples thereof include polyadipate-based polyester polyols, polycaprolactone-based polyester polyols, and polycarbonate-based polyester polyols satisfying the above conditions. One or more.
  • Such a polyol component (b) is known per se in the prior art, and can be produced by a known method or a commercially available product.
  • PBA-580 of Yantai Synthetic Leather Factory and CAPA2125 of Solvay Interox Company of the United Kingdom can be cited.
  • the polyol component (c) is also used, which has a melting point of 30-35'C and a molecular weight of 300-1500.
  • a polyester polyol having a functionality greater than two Specifically, one or more of a polyadipate-based polyester polyol, a polycaprolactone-based polyester polyol, and a polycarbonate-based polyester polyol satisfying the above conditions can be given.
  • Such a polyol component (c) is known per se in the prior art, and can be produced by a known method or a commercially available product.
  • a commercial item CAPA3050, 3091, etc. of Solvay Intero, UK are mentioned.
  • the viscosity of the polycondensation reaction system can be lowered, the polycondensation reaction can be uniformly performed, and the isocyanate component can be sufficiently reacted with little residue.
  • the molar ratio of the IPDI to the MDI is from 99:1 to 1:99, preferably from 1 to 10:1, further preferably from 1 to 5:1, still more preferably from 1 to 1. 4:1.
  • the molar ratio of the NCO group of the component (a) (referring to the total content of the NCO groups of MDI and IPDI) to the total OH functional groups of the components (b) and (c) is 1-2: 1, preferably 1-1.5:1, further preferably 1-1.2:1.
  • the molar ratio of the NCO group of the component (a) to the OH functional group of the component (b) is from 1 to 5:1, preferably from 1 to 3.5:1, further preferably from 1 to 2:1.
  • the solventless polyurethane obtained by the present invention is not only safe, but also has low environmental pollution, and is very suitable for producing an impregnated film product.
  • the present invention relates to a process for producing a solventless polyurethane as described above, which comprises subjecting the above-mentioned components in the absence of a solvent in the presence of a polycondensation catalyst ( a), (b) and (c) are the steps of carrying out the polycondensation reaction.
  • the method for producing the solventless polyurethane of the present invention can be carried out in a manner conventionally employed in the art for preparing a solventless polyurethane.
  • a reaction condition for example, The temperature is generally from 50 ° C to 100 ° C, the reaction time is usually from 3 to 8 hours, and the stirring speed is from 100 to 170 rpm.
  • the catalyst used is selected from organotin which is less toxic. Class of compounds.
  • organotin compound include dibutyltin dilaurate, stannous octoate, dibutyltin didodecyltin, and dibutyltin diacetate, and particularly preferably stannous octoate which is less toxic and suitable for use in medical products. .
  • the specific amount of the catalyst is preferably from 0. 01% to 0.06% by weight based on the total weight of the components (a), (b) and (c), further preferably 0.03%-0.05%.
  • the solventless polyurethane of the present invention is very suitable for use in the manufacture of impregnated film articles.
  • the present invention in a further embodiment, relates to a immersion film product.
  • the impregnated film product is produced by the impregnation method using the solventless polyurethane of the present invention.
  • the impregnated film article is a glove.
  • the impregnation may be carried out according to a conventional addition amount in the art.
  • Additives commonly used in the manufacture of impregnated film products such as antifoaming agents, antioxidants, ultraviolet absorbers, etc., are added to the solventless polyurethane of the present invention before or during the manufacture of the film product. Therefore, the impregnated film product of the present invention may be produced directly from the solventless polyurethane of the present invention, or may be produced by adding an appropriate additive to the solventless polyurethane.
  • the impregnated film product made of the solventless polyurethane of the present invention has a simple manufacturing process (no need to increase the coating step or the powder-free or powder-processing step to improve its coolness). Slip), no environmental pollution, and no waste of resources, the final product has obvious improvement in various performances such as smoothness, strength, comfort and elasticity.
  • the safety is also poorly overcome (for example, a large amount of toxic free isocyanate is present in the manufacturing process, and heavy metals remain in the manufactured product. The problem is even harmful to the human body, and there are also significant improvements in the performance of the smoothness, strength, comfort and elasticity.
  • the impregnated film product of the present invention is impregnated by the solventless polyurethane of the present invention.
  • the present invention also relates to a method for producing the above-mentioned impregnated film product (manufacturing method 1), characterized in that it comprises the following steps:
  • the method of producing the impregnated film article of the present invention is a continuous manufacturing method (manufacturing method 2), that is, it comprises the following steps:
  • the step of producing the solventless polyurethane that is, the step (1) in the production method 2
  • the step of producing the impregnated film product using the solventless polyurethane that is, the production
  • the steps (2) and (3) in the method 2 are combined and integrated.
  • the continuous manufacturing method can eliminate the steps of transportation, storage and heating of the solventless polyurethane, thereby simplifying the manufacturing method of the film product, saving energy and resources, and reducing the manufacturing cost of the film product.
  • the impregnated film product which meets the expected requirements can be directly obtained online, and therefore the method has high process flexibility and high adaptability.
  • the continuous manufacturing method can reduce the complexity and size of the industrial production line by integrating the steps of manufacturing the solventless polyurethane and the step of manufacturing the impregnated film product using the solventless polyurethane, thereby reducing the equipment cost. And maintenance costs and the like, thereby further reducing the manufacturing cost of the impregnated film product, which is very advantageous for industrial applications.
  • the production step of the solventless polyurethane i.e., the step (1) in the production method 2 is applied to the entire contents of the solventless polyurethane production method described in the present invention.
  • the mold may be subjected to an external release agent treatment as needed before performing the impregnation step.
  • the external mold release agent used in the present invention is not particularly limited, and those which are commonly used in the field of polyurethane elastomer production can be used, and examples thereof include silicone, paraffin (including liquid paraffin), polyethylene wax, talc, and higher fatty acid metal salts. Or a mixture of one or more thereof, or an aqueous emulsion or the like comprising one or more of these external release agents.
  • the mold is preferably preheated to 95 to 100 ° C before the impregnation step, as needed.
  • the solventless polyurethane is also preferably preheated to 95 to 100 Torr before the impregnation step; and in the production method 2, by the solventless polyurethane produced by the step (1)
  • the impregnation step can be carried out by adjusting the temperature to 95-100 °C.
  • the immersion time is not particularly limited, but is usually from 1 to 10 seconds.
  • the heat treatment temperature is generally 150 ⁇ 180 ⁇ , preferably 160 ° C to 170 ° C
  • the heat treatment time is generally 5-15 minutes, preferably 7-12 minutes, thereby curing the solventless polyurethane, thereby The impregnated film product of the present invention is obtained.
  • the obtained impregnated film product can be peeled off from the mold.
  • the impregnated film product obtained by the present invention there are no bright spots, flow marks, water marks, and the like on the surface, and the blocking resistance is also good. Moreover, compared with the prior art latex-type impregnated film products, there are significant improvements in various performance properties such as smoothness, strength, comfort and elasticity.
  • the type of the impregnated film product produced by the present invention is not particularly limited, but is generally a film type product, and the impregnated film product of the present invention is preferably a glove. Therefore, the mold used at this time is a hand mold.
  • the present invention relates to a method of producing a glove, the preparation of which is specifically exemplified below, but the method of manufacturing the glove of the present invention is not limited thereto.
  • the hand mold which has been surface-cleaned and heated to 95 °C is immersed in the outer mold release agent component, and then gently rubbed until the fingertips of the hand mold are no longer suspended. Then, the treated hand mold is immersed in the solvent-free polyurethane of the present invention at a temperature of 95-100 3-5 for 3-5 seconds, lifted, and gently smeared, and the surface is covered when the fingertip is no longer suspended by the fingertip. A handful of solvent-free polyurethane was placed in an oven and heated at 150 ° C for 10 minutes and then taken out. Next, cool the hand mold to 100 °C and roll the glove cover into a ring port. Then, the hand mold is cooled to below 90 ° C, and the glove is removed from the hand mold to obtain a glove product.
  • the hand mold is generally made of ceramic or silicon aluminum alloy.
  • the dumbbell type specimen is cut on the manufactured film product sample (the total length L of the sample is 115 mm, the distance between the clamps is 80 mm, and the length of the middle parallel strip is 1 mm is 33 mm, the gauge length L Q is 25mm, the width W of the end is 25mm, and the width W of the narrow part is 6mm. According to GB/T1040, it is stretched at 300mm/min on the tensile machine (manufactured by Shenzhen New Sansi Co., model CMT4204). Tensile strength and elongation at break were measured.
  • Appearance test Check the surface of the sample of the film product for bright spots, flow marks and water marks. No Film products with bright spots, flow marks and water marks were evaluated as qualified.
  • the viscosity is measured by a rotational viscometer method at 95 Torr, the residual NCO content is determined by titration, the free isocyanate content is determined spectrophotometrically, and the residual catalyst content and solvent content are determined. It is determined by the calculated value.
  • the metered polyol component (b) (polyadipate diol, grade PBA- 580 0, Yantai Wanhua Polyurethane Group Co., Ltd., having a hydroxyl value of 205.00 mgKOH/g and a molecular weight of 580, Viscosity (75 ° C) is 50-150 mPa.s, melting point is 30-40 ° C) and polyol component (c) (polycaprolactone triol, grade CAPA-30 5 0, Solvay lnterox, UK, The hydroxyl value is 310.00 mgKOH/g, the molecular weight is 540, the viscosity (60 ° C) is 160 mPa ⁇ s, the melting point is 0-10 ° C), and the distillation is carried out under vacuum conditions (vacuum degree -0.09 MPa) at 100 ° C: After 1 hour, and then cooled to 50 ° C, IPDI and L-MDI (liquefaction modified
  • the metered polyol component (b) (polyadipate diol, grade MX-355, Yantai Wanhua Polyurethane Group Co., Ltd., hydroxyl value 118.00 mgKOH/g, molecular weight 1000, viscosity (75 ° C) is 100-300 mPa.s, melting point is 20-30 ° C) and polyol component (c) (polycaprolactone triol, grade CAPA3091, Solvay Interox, UK, hydroxyl value 183.00 mgKOH /g, molecular weight 900, viscosity (60 ⁇ ) 165 mPa.s, melting point 0-10 ° C) steamed under 110 ⁇ , vacuum conditions (vacuum degree -0.09 MPa) Distillation treatment for 3 hours, then cooling to 60 ° C, IPDI and L-MDI as component (a) (carbodiimide modified MDI, grade MDI-100HL, Yantai
  • the metered polyol component (b) (polycaprolactone diol, grade CAPA2125A, Solvay Interox, UK, hydroxyl value 90.00 mgKOH / g, molecular weight 1250, viscosity (60 ° C ) is 175 mPa.s, melting point is 34-45 ° C) and polyol component (c) (polycaprolactone tetraol, grade CAPA4101, Solvay Interox, UK, hydroxyl value 218.00 mgKOH/g, molecular weight 1000, Viscosity (60 ° C) is 260 mPa.s, melting point is 10-20 ⁇ ) Distilled at 120 ° C under vacuum conditions (vacuum degree -0.09 MPa) for 6 hours, then cooled to 70 ° C temperature conditions, will be used as Component) EPDI and L-MDI (carbodiimide modified MDI, grade ISonatel 43L, Dow Chemical, NCO
  • Example 1 the method for producing a glove will be specifically described, and the impregnated film product of the present invention and the method for producing the same will be specifically described.
  • the present invention is not limited to gloves, and other impregnated film products can be similarly produced by the following methods.
  • the temperature is adjusted after the production. It is 95 ⁇ and keep the temperature ready for use).
  • a hand mold high alumina content ceramic hand mold, Thailand, Euroceramic Technologies Co., Ltd., grade ECT
  • an external release agent liquid paraffin, Beijing Yanlan
  • Chemical Factory Co., Ltd. The fingertips are no longer suspended with droplets.
  • the treated hand mold is immersed in the solventless polyurethane for 2 seconds, then lifted up, and gently rubbed.
  • the hand mold When the fingertip is no longer suspended by the fingertip, the hand mold is sent to the oven and uniformly heated to 165 °C. , take it out after 10 minutes. Cool the hand mold to 100 and then roll the glove cover into a ring port. The hand mold is cooled to below 90 ° C, and the glove is removed from the hand mold to obtain a glove product.
  • a commercially available nitrile latex (manufactured by Lanzhou Petrochemical Co., Ltd.) was preheated to 95 Torr.
  • a hand mold high alumina content ceramic based hand mold, Thailand, Euroceramic Technologies Co., Ltd., grade ECT) that has been surface cleaned and heated to 95 ° C is immersed in an external release agent (liquid paraffin, Beijing Yan) In Lanhua Factory Co., Ltd., it is lightly swayed after lifting, and no droplets are suspended from the fingertips of the hand mold.
  • the treated hand mold is immersed in the nitrile latex for 2 seconds, then lifted up, gently rubbed, and when the fingertip is no longer suspended with a drop, the hand mold is sent to the oven and uniformly heated to 180 ° C. Take it out after 15 minutes.
  • the hand mold is cooled to 110 ° C, and then immersed in water-based polyurethane emulsion (brand LS122) for 3 seconds, then lifted, gently smashed, when the fingertips are no longer hanging with drops, the hand mold is sent into the oven evenly Heat to 180 ° C, take it for 5 minutes and take it out. Cool the hand mold to 100 ⁇ and then roll the glove cover into a ring port.
  • the hand mold is cooled to below 90 , and removed from the hand mold to obtain a glove product.
  • the hand mold is cooled to 110 ° C, and then immersed in water-based polyurethane emulsion (brand LS120) for 3 seconds, then lifted, gently smashed, when the fingertips are no longer hanging with drops, the hand mold is sent to the oven evenly Heat to 180 ° C, take it out after 15 minutes. Cool the hand mold to 100 ⁇ and then roll the glove cover into a ring port. The hand mold is cooled to below 90 ° C and taken off from the hand mold to obtain a glove product.
  • water-based polyurethane emulsion brand LS120
  • a commercially available nitrile latex (manufactured by Lanzhou Petrochemical Co., Ltd.) was preheated to 95 °C.
  • a hand mold high alumina content ceramic based hand mold, Thailand, Euroceramic Technologies Co., Ltd., grade ECT) that has been surface cleaned and heated to 95 ° C is immersed in an external release agent (liquid paraffin, Beijing Yan) In Lanhua Factory Co., Ltd., it is lightly swayed after lifting, and no droplets are suspended from the fingertips of the hand mold.
  • the treated hand mold was immersed in the nitrile latex for 2 seconds, then lifted, and gently rubbed. When the fingertips were no longer suspended by the fingertips, the hand mold was sent to the oven and uniformly heated to 180.
  • the hand mold takes it out after 15 minutes.
  • the hand mold is cooled to 110 ° C, and then immersed in a modified starch aqueous dispersion (Linyi City Modified Starch Factory, surface sizing starch) for 3 seconds, then lifted, scorned, and the fingertips are no longer suspended.
  • a modified starch aqueous dispersion Li City Modified Starch Factory, surface sizing starch
  • the hand mold is sent to an oven and uniformly heated to 180 ° C for 15 minutes and then taken out.
  • the hand mold was cooled to 100 ° C, and then the glove sleeve was rolled into a ring port.
  • the hand mold is cooled to below 90 °C, and the glove is removed from the hand mold to obtain a glove product.
  • a commercially available nitrile latex (manufactured by Lanzhou Petrochemical Co., Ltd.) was preheated to 95 °C.
  • a hand mold high alumina content ceramic based hand mold, Thailand, Euroceramic Technologies Co., Ltd., grade ECT) that has been surface cleaned and heated to 95 ° C is immersed in an external release agent (liquid paraffin, Beijing Yan) Lanhua Factory Co., Ltd.), scorned after lifting, until the fingertips of the hand model no longer hangs.
  • the treated hand mold is immersed in the nitrile latex for 2 seconds, then lifted up, gently rubbed, and when the fingertip is no longer suspended with a drop, the hand mold is sent to the oven and uniformly heated to 180 ° C.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

L'invention concerne un polyuréthane exempt de solvant qui est un produit de polycondensation des composants suivants : (a) un mélange diisocyanate binaire de diphénylméthane diisocyanate et d'isophorone diisocyanate, (b) un polyester polyol présentant un point de fusion de 30 à 35 °C, un poids moléculaire compris entre 300 et 1500 et une fonctionnalité de 2, et (c) un polyester polyol présentant un point de fusion de 30 à 35 °C, un poids moléculaire compris entre 300 et 1500 et une fonctionnalité supérieure à 2. L'invention concerne également un processus destiné à préparer le polyuréthane exempt de solvant, et l'application du polyuréthane exempt de solvant à la préparation de produits de film par procédé d'imprégnation. Le produit de film de polyuréthane produit par le procédé d'imprégnation présente des performances améliorées telles qu'une propriété de glisse, une propriété mécanique et une propriété élastique, par rapport au produit correspondant de l'art antérieur. L'invention concerne également l'application du polyuréthane exempt de solvant à la préparation de gants.
PCT/CN2006/003548 2006-12-22 2006-12-22 Polyuréthane exempt de solvant, sa préparation et son application Ceased WO2008077270A1 (fr)

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PCT/CN2006/003548 WO2008077270A1 (fr) 2006-12-22 2006-12-22 Polyuréthane exempt de solvant, sa préparation et son application

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PCT/CN2006/003548 WO2008077270A1 (fr) 2006-12-22 2006-12-22 Polyuréthane exempt de solvant, sa préparation et son application

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104497949A (zh) * 2014-12-02 2015-04-08 佛山铭乾科技有限公司 一种新型高固含量水性聚氨酯鞋用胶粘剂的制备方法

Citations (5)

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US5173560A (en) * 1990-09-06 1992-12-22 Huels Aktiengesellschaft Cold-curing solvent free, duroplastic polyurethane-polyurea compounds
JPH0978028A (ja) * 1995-09-14 1997-03-25 Yokohama Rubber Co Ltd:The 無溶剤型プライマー組成物
JP2003103735A (ja) * 2001-09-27 2003-04-09 Toppan Printing Co Ltd 化粧シート
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CN104497949A (zh) * 2014-12-02 2015-04-08 佛山铭乾科技有限公司 一种新型高固含量水性聚氨酯鞋用胶粘剂的制备方法

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