CN102120877A - Ultralow-hardness polyurethane elastomer and preparation method thereof - Google Patents
Ultralow-hardness polyurethane elastomer and preparation method thereof Download PDFInfo
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Abstract
The invention relates to an ultralow-hardness polyurethane elastomer which comprises three components: a component A is diphenylmethane diisocyanate or a prepolymer thereof, wherein the prepolymer is formed by polymerizing the diphenylmethane diisocyanate and a modifier thereof with polypropylene oxide ether polyol with the functionality of 2-3 and the number-average molecular weight of 1000-8000; a component B consists of polymer polyol, a catalyst and an antiaging agent; and a component C is polymer linear monoalcohol with the number-average molecular weight of 1000-4000. When the component A is the prepolymer, the mass ratio of the component A to the component B is 1:(0.8-1.3). When the component A is the diphenylmethane diisocyanate, the mass ratio of the component A to the component B is 1:(19-27). The mass ratio of the component B to the component C is 1:(0-0.3). The invention also provides a preparation method of the ultralow-hardness polyurethane elastomer material, which is simple to formulate and easy for manufacturing; and the obtained product is environment-friendly and safe, has favorable buffering performance and compression resisting performance, the Shore hardness ranging between 0 and 15, and smooth surface or extremely low viscosity, and is used for manufacturing shoe products for buffering, resisting wearing, and the like.
Description
Technical field
The present invention relates to polyurethane elastomer and preparation method thereof, particularly super-low-hardness polyurethane elastomer and preparation method thereof.
Background technology
Cast urethane elastomer is the chemical system of cast liquid reaction mixture article of manufacture in die cavity, has physical strength height, wear-resisting, oil resistant, anti-skidding, incompressible, excellent characteristics such as durometer level is wide, shock-absorbing capacity is good, is suitable for making the footwear parts.The shoe-pad that is used for damping adopts the soft resilient material more, and common low hardness polyurethane elastic body all is to obtain by adding softening agent, and this product is by placing for a long time, softening agent can be moved to the surface of shoe-pad, pollute footgear, the hardness of shoe-pad also can raise, and its application is restricted.
Provided some examples about low hardness polyurethane elastic body in the prior art:
200910256449.3 a low hardness polyurethane elastic body composite, the preparation functionality of prepolymer is 2 or 3 in this patent, and molecular weight is at the poly(propylene oxide) ethoxylated polyhydric alcohol of 1000-3000; Having used another component functionality in the reaction is 2 or 3, and molecular weight is at poly-epoxy propyl ether polyvalent alcohol and catalyzer, the antiager etc. of 300 to 6000 scopes; Product hardness is equivalent to Shao Shi C 10 to 40 between Shao Shi A 0 to 20.
03805398.5 Thermocurable polyurethane elastomeric compositions, polyurethane elastomer and manufacture method thereof, the preparation of performed polymer macromolecule polyvalent alcohol in this patent, its molecular weight ranges is at the polyvalent alcohol of 4000-20000, and optimum molecular weight is at 8000-15000; Used solidifying agent polyoxygenated tetramethylene polyvalent alcohol and chain propagation agent small molecular weight dibasic alcohol in the reaction, as 1,4-butyleneglycol etc.; Product hardness focuses mostly between Shao Shi A 30-40 between Shao Shi A 10-70.
200580018314.3 low-hardness thermosetting polyurethane elastomer and production method thereof, the preparation of performed polymer macromolecule polyvalent alcohol in this patent, its molecular weight ranges is at the polyvalent alcohol of 5000-20000, and optimum molecular weight is at 8000-12000; In the reaction to have adopted carbonatoms be 2 to 10 to solidifying agent, is in particular 2 to 4, has the polyoxyalkylene polyol and the catalyzer of 2 to 3 hydroxyls; Product hardness is between Shao Shi A 10-40.
Summary of the invention
The objective of the invention is to overcome the defective of conventional art, super-low-hardness polyurethane elastomer and preparation method thereof is provided, the resulting product Environmental Safety, has comfortable sense of touch, good shock-absorbing capacity and anti-compression properties, durometer level between Shao Shi A 0-15, smooth surface or extremely low viscosity is arranged.
For achieving the above object, super-low-hardness polyurethane elastomer provided by the invention, made by the raw material cast of following mass fraction: the mass ratio of A component and B component is 1: 19-1: 27, the mass ratio of B component and C component is 1: 0 to 1: 0.3, wherein:
The A component is a diphenylmethanediisocyanate;
The B component is 6000-10000 by number-average molecular weight, and functionality is 3 poly(propylene oxide) ethoxylated polyhydric alcohol, catalyzer and antiaging agent composition; Wherein catalyzer is one or both in dibutyl tin laurate, the stannous octoate, accounts for the 0.01-0.5% of B component total amount, and antiaging agent is 1010, among BHT, UV-531, the UV-328 one or more, accounts for the 0.01-0.5% of B component total amount;
The C component is that number-average molecular weight is the single alcohol of polymeric linear of 1000-4000.
Super-low-hardness polyurethane elastomer of the present invention, raw material cast by following mass fraction is made: A component and B component blended mass ratio are 1: 22.1, B component and C component blended mass ratio are 1: 0.1, wherein the B component is the mixture of 3 functionality molecular weight, 7600 poly(propylene oxide) ethoxylated polyhydric alcohol Z-221,3 functionality molecular weight, 10000 poly(propylene oxide) ethoxylated polyhydric alcohol Z-3100 and dibutyl tin laurate and UV-531, and mass ratio is 1000: 1000: 3: 5; Linear single pure D-2000 of C component molecular weight 2000.
Super-low-hardness method for preparing polyurethane elastic body provided by the invention, A component, B component, C component are deposited separately, and when producing, respectively at 110 ℃, dehydration is 4 hours under the-0.08MPa condition, is cooled to 53 ℃ with B component and C component.The A component is warming up to 55 ℃, join in the component C, mix, reacted ten minutes, the B component is joined in A, the C mixture again, mixing is poured in 50 ℃ of mold cavities the demoulding in 20 minutes rapidly, 80 ℃ of slakings are 4 hours then, normal temperature was placed after 24 hours again, and smooth surface is inviscid, and the hardness of the polyurethane elastomer that obtains is Shao Shi A 5.
For achieving the above object, another kind of super-low-hardness polyurethane elastomer provided by the invention, made by the raw material cast of following mass fraction: the mass ratio of A component and B component is 1: 0.8-1: 3, the mass ratio of B component and C component is 1: 0 to 1: 0.3, wherein:
The A component is a biphenyl methane diisocyanate prepolymer, and this prepolymer is that 2-3, number-average molecular weight are that the poly(propylene oxide) ethoxylated polyhydric alcohol of 1000-8000 is polymerized by diphenylmethanediisocyanate and modifier thereof and functionality;
The B component is 6000-10000 by number-average molecular weight, and functionality is 3 poly(propylene oxide) ethoxylated polyhydric alcohol, catalyzer and antiaging agent composition; Wherein catalyzer is one or both in dibutyl tin laurate, the stannous octoate, accounts for the 0.01-0.5% of B component total amount, and antiaging agent is 1010, among BHT, UV-531, the UV-328 one or more, accounts for the 0.01-0.5% of B component total amount;
The C component is that number-average molecular weight is the single alcohol of polymeric linear of 1000-4000.
The another kind of super-low-hardness polyurethane elastomer of the present invention, make by the raw material cast of following mass fraction:
The mass ratio of A component and B component is 1: 0.94, and the mass ratio of B component and C component is 1: 0.1, and wherein B is that component is the mixture of 3 functionality molecular weight, 7600 poly(propylene oxide) ethoxylated polyhydric alcohol Z-221 and dibutyl tin laurate, and mass ratio is 1000: 2; The C component is linear single pure D-2000 of molecular weight 2000.
Another kind of super-low-hardness method for preparing polyurethane elastic body provided by the invention, A component, B component, C component are deposited separately, and when producing, respectively at 110 ℃, dehydration is 4 hours under the-0.08MPa condition, is cooled to 53 ℃ with B component and C component.The A component is warming up to 55 ℃, join in the component C, mix, reacted ten minutes, the B component is joined in A, the C mixture again, mixing is poured in 50 ℃ of mold cavities the demoulding in 20 minutes rapidly, 80 ℃ of slakings are 4 hours then, normal temperature was placed after 24 hours again, and smooth surface is inviscid, and the hardness of the polyurethane elastomer that obtains is Shao Shi A 5.
For achieving the above object, the third super-low-hardness polyurethane elastomer provided by the invention, made by the raw material cast of following mass fraction: the mass ratio of A component and B component is 1: 0.8-1: 3, wherein:
The A component is a biphenyl methane diisocyanate prepolymer, and this prepolymer is that 2-3, number-average molecular weight are that the poly(propylene oxide) ethoxylated polyhydric alcohol of 1000-8000 is polymerized by diphenylmethanediisocyanate and modifier thereof and functionality;
The B component is 6000-10000 by number-average molecular weight, and functionality is 3 poly(propylene oxide) ethoxylated polyhydric alcohol, catalyzer and antiaging agent composition; Wherein catalyzer is one or both in dibutyl tin laurate, the stannous octoate, accounts for the 0.01-0.5% of B component total amount, and antiaging agent is 1010, among BHT, UV-531, the UV-328 one or more, accounts for the 0.01-0.5% of B component total amount.
The third super-low-hardness polyurethane elastomer of the present invention, raw material cast by following mass fraction is made: the mass ratio of A component and B component is 1: 1.9, wherein the B component is the mixture of 3 functionality molecular weight, 7600 poly(propylene oxide) ethoxylated polyhydric alcohol Z-221 and dibutyl tin laurate and 1010, and its mass ratio is 1000: 2: 1.
The third super-low-hardness method for preparing polyurethane elastic body provided by the invention, A component, B component are deposited separately, when producing, with the B component at 110 ℃, dehydration was cooled to room temperature after 4 hours under the-0.08MPa condition, got 31 gram A components and joined to mix rapidly in the 60 gram B components and be poured in the normal temperature mould self-vulcanizing demoulding in 2 minutes, the rear surface was little sticking in static 24 hours, and the hardness of the polyurethane elastomer that obtains is Shao Shi A 0.
Super-low-hardness polyurethane elastomer of the present invention since single alcohol in reaction system with isocyanate reaction, play the effect of chain termination, formed the less polyurethane oligomer of a part of molecular weight, with the polyurethane elastomer that forms the later infiltration that is interweaved, played the plastifying effect, this oligopolymer is bigger with respect to the plasticizer molecule amount of little branch, has similar molecular structure to polyurethane elastomer again, therefore, can reduce the hardness of polyurethane elastomer, again can be not elongated and precipitate into elastomeric surface along with the time.In addition, do not use micromolecular chainextender and linking agent.Super-low-hardness method for preparing polyurethane elastic body prescription provided by the invention is simple, makes easily the resulting product Environmental Safety, has comfort feel, good shock-absorbing capacity and anti-compression properties, durometer level between Shao Shi A 0-15, smooth surface or extremely low viscosity is arranged.
Embodiment
Super-low-hardness polyurethane elastomer of the present invention, the cast starting material are made of three kinds of components:
A component: constitute by in diphenylmethanediisocyanate and the prepolymer thereof any one.Prepolymer is 2-3 by diphenylmethanediisocyanate and modifier thereof and functionality, and number-average molecular weight is that the poly(propylene oxide) ethoxylated polyhydric alcohol of 1000-8000 is polymerized according to known method.
B component: form by polymer polyatomic alcohol, catalyzer and antiaging agent.Wherein polymer polyatomic alcohol is that number-average molecular weight is 6000 to 10000, and functionality is 3 poly(propylene oxide) ethoxylated polyhydric alcohol.Catalyzer is one or both in dibutyl tin laurate, the stannous octoate, accounts for the 0.01-0.5% of B component total amount.Antiaging agent one or more by 1010, among BHT, UV-531, the UV-328 are formed, and account for the 0.01-0.5% of B component total amount.
The C component: be made up of the single alcohol of polymeric linear, wherein the number-average molecular weight of single alcohol is 1000 to 4000.
The mass ratio of three kinds of components is:
When the A component is diphenylmethanediisocyanate and the B component mixed according to 1: 19 to 1: 27.
When the A component is prepolymer and the B component mix according to mass ratio 1: 0.8 to 1: 3;
The mass ratio of B component and C component is 1: 0 to 1: 0.3.
Its preparation method is: A component, B component, C component are deposited separately, and A component and C component are 45 ℃-60 ℃ in temperature when producing, pre-mixing 10-30 minute, add the B component again, mix rapidly and be poured in the mould, the demoulding in 1-20 minute, 80 ℃ of slakings 4 hours.The hardness of the polyurethane elastomer that obtains is Shao Shi A 0-16.
Further specify the technical scheme of super-low-hardness polyurethane elastomer its preparation method of the present invention below in conjunction with embodiment:
Embodiment 1:
The A component is a biphenyl methane diisocyanate prepolymer; B is that component is the mixture of 3 functionality molecular weight, 7600 poly(propylene oxide) ethoxylated polyhydric alcohol Z-221 and dibutyl tin laurate, and mass ratio is 1000: 2; The C component is linear single pure D-2000 of molecular weight 2000.
The mass ratio of A component and B component is 1: 0.94, gets 43 grams and 40.3 grams respectively, and the mass ratio of B component and C component is 1: 0.1, and the C component is got 4 grams.
Respectively at 110 ℃, dehydration is 4 hours under the-0.08MPa condition, is cooled to 60 ℃ with B component and C component.43 gram A components are warming up to 60 ℃, join in the 4 gram component C, mix, reacted ten minutes, again 40.3 gram B components are joined in A, the C mixture, mixing is poured in the mold cavity demoulding in 10 minutes rapidly, 80 ℃ of slakings are 4 hours then, normal temperature was placed after 24 hours again, and smooth surface is inviscid, hardness Shao Shi A 7.
Embodiment 2:
The A component is diphenylmethanediisocyanate MDI-100; The B component is the mixture of 3 functionality molecular weight, 7600 poly(propylene oxide) ethoxylated polyhydric alcohol Z-221,3 functionality molecular weight, 10000 poly(propylene oxide) ethoxylated polyhydric alcohol Z-3100 and dibutyl tin laurate and UV-531, and mass ratio is 1000: 1000: 3: 5; Linear single pure D-2000 of C component molecular weight 2000.
A component and B component blended mass ratio are 1: 22.1, get 1.81 grams and 40 grams respectively, and B component and C component blended mass ratio are 1: 0.1, and the C component is got 4 grams.
Respectively at 110 ℃, dehydration is 4 hours under the-0.08MPa condition, is cooled to 53 ℃ with B component and C component.1.81 gram A components are warming up to 55 ℃, join in the 4 gram component C, mix, reacted ten minutes, again 40 gram B components are joined in A, the C mixture, mixing is poured in 50 ℃ of mold cavities the demoulding in 20 minutes rapidly, 80 ℃ of slakings are 4 hours then, normal temperature was placed after 24 hours again, and smooth surface is inviscid, hardness Shao Shi A 5.
Embodiment 3:
The A component is a biphenyl methane diisocyanate prepolymer; The B component is the mixture of 3 functionality molecular weight, 7600 poly(propylene oxide) ethoxylated polyhydric alcohol Z-221 and dibutyl tin laurate and 1010, and its mass ratio is 1000: 2: 1.
The mass ratio of A component and B component is 1: 1.9, gets 31 grams and 60 grams respectively.
At 110 ℃, dehydration was cooled to room temperature after 4 hours under the-0.08MPa condition with the B component, got 31 gram A components and joined to mix rapidly in the 60 gram B components and be poured in the normal temperature mould, the self-vulcanizing demoulding in 2 minutes, the rear surface was little sticking in static 24 hours, and hardness Shao Shi A 0 is equivalent to Shao Shi C 6.
Super-low-hardness polyurethane elastomer of the present invention is made with single alcohol reaction by diphenylmethanediisocyanate and poly-epoxy propyl ether polyvalent alcohol, single alcohol in reaction system with isocyanate reaction, play the effect of chain termination, formed the less polyurethane oligomer of a part of molecular weight, with the polyurethane elastomer that forms the later infiltration that is interweaved, played the plastifying effect, this oligopolymer is bigger with respect to the plasticizer molecule amount of little branch, has similar molecular structure to polyurethane elastomer again, therefore, can reduce the hardness of polyurethane elastomer, again can be not elongated and precipitate into elastomeric surface along with the time.Another characteristics are not use micromolecular chainextender and linking agent in three components of reaction.Super-low-hardness method for preparing polyurethane elastic body prescription is simple, make easily, the resulting product Environmental Safety, has comfort feel, good shock-absorbing capacity and anti-compression properties, durometer level is between Shao Shi A 0-15, and smooth surface or extremely low viscosity is arranged is applicable to the goods such as buffering, spats, abrasionproof at positions such as making shoe-pad and flank, half sole, heel, bung, shoestring in shoe industry.
Above-described embodiment is described preferred implementation of the present invention; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; various distortion and improvement that the common engineering technical personnel in this area make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (9)
1. super-low-hardness polyurethane elastomer is characterized in that: the raw material cast by following mass fraction is made: the mass ratio of A component and B component is 1: 19-1: 27, and the mass ratio of B component and C component is 1: 0 to 1: 0.3, wherein:
The A component is a diphenylmethanediisocyanate;
The B component is 6000-10000 by number-average molecular weight, and functionality is 3 poly(propylene oxide) ethoxylated polyhydric alcohol, catalyzer and antiaging agent composition; Wherein catalyzer is one or both in dibutyl tin laurate, the stannous octoate, accounts for the 0.01-0.5% of B component total amount, and antiaging agent is 1010, among BHT, UV-531, the UV-328 one or more, accounts for the 0.01-0.5% of B component total amount;
The C component is that number-average molecular weight is the single alcohol of polymeric linear of 1000-4000.
2. according to the described super-low-hardness polyurethane elastomer of claim 1, it is characterized in that: the raw material cast by following mass fraction is made: A component and B component blended mass ratio are 1: 22.1, B component and C component blended mass ratio are 1: 0.1, wherein the B component is the mixture of 3 functionality molecular weight, 7600 poly(propylene oxide) ethoxylated polyhydric alcohol Z-221,3 functionality molecular weight, 10000 poly(propylene oxide) ethoxylated polyhydric alcohol Z-3100 and dibutyl tin laurate and UV-531, and mass ratio is 1000: 1000: 3: 5; Linear single pure D-2000 of C component molecular weight 2000.
3. according to claim 1 or 2 described super-low-hardness method for preparing polyurethane elastic body, it is characterized in that: A component, B component, C component are deposited separately, when producing, with B component and C component respectively at 110 ℃, dehydration is 4 hours under the-0.08MPa condition, is cooled to 53 ℃.The A component is warming up to 55 ℃, join in the component C, mix, reacted ten minutes, the B component is joined in A, the C mixture again, mixing is poured in 50 ℃ of mold cavities the demoulding in 20 minutes rapidly, 80 ℃ of slakings are 4 hours then, normal temperature was placed after 24 hours again, and smooth surface is inviscid, and the hardness of the polyurethane elastomer that obtains is Shao Shi A 5.
4. super-low-hardness polyurethane elastomer is characterized in that: the raw material cast by following mass fraction is made: the mass ratio of A component and B component is 1: 0.8-1: 3, and the mass ratio of B component and C component is 1: 0 to 1: 0.3, wherein:
The A component is a biphenyl methane diisocyanate prepolymer, and this prepolymer is that 2-3, number-average molecular weight are that the poly(propylene oxide) ethoxylated polyhydric alcohol of 1000-8000 is polymerized by diphenylmethanediisocyanate and modifier thereof and functionality;
The B component is 6000-10000 by number-average molecular weight, and functionality is 3 poly(propylene oxide) ethoxylated polyhydric alcohol, catalyzer and antiaging agent composition; Wherein catalyzer is one or both in dibutyl tin laurate, the stannous octoate, accounts for the 0.01-0.5% of B component total amount, and antiaging agent is 1010, among BHT, UV-531, the UV-328 one or more, accounts for the 0.01-0.5% of B component total amount;
The C component is that number-average molecular weight is the single alcohol of polymeric linear of 1000-4000.
5. according to the described super-low-hardness polyurethane elastomer of claim 4, it is characterized in that: the raw material cast by following mass fraction is made:
The mass ratio of A component and B component is 1: 0.94, and the mass ratio of B component and C component is 1: 0.1, and wherein B is that component is the mixture of 3 functionality molecular weight, 7600 poly(propylene oxide) ethoxylated polyhydric alcohol Z-221 and dibutyl tin laurate, and mass ratio is 1000: 2; The C component is linear single pure D-2000 of molecular weight 2000.
6. according to claim 4 or 5 described super-low-hardness method for preparing polyurethane elastic body, it is characterized in that: A component, B component, C component are deposited separately, when producing, with B component and C component respectively at 110 ℃, dehydration is 4 hours under the-0.08MPa condition, is cooled to 53 ℃.The A component is warming up to 55 ℃, join in the component C, mix, reacted ten minutes, the B component is joined in A, the C mixture again, mixing is poured in 50 ℃ of mold cavities the demoulding in 20 minutes rapidly, 80 ℃ of slakings are 4 hours then, normal temperature was placed after 24 hours again, and smooth surface is inviscid, and the hardness of the polyurethane elastomer that obtains is Shao Shi A 5.
7. super-low-hardness polyurethane elastomer is characterized in that: the raw material cast by following mass fraction is made: the mass ratio of A component and B component is 1: 0.8-1: 3, wherein:
The A component is a biphenyl methane diisocyanate prepolymer, and this prepolymer is that 2-3, number-average molecular weight are that the poly(propylene oxide) ethoxylated polyhydric alcohol of 1000-8000 is polymerized by diphenylmethanediisocyanate and modifier thereof and functionality;
The B component is 6000-10000 by number-average molecular weight, and functionality is 3 poly(propylene oxide) ethoxylated polyhydric alcohol, catalyzer and antiaging agent composition; Wherein catalyzer is one or both in dibutyl tin laurate, the stannous octoate, accounts for the 0.01-0.5% of B component total amount, and antiaging agent is 1010, among BHT, UV-531, the UV-328 one or more, accounts for the 0.01-0.5% of B component total amount.
8. according to the described super-low-hardness polyurethane elastomer of claim 7, it is characterized in that: the raw material cast by following mass fraction is made: the mass ratio of A component and B component is 1: 1.9, wherein the B component is the mixture of 3 functionality molecular weight, 7600 poly(propylene oxide) ethoxylated polyhydric alcohol Z-221 and dibutyl tin laurate and 1010, and its mass ratio is 1000: 2: 1.
9. according to claim 7 or 8 described super-low-hardness method for preparing polyurethane elastic body, it is characterized in that: A component, B component are deposited separately, when producing, with the B component at 110 ℃, dehydration was cooled to room temperature after 4 hours under the-0.08MPa condition, got 31 gram A components and joined to mix rapidly in the 60 gram B components and be poured in the normal temperature mould self-vulcanizing demoulding in 2 minutes, the rear surface was little sticking in static 24 hours, and the hardness of the polyurethane elastomer that obtains is Shao Shi A 0.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103694440A (en) * | 2013-12-14 | 2014-04-02 | 常熟市永利化工有限公司 | Low-hardness polyurethane elastomer material |
| CN104004157A (en) * | 2014-06-03 | 2014-08-27 | 奥斯汀新材料（张家港）有限公司 | Preparation method of soft thermoplastic polyurethane elastomers |
| CN108720170A (en) * | 2018-04-28 | 2018-11-02 | 东莞市顺风运动器材有限公司 | A kind of cool insole |
| CN110003429A (en) * | 2019-04-02 | 2019-07-12 | 百恩实业（深圳）有限公司 | A kind of soft, high-strength pouring type polyurethane elastomer and preparation method thereof |
| CN112876638A (en) * | 2021-01-08 | 2021-06-01 | 东莞市中森新材料有限公司 | Formula and production process of non-adhesive polyurethane elastomer |
-
2011
- 2011-01-17 CN CN2011100089384A patent/CN102120877A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103694440A (en) * | 2013-12-14 | 2014-04-02 | 常熟市永利化工有限公司 | Low-hardness polyurethane elastomer material |
| CN103694440B (en) * | 2013-12-14 | 2016-08-03 | 常熟市永利化工有限公司 | Low hardness polyurethane elastic body material |
| CN104004157A (en) * | 2014-06-03 | 2014-08-27 | 奥斯汀新材料（张家港）有限公司 | Preparation method of soft thermoplastic polyurethane elastomers |
| CN104004157B (en) * | 2014-06-03 | 2016-04-13 | 奥斯汀新材料（张家港）有限公司 | A kind of preparation method of soft thermoplastic polyurethane elastomers |
| CN108720170A (en) * | 2018-04-28 | 2018-11-02 | 东莞市顺风运动器材有限公司 | A kind of cool insole |
| CN110003429A (en) * | 2019-04-02 | 2019-07-12 | 百恩实业（深圳）有限公司 | A kind of soft, high-strength pouring type polyurethane elastomer and preparation method thereof |
| CN112876638A (en) * | 2021-01-08 | 2021-06-01 | 东莞市中森新材料有限公司 | Formula and production process of non-adhesive polyurethane elastomer |
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Application publication date: 20110713 |