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Polyurethane elastomer and preparation method thereof

A technology of polyurethane elastomer and prepolymer, applied in the field of polyurethane elastomer and its preparation, to achieve the effect of good high temperature resistance and good dynamic stability

Inactive Publication Date: 2016-07-27
苏州绿朗工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 4,4'-bibenzyl diisocyanate (DBDI) has both the rigidity of diphenylmethane diisocyanate (PPDI) and the flexibility of dimethyl biphenyl diisocyanate (TODI), and the elastomer made of it has excellent high temperature resistance Because of PPDI, the flexibility is higher than that of TODI. At present, there is no polyurethane elastomer industrial product made of DBDI in the world. The emergence of DBDI will inevitably promote the progress of the world industry.

Method used

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  • Polyurethane elastomer and preparation method thereof
  • Polyurethane elastomer and preparation method thereof
  • Polyurethane elastomer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Add 1000g of polybutylene adipate with a molecular weight of 2000 to Reactor No. 1, slowly heat up to 100°C, then add 15g of antioxidant 1330, 2g of diluent, 3g of flame retardant, and 2g of catalyst, and then proceed for 15 minutes Stir evenly at high speed, then slowly raise the temperature to 110°C, add 520g of 4,4'dibenzyl diisocyanate, and defoam at -0.5~-0.2Mpa for 2 hours to obtain a prepolymer.

[0025] Add 165g of 1,4-butanediol into the No. 2 reactor, heat to 100°C, dehydrate at -0.5~-0.2Mpa for 2 hours, then mix and pour the raw materials in the two reactors at 135°C Put it into a stainless steel plate coated with a release agent, put it in a blast oven at 120°C for 50 minutes to release the mold, and continue to put it in the oven for 20 hours, then take it out and crush it for granulation, and then you can get a high-resilience thermoplastic polyurethane elastomer. Material.

Embodiment 2

[0027] Add 1000g of polycaprolactone with a molecular weight of 2000 to No. 1 reaction kettle, slowly heat up to 110°C, then add 15g of antioxidant 1330, 2g of diluent, 3g of filler, 2g of catalyst, and then carry out 15 minutes of high-speed stirring, and then Slowly raise the temperature to 110°C, add 480g of 4,4'dibenzyl diisocyanate, and dehydrate at -0.5~-0.2Mpa for 2 hours to obtain a prepolymer.

[0028] Add 148g of 1,6-hexanediol into the No. 2 reactor, heat to 100°C, dehydrate at -0.5~-0.2Mpa for 2 hours, then mix and pour the raw materials in the two reactors at 135°C Put it into a stainless steel plate coated with a release agent, put it in a blast oven at 110°C for 1 hour, and then release the mold. After continuing to put it in the oven for 20 hours, take it out, crush it and granulate it, and then you can make a high-resilience thermoplastic polyurethane elastomer. Material.

Embodiment 3

[0030] Add 1000g of 3000 molecular weight polycaprolactone in No. 1 reactor, slowly heat up to 100°C, then add 15g of antioxidant 1330, 2g of diluent, 5g of anti-ultraviolet additive, 2g of catalyst, and then carry out 15 minutes of high-speed stirring, Then slowly raise the temperature to 110°C, add 535g of 4,4'dibenzyl diisocyanate, and dehydrate at -0.5~-0.2Mpa for 2 hours to obtain a prepolymer.

[0031] Add 176g of 1,6-hexanediol into the No. 2 reactor, heat to 100°C, dehydrate at -0.5~-0.2Mpa for 2 hours, then mix and pour the raw materials in the two reactors at 135°C Put it into a stainless steel plate coated with a release agent, put it in a blast oven at 130°C for 40 minutes, and then release the mold. After continuing to put it in the oven for 20 hours, take it out and granulate it, and then you can get a high resilience thermoplastic polyurethane. body material.

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Abstract

The invention discloses a polyurethane elastomer and a preparation method thereof. The polyurethane elastomer is prepared from components in parts by weight as follows: 100 parts of diol, 5-60 parts of diisocyanate, 5-30 parts of a chain extender, 0.01-0.5 parts of a catalyst, 0.01-2 parts of an antioxidant and 0.01-5 parts of other adjuvants. The polyurethane elastomer has excellent high-temperature resistance and dynamic stability and can be applied to the field of high dynamic fatigue bearing and high-temperature working environments such as metallurgy, sealing rings, rollers, automobiles, planes and the like.

Description

technical field [0001] The invention specifically relates to a polyurethane elastomer and a preparation method thereof. Background technique [0002] Polyurethane elastomers are widely used in mechanical hydraulic transmission systems, seals in pneumatic systems and automotive seals because of their wide hardness range, good mechanical properties, resilience properties, wear resistance, oil resistance, and aging resistance. In some special fields, there are more stringent requirements: such as high mechanical strength, high temperature resistance, oil resistance and wear resistance, good dynamic mechanical properties, etc. 4,4' dibenzyl diisocyanate (DBDI) molecules can form the most perfect phase separation due to the perfect structural symmetry and spin, so that the polyurethane elastomer can achieve the best high temperature resistance and mechanical strength, making the material both Rigidity and flexibility, both rigidity and flexibility, make its elastomer have excell...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G18/32C08G18/10C08K5/13C08G18/44
CPCC08G18/7657C08G18/10C08G18/3206C08G18/4238C08G18/4277C08G18/44C08G18/664C08K5/13
Inventor 朱勇健
Owner 苏州绿朗工程技术有限公司
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