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Anti-precipitation aliphatic thermoplastic polyurethane elastomer and preparation method thereof

A thermoplastic polyurethane and aliphatic technology, which is applied in the field of anti-separation aliphatic thermoplastic polyurethane elastomer and its preparation, can solve the problems of increasing the molecular weight and length of the chain extender, reducing the physical properties of the final product, and increasing the cost of the chain extender. Precipitation problem, improve the effect of precipitation

Active Publication Date: 2018-09-21
MIRACLL CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this patent can improve the precipitation problem, the complexity of the chain extender will increase the cost. On the other hand, increasing the molecular weight and length of the chain extender will also reduce the physical properties of the final product

Method used

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  • Anti-precipitation aliphatic thermoplastic polyurethane elastomer and preparation method thereof
  • Anti-precipitation aliphatic thermoplastic polyurethane elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The raw materials are PTMG1000 (polytetrahydrofuran ether glycol, molecular weight 1000), HD I (hexamethylene diisocyanate) and BDO (1,4-butanediol), the molar ratio of HDI and PTMG1000 is 1.8:1, and the R value Set to 1.02 (R value is the molar ratio of isocyanate group to hydroxyl), and the hard segment content is set to 30% (the hard segment content is the total mass of isocyanate and chain extender in the total mass of isocyanate, chain extender and polyol The ratio), dibutyltin dilaurate dosage is 0.03%, antioxidant 1010 (tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester) is 0.15%, Antioxidant 264 (2,6-di-tert-butyl-p-cresol) is 0.1%, 2-(2'-hydroxy-3'-5'-di-tert-amylphenyl) benzotriazole is 0.3%, Polyethylene wax is 0.15%. Combine PTMG1000 with dibutyltin dilaurate, antioxidant 1010, antioxidant 264, 2-(2'-hydroxy-3'-5'-di-tert-amylphenyl) benzo The triazole was mixed uniformly to obtain the mixture, which was vacuum dehydrated at 110°...

Embodiment 2

[0033] The raw materials are PCL2000 (polycaprolactone diol, molecular weight 2000), HDI (hexamethylene diisocyanate), BDO (1,4-butanediol), HMDI (dicyclohexylmethane diisocyanate) HDI and HMDI The molar ratio is 4:1, the molar ratio of diisocyanate (HDI, HMDI) to PCL2000 is 1.8:1, the R value is set to 1.02, the hard segment content is set to 30%, and the amount of dibutyltin dilaurate is 0.03% , Antioxidant 1010 (tetra [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester) is 0.15%, antioxidant 264 (2,6-di-tert-butyl pair Cresol) is 0.1%, polyethylene wax is 0.15%, PCL2000 and dibutyltin dilaurate, antioxidant 1010, antioxidant 264 are mixed uniformly to obtain the mixture, vacuum dehydration at 110 ℃ for 3h; pass the casting machine The above mixture is mixed with HD I and HMD I and then injected into the first pouring port of the twin-screw reactive extruder, and BDO is injected into the second pouring port (the seventh zone), and the temperature of e...

Embodiment 3

[0035] The raw materials are PCL2000 (polycaprolactone diol, molecular weight 2000), HD I (hexamethylene diisocyanate), BDO (1,4-butanediol) and MPO (1,3-butanediol), HD The molar ratio of I and PCL2000 is 1.8:1, the mass ratio of BDO to MPO is 4:1, the R value is set to 1.02, the hard segment content is set to 30%, the amount of dibutyltin dilaurate is 0.03%, and the Oxygen agent 1010 (tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester) is 0.15%, antioxidant 264 (2,6-di-tert-butyl-p-cresol ) Is 0.1%, 2-(2'-hydroxy-3'-5'-di-tert-amylphenyl) benzotriazole is 0.3%, polyethylene wax is 0.15%, and PCL2000 is combined with dibutyltin dilaurate , Antioxidant 1010, Antioxidant 264, 2-(2'-hydroxy-3'-5'-di-tert-amylphenyl) benzotriazole are mixed uniformly to obtain the mixture, and vacuum dehydration at 110℃ for 3h; The above mixture is mixed with HD I through a casting machine and then injected into the first pouring port of the twin-screw reactive extr...

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Abstract

The invention belongs to the field of chemical materials, and particularly relates to an anti-precipitation aliphatic thermoplastic polyurethane elastomer and a preparation method thereof. The anti-precipitation aliphatic thermoplastic polyurethane elastomer comprises a component A, a component B, a component C and a component D, wherein the component A is an aliphatic diisocyanate component whichcomprises a mixture of 50-100mol% of hexamethylene diisocyanate and 0-50mol% of a mixture of aliphatic and / or alicyclic and / or aromatic diisocyanates except hexamethylene diisocyanate; the componentB is a chain extender component which comprises a mixture of 50-100mol% of 1,4-butanediol and 0-50mol% of a mixture of at least one chain extender other than 1,4-butanediol; the component C is at least one polyol component; and the component D is at least one of a catalyst, an antioxidant, a light stabilizer, a lubricant, a hydrolysis-resistant agent and a flame retardant. The method provided by the invention is simple, a product obtained by the method can effectively improve a precipitation problem, and the mechanical property of the product is excellent.

Description

Technical field [0001] The invention belongs to the field of chemical materials, and particularly relates to an anti-precipitation aliphatic thermoplastic polyurethane elastomer and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is a block type linear macromolecule, which is mainly composed of hard segments formed by the reaction of diisocyanate and small molecule chain extenders and soft segments formed by the reaction of diisocyanate and oligomer polyol . Ordinary aromatic thermoplastic polyurethane elastomers will have obvious yellowing after ultraviolet irradiation due to their special benzene ring structure, while aliphatic thermoplastic polyurethane elastomers will not be affected by this, so it is also called never yellowing TPU . Aliphatic thermoplastic polyurethane elastomer has broad application prospects in the fields of automobile body protective film, automobile interior parts, leather, sheath, and electronic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/32
CPCC08G18/3206C08G18/4277C08G18/4854C08G18/664C08G18/6674
Inventor 刘建文宋红玮王仁鸿张生由可锦
Owner MIRACLL CHEM
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