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Low-shrinkage thermoplastic polyurethane elastomer and preparation method thereof

A thermoplastic polyurethane, low shrinkage technology, applied in the field of polymer materials, can solve the problems of reduced shrinkage, reduced shrinkage of polyurethane materials, etc., and achieve the effect of low shrinkage, good mechanical properties, and reduced shrinkage

Active Publication Date: 2021-02-09
DONGGUAN JIXIN POLYMER SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its shrinkage rate still needs to be further reduced, and it cannot bring the reduction of shrinkage rate to polyurethane materials.

Method used

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  • Low-shrinkage thermoplastic polyurethane elastomer and preparation method thereof
  • Low-shrinkage thermoplastic polyurethane elastomer and preparation method thereof
  • Low-shrinkage thermoplastic polyurethane elastomer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] In this embodiment, a low-shrinkage thermoplastic polyurethane elastomer is provided. The raw materials for the preparation of the low-shrinkage thermoplastic polyurethane elastomer include the following components in terms of weight percentage:

[0039]

[0040] Among them, the TPU particles are polyether-type TPU particles (BASF 1185A), the polypropylene is the copolymerized polypropylene K9026 produced by Yanshan Petrochemical, and the melt flow rate is 30g / 10min under the test conditions of 230°C and 2.16kg. The melt flow rate under the test conditions of ℃ and 2.16kg is 20g / 10min; the calcium salt whisker is calcium sulfate whisker, the aspect ratio is 40, the particle size is 7 microns, and the length of glass fiber is 10-13mm; The oxygen agent is Antioxidant 1010.

[0041] The preparation method comprises the following steps:

[0042] (1) Mix TPU particles, polypropylene, polyethylene and antioxidant at a rotating speed of 800r / min for 10min, and add them to ...

Embodiment 2

[0045] In this embodiment, a low-shrinkage thermoplastic polyurethane elastomer is provided. The raw materials for the preparation of the low-shrinkage thermoplastic polyurethane elastomer include the following components in terms of weight percentage:

[0046]

[0047] Among them, the TPU particles are polyether-type TPU particles (BASF 1185A), the polypropylene is the copolymerized polypropylene K9026 produced by Yanshan Petrochemical, and the melt flow rate is 30g / 10min under the test conditions of 230°C and 2.16kg. The melt flow rate under the test conditions of ℃ and 2.16kg is 30g / 10min; the calcium salt whiskers are calcium sulfate whiskers, the aspect ratio is 50, the particle size is 8 microns, and the length of the glass fiber is 5-8mm; The oxygen agent is antioxidant 3114.

[0048] The preparation method comprises the following steps:

[0049] (1) Mix TPU particles, polypropylene, polyethylene and antioxidant at a rotating speed of 600r / min for 20min, and add the...

Embodiment 3

[0052] In this embodiment, a low-shrinkage thermoplastic polyurethane elastomer is provided. The raw materials for the preparation of the low-shrinkage thermoplastic polyurethane elastomer include the following components in terms of weight percentage:

[0053]

[0054] Among them, the TPU particles are polyether-type TPU particles (BASF 1185A), the polypropylene is the copolymerized polypropylene K9026 produced by Yanshan Petrochemical, and the melt flow rate is 30g / 10min under the test conditions of 230°C and 2.16kg. The melt flow rate under the test conditions of ℃ and 2.16kg is 30g / 10min; the calcium salt whisker is calcium sulfate whisker, the aspect ratio is 45, the particle size is 6 microns, and the length of the glass fiber is 25-28mm; The oxygen agent is antioxidant 3114.

[0055] The preparation method comprises the following steps:

[0056] (1) Mix TPU particles, polypropylene, polyethylene and antioxidant at a rotating speed of 1000r / min for 10min, and add the...

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Abstract

The invention provides a low-shrinkage thermoplastic polyurethane elastomer and a preparation method thereof. The low-shrinkage thermoplastic polyurethane elastomer is prepared from, by weight, 60%-80% of TPU particles, 10-20% of polypropylene, 5-10% of polyethylene, 1-5% of calcium salt whiskers, 1-5% of glass fibers and 0.5-2% of an antioxidant. The thermoplastic polyurethane elastomer providedby the invention has a low shrinkage rate of 0.5% or less, also has good mechanical properties, and is suitable for a plurality of fields of automobiles, household appliances, electrical instruments,mechanical industry and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a low-shrinkage thermoplastic polyurethane elastomer and a preparation method thereof. Background technique [0002] Polyurethane materials have application value in many fields such as automobiles, household appliances, electrical instruments, machinery industry, etc., but at present, its easy warping and large shrinkage rate limit its application to a certain extent. Therefore, the preparation of materials with low shrinkage is the focus of research in this field. [0003] CN101759934A discloses a high-fluidity, high-toughness, low-shrinkage filling modified polypropylene material, which is prepared from the following raw materials in weight percentage: 45-80% polypropylene, 5-18% powdered polyethylene, 8% inorganic filler ~25%, calcium salt whisker 5~12%, antioxidant 0.1-1%, other additives 0-2%, the advantage of this invention is: 1, the present invention has obvious...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L23/14C08L23/06C08K7/14C08K7/08
CPCC08L75/08C08L2207/04C08L2205/03C08K2201/004C08K2201/016C08L23/14C08L23/06C08K7/14C08K7/08
Inventor 何建雄杨博
Owner DONGGUAN JIXIN POLYMER SCI & TECH
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