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High-transparency and low-shrinkage thermoplastic polyurethane elastomer and preparation method thereof

A technology of thermoplastic polyurethane and low shrinkage, applied in the field of thermoplastic polyurethane, can solve problems such as appearance impact, achieve the effect of simplifying the production process, achieving high consistency and low shrinkage

Inactive Publication Date: 2019-12-13
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of fillers will have a greater impact on the plasticizing reaction during processing or the appearance of the final product

Method used

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  • High-transparency and low-shrinkage thermoplastic polyurethane elastomer and preparation method thereof
  • High-transparency and low-shrinkage thermoplastic polyurethane elastomer and preparation method thereof
  • High-transparency and low-shrinkage thermoplastic polyurethane elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The high transparency and low shrinkage thermoplastic polyurethane elastomer is made of the following raw materials in mass percentage:

[0031]

[0032] Described polyester diol molecular weight is 3000.

[0033] The polyester diol is composed of dibasic acid and dibasic alcohol. A (terephthalic acid component) / B (adipic acid) in the dibasic acid component is 5% / 95%. The diol component is 1,4-butanediol.

[0034] Preparation process: Polyester diol, 1010, DY-20, Tinuvin 783 are mixed and heated to 140±10°C, fully mixed; MDI-100 is heated to 50±5°C; MPO is heated to 50±5°C; after heating The raw materials are injected into the conveyor belt through the high-speed mixing head after being accurately measured, and the materials are fully matured during the process of the conveyor belt passing through the drying tunnel. The TPU sheets that pass through the drying tunnel are broken by a pulverizer, and the TPU chips are sent to the twin-screw extruder, and the final pr...

Embodiment 2

[0036] The high transparency and low shrinkage thermoplastic polyurethane elastomer is made of the following raw materials in mass percentage:

[0037]

[0038] Described polyester diol molecular weight is 2000.

[0039] The polyester diol is composed of dibasic acid and dibasic alcohol. A (terephthalic acid component) / B (adipic acid) in the dibasic acid component is 7% / 93%. The diol component is a mixture of ethylene glycol and 1,4-butanediol, and the mixing ratio is 1:1.

[0040] Preparation process: Polyester diol, 1010, DY-20, Tinuvin 783 are mixed and heated to 140±10°C, mixed well; HDI is heated to 50±5°C; PDO is heated to 50±5°C; the heated raw materials After accurate metering, it is poured into the conveyor belt through the high-speed mixing head, and the material is fully matured when the conveyor belt passes through the drying tunnel. The TPU sheets that pass through the drying tunnel are broken by a pulverizer, and the TPU chips are sent to the twin-screw ext...

Embodiment 3

[0042] The high transparency and low shrinkage thermoplastic polyurethane elastomer is made of the following raw materials in mass percentage:

[0043]

[0044] Described polyester diol molecular weight is 1000.

[0045] The polyester diol is composed of dibasic acid and dibasic alcohol. A (terephthalic acid component) / B (adipic acid) in the dibasic acid component is 10% / 90%. The diol component is a mixture of ethylene glycol and 1,2-propylene glycol, and the mixing ratio is 1:1.

[0046] Preparation process: Polyester diol, 626, TPT, Tinuvin 783 are mixed and heated to 140±10°C, fully mixed; MDI-100 is heated to 50±5°C; MPO is heated to 50±5°C; the heated raw materials After accurate metering, it is poured into the conveyor belt through the high-speed mixing head, and the material is fully matured when the conveyor belt passes through the drying tunnel. The TPU sheets that pass through the drying tunnel are broken by a pulverizer, and the TPU chips are sent to the twin-...

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Abstract

The invention relates to a high-transparency and low-shrinkage thermoplastic polyurethane elastomer and a preparation method thereof and belongs to the technical field of thermoplastic polyurethane. The high-transparency and low-shrinkage thermoplastic polyurethane elastomer comprises raw materials in percentage by mass as follows: 48%-70% of polyester diol, 25%-40% of diisocyanate, 3%-13% of a chain extender, 0.1%-0.3% of an antioxidant, 0.1%-0.8% of a light stabilizer and 0.008%-0.03% of a catalyst. The high-transparency and low-shrinkage thermoplastic polyurethane elastomer has lower shrinkage and higher transparency. The invention also provides the simple and easy preparation method.

Description

technical field [0001] The invention relates to a high-transparency and low-shrinkage thermoplastic polyurethane elastomer and a preparation method thereof, belonging to the technical field of thermoplastic polyurethane. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) has been widely used in many fields because of its high strength, high wear resistance, wide range of hardness, and wide processing temperature. During the injection molding process of TPU materials, the size of the product shrinks due to the crystallization of the soft and hard segment phases and microphase separation. For the processing of large-sized products, the shrinkage is more obvious, which directly affects the application of products, and greatly limits the application and development of TPU in the field of high-precision size requirements. [0003] At present, the way to achieve low shrinkage of TPU materials is mainly by adding fillers. Fillers are mainly divided into inorg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/32
CPCC08G18/4216C08G18/664
Inventor 陈淑海张玉瑞陈海良刘凯良
Owner SHANDONG INOV POLYURETHANE
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