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Soft thermoplastic polyurethane elastomer and preparation method thereof

一种热塑性聚氨酯、增塑剂的技术，应用在热塑性聚氨酯弹性体领域，能够解决方法昂贵、TPU机械特性不足等问题

Active Publication Date: 2021-11-02
BASF SE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason is that the method is too expensive or the mechanical properties of said TPU are not enough to be able to survive in the market

Method used

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  • Soft thermoplastic polyurethane elastomer and preparation method thereof
  • Soft thermoplastic polyurethane elastomer and preparation method thereof
  • Soft thermoplastic polyurethane elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The number average molar mass obtained from 229.18g 4,4'-MDI, 35.18g ethylene glycol and 1000g from adipic acid and ethylene glycol and 1,4-butanediol is 3.0×10 3 g / mol polyester polyol (PEBA) was processed in a reactive extruder to synthesize TPU with a 1:1 molar ratio of ethylene glycol to 1,4-butanediol. In addition, 8 g of hydrolysis stabilizer (oligomeric carbodiimide obtained from tetramethylxylene diisocyanate (TMXDI), e.g. Elastostab H01 from BASF), 2.54 g of antioxidant (from tetramethylxylene and poly Glycol-derived hindered phenol, eg Irganox 1010 from BASF) and 3.82 g lubricant (montanic acid based ester wax, eg Licowax E from Clariant). The prepared TPU pellets were transformed into test samples by injection molding.

Embodiment 2

[0051] The number average molar mass obtained from 184.15g 4,4'-MDI, 24.01g ethylene glycol and 1000g from adipic acid and ethylene glycol and 1,4-butanediol is 3.0×10 3 g / mol polyester polyol (PEBA) was processed in a reactive extruder to synthesize TPU with a 1:1 molar ratio of ethylene glycol to 1,4-butanediol. In addition, 8 g of hydrolytic stabilizer (oligomeric carbodiimide obtained from TMXDI, e.g. Elastostab H01 from BASF), 2.43 g of antioxidant (hindered phenol obtained from tetramethylxylene and polyethylene glycol, e.g. Irganox 1010 from BASF) and 6.08 g of lubricant (montanic acid based ester wax, eg Licowax E from Clariant). The prepared TPU pellets were transformed into test samples by injection molding.

Embodiment 3

[0053] The number average molar mass obtained from 163g 4,4'-MDI, 18.79g ethylene glycol and 1000g from adipic acid and ethylene glycol and 1,4-butanediol is 3.0×10 3 g / mol polyester polyol (PEBA) was processed in a reactive extruder to synthesize TPU with a 1:1 molar ratio of ethylene glycol to 1,4-butanediol. In addition, 8 g of hydrolytic stabilizer (oligomeric carbodiimide obtained from TMXDI, e.g. Elastostab H01 from BASF), 2.38 g of antioxidant (hindered phenol obtained from tetramethylxylene and polyethylene glycol, e.g. Irganox 1010 from BASF) and 5.95 g lubricant (montanic acid based ester wax, eg Licowax E from Clariant). The prepared TPU pellets were transformed into test samples by injection molding.

[0054] The mechanical test results of the samples prepared in Examples 1 to 3 are shown in Table 1.

[0055] Table 1

[0056]

[0057] The samples prepared by Examples 1 to 3 could be easily removed from the mold during processing by injection molding. As can ...

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Abstract

The present invention discloses a thermoplastic polyurethane substantially free of plasticizers and having a Shore A hardness of 60 or less, prepared by one-step polymerization of the following components: i) a linear polyol, ii) an organic diisocyanate and iii ) a glycol chain extender mainly comprising ethylene glycol and / or 1,3-propylene glycol; wherein the number average molecular weight of the linear polyol (i) is 1.5×10 3 g / mol to 5.0×10 3 g / mol range. The thermoplastic polyurethane of the present invention can be easily prepared by conventional manufacturing methods, and the thermoplastic polyurethane thus prepared can be molded into articles in a practical processing cycle. In addition, the thermoplastic polyurethane article has low shrinkage, has good low-temperature properties and good mechanical properties, and does not substantially harden at low temperatures.

Description

technical field [0001] The present invention relates to a one-step process for the preparation of very soft thermoplastic polyurethane elastomers (TPU) substantially free of plasticizers and having a Shore A hardness of 60 or less, and which can be processed in practical The cycle is molded into TPU products. Background technique [0002] Thermoplastic polyurethane elastomers (TPU) have been known for a long time. They are important industrially because they combine the well-known advantages of good mechanical properties and inexpensive thermoplastic processability. A wide range of mechanical properties can be achieved by using various chemical constituents. A review of TPUs, their properties and uses is described eg in Kunststoffe 68 (1978), 819 or Kautschuk, Gummi, Kunststoffe 35 (1982), 568. [0003] TPU is usually composed of polyol (usually polyester polyol or polyether polyol), diisocyanate (usually organic diisocyanate) and short chain diol (chain extender). The h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/76C08G18/02C08G18/42C08L75/06
CPCC08G18/025C08G18/4238C08G18/664C08G18/765C08G18/7671C08K5/005C08L75/00C08L75/06C08L91/06C08G18/3206C08G18/3221C08G18/7685
Inventor D·尹宾-埃里克·陈野村晃林土典光
Owner BASF SE