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Biological-type thermoplastic polyurethane elastomer and preparation method thereof

A thermoplastic polyurethane, bio-based technology, applied in the field of polyurethane materials, can solve the problems of polyurethane performance improvement without further research, and achieve the effects of excellent hydrolysis resistance and molding performance, high crystallization rate, and good hydrolysis resistance.

Active Publication Date: 2019-03-08
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this patent only discloses that bio-based isocyanate can be used to prepare polyurethane, and no further research has been done on the performance improvement of the prepared polyurethane

Method used

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  • Biological-type thermoplastic polyurethane elastomer and preparation method thereof
  • Biological-type thermoplastic polyurethane elastomer and preparation method thereof
  • Biological-type thermoplastic polyurethane elastomer and preparation method thereof

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preparation example Construction

[0034]Preparation of bio-based thermoplastic polyurethane elastomers:

[0035] The bio-based raw material information involved in the embodiments of the present invention is as follows:

[0036] Bio-based polyester polyols:

[0037] Bio-based succinic acid, purchased from BioAmber company;

[0038] Bio-based sebacic acid was purchased from Hebei Kaide Biomaterials Co., Ltd.

[0039] Bio-based 1,3-propanediol was purchased from DuPont.

[0040] Preparation of bio-based poly(1,3-propylene glycol succinate):

[0041] Add bio-based succinic acid and bio-based 1,3-propanediol in a molar ratio of 1:1.2 into a reaction kettle with a fractionation tower and a distillation receiver, and heat up to 180°C for reaction. When the acid value drops to 15mg KOH / g , evacuate to below 100pa, raise the temperature to 200°C to continue the reaction, stop the reaction when the acid value is less than 1.5mg KOH / g, and the hydroxyl value reaches the predetermined value. A hydroxyl value of 56 m...

Embodiment 1

[0055] 67 wt% PPSu (bio-based polypropylene succinate), 16.7 wt% MDI (4,4-diphenylmethane diisocyanate), 7 wt% BDI (bio-based 1, 4-butylene diisocyanate), 9.29wt% PDO (bio-based 1,3-propanediol), 0.01wt% bismuth isooctanoate were mixed evenly, and then extruded through twin-screw reaction (extruder temperature 160 ° C) to obtain bio-based thermoplastic polyurethane elastomer.

Embodiment 2

[0057] 41.5 wt% PPSu (bio-based polypropylene succinate) with a molecular weight of 1000 g / mol, 25.48 wt% MDI (4,4-diphenylmethane diisocyanate), 14.01 wt% BDI (bio-based 1,4-butylene diisocyanate), 19wt% PDO (bio-based 1,3-propanediol), 0.01wt% bismuth isooctanoate, mixed evenly, and then extruded through twin-screw reaction (extruder temperature 180°C) to obtain bio-based Thermoplastic polyurethane elastomer.

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Abstract

The invention discloses a biological-type thermoplastic polyurethane elastomer and a preparation method thereof. The biological-type thermoplastic polyurethane elastomer is high in biological base content, and excellent in comprehensive performance, and composition thereof is as follows: a) 30-95 wt% of a polyhydric alcohol component, wherein a number-average molecular weight of the polyhydric alcohol is 800-6000 g / mol, and the polyhydric alcohol contains 50-100 wt% of biological base polyester polyhydric alcohol; b) 0-25 wt% of a chain extender component, wherein the chain extender contains 50-100 wt% of a biological base chain extender; c) 5-45 wt% of a diisocyanate component, wherein the diisocyanate contains 10-60 wt% of biological base diisocyanate; and d) 0.001-0.1 wt% of a catalystcomponent, wherein the catalyst contains 50-100 wt% of a non-tin-ring environment-friendly catalyst. Total content of the biological bases of the components a)-c) is greater than or equal to 50 wt%. The thermoplastic polyurethane elastomer can be prepared by using a one-step method, an intermittent method or a prepolymer method.

Description

technical field [0001] The invention relates to the field of polyurethane materials, in particular to a method for preparing thermoplastic polyurethane elastomers using bio-based raw materials. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is a kind of polyurethane elastomer that can be plasticized by heating and can be dissolved by solvent. It has high modulus, high strength, high elongation and high elasticity, excellent wear resistance, oil resistance, low temperature resistance and aging resistance. performance. According to the processing technology, it is divided into melt processing and solution processing. According to the product use, it can be divided into mechanical parts, pipes, films, adhesives, coatings and fibers. [0003] The main body of thermoplastic polyurethane elastomer is composed of three components: isocyanate, polyol and chain extender, and the raw materials are all derived from fossil resources. However, with the continu...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/42C08G18/32
CPCC08G18/4238C08G18/6607
Inventor 杨磊黄岐善
Owner WANHUA CHEM GRP CO LTD
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