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A kind of thermoplastic polyester elastomer and foam

A thermoplastic polyester and elastomer technology, applied in the field of thermoplastic elastomer foaming, can solve the problems of large pores, open pores or uneven pore diameters, achieve a balance between tensile strength and low melting point, facilitate foaming processing, and improve melt The effect of intensity

Active Publication Date: 2022-03-22
唐靖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of large pores, open pores or uneven pore sizes in the foaming of existing thermoplastic polyester elastomers, the present invention provides a thermoplastic polyester elastomer, a foaming precursor and a foamed body

Method used

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  • A kind of thermoplastic polyester elastomer and foam
  • A kind of thermoplastic polyester elastomer and foam
  • A kind of thermoplastic polyester elastomer and foam

Examples

Experimental program
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preparation example Construction

[0058] Another embodiment of the present invention provides the preparation method of the thermoplastic polyester elastomer as described above, comprising the following steps:

[0059] A reaction mixture is obtained by mixing dicarboxylic acid or dimethyl ester of aromatic group or tetrahydrofuran group, polyalcohol with 3 to 6 carbons, soft segment monomer and prepolymer monomer, and the prepolymer monomer is composed of It is obtained by polymerization of aromatic monomers with vinyl groups and acrylate monomers;

[0060] The reaction mixture first undergoes esterification reaction or transesterification reaction, and then undergoes polycondensation reaction to obtain thermoplastic polyester elastomer.

[0061] The preparation method of thermoplastic polyester elastomer provided by the present invention uses the prepolymer monomer obtained by polymerization of aromatic monomers with vinyl groups and acrylate monomers as one of the raw materials, and two Carboxylic acid or d...

Embodiment 1

[0094] This embodiment is used to illustrate the thermoplastic polyester elastomer, thermoplastic polyester elastomer foam and preparation method thereof disclosed in the present invention, including the following steps:

[0095] Add 17.5KG of butyl acetate into a 100L reactor, raise the temperature to 120°C, and drop a mixed solution of 1.125KG tert-butyl peroxybenzoate, 16.7KG styrene and 0.8KG methyl methacrylate from a metering pump, 2.5 The hour dropwise addition was completed. After the dropwise addition was completed, the reaction was continued at 120° C. for 4 hours. A PA intermediate of random copolymerization of styrene-methyl methacrylate was obtained. The solid content was 50.1%, the viscosity was 1150 cps, and the number average molecular weight was 2160.

[0096] Add 7.33KG of butylene glycol, 12.1KG of dimethyl terephthalate, 10.5KG of polytetrahydrofuran diol, 2.7KG of PA intermediate, and 12.5g of tetrabutyl titanate as a catalyst in a 100L reactor , antioxi...

Embodiment 2

[0099] This embodiment is used to illustrate the thermoplastic polyester elastomer, thermoplastic polyester elastomer foam and preparation method thereof disclosed in the present invention, including most of the operating steps in Example 1, the difference being:

[0100] The amount of PA intermediate was changed from 2.7KG to 5.4KG.

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Abstract

In order to overcome the problems of large pores, open pores or uneven pore diameters in existing thermoplastic polyester elastomer foaming, the present invention provides a thermoplastic polyester elastomer comprising the following segments: Segment 1: Polyester hard segment ; Segment 2: polyether soft segment and / or polyester soft segment; Segment 3: the general structure is as follows: wherein, R 4 selected from aromatic groups; R 5 One or more selected from H, straight-chain alkyl groups with 1-6 carbons and branched-chain alkyl groups with 1-6 carbons, the value of m is 5-30, and the value of n is 2-10 . At the same time, the invention also discloses a foam comprising the above-mentioned thermoplastic polyester elastomer. The thermoplastic polyester elastomer provided by the invention is especially suitable for the technical field of foaming, and the prepared foamed particle has uniform hole size and no opening and coalescing holes.

Description

technical field [0001] The invention belongs to the technical field of thermoplastic elastomer foaming, and in particular relates to a thermoplastic polyester elastomer and a foam. Background technique [0002] Thermoplastic polyester elastomer (TPEE) is a kind of linear block copolymer containing polyester hard segment and aliphatic polyester or polyether soft segment. It has both the excellent elasticity of rubber and the ease of processing of thermoplastics. The degree is adjustable. The rigidity, polarity and crystallinity of the hard segment of TPEE make it have outstanding strength and good high temperature resistance, creep resistance, solvent resistance and impact resistance, and the low glass transition temperature and saturation of the soft segment polyether It has excellent low temperature resistance and aging resistance. It is mainly used in fields requiring shock absorption, impact resistance, flex resistance, sealing and elasticity, oil resistance, chemical r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/672C08J9/12
CPCC08G63/672C08J9/122C08J2367/00C08J2203/06C08J2203/08
Inventor 朱经纬唐靖黄光燕
Owner 唐靖
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