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Fluorine-silicon thermoplastic polyurethane elastomer and preparation method thereof

A thermoplastic polyurethane and elastomer technology, applied in the field of elastomer materials, can solve problems such as the inability to obtain high molecular weight materials, the inability to effectively highlight the characteristics of silicone, and the low mechanical properties of materials, and achieve high surface migration efficiency, excellent hydrophobicity and Low temperature resistance performance, obvious effect of activity

Active Publication Date: 2020-05-15
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, this arrangement of organic silicon makes the molecular weight of the product low, making it impossible to obtain high molecular weight materials, resulting in low mechanical properties of the material; can't stand out effectively

Method used

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  • Fluorine-silicon thermoplastic polyurethane elastomer and preparation method thereof
  • Fluorine-silicon thermoplastic polyurethane elastomer and preparation method thereof
  • Fluorine-silicon thermoplastic polyurethane elastomer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Raw materials for preparing fluorosilicone type thermoplastic polyurethane elastomers, based on 100 parts by total weight, include:

[0050] a) diisocyanate: diphenylmethane diisocyanate, 35 parts;

[0051] b) silicon-containing reactant: 6 parts, structural formula (I), wherein n is 10, Q 1 and Q 2 for -CH 3 , X is

[0052] c) fluorine-containing reactant: 4 parts, structural formula (II), wherein m is 20;

[0053] d) macromolecular diol reactant: polytetrahydrofuran diol, number average molecular weight is 1000g / mol; 50 parts;

[0054] e) Chain extender: ethylene glycol, 5 parts.

[0055] The preparation method comprises the following steps:

[0056] 1) At a temperature of 100°C, add a mixture of macromolecular diol reactants and part of small molecule reactants to the diisocyanate, and wait until the reaction is complete to obtain NCO-terminated prepolymer I with an NCO content of 8.1 wt%. ;

[0057] 2), at the same temperature as step 1), separately and si...

Embodiment 2

[0136] Raw materials for preparing fluorosilicone type thermoplastic polyurethane elastomers, based on 100 parts by total weight, include:

[0137] a) diisocyanate: hexamethylene diisocyanate, 24 parts;

[0138] b) silicon-containing reactant: 12 parts, structural formula (I), wherein n is 25, Q 1 and Q 2 for -CH 3 , X is

[0139] c) Fluorine-containing reactant: 1 part, structural formula (II), wherein m is 10;

[0140] d) macromolecular diol reactant: polybutylene adipate diol, number average molecular weight is 4000g / mol; 58 parts;

[0141] e) Chain extender: 1,4-butanediol, 5 parts.

[0142] The preparation method comprises the following steps:

[0143] 1), at a temperature of 110° C., first add a mixture of macromolecular diol reactants and part of small molecule reactants to the diisocyanate, and wait until the reaction is complete to obtain NCO-terminated prepolymer I with an NCO content of 6 wt %;

[0144] 2), at the same temperature as step 1), separately and...

Embodiment 3

[0149] Raw materials for preparing fluorosilicone type thermoplastic polyurethane elastomers, based on 100 parts by total weight, include:

[0150] a) Diisocyanate: 1,4-cyclohexane diisocyanate, 40 parts;

[0151] b) silicon-containing reactant: 7 parts, structural formula (I), wherein n is 5, Q 1 and Q 2 for X is

[0152] c) fluorine-containing reactant: 10 parts, structural formula (II), wherein m is 60;

[0153] d) Macromolecular diol reactant: polycarbonate diol, number average molecular weight is 1500g / mol; 33 parts;

[0154] e) Chain extender: 1,4-cyclohexanediol, 10 parts.

[0155] The preparation method comprises the following steps:

[0156] 1), at a temperature of 140° C., first add a mixture of macromolecular diol reactants and part of small molecule reactants to the diisocyanate, and wait until the reaction is complete to obtain NCO-terminated prepolymer I, with an NCO content of 4 wt %;

[0157] 2), at the same temperature as in step 1), separate and sim...

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Abstract

The invention provides a fluorine-silicon thermoplastic polyurethane elastomer and preparation method thereof. The prepared fluorine-silicon type thermoplastic polyurethane elastomer has the characteristics of outstanding mechanical property, surface property, low temperature property and the like. The preparation method comprises the following steps: 1) mixing diisocyanate with a macromolecular diol reactant and part of a chain extender, and reacting to obtain an NCO-terminated prepolymer I; (2) adding a fluorine-containing reactant and a silicon-containing reactant into the prepolymer I obtained in the step (1) for reaction, and separating and simultaneously and continuously feeding the fluorine-containing reactant and the silicon-containing reactant to obtain an NCO-terminated prepolymer II; and 3) mixing the remaining chain extender with the prepolymer II obtained in the step 2) and reacting to obtain the fluoro-silicon thermoplastic polyurethane elastomer.

Description

technical field [0001] The invention belongs to the field of elastomer materials, and further relates to a fluorosilicone type thermoplastic polyurethane elastomer and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is a polymer synthetic material with excellent comprehensive properties. It has excellent mechanical properties of high strength, high elasticity, high wear resistance and high flexibility, and is resistant to oil, solvents and chemicals. There are many varieties of TPU materials such as films, pipes, shoe materials, wires, cables, sheets, etc., so it can be widely used in various fields. Despite this, the surface properties of TPU are not satisfactory. The surface polarity of the material is high, the surface energy is large, and the hydrophobicity is not good. In addition, the low temperature resistance of TPU needs to be further improved. These factors lead to the application of TPU in related fields. res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/73C08G18/75C08G18/66C08G18/61C08G18/48C08G18/50C08G18/42C08G18/44C08G18/12C08G18/32
CPCC08G18/7671C08G18/73C08G18/751C08G18/755C08G18/7642C08G18/7614C08G18/4854C08G18/6674C08G18/12C08G18/4238C08G18/664C08G18/44C08G18/61C08G18/5015C08G18/3206C08G18/3215
Inventor 周明杨杰黄岐善
Owner WANHUA CHEM GRP CO LTD
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