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A kind of branched thermoplastic silicone polyurethane elastomer and preparation method thereof

A polyurethane elastomer and reactive silicone technology, which is applied in the field of branched thermoplastic silicone polyurethane elastomer and its preparation, can solve the problems of inability to process thermoplastics, and achieve smooth touch, excellent hydrophobic properties, and good mechanical properties Effect

Active Publication Date: 2021-12-14
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Chinese patent CN104086740A discloses a method for preparing silicone graft-modified polyurethane resin for synthetic leather, which introduces a polyether siloxane for the purpose of obtaining the smooth feel and high Gloss and permanent retention of coating surface properties obtained from cross-linked polymers that cannot be thermoplastically processed
[0008] The preparation of a branched thermoplastic silicone polyurethane elastomer with a molecular side chain containing a PDMS structure has not been reported yet.

Method used

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  • A kind of branched thermoplastic silicone polyurethane elastomer and preparation method thereof
  • A kind of branched thermoplastic silicone polyurethane elastomer and preparation method thereof
  • A kind of branched thermoplastic silicone polyurethane elastomer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Prepare the raw material of branched chain type thermoplastic silicone polyurethane elastomer, be 100 parts by total weight:

[0034] 1) diisocyanate: diphenylmethane diisocyanate, 33 parts;

[0035] 2) Single-end reactive silicone macromolecule (X-22-2713, Shin-Etsu Chemical Co., Ltd.): 6 parts;

[0036]

[0037] where Q 1 and Q 2 for -CH 3 , n is 2, X is;

[0038] 3) Other macromolecular compounds containing active hydrogen: poly-1,6-hexanediol terephthalate, with an average molecular weight of 1000 g / mol, 54 parts;

[0039] 4) Small molecule chain extender: ethylene glycol, 7 parts;

[0040] The preparation method comprises the following steps:

[0041] Ⅰ. Mix single-end reactive silicone macromolecules, other macromolecular compounds containing active hydrogen, and small molecule chain extenders to obtain a uniform prepolymerization mixture;

[0042] II. At 100°C, add diisocyanate to the prepolymerization mixture obtained in step I, make it evenly mixed,...

Embodiment 2

[0064] Prepare the raw material of branched chain type thermoplastic silicone polyurethane elastomer, be 100 parts by total weight:

[0065] 1) diisocyanate: dicyclohexylmethane diisocyanate, 25 parts;

[0066] 2) Single-end reactive silicone macromolecule (X-22-2489, Shin-Etsu Chemical Co., Ltd.): 1 part;

[0067]

[0068] where Q 1 and Q 2 for -CH 3 , n is 20, X is

[0069] 3) Other macromolecular compounds containing active hydrogen: polycarbonate-1,6-hexanediol, with an average molecular weight of 2500g / mol, 68 parts;

[0070] 4) Small molecule chain extender: diethylene glycol, 6 parts;

[0071] The preparation method comprises the following steps:

[0072] Ⅰ. Mix single-terminal reactive silicone macromolecules, other macromolecular compounds containing active hydrogen, and small molecular chain extenders to obtain a uniform prepolymerization mixture;

[0073] II. At 80°C, add the diisocyanate into the prepolymerization mixture obtained in step I, make it eve...

Embodiment 3

[0076] Prepare the raw material of branched chain type thermoplastic silicone polyurethane elastomer, be 100 parts by total weight:

[0077] 1) Diisocyanate: isophorone diisocyanate, toluene diisocyanate, 40 parts, and the weight ratio of isophorone diisocyanate and toluene diisocyanate is 1:1;

[0078] 2) Single-end reactive silicone macromolecule (X-22-3275, Shin-Etsu Chemical Co., Ltd.): 18 parts;

[0079]

[0080] where Q 1 and Q 2 for -CH 3 , n is 50, X is

[0081] 3) Other macromolecular compounds containing active hydrogen: polytetrahydrofuran diol, with an average molecular weight of 600 g / mol, 37 parts;

[0082] 4) Small molecule chain extender: 1,6-hexanediol, 5 parts;

[0083] The preparation method comprises the following steps:

[0084] Ⅰ. Mix single-terminal reactive silicone macromolecules, other macromolecular compounds containing active hydrogen, and small molecular chain extenders to obtain a uniform prepolymerization mixture;

[0085] II. At 60°C...

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Abstract

The invention discloses a branched thermoplastic silicone polyurethane elastomer and a preparation method thereof. Molecular compound, small molecule chain extender, and prepared according to the following method: Ⅰ. Mix the single-terminal reactive silicone macromolecule, other macromolecular compounds containing active hydrogen, and small molecule chain extender to obtain a uniform Pre-polymerization mixed solution; II. At a temperature of 60-120°C, add diisocyanate into the pre-polymerized mixed solution obtained in step I, make it evenly mixed, react and pour and mature. The branched thermoplastic silicone polyurethane elastomer not only has good physical and mechanical properties, but also has excellent hydrophobic properties, smooth touch, good low temperature resistance and the like.

Description

technical field [0001] The invention belongs to the field of elastomer materials, and further relates to a branched thermoplastic organosilicon polyurethane elastomer and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is a comprehensive material composed of thermodynamically incompatible soft and hard segments with excellent properties such as high strength, high toughness, and high elasticity. It is widely used in various industries. [0003] Organosilicon is a general term for many polymer compounds containing silicon, among which polyorganosiloxane is the most widely used, polyorganosiloxane has good thermal stability, oxidation resistance, good water repellency, and low glass transition temperature, low surface energy, excellent physiological inertia. Polydimethylsiloxane (PDMS) is the most common polyorganosiloxane, and there are many studies on introducing PDMS into TPU to make silicon-containing TPU. In the exi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/61C08G18/42C08G18/44C08G18/32C08G18/48
CPCC08G18/3206C08G18/4009C08G18/4018C08G18/4202C08G18/4213C08G18/4277C08G18/44C08G18/4825C08G18/4854C08G18/61C08G18/6607C08G18/664C08G18/6674
Inventor 周明杨杰黄岐善
Owner WANHUA CHEM GRP CO LTD