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Polyurethane resin composition and preparation method and application thereof

A technology of polyurethane resin and composition, which is applied in the field of polyurethane and can solve problems such as the inability to realize TPR shoe sole injection molding

Active Publication Date: 2021-04-30
SHANGHAI HUIDE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shoe leather prepared by the invention has excellent air and moisture permeability, good scratch and wear resistance, smooth surface and good hand feeling, but it cannot be injection molded with TPR sole

Method used

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  • Polyurethane resin composition and preparation method and application thereof
  • Polyurethane resin composition and preparation method and application thereof
  • Polyurethane resin composition and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] In this embodiment, a polyurethane resin composition is provided, the polyurethane resin composition includes a first composition and a second composition, and the first composition includes the following components in weight percentage:

[0057]

[0058] The second composition comprises the following components by weight percentage:

[0059]

[0060] The preparation method comprises the following steps:

[0061] (1) Preparation of the first composition: HDPOL-8320, 1,4-butanediol, 2-butyl-2-ethyl-1,3-propanediol, N,N-dimethylformamide and part of toluene Mix evenly, cool down to 58°C, add part of diphenylmethane-4,4'-diisocyanate to start the reaction, the reaction solid content is 40%, the molar ratio of isocyanate group and hydroxyl group in the reaction solution is 0.95, heat up to 70°C , react until the hydrogen peroxide test does not turn yellow; add part of diphenylmethane-4,4'-diisocyanate, so that the molar ratio of isocyanate group and hydroxyl group in...

Embodiment 2

[0064] In this embodiment, a polyurethane resin composition is provided, the polyurethane resin composition includes a first composition and a second composition, and the first composition includes the following components in weight percentage:

[0065]

[0066]

[0067] The second composition comprises the following components by weight percentage:

[0068]

[0069] The preparation method comprises the following steps:

[0070] (1) Preparation of the first composition: HDPOL-8320, 1,4-butanediol, 2-butyl-2-ethyl-1,3-propanediol, N,N-dimethylformamide and part of toluene Mix evenly, cool down to 60°C, add part of diphenylmethane-4,4'-diisocyanate to start the reaction, the reaction solid content is 40%, the molar ratio of isocyanate group and hydroxyl group in the reaction solution is 0.95, heat up to 75°C , react until the hydrogen peroxide test does not turn yellow; add part of diphenylmethane-4,4'-diisocyanate, so that the molar ratio of isocyanate group and hydro...

Embodiment 3

[0073] In this embodiment, a polyurethane resin composition is provided, the polyurethane resin composition includes a first composition and a second composition, and the first composition includes the following components in weight percentage:

[0074]

[0075] The second composition comprises the following components by weight percentage:

[0076]

[0077]

[0078] The preparation method comprises the following steps:

[0079] (1) Preparation of the first composition: HDPOL-8330, 1,4-butanediol, 2-butyl-2-ethyl-1,3-propanediol, N,N-dimethylformamide and part of toluene Mix evenly, cool down to 55°C, add part of diphenylmethane-4,4'-diisocyanate to start the reaction, the reaction solid content is 40%, the molar ratio of isocyanate group and hydroxyl group in the reaction solution is 0.95, heat up to 73°C , react until the hydrogen peroxide test does not turn yellow; add part of diphenylmethane-4,4'-diisocyanate, so that the molar ratio of isocyanate group and hydro...

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Abstract

The invention provides a polyurethane resin composition and a preparation method and application thereof, the polyurethane resin composition comprises a first composition and a second composition, the first composition comprises the following components in percentage by weight: 11.5-12.1% of polyester polyol, 2.3-3.6% of micromolecular dihydric alcohol, and 8-8.5% of diphenylmethane-4, 4-diisocyanate, 70% of a solvent and 6.9-7% of a styrene-butadiene-styrene block copolymer; and the second composition is prepared from the following components in percentage by weight: 12-14% of polyester polyol, 2.3-3.4% of micromolecular dihydric alcohol, 7.5-8.5% of diphenylmethane-4, 4'-diisocyanate, 70% of a solvent and 4.9-7% of liquid nitrile rubber. Compared with conventional polyurethane resin, the polarity of the polyurethane resin composition is reduced, injection molding of the polyurethane resin composition and TPR can be achieved, and the polyurethane resin composition is suitable for the field of shoe leather materials.

Description

technical field [0001] The invention belongs to the technical field of polyurethane and relates to a polyurethane resin composition and its preparation method and application, in particular to a polyurethane resin composition for TPR injection molding and its preparation method and application. Background technique [0002] TPR (Thermo-Plastic-Rubber) material is a thermoplastic rubber material. It is a kind of thermoplastic soft rubber that has rubber elasticity and does not need to be vulcanized. It can be directly processed and formed (such as injection molding, extrusion, blow molding, etc.). TPR material is a thermoplastic styrene-butadiene rubber-based raw material, which is blended and modified by adding resin, filler, plasticizer oil and other functional additives. [0003] TPR sole is a new type of thermoplastic rubber environmental protection material mixed with styrene-butadiene-styrene block copolymer (SBS) as the base material. It has both the performance of rub...

Claims

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Application Information

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IPC IPC(8): C08L75/06C08L53/02C08L9/02C08G18/66C08G18/42C08G18/32A43B23/02
CPCC08L75/06C08G18/664C08G18/4238C08G18/3206A43B23/0215A43B23/0235C08L53/02C08L9/02
Inventor 郭海英钱建中钱洪祥却靖邹寒卞如虎
Owner SHANGHAI HUIDE TECH CO LTD
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