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Polyurethane granules and preparation technology thereof

A technology for polyurethane granules and a preparation process, which is applied to the field of polyurethane granules and its preparation technology, can solve the problems of cold resistance, elasticity, transparency, flexural resistance and anti-slip properties that do not meet the requirements for use and product design, and achieves reasonable preparation process design. , high transparency, high cold resistance effect

Inactive Publication Date: 2018-03-20
钱卫萍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the improvement of living standards, people have higher and higher requirements for products. The cold resistance, elasticity, t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Polyurethane granular material, its raw material components include by weight parts:

[0046] Diphenylmethane diisocyanate 7860 parts

[0047] 1,4-butanediol 2200 parts

[0048] Adipic acid polyester polyol 11500 parts,

[0049] The adipate-based polyester polyol is polyethylene adipate glycol triol with a molecular weight of 1910.

[0050] The preparation process of polyurethane granules includes the following steps: S1: Take the corresponding raw materials according to the weight ratio, and set them aside.

[0051] S2: Put 1,4-butanediol in the reactor, set the temperature at 60°C, and keep it warm for 45-75min; place diphenylmethane diisocyanate in the reactor, set the temperature at 75°C, and keep it warm for 45-75min; The adipic acid-based polyester polyol is placed in the reaction kettle, the temperature is set at 135°C, and the temperature is kept for 60 minutes; if the reaction temperature is not enough, the transparency of the product cannot meet the standar...

Embodiment 2

[0057] Polyurethane granular material, its raw material components include by weight parts:

[0058] Diphenylmethane diisocyanate 5560 parts

[0059] 1,4-butanediol 1500 parts

[0060] Adipic acid-based polyester polyol 10,000 parts,

[0061] The adipate-based polyester polyol is polyethylene adipate glycol triol with a molecular weight of 2040.

[0062] The preparation process of polyurethane granules includes the following steps: S1: Take the corresponding raw materials according to the weight ratio, and set them aside.

[0063]S2: Put 1,4-butanediol in the reaction kettle, set the temperature at 60°C, and keep it warm for 60 minutes; place diphenylmethane diisocyanate in the reaction kettle, set the temperature at 70°C, and keep it warm for 60 minutes; The polyester polyol is placed in the reaction kettle, the temperature is set at 85°C, and the temperature is kept for 60 minutes; if the reaction temperature is not enough, the cold resistance of the product cannot meet t...

Embodiment 3

[0069] Polyurethane granular material, its raw material components include by weight parts:

[0070] Diphenylmethane diisocyanate 11333 parts

[0071] 1,4-butanediol 3500 parts

[0072] Adipic acid polyester polyol 10000 parts,

[0073] The adipate polyester polyol is polyethylene adipate glycol triol with a molecular weight of 2020.

[0074] The preparation process of polyurethane granules includes the following steps: S1: Take the corresponding raw materials according to the weight ratio, and set them aside.

[0075] S2: Put 1,4-butanediol in the reaction kettle, set the temperature at 30°C, and keep it warm for 60 minutes; place diphenylmethane diisocyanate in the reaction kettle, set the temperature at 40°C, and keep it warm for 60 minutes; The acid-based polyester polyol is placed in the reaction kettle, the temperature is set at 140°C, and the temperature is kept for 60 minutes; if the reaction temperature is not enough, the product cannot fully react.

[0076] S3: I...

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PUM

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Abstract

The invention discloses polyurethane granules, raw materials of which comprise the following ingredients (by weight): 5400-12000 parts of methyl diphenylene diisocyanate, 1450-3350 parts of 1,4-butylene glycol and 9860-11500 parts of adipic acid polyester polyols. The adipic acid polyester polyols is polyethylene glycol adipate triol, and the molecular weight is 1910-2040. The formula and the preparation technology are designed reasonably; and cold resistance, elasticity, transparency, bending resistance and skid resistance of the product accord with product requirements and can meet high standards of products in the present society.

Description

technical field [0001] The invention relates to the field of TPU production, in particular to a polyurethane granular material and a preparation process thereof. Background technique [0002] With the improvement of living standards, people have higher and higher requirements for clothing, shoes and hats, especially women's pursuit of beauty, which has promoted the innovation and development of products and materials in the clothing, shoes and hats industry, so there are garden shoes. The production of this kind of shoes requires the upper to be transparent and cover the entire instep, so the requirements for comfort are also high. In terms of materials, it is required that the hardness of the TPU material should not be too high, and it must be properly transparent. Due to the large product area, the requirements for the molding of the material are also high due to the consideration of output. [0003] TPU is thermoplastic polyurethane elastomer rubber, which has the advant...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G18/32A43B13/04
CPCC08G18/7671A43B13/04C08G18/3206C08G18/4238C08G18/664
Inventor 钱卫萍
Owner 钱卫萍