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Low-density and high-hardness polyurethane synthetic material

A technology of synthetic materials and high hardness, which is applied in the field of low-density and high-hardness polyurethane synthetic materials, which can solve the problems of high weight of polyurethane materials and difficult balance between weight and hardness, and achieve the effect of high hardness, strength and low density

Inactive Publication Date: 2018-05-22
苏州浩洋聚氨酯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, polyurethane materials with higher hardness generally have higher weight, and it is difficult to achieve a balance between weight and hardness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A low-density high-hardness polyurethane synthetic material, made of the following raw materials in parts by mass:

[0021] 80 parts of isocyanate,

[0022] 80 parts of mixed polyols,

[0023] 50 parts of mixed catalyst,

[0024] 8 parts of dibenzoyl peroxide,

[0025] 5 parts of dimethylurea,

[0026] 5 parts of curing agent,

[0027] 2 parts of expandable phenolic resin,

[0028] The mixed polyol is mixed by polyether polyol and polymer polyol in 1:1;

[0029] The mixed catalyst is mixed with bis(dimethylaminoethyl)ether and dipropylene glycol.

[0030] Wherein, the sodium isocyanate is a 1:1 mixture of diphenylmethane diisocyanate and polymethylene polyphenylisocyanate.

[0031] The hydroxyl value of the polyether polyol is 400 mgKOH / g, and the relative molecular weight is 1200; the hydroxyl value of the polymer polyol is 20 mgKOH / g, and the relative molecular weight is 700.

[0032] The bis(dimethylaminoethyl)ether and dipropylene glycol are mixed in a mass ...

Embodiment 2

[0035] A low-density high-hardness polyurethane synthetic material, made of the following raw materials in parts by mass:

[0036] 100 parts of isocyanate,

[0037] 100 parts of mixed polyols,

[0038] 80 parts of mixed catalyst,

[0039] 10 parts of dibenzoyl peroxide,

[0040] 10 parts of dimethylurea,

[0041] 10 parts of curing agent,

[0042] 4 parts of expandable phenolic resin,

[0043] The mixed polyol is mixed by polyether polyol and polymer polyol in 1:2;

[0044] The mixed catalyst is mixed with bis(dimethylaminoethyl)ether and dipropylene glycol.

[0045] Wherein, the sodium isocyanate is a mixture of diphenylmethane diisocyanate and polymethylene polyphenylisocyanate at a ratio of 1:2.

[0046] The hydroxyl value of the polyether polyol is 450 mgKOH / g, and the relative molecular weight is 2000; the hydroxyl value of the polymer polyol is 28 mgKOH / g, and the relative molecular weight is 1200.

[0047] The bis(dimethylaminoethyl)ether and dipropylene glycol ...

Embodiment 3

[0050] A low-density high-hardness polyurethane synthetic material, made of the following raw materials in parts by mass:

[0051] 90 parts of isocyanate,

[0052] 90 parts of mixed polyols,

[0053] 65 parts of mixed catalyst,

[0054] 9 parts of dibenzoyl peroxide,

[0055] 7 parts of dimethylurea,

[0056] 7 parts of curing agent,

[0057] 3 parts of expandable phenolic resin,

[0058] The mixed polyol is mixed by polyether polyol and polymer polyol in a ratio of 1:1.5;

[0059] The mixed catalyst is mixed with bis(dimethylaminoethyl)ether and dipropylene glycol.

[0060] Wherein, the sodium isocyanate is a mixture of diphenylmethane diisocyanate and polymethylene polyphenylisocyanate at a ratio of 1:1.5.

[0061] The hydroxyl value of the polyether polyol is 420 mgKOH / g, and the relative molecular weight is 1600; the hydroxyl value of the polymer polyol is 24 mgKOH / g, and the relative molecular weight is 1000.

[0062] The bis(dimethylaminoethyl)ether and dipropyle...

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Abstract

The invention discloses a low-density and high-hardness polyurethane synthetic material which is prepared from the following raw materials in parts by mass: 80 to 100 parts of isocyanate, 80 to 100 parts of mixed polyhydric alcohol, 50 to 80 parts of a mixed catalyst, 8 to 10 parts of dibenzoyl peroxide, 5 to 10 parts of dimethylurea, 5 to 10 parts of a curing agent and 2 to 4 parts of expandablephenolic resin. The mixed polyhydric alcohol is obtained by mixing polyether polyol with polymer polyol according to the ratio of 1 to 1-2; the mixed catalyst is obtained by mixing di(dimethylamino ethyl) ether and dipropylene glycol. The low-density and high-hardness polyurethane synthetic material disclosed by the invention has the properties of small density and high hardness at the same time and can be widely applied to the field of light instruments and equipment, and prepared instruments and equipment are low in mass and high in hardness.

Description

technical field [0001] The invention relates to a synthetic material, in particular to a low-density high-hardness polyurethane synthetic material. Background technique [0002] Due to its unique structure and performance, polyurethane polymer materials are highly designable, relatively dense, wear-resistant, water-resistant, adjustable in softness and hardness, elastic and shock-absorbing, etc., and can be widely used in various It has important research value and broad application prospects. In the prior art, polyurethane materials with higher hardness generally have higher weight, and it is difficult to achieve a balance between weight and hardness. Contents of the invention [0003] Purpose of the invention: The purpose of the invention is to provide a polyurethane synthetic material with low density and high hardness. [0004] Technical solution: The low-density high-hardness polyurethane synthetic material of the present invention is made of the following raw mater...

Claims

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Application Information

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IPC IPC(8): C08G18/40C08G18/63C08G18/48C08G18/18
CPCC08G18/4072C08G18/1833C08G18/48C08G18/632
Inventor 周建颜玉荣
Owner 苏州浩洋聚氨酯科技有限公司