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A kind of microporous polyurethane material

A polyurethane material and microporous technology, applied in the field of polyurethane materials, can solve the problems of compression ratio, impact resistance, sealing performance and insufficient resilience, etc., and achieve good slow rebound performance, good impact resistance and sealing performance, and high compression than the effect

Active Publication Date: 2018-09-25
HUBEI XIANGYUAN NEW MATERIAL TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of insufficient compression ratio, impact resistance, sealing performance and resilience in the prior art, and provide a microporous polyurethane material that can effectively improve the compression ratio, impact resistance, sealing performance and resilience

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A microporous polyurethane material, the raw material composition and weight ratio of the material are: isocyanate 20, polyether polyol 70, water 1, stabilizer 0.7, catalyst 0.01, chain extender 5, wherein the isocyanate is Diphenylmethane diisocyanate, described polyether polyol is mixed by polyether polyol A, polyether polyol B, polyether polyol C respectively by percentage content 45%, 30%, 25%, described polyether polyol Ether polyol A is SK Y-1030 polyether polyol, the polyether polyol B is POP3628 polyether polyol, the polyether polyol C is polypropylene glycol PPG3000 polyether polyol, and the stabilizer is silicone oil , the catalyst is triethylenediamine, and the water is ion-exchanged water.

[0026] When preparing, follow the steps below:

[0027] Step 1. Mix polyether polyol, water, stabilizer, catalyst, and chain extender according to the required ratio at 40-70°C and 15-30 MPa for 15-30 minutes with high precision to obtain a mixture;

[0028] Step 2. Fi...

Embodiment 2

[0030] Step is with embodiment 1, and difference is:

[0031] The raw material composition and weight ratio of the material are: isocyanate 50, polyether polyol 90, water 5, stabilizer 2, catalyst 0.05, chain extender 15, the polyether polyol A, polyether polyol B , and the percentage content of polyether polyol C are 65%, 10%, and 25% respectively, and the catalyst is dibutyltin dilaurate.

Embodiment 3

[0033] Step is with embodiment 1, and difference is:

[0034] The raw material composition and weight ratio of the material are: isocyanate 35, polyether polyol 80, water 3, stabilizer 1.5, catalyst 0.03, chain extender 10, the polyether polyol A, polyether polyol B 1. The percentage content of polyether polyol C is 45%, 50%, 5% respectively, the catalyst is stannous octoate, and the water is distilled water.

[0035] The cell diameter of the ultra-thin polyurethane product obtained in the above examples is 70-120um, and the distribution is uniform. The 50% compression load is below 0.025Mpa, and the 75% compression load is below 0.4Mpa. The compression force deflection test is carried out on it, and the result It shows that the pressure on the product when compressed to 10% of the thickness is not more than 0.1N / mm 2 , the compression set at 25°C is not more than 3% (compressed by 50% at 25°C and kept for 22 hours), and at the same time, the product can retain at least 90% o...

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PUM

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Abstract

A microporous PU (polyurethane) material is prepared from raw materials in parts by weight as follows: 20-50 parts of isocyanate, 70-90 parts of polyether polyol, 1-5 parts of water, 0.7-2 parts of a stabilizer, 0.01-0.05 parts of a catalyst and 5-15 parts of a chain extender, wherein polyether polyol is formed by mixing 45%-65% of polyether polyol A, 10%-50% of polyether polyol B and 5%-25% of polyether polyol C in percentage, polyether polyol A is trifunctional polyether polyol with the hydroxyl value ranging from 250 to 350, polyether polyol B is trifunctional polyether polyol with the hydroxyl value ranging from 25 to 80, and polyether polyol C is bifunctional polyether polyol with the hydroxyl value ranging from 25 to 80. The microporous PU material has the high compression ratio as well as good shock resistance, sealing performance and slow resilience, and products are ultrathin.

Description

technical field [0001] The invention belongs to the field of polyurethane materials, and in particular relates to a microporous polyurethane material. Background technique [0002] Microcellular polyurethane foam, commonly known as Poron foam in the market, was first created by Rogers Corporation of the United States and is mainly used in handheld devices such as mobile phones. With the rapid popularization of mobile phones, microcellular polyurethane foam has been widely used. [0003] At present, the foam products on the market have large cells, which are visible to the naked eye, so that they do not have high compression ratio, low compression load deformation, good resilience and other properties. [0004] Chinese patent: the application publication number is CN104987702A, and the invention patent application publication date is October 21, 2015 discloses a polyurethane foam, the polyurethane foam is formed by polymerization of component A and component B, and component...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08J9/08
CPCC08G18/4812C08G18/4825C08G2190/00C08G2110/0083
Inventor 魏琼郭可锐安健鑫
Owner HUBEI XIANGYUAN NEW MATERIAL TECH INC
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