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A kind of polyurethane self-skinning foam and preparation method thereof

A self-skinning and polyurethane technology, applied in the field of polymer materials, can solve the problems of poor performance of polyurethane self-skinning foam and the pollution of foaming agents, and achieve the effect of improving the appearance and physical properties of the foam, improving the performance, and improving the thickness of the skin.

Active Publication Date: 2022-04-05
上海抚佳精细化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved in the present invention is to overcome the serious pollution of using HCFC-141b blowing agent in the prior art, and the poor defect of the polyurethane self-skin foam formed, thereby providing a kind of polyurethane self-skin foam and its Preparation

Method used

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  • A kind of polyurethane self-skinning foam and preparation method thereof
  • A kind of polyurethane self-skinning foam and preparation method thereof
  • A kind of polyurethane self-skinning foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The present embodiment provides a kind of polyurethane self-skinning foam, and its preparation method is as follows:

[0045] (1) Weigh PO / EO copolyether polyols, polymer polyols, crosslinking agents, surfactants, water, blowing agents, amine catalysts, organometallic catalysts and colorants according to the mass in the table below , mix, stir evenly, then adjust the temperature of the raw material to 22°C, weigh the MDI isocyanate according to the mass in the following table, preheat to 22°C, add it to the above mixture, stir evenly to obtain the mixture.

[0046] (2) Pour the mixture prepared in step (1) into a metal mold with a temperature of 30°C, control the overfill coefficient to 70%, close the mold and lock it with a clamp, mature for 3 minutes, open the mold, and machine the skin of the product Piercing, trimming, that is.

[0047]

[0048]

Embodiment 2

[0050] The present embodiment provides a kind of polyurethane self-skinning foam, and its preparation method is as follows:

[0051] (1) Weigh PO / EO copolyether polyol, crosslinking agent, surfactant, water, foaming agent, amine catalyst, organometallic catalyst and color paste according to the quality in the table below, mix and stir evenly , and then adjust the temperature of the raw material to 22°C, weigh the MDI isocyanate according to the mass in the following table, preheat it to 22°C, add it to the above mixture, and stir evenly to obtain the mixture.

[0052] (2) Pour the mixture prepared in step (1) into a metal mold with a temperature of 30°C, control the overfill coefficient to 70%, close the mold and lock it with a clamp, mature for 3 minutes, open the mold, and machine the skin of the product Piercing, trimming, that is.

[0053]

Embodiment 3

[0055] The present embodiment provides a kind of polyurethane self-skinning foam, and its preparation method is as follows:

[0056] (1) Weigh PO / EO copolyether polyols, polymer polyols, crosslinking agents, surfactants, foaming agents, amine catalysts, organometallic catalysts and colorants according to the quality in the table below, and mix , stir evenly, then adjust the temperature of the raw material to 22°C, weigh the MDI isocyanate according to the mass in the following table, preheat it to 22°C, add it to the above mixture, and stir evenly to obtain the mixture.

[0057] (2) Pour the mixture prepared in step (1) into a metal mold with a temperature of 30°C, control the overfill coefficient to 20%, close the mold and lock it with a clamp, mature for 3 minutes, open the mold, and machine the skin of the product Piercing, trimming, that is.

[0058]

[0059]

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Abstract

The invention relates to the technical field of polymer materials, and specifically provides a polyurethane self-skin foam and a preparation method thereof. The raw materials of the polyurethane self-skin foam include a crosslinking agent, a catalyst and an isocyanate, as well as PO / EO copolyether polyol and Methyl formate; the molecular weight of the PO / EO copolyether polyol is 6000-12000, the primary hydroxyl content is 70-85%, and the ethylene oxide content is 10-20%. The present invention adopts a molecular weight of 6000-12000, primary The polyether polyol with a hydroxyl content of 70-85% and an ethylene oxide content of 10-20% is used in combination with the blowing agent methyl formate, which can not only replace the non-environmentally friendly hydrochlorofluorocarbon blowing agent HCFC-141b, Reduce the amount of blowing agent, and can improve the compatibility between materials, increase the skin density, tensile strength and tear strength of polyurethane self-skinned foam, but also reduce the density of the foam, improve the tensile strength and Tear strength, thereby significantly improving the performance of polyurethane integral skin foam skin and foam.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polyurethane self-skinned foam and a preparation method thereof. Background technique [0002] Polyurethane self-skin foam (integral skin foam, referred to as ISF foam), also known as integral skin foam, is a product made of a dense skin layer with a certain thickness (0.3-3.0mm) and a foam inner core through a molding process. And the cross-sectional density gradually decreases from the skin to the inner core, showing an anti-parabolic shape, and the skin layer has a density similar to that of the polymer matrix material, 900-1200kg / m 3 , the lowest density at the center is close to dozens to hundreds of kg / m 3 , the skin layer has both beautiful appearance and mechanical properties comparable to olefin plastic leather. [0003] The preparation process and principle of polyurethane self-skin foam is: use the reaction heat generated by the reaction of polyol compone...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/32C08G18/40C08G18/48C08G18/63C08J9/14C08G101/00
CPCC08G18/4837C08G18/632C08G18/4072C08G18/6674C08G18/3206C08J9/142C08J2203/12C08J2375/08C08G2110/0066
Inventor 柯其武李玉博
Owner 上海抚佳精细化工有限公司
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