Polyurethane modified polylol and polyurethane foam plastic prepared from polyurethane modified polylol

A polyurethane modification and polyurethane foam technology, which is applied in the field of polyurethane foam plastics, can solve the problems of high semi-rigid foam, reduced mechanical strength, and low mechanical strength, and achieve high porosity, small shrinkage, and high mechanical strength. Effect

Active Publication Date: 2018-11-06
成都科大博创科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A low open cell ratio will lead to shrinkage during the preparation of polyurethane foam, which will affect the finished product, and usually a high open cell ratio will lead to a decrease in mechanical strength
Therefore, it is currently difficult to prepare semi-rigid foams with high porosity and relatively high mechanical strength.
For example, the patent application with publication number CN102336900A provides a polyether polyol or polyether polyester as a cell opener for slow resilience polyurethane foam, which improves the open cell ratio, but has the problem of low mechanical strength

Method used

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  • Polyurethane modified polylol and polyurethane foam plastic prepared from polyurethane modified polylol
  • Polyurethane modified polylol and polyurethane foam plastic prepared from polyurethane modified polylol
  • Polyurethane modified polylol and polyurethane foam plastic prepared from polyurethane modified polylol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 The preparation of polyurethane modified polyol and polyurethane foam of the present invention

[0031] 1. Preparation of polyurethane modified polyol PIPA-4

[0032] Take 100g of polyether polyol (3050A), 4g of 1,4-butanediol and 0.2g of dibutyltin dilaurate, control the speed of electric stirrer not higher than 500rpm, stir and mix for 2min, then add diphenylmethane diisocyanate (MDI) 5.0-15.0g, control the rotational speed not higher than 500rpm, stir and mix for 5 minutes, vacuumize to remove air bubbles, and obtain polyurethane modified polyol (PIPA-4).

[0033] 2. Preparation of polyurethane foam A-1

[0034] Take polyether polyol (3050A) 160g, PIPA-4 40g, 1,4-butanediol 4~8g, foaming agent (water) 2.8g, dibutyltin dilaurate 0.1~0.8g, 33% triethylenediol 1.0-3.0g of amine solution (dipropylene glycol as the solvent), 3g of foam stabilizer (L580), stir and mix with an electric mixer at high speed for 60s at a speed of 3000rpm, then add MDI 110-135g, ...

Embodiment 2

[0035] Embodiment 2 The preparation of polyurethane modified polyol and polyurethane foam of the present invention

[0036] 1 Preparation of Polyurethane Modified Polyol PIPA-6

[0037] Take 100g of polyether polyol (3050A), 6g of 1,4-butanediol and 0.2g of dibutyltin dilaurate, control the speed of electric stirrer not higher than 500rpm, stir and mix for 2min, then add diphenylmethane diisocyanate (MDI) 5.0-15.0g, control the rotational speed not higher than 500rpm, stir and mix for 5 minutes, vacuumize to remove air bubbles, and obtain polyurethane modified polyol (PIPA-6).

[0038] 2. Preparation of polyurethane foam A-2

[0039] Take 160g of polyether polyol (3050A), 40g of PIPA-6, 4-8g of 1,4-butanediol, 2.8g of foaming agent (water), 0.1-0.8g of dibutyltin dilaurate, 33% triethylenediol 1.0-3.0g of amine solution (dipropylene glycol as the solvent), 3g of foam stabilizer (L580), stir and mix with an electric mixer at high speed for 60s at a speed of 3000rpm, then add ...

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Abstract

The invention discloses polyurethane modified polylol, which is prepared from the following ingredients in parts by weight: 100 parts of polyalcohol, 1.0 to 8.0 parts of chain extending agents, 0.1 to0.3 part of catalysts and 2.0 to 20.0 parts of diisocyanate. The invention also discloses polyurethane foam which is prepared from the polyurethane modified polylol and has the shrinkage rate and themechanical strength. The novel polyurethane modified polylol has the advantages that the polyurethane foam prepared from the polyurethane modified polylol has the advantages of high pore rate, low shrinkage rate and fine dimension of the prepared finished product, simultaneously has high mechanical strength, and solves the problems that the existing polyurethane foam is difficult to simultaneously consider the shrinkage rate and the mechanical strength; the application prospects are very good.

Description

technical field [0001] The invention relates to a polyurethane modified polyol and a polyurethane foam prepared therefrom. Background technique [0002] Polyurethane foam plastics, with the increase of molecular chain cross-linking density, that is, the decrease of molecular weight (Mc) between cross-linking points, the foam mechanical properties increase rapidly, while the elongation, compression set and swelling in solvent decrease rapidly . According to the Mc classification of foam, polyurethane foam can be divided into soft, semi-rigid and rigid foam. Among them, rigid foam is a fully closed-cell foam with relatively high mechanical strength, but its resilience is poor; soft foam has good resilience, but low mechanical strength; semi-rigid foam is a transition from soft foam to hard foam. The intermediate product has the advantages of both, it has certain mechanical strength and certain resilience, so its application range is wider, and it is widely used in automobile...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/32C08G18/76C08G18/66
CPCC08G18/3206C08G18/48C08G18/6674C08G18/7671C08G2110/005C08G2110/0083
Inventor 邹华维陈洋邹静李杰梁梅
Owner 成都科大博创科技有限公司
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