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Ultrahigh-density polyurethane flexible foam and preparation method thereof

An ultra-high-density, polyurethane technology is applied in the field of polyurethane materials to achieve the effects of simple preparation method, good mechanical properties, and easy-to-obtain raw materials

Inactive Publication Date: 2021-08-24
石家庄恒华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

[0003] Polyurethane soft foam is widely used, but at present, the highest density of polyurethane soft foam can only reach 170kg / m 3 Therefore, it is necessary to modify polyurethane soft foam to prepare higher density polyurethane soft foam to meet the application of polyurethane soft foam in more fields

Method used

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  • Ultrahigh-density polyurethane flexible foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The mass parts of raw materials of ultra-high-density polyurethane soft foam are: 45 parts of polyester polyol (functionality 2, molecular weight 1000), 45 parts of polyether polyol (functionality 2, molecular weight 2000), 15 parts of glycerin , 30 parts of toluene diisocyanate, 5 parts of silicone oil, 0.5 part of stannous octoate, 0.5 part of triethanolamine, 3.5 parts of liquid sodium abietate and 0.8 part of water;

[0033] The mass percent of 2,4-toluene diisocyanate in the toluene diisocyanate is 65%, and the mass percent of 2,6-toluene diisocyanate is 35%.

[0034] The preparation steps are:

[0035] First add polyester polyol, polyether polyol, glycerin, toluene diisocyanate, tin catalyst, alcohol catalyst and water into the mixer, stir evenly at 1000rpm, and react for 8min; then add physical blowing agent and foam stabilizer , stirred at high speed for 15 seconds (stirring speed is 3000rpm), and then poured into a polyurethane foaming machine for foaming. De...

Embodiment 2

[0037] The mass parts of raw materials of ultra-high-density polyurethane soft foam are: 50 parts of polyester polyol (functionality 2, molecular weight 1000), 50 parts of polyether polyol (functionality 2, molecular weight 1000), 10 parts of glycerin , 35 parts of toluene diisocyanate, 5 parts of silicone oil, 1 part of dibutyltin dilaurate, 1 part of triethanolamine, 3 parts of liquid sodium abietate and 0.5 part of water;

[0038] The mass percent of 2,4-toluene diisocyanate in the toluene diisocyanate is 65%, and the mass percent of 2,6-toluene diisocyanate is 35%.

[0039] The preparation steps are:

[0040] First add polyester polyol, polyether polyol, glycerol, toluene diisocyanate, tin catalyst, alcohol catalyst and water into the mixer, stir evenly at 1000rpm, and react for 5min; then add physical blowing agent and foam stabilizer , stirred at high speed for 15 seconds (stirring speed is 3000rpm), and then poured into a polyurethane foaming machine for foaming. Dens...

Embodiment 3

[0042] The mass parts of raw materials of ultra-high-density polyurethane soft foam are: 40 parts of polyester polyol (functionality 2, molecular weight 2000), 50 parts of polyether polyol (functionality 3, molecular weight 2000), 20 parts of glycerin , 40 parts of toluene diisocyanate, 4 parts of silicone oil, 0.5 part of stannous octoate, 0.5 part of dimethylethanolamine, 4 parts of liquid sodium abietate and 1 part of water;

[0043] The mass percent of 2,4-toluene diisocyanate in the toluene diisocyanate is 65%, and the mass percent of 2,6-toluene diisocyanate is 35%.

[0044] The preparation steps are:

[0045]First add polyester polyol, polyether polyol, glycerol, toluene diisocyanate, tin catalyst, alcohol catalyst and water into the mixer, stir evenly at 1000rpm, and react for 10min; then add physical blowing agent and foam stabilizer , stirred at high speed for 15 seconds (stirring speed is 3000rpm), and then poured into a polyurethane foaming machine for foaming. D...

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Abstract

The invention discloses ultrahigh-density polyurethane flexible foam and a preparation method thereof, and belongs to the technical field of polyurethane materials. The invention specifically discloses the ultrahigh-density polyurethane flexible foam composed of the following raw materials in parts by mass: 40 to 50 parts of polyester polyol, 40 to 50 parts of polyether polyol, 10 to 20 parts of glycerol, 30 to 40 parts of toluene diisocynate, 4 to 5 parts of a foam stabilizer, 0.5 to 1 part of a tin catalyst, 0.5 to 1 part of an alcohol catalyst, 3 to 4 parts of a physical foaming agent and 0.5 to 1 part of water. By reasonably designing the composition and dosage of each raw material of the polyurethane flexible foam, the ultrahigh-density polyurethane flexible foam is prepared, the density of the polyurethane flexible foam can exceed 200 kg / m<3>, and the prepared ultrahigh-density polyurethane flexible foam also has the advantages of high rebound resilience, good mechanical property and the like.

Description

technical field [0001] The invention relates to the technical field of polyurethane materials, in particular to an ultra-high-density polyurethane soft foam and a preparation method thereof. Background technique [0002] Polyurethane soft foam refers to soft polyurethane foam, which is a kind of flexible polyurethane foam with certain elasticity. It is the most widely used polyurethane product in polyurethane products. According to the foam density, polyurethane flexible foam products are roughly divided into low density, high density and medium density. According to different production processes, polyurethane soft foam can be divided into block soft foam and molded soft foam. Block soft foam is a foam product that is produced by a continuous process to produce a large volume of foam and then cut into the desired shape. Molded soft foam Foam is a foam product in which raw materials are directly mixed and injected into a mold to form a desired shape through the gap method. ...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/32C08G18/24C08G18/18C08G101/00
CPCC08G18/1825C08G18/242C08G18/244C08G18/3206C08G18/4018C08G18/42C08G18/4825C08G18/4829C08G18/6611
Inventor 庄建家
Owner 石家庄恒华聚氨酯科技有限公司