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Preparation method of opening agent for high resilience polyurethane foam

A polyurethane foam and cell-opening agent technology, which is applied in the field of polyether polyol synthesis, can solve the problem of loss of material properties, achieve no loss of material properties, improve foam structure, and increase the effect of opening cells

Active Publication Date: 2016-02-10
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the use of traditional cell opening agents, when the formula system is too different, there are generally different choices to meet the requirements of different systems, and when the amount of use is too large, part of the material properties will be lost

Method used

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  • Preparation method of opening agent for high resilience polyurethane foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) At room temperature, add 32 g of propylene glycol, 29 g of sucrose, and 9 g of potassium hydroxide to the autoclave. Replace with nitrogen. After the oxygen content in the autoclave is measured to be less than 50 ppm, the temperature is increased to 115° C., and vacuum (-0.09 MPa) is used for dehydration. hour.

[0025] (2) Control the temperature in the kettle at 115°C, add 490g of propylene oxide and 2450g of ethylene oxide dropwise to carry out the polymerization reaction. After the dropwise addition is completed, after the pressure in the kettle does not change, the residual monomers are removed under a vacuum of -0.09MPa for 1 hour . Cool down to 80℃, add 18g phosphoric acid and 90g distilled water, stir and react for 40min, then add 4.5g magnesium silicate, stir for 40min, vacuum dehydration at 115℃, -0.09MPa for 2 hours, filter to obtain pore opener A, specific test data See Table 1.

Embodiment 2

[0027] (1) At room temperature, add 57g of propylene glycol, 46g of sorbitol, and 10g of potassium hydroxide into the autoclave, and replace with nitrogen. After measuring the oxygen content in the autoclave to be less than 50ppm, the temperature is increased to 115°C, and nitrogen is blown to vacuum (-0.09MPa) for dehydration. 2 hours.

[0028] (2) Control the temperature in the kettle to 115°C, drop 980g of propylene oxide and 3918g of ethylene oxide to carry out polymerization reaction. After the dropwise addition is completed and the pressure in the kettle does not change, the residual monomers are removed under vacuum at -0.09MPa for 1 hour. Cool down to 80℃, add 20g phosphoric acid and 150g distilled water, stir and react for 40min, then add 7.5g magnesium silicate, stir for 40min, vacuum dehydration at 115℃, -0.09MPa for 1 hour, filter to obtain pore opener B, specific test data See Table 1.

Embodiment 3

[0030] (1) At room temperature, add 45.5g of sorbitol, 79.5g of diethylene glycol, 100g of glycerol, and 4g of potassium hydroxide to the autoclave at room temperature. Replace with nitrogen. After measuring the oxygen content in the kettle to be less than 50ppm, increase the temperature to 115°C and blow nitrogen. Vacuum (-0.09MPa) dehydration for 2 hours.

[0031] (2) Control the temperature in the kettle at 115°C, drop 944 g of propylene oxide and 2831 g of ethylene oxide to carry out the polymerization reaction. After the dropwise addition is completed and the pressure in the kettle remains unchanged, the residual monomers are removed under vacuum at -0.09MPa for 1 hour. Cool down to 80℃, add 8g phosphoric acid and 120g distilled water, stir and react for 40min, then add 6g magnesium silicate, stir for 40min, vacuum dehydration at 115℃, -0.09MPa for 3 hours, filter to get pore opener C, see specific test data Table 1.

[0032] Table 1 Specific test data of the pore openers pre...

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Abstract

The invention belongs to the technical field of polyether polyol synthesis, and particularly relates to a preparation method of an opening agent for high resilience polyurethane foam. The preparation method comprises the following steps that an alkali metal catalyst is added to an initiator for a reaction, after high temperature dehydration is conducted, propylene epoxide and ethylene oxide are dropwise added to conduct a polymerization reaction, after the reaction is completed, phosphoric acid is added for neutralization, magnesium silicate is added for adsorption, drying and filtering are conducted, and the opening agent is obtained. The preparation method of the opening agent for the high resilience polyurethane foam is simple in technology and easy to achieve; the opening agent prepared through the preparation method can improve the foam opening performance, prevent closed pores and improve a foaming structure, and a product has good resilience, compressibility and comfort.

Description

Technical field [0001] The invention belongs to the technical field of polyether polyol synthesis, and specifically relates to a preparation method of a cell opener for high resilience polyurethane foam. Background technique [0002] The open cell rate is an important indicator of high resilience polyurethane foam. If the open cell rate is insufficient, it will cause insufficient foam stability, shrinkage, stiffness, and even loss of most of the mechanical properties. At present, there are two main ways to improve high resilience polyurethane foam, which are divided into physical and chemical methods. The former generally uses physical rolling and air injection to increase the open rate. The latter includes adjusting the formula and controlling the reaction synthesis speed. In addition to the balance of the system, an effective method often used is to add a pore opener. [0003] Traditional cell openers are generally classified into siloxane copolymers, polyamine compounds and est...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08G18/48
Inventor 周玉波孙兆任王玉刘军
Owner SHANDONG INOV NEW MATERIALS CO LTD
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