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Foaming agent for polyurethane foam and preparation method of foaming agent

A polyurethane foam and foaming agent technology, applied in the field of polymer foaming agents, can solve the problems of reducing the foam density and poor solubility of polyurethane plastic foam, and achieve the effect of simple preparation process, low cost and cost reduction

Pending Publication Date: 2020-05-19
上海路洋化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention provides a foaming agent for polyurethane foam and a preparation method thereof. The preparation method disclosed by the present invention is simple in process, low in cost, can improve foam fluidity, and solve the problem of cyclopentane in polyether polyols. For the problem of poor solubility in medium, the combination of cyclopentane and R600a has the advantages of reducing the foam density of polyurethane plastic foam and saving dosage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 of the present invention discloses a foaming agent for polyurethane foam and a preparation method thereof, and the adopted technical scheme is as follows:

[0029] A foaming agent for polyurethane foam, comprising the following components in weight percent: 65% of cyclopentane and 35% of isobutane.

[0030] 2. A method for preparing a blowing agent for polyurethane foam according to claim 1, wherein the specific steps are as follows:

[0031] S1, set the ambient temperature to 1°C, inject cyclopentane with a concentration of 99% into an acid and alkali-resistant pressure vessel, and then inject liquid isobutane into the pressure vessel after it has stabilized, the purity of liquid isobutane ≥98%, water content ≤150ppm;

[0032] S2, after stably standing still, stir for 10-15min at a stirring speed of 20-25r / min, let stand for 10min, stir again for 10-15min, stir evenly, and fill.

Embodiment 2

[0034] Embodiment 2 of the present invention discloses a foaming agent for polyurethane foam and a preparation method thereof, and the adopted technical scheme is as follows:

[0035] A blowing agent for polyurethane foam, comprising the following components in weight percent: 78% of cyclopentane and 22% of isobutane.

[0036] 2. A method for preparing a blowing agent for polyurethane foam according to claim 1, wherein the specific steps are as follows:

[0037] S1, set the ambient temperature to 20°C, inject cyclopentane with a concentration of 99% into an acid and alkali-resistant pressure vessel, and then inject liquid isobutane into the pressure vessel after it has stabilized, the purity of liquid isobutane ≥98%, water content ≤150ppm;

[0038] S2, after stably standing still, stir for 10-15min at a stirring speed of 20-25r / min, let stand for 10min, stir again for 10-15min, stir evenly, and fill.

Embodiment 3

[0040] Embodiment 3 of the present invention discloses a foaming agent for polyurethane foam and a preparation method thereof, and the adopted technical scheme is as follows:

[0041] A foaming agent for polyurethane foam, comprising the following components in weight percentage: 70% of cyclopentane and 30% of isobutane.

[0042] 2. A method for preparing a blowing agent for polyurethane foam according to claim 1, wherein the specific steps are as follows:

[0043] S1, set the ambient temperature to 10°C, inject cyclopentane with a concentration of 99% into an acid and alkali-resistant pressure vessel, and then inject liquid isobutane into the pressure vessel after it has stabilized, the purity of liquid isobutane ≥98%, water content ≤150ppm;

[0044] S2, after stably standing still, stir for 10-15min at a stirring speed of 20-25r / min, let stand for 10min, stir again for 10-15min, stir evenly, and fill.

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Abstract

The invention discloses a foaming agent for polyurethane foam and a preparation method of the foaming agent. The foaming agent is prepared from the following components in percentage by weight: 65 to78 percent of cyclopentane and 22 to 35 percent of isobutane. The preparation method disclosed by the invention is simple in process, and low in cost, is capable of improving foamflowability, and solving the problem of poor solubility of cyclopentane in polyether polyol, and the cyclopentane is matched with R600a, so thatadvantages of reducing the foam density of the polyurethane foam and saving the dosage are achieved.

Description

technical field [0001] The invention relates to the technical field of polymer foaming agents, in particular to a foaming agent for polyurethane foam and a preparation method thereof. Background technique [0002] Foaming agent is the substance that makes the target substance form pores, and it can be divided into three categories: chemical foaming agent, physical foaming agent and surfactant. A chemical blowing agent is a compound that releases gases such as carbon dioxide and nitrogen after thermal decomposition, and forms pores in the polymer composition; a physical blowing agent is a change in the physical form of a certain substance through the foam pores. That is, it is formed by the expansion of compressed gas, the volatilization of liquid or the dissolution of solid; the foaming agent has high surface activity, which can effectively reduce the surface tension of the liquid, and arrange the double electron layer on the surface of the liquid film to surround the air. ...

Claims

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Application Information

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IPC IPC(8): C08J9/14C08G18/48C08L75/04C08G101/00
CPCC08G18/48C08G2101/00C08J9/141C08J2203/14C08J2203/182C08J2375/04
Inventor 代淑琼白文科张修建
Owner 上海路洋化工有限公司