Preparation method of flame-retardant rigid polyurethane foam plastic

A polyurethane rigid foam and plastic technology, applied in the field of plastics, can solve the problems of poor thermal stability, high toxicity, and high price of flame retardants

Inactive Publication Date: 2016-08-10
SUZHOU YAKE PLASTIC RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are not many polyurethane rigid foams on the market that can reach the national standard B2 level, that is, the oxygen index is greater than 32. Even if the flame retardancy of some polyurethane rigid foams meets the requirements of the national standard, the flame retardants used are expensive and highly toxic. , poor thermal stability

Method used

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  • Preparation method of flame-retardant rigid polyurethane foam plastic

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The specific preparation method is as follows:

[0020] a) Selected raw materials: in parts by mass, take 100 parts of polyether polyol, 1.5 parts of polyaryl polyisocyanate, 20 parts of composite flame retardant, 2 parts of foam stabilizer B-8462, 1 part of catalyst N, N - Dimethylcyclohexylamine, 0.5 part of surfactant sodium dodecylbenzenesulfonate and 15 parts of blowing agent n-pentane. Among them, the composite flame retardant is composed of ammonium polyphosphate and aluminum hydroxide in a mass ratio of 3:2.

[0021] b) Foaming treatment, the specific preparation process is: first add the weighed polyether polyol, composite flame retardant, foam stabilizer, catalyst, surfactant and foaming agent into a container equipped with a stirring device, Mix evenly with a high-speed mixer; then quickly add the weighed polyaryl polyisocyanate, stir for 30 minutes, and the speed of the mixer is 2000r / min; when there are bubbles and the foam body turns white, immediately in...

Embodiment 2

[0024] The specific preparation method is as follows:

[0025] a) Optional raw materials: in parts by mass, take 100 parts of polyether polyol, 2 parts of polyaryl polyisocyanate, 25 parts of composite flame retardant, 3 parts of foam stabilizer B-8462, 2 parts of catalyst N, N - Dimethylcyclohexylamine, 1 part sodium dodecylbenzenesulfonate surfactant and 20 parts n-pentane blowing agent. Among them, the composite flame retardant is composed of ammonium polyphosphate and aluminum hydroxide in a mass ratio of 3:2.

[0026] b) Foaming treatment, the specific preparation process is: first add the weighed polyether polyol, composite flame retardant, foam stabilizer, catalyst, surfactant and foaming agent into a container equipped with a stirring device, Mix evenly with a high-speed mixer; then quickly add the weighed polyaryl polyisocyanate, stir for 30 minutes, and the speed of the mixer is 2000r / min; when there are bubbles and the foam body turns white, immediately inject the ...

Embodiment 3

[0029] The specific preparation method is as follows:

[0030] a) Selected raw materials: in parts by mass, take 100 parts of polyether polyol, 1.2 parts of polyaryl polyisocyanate, 30 parts of composite flame retardant, 2.5 parts of foam stabilizer B-8462, 1.5 parts of catalyst N, N - Dimethylcyclohexylamine, 0.8 parts of surfactant sodium dodecylbenzenesulfonate and 18 parts of blowing agent n-pentane. Among them, the composite flame retardant is composed of ammonium polyphosphate and aluminum hydroxide in a mass ratio of 3:2.

[0031] b) Foaming treatment, the specific preparation process is: first add the weighed polyether polyol, composite flame retardant, foam stabilizer, catalyst, surfactant and foaming agent into a container equipped with a stirring device, Mix evenly with a high-speed mixer; then quickly add the weighed polyaryl polyisocyanate, stir for 30 minutes, and the speed of the mixer is 2000r / min; when there are bubbles and the foam body turns white, immediat...

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Abstract

The invention provides a method for preparing a flame-retardant polyurethane rigid foam plastic. The preparation method includes the following steps: a) selecting raw materials, b) foaming treatment, and c) curing and molding. The invention discloses a method for preparing a flame-retardant polyurethane rigid foam plastic. The preparation method is simple and convenient in operation and has a reasonable process formula. By using a compound flame retardant with low price, low toxicity and good thermal stability, the polyurethane The flame retardant effect of rigid foam plastic.

Description

technical field [0001] The invention relates to a plastic, in particular to a method for preparing a flame-retardant rigid polyurethane foam plastic, and belongs to the technical field of plastics. Background technique [0002] Plastic is a very important organic synthetic polymer material with a wide range of applications. Plastics are formulated from many materials, among which high molecular polymers, also known as synthetic resins, are the main components of plastics. In addition, in order to improve the performance of plastics, various auxiliary materials must be added to high molecular compounds, such as fillers, extenders, etc. Plasticizers, lubricants, stabilizers, colorants, antistatic agents, etc., can become plastics with good performance. my country is a big producer of plastic raw materials. As one of the pillar industries of the light industry, the plastic industry has always maintained a relatively fast development speed, and at the same time, its economic be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/79C08G18/48C08J9/14C08K3/22C08K3/32C08K13/02C08G101/00
CPCC08G18/794C08G18/48C08J9/141C08J2203/14C08J2375/08C08K3/22C08K3/32C08K13/02C08K2003/2227C08K2003/323
Inventor 刘永清
Owner SUZHOU YAKE PLASTIC RUBBER CO LTD
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