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A kind of halogen-free flame-retardant rigid polyurethane foam and its preparation method

A technology of rigid polyurethane and foamed plastics, which is applied in the field of polyurethane foamed plastics, halogen-free flame-retardant rigid polyurethane foamed plastics and their preparation, and can solve the problems of complex production process, long synthesis period and high cost of flame-retardant polyols. Achieve good synergistic flame retardant effect, simple product manufacturing process and low cost

Active Publication Date: 2015-10-28
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production process of reactive flame-retardant polyols is complicated, the synthesis period is long, and the cost is high, so it is not widely used in practical applications.

Method used

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  • A kind of halogen-free flame-retardant rigid polyurethane foam and its preparation method
  • A kind of halogen-free flame-retardant rigid polyurethane foam and its preparation method
  • A kind of halogen-free flame-retardant rigid polyurethane foam and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The raw materials used to prepare halogen-free flame-retardant rigid polyurethane foam are shown in Table 1:

[0044] Table 1

[0045] components

raw material name

parts by weight

polyol mixture

polyol mixture

100

polyisocyanate

diphenylmethane diisocyanate

105

Compound Flame Retardant

Compound Flame Retardant

20

Foaming agent

butane

20

[0046] composite catalyst

composite catalyst

1.0

foam stabilizer

AK8801

2.0

crosslinking agent

Glycerin

1.0

[0047] In Table 1, the composite flame retardant is obtained by compounding dimethyl methylphosphonate and urea with a weight ratio of 1:0.5; the polyol mixture is composed of polyether 4110 and polyether 4110H with a weight ratio of 2.5:1, The details are shown in Table 6; the composite catalyst is obtained by compounding a triethylenediamine solution with a weight ratio of 1.5:1 and dibut...

Embodiment 2

[0054] The raw materials used to prepare halogen-free flame-retardant rigid polyurethane foam are shown in Table 2:

[0055] Table 2

[0056] components

raw material name

parts by weight

polyol mixture

polyether polyol blend

100

polyisocyanate

MR‐200

125

Compound Flame Retardant

Compound Flame Retardant

30

Foaming agent

water

10

composite catalyst

composite catalyst

1.5

foam stabilizer

AK8802

2.5

[0057] crosslinking agent

Trimethylolpropane

1.2

[0058] In Table 2, the composite flame retardant is obtained by compounding triethyl phosphate and urea with a weight ratio of 1:0.8; the polyether polyol mixture is composed of polyether 4110 and polyether 4110H with a weight ratio of 1.5:1, specifically The situation is shown in Table 6; the composite catalyst is obtained by compounding N, N-diethylethanolamine solution and stannous octoate w...

Embodiment 3

[0070] The raw materials used to prepare halogen-free flame-retardant rigid polyurethane foam are shown in Table 3:

[0071] table 3

[0072]

[0073]

[0074] In Table 3, the compound flame retardant is obtained by compounding triphenyl phosphate and urea with a weight ratio of 1:1.2; the polyether polyol mixture is composed of polyether 4110 and polyether 4110H with a weight ratio of 1:1, specifically The situation is shown in Table 6. The composite catalyst is obtained by compounding a triethanolamine solution with a weight ratio of 3:1 and potassium isooctanoate. The triethanolamine solution is a dipropylene glycol solution with a triethanolamine mass content of 33%.

[0075] MDI3051 basic performance:

[0076] Appearance: colorless transparent liquid

[0077] Density (25°C, g / cm3): 1.22

[0078] NCO content: 33.6%

[0079] Viscosity (25°C, mPa.s): 14

[0080] Vapor pressure (25°C, mmHg): <0.00001

[0081] A preparation method of halogen-free flame-retardant ri...

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Abstract

The invention discloses halogen-free flame-retardant rigid polyurethane foamed plastic and a preparation method for the same. The polyurethane foamed plastic consists of the following raw materials in parts by weight: 100 parts of polyalcohol mixture, 105 to 180 parts of polyisocyanate, 20 to 80 parts of compound halogen-free flame retardant, 1 to 50 parts of foaming agent, 1 to 3 parts of composite catalyst, 2 to 4 parts of foam stabilizer and 1 to 2 parts of cross-linking agent. An obtained product is high in flame retardance and environment-friendly, the raw materials are free of halogen, and the production of toxic gas such as hydrogen halide during combustion is avoided; the raw materials are readily available and low in cost, so that the preparation cost of the polyurethane foamed plastic is greatly lowered; the polyurethane foamed plastic also has the characteristic of wide application range, and is applied to cold storage and heat-preservation industries of external wall heat-preservation of buildings, heat-preservation of pipelines, refrigerators, freezers and the like.

Description

technical field [0001] The invention relates to a polyurethane foam, in particular to a halogen-free flame-retardant rigid polyurethane foam and a preparation method thereof; it belongs to the technical field of polymer materials. Background technique [0002] Rigid polyurethane foam is a thermal insulation material and structural material with excellent performance. Its biggest advantages are light weight, good thermal insulation performance, strong adhesion with other materials, high compressive strength and good size. stability. Therefore, rigid polyurethane foam has received extensive attention and developed rapidly. It can partially replace wood, metal and other plastics, and its application range has penetrated into almost all fields of the national economy. It has become one of the indispensable polymer materials. [0003] Although polyurethane foam has many advantages, its flame retardancy is poor, and the product is extremely flammable, resulting in frequent fire a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/32C08G18/18C08G18/22C08K5/521C08K5/21C08J9/14C08J9/08C08G101/00
CPCC08G18/1808C08G18/246C08G18/6677C08G18/6688C08J9/08C08J9/141C08J2203/14C08J2203/142C08J2203/184C08J2375/08C08K5/21C08G2110/0025C08G2110/0083
Inventor 陈勇军罗远芳贾志欣贾德民毛晓琪何燕岭张秀芹李玲玉姚杏梅唐海兰
Owner SOUTH CHINA UNIV OF TECH
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