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Polyurethane coated flame-retardant sealing rubber strip

A sealing strip and wrapping technology, which is applied in the field of fireproof materials, can solve the problems of poor ductility, short service life and weak migration resistance of the sealing strip, and achieves uniform foaming, convenient ingredients and high expansion rate. Effect

Inactive Publication Date: 2020-08-11
SICHUAN JINWANGTONG ELECTRONICS SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are various materials and types of fireproof sealing strips on the market, but they may not be able to achieve the flame retardant and expansion effects they advertise. At the same time, many sealing strips on the market have poor ductility, strong odor, partial shrinkage, and anti-migration capabilities. Weakness leads to short service life, and it will fall off from the carrier after leaving the factory for a period of time. How to prepare a polyurethane-coated flame-retardant sealing strip with good sealing effect and flame-retardant effect, low cost, and simple and flexible operation is very useful. necessary

Method used

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  • Polyurethane coated flame-retardant sealing rubber strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] According to the mass ratio A:B=0.45:1, put it on the PE casting film through a two-component foaming machine, and then place it in the mold and bake it in an oven with a temperature of 35°C and a length of 20 meters for 4 minutes to obtain uniform foaming. finished product. Among them, component A is diisocyanate; component B is in parts by weight, 0.6 parts by weight of triethanolamine, 2.5 parts by weight of water, 41 parts by weight of polyester polyol, and 41 parts by weight of polyether polyol are added to the mixing tank and stirred After 10 minutes, slowly add 0.7 parts by weight of dimethylaminoethyl ether and 14.9 parts by weight of expanded graphite, and stir for 20 minutes until the mixture is evenly mixed to obtain the second component B.

[0035] After testing, all test results can meet and exceed the requirements of the national standard "GB / T 16807-2009 Fireproof Expansion Seals" for fireproof expansion seals, especially the expansion ratio and oxygen in...

Embodiment 2

[0037] According to the mass ratio A:B=0.5:1, put it on the PE casting film through a two-component foaming machine, and then place it in the mold and bake it in an oven with a temperature of 35°C and a length of 20 meters for 4 minutes to obtain uniform foaming. finished product. Among them, component A is diisocyanate; component B is in parts by weight, 0.7 parts by weight of triethylamine, 3 parts by weight of water, 43 parts by weight of polyester polyacid, and 43 parts by weight of polyether polyol are added to the mixing tank Stir for 3 minutes, then slowly add 0.8 parts by weight of dimethylaminoethyl ether and 9.5 parts by weight of expanded graphite, and stir for 5 minutes until uniformly mixed to obtain the second component B.

[0038] After testing, all test results can meet and exceed the requirements of the national standard "GB / T 16807-2009 Fireproof Expansion Seals" for fireproof expansion seals, especially the expansion ratio and oxygen index can reach higher s...

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Abstract

The invention discloses a polyurethane coated type flame-retardant sealing rubber strip. The sealing rubber strip comprises a first component A and a second component B, wherein a mass ratio of the first component A to the second component B is (0.4-0.8): 1. The first component A is diisocyanate. The second component B is prepared by adding raw materials including 0.5-5 parts by weight of an auxiliary agent, 1-5 parts by weight of a foaming agent, 30-70 parts by weight of polyester polybasic acid and 30-70 parts by weight of polyether polyol into a mixing kettle, carrying out stirring for 3-10minutes, then slowly adding 0.5-2 parts by weight of a catalyst and 2-10 parts by weight of a flame retardant, and carrying out stirring for 5-20 minutes until the materials are uniformly mixed so asto obtain the second component B. According to the invention, expanded graphite with a good expansion effect and other flame retardants with good performance are selectively added into the sealing rubber strip, so the sealing rubber strip is good in flame retardant capacity and high in expansion rate and can meet national 3C requirements in China.

Description

technical field [0001] The invention belongs to the technical field of fireproof materials, and in particular relates to a polyurethane-coated flame-retardant sealing strip. Background technique [0002] There are various materials and types of fireproof sealing strips on the market, but they may not be able to achieve the flame retardant and expansion effects they advertise. At the same time, many sealing strips on the market have poor ductility, strong odor, partial shrinkage, and anti-migration capabilities. Weakness leads to short service life, and it will fall off from the carrier after leaving the factory for a period of time. How to prepare a polyurethane-coated flame-retardant sealing strip with good sealing effect and flame-retardant effect, low cost, and simple and flexible operation is very useful. necessary. Contents of the invention [0003] The object of the present invention is to provide a polyurethane-coated flame-retardant sealing strip, which has a rela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08K7/24C08K3/22C08K3/38C08K3/04C08K9/10C08K3/02C08K13/04C08K13/06C08J9/08
CPCC08J9/0066C08J9/009C08J9/0095C08J9/08C08J2203/02C08J2375/04C08K3/04C08K3/2279C08K7/24C08K9/10C08K13/04C08K13/06C08K2003/026C08K2003/387
Inventor 钟小芳
Owner SICHUAN JINWANGTONG ELECTRONICS SCI & TECH