Flame retardant polyurethane sealant

A polyurethane sealant and polyurethane resin technology, applied in the direction of adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve problems such as failure to meet flame retardant requirements, poor sealant performance, etc., to achieve good elasticity, Good adhesion, good storage stability

Inactive Publication Date: 2018-10-30
芜湖市颂晖商贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sealant needs to be filled with a large amount of flame retardant, otherwise it will not meet the flame retardant requirements, and a large amount of flame retardant filling will cause the performance of the sealant to deteriorate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A flame-retardant polyurethane sealant, calculated in parts by weight, comprising the following components:

[0026] 75 parts of polyurethane resin, 8 parts of styrene-butadiene-styrene block copolymer, 3 parts of dioctyl phthalate, 40 parts of filler, 6 parts of hydroxypropyl acrylate, 6 parts of flame retardant, γ- 7 parts of aminopropyltriethoxysilane, 2 parts of polyethylene wax, and 2 parts of resorcinol monobenzoate. The filler is a mixture of fumed silica and organic bentonite, and the mass ratio of fumed silica to organic bentonite is 12:1.

[0027] The preparation method of flame retardant is:

[0028] In octane, add nano-scale magnesium aluminum hydrotalcite and polyaspartic acid and stir to mix, then raise the temperature to 80°C, then add titanate and stir for 5 hours, cool down to 55°C, then add diethyl chlorophosphite and calcium carbonate Reaction 6h, you can. The mass ratio of nanoscale magnesium aluminum hydrotalcite to polyaspartic acid is 35:1, the...

Embodiment 2

[0030] A flame-retardant polyurethane sealant, calculated in parts by weight, comprising the following components:

[0031] 65 parts of polyurethane resin, 6 parts of styrene-butadiene-styrene block copolymer, 5 parts of dioctyl phthalate, 50 parts of filler, 2 parts of hydroxypropyl acrylate, 4 parts of flame retardant, γ- 1 part of aminopropyl triethoxysilane, 1 part of polyethylene wax and 1 part of resorcinol monobenzoate. The filler is a mixture of fumed silica and organic bentonite, and the mass ratio of fumed silica to organic bentonite is 9:1. The crosslinking agent is a mixture of ethyl orthosilicate and methyltriethoxysilane.

[0032] The preparation method of flame retardant is:

[0033] In cyclohexane, add nano-sized magnesium aluminum hydrotalcite and polyaspartic acid to stir and mix, then raise the temperature to 70°C, then add titanate and stir for 6 hours, cool down to 50°C, then add diethyl chlorophosphite and carbonic acid Calcium reaction 8h, you can. T...

Embodiment 3

[0035] A flame-retardant polyurethane sealant, calculated in parts by weight, comprising the following components:

[0036] 85 parts of polyurethane resin, 12 parts of styrene-butadiene-styrene block copolymer, 1 part of dioctyl phthalate, 30 parts of filler, 7 parts of hydroxypropyl acrylate, 7 parts of flame retardant, γ- 10 parts of (methacryloyloxy)propyl trimethoxy silicon, 3 parts of polyethylene wax and 3 parts of resorcinol monobenzoate. The filler is a mixture of fumed silica and organic bentonite, and the mass ratio of fumed silica to organic bentonite is 10:1. The crosslinking agent is a mixture of ethyl orthosilicate and methyltriethoxysilane.

[0037] The preparation method of flame retardant is:

[0038] In acetone, add nano-sized magnesium aluminum hydrotalcite and polyaspartic acid to stir and mix, then raise the temperature to 90°C, then add titanate and stir for 3 hours, cool down to 60°C, then add diethyl chlorophosphite and calcium carbonate to react 4 h...

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PUM

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Abstract

The invention provides a flame retardant polyurethane sealant which contains the following components in parts by weight: 65-85 parts of polyurethane resin, 6-12 parts of styrene-butadiene-styrene segmented copolymer, 2-5 parts of a plasticizer, 30-50 parts of filler, 2-8 parts of a cross-linking agent, 1-10 parts of a coupling agent, 1-3 parts of polyethylene wax, 4-8 parts of a flame retardant and 1-3 parts of an ultraviolet absorbent. The flame retardant is mainly prepared by modification with nanoscale magnesia-alumina hydrotalcite and polyaspartic acid. The flame retardant polyurethane sealant not only has good flame retardant performance, but also has good bonding performance.

Description

technical field [0001] The invention belongs to the technical field of building sealing materials, and in particular relates to a flame-retardant polyurethane sealant. Background technique [0002] The sealing material refers to the material that can withstand the displacement of the joint to achieve the purpose of airtightness and watertightness and is embedded in the joint of the building, called the sealing material. Seal materials include metal materials (aluminum, lead, indium, stainless steel, etc.), non-metallic materials (rubber, plastic, ceramics, graphite, etc.), composite materials (such as rubber-asbestos board, airgel felt-polyurethane), but The most used is rubber-like elastomer material. Polyurethane resin is widely used as a main sealing material raw material. However, due to the difficulty in processing polyurethane itself, the product quality is relatively average, and the bonding strength cannot meet the current use requirements, making the bonding effect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/06C09J4/02C09J11/04C09J11/08C09J11/06C09K3/10
CPCC09J4/06C09J11/04C09J11/06C09J11/08C09K3/10C09K2003/1078
Inventor 汪泽维汪鹏
Owner 芜湖市颂晖商贸有限公司
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