Halogen-free flame-retardant polyurethane sealant

A polyurethane sealant and polyurethane resin technology, applied in adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of red phosphorus explosion, easy precipitation, low flame retardant efficiency of flame retardants, etc., and achieve good Elasticity, good storage stability, good adhesive effect

Inactive Publication Date: 2018-11-16
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 flame retardant efficiency of inorganic hydroxide flame retardants is low, and a large amount of addition is required to achieve the purpose of flame retardancy, which has a great impact on product performance; the problem of moisture absorption of red phosphorus flame retardants has a great impact on the final performance of the colloid. At the same time, there is a risk of explosion of red phosphorus when processing glue in a vacuum airtight environment; the types of polyphosphates include melamine polyphosphate, melamine pyrophosphate, etc. These flame retardants have low flame retardant efficiency in practical applications, and there are easy-to-dissolve problems
Although halogenated flame retardants have the characteristics of high flame retardant efficiency, due to the release of a large amount of toxic gases when they burn, there is a tendency to gradually limit their application in recent years.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A halogen-free flame-retardant polyurethane sealant, calculated in parts by weight, comprising the following components:

[0027] 55 parts of polyurethane resin, 8 parts of styrene-butadiene-styrene block copolymer, 3 parts of acetyl trioctyl citrate, 40 parts of filler, 3 parts of castor oil, 6 parts of hydroxypropyl acrylate, 2 parts of polyethylene wax 6 parts, 6 parts of flame retardant, 1 part of zinc borate, 7 parts of γ-aminopropyltriethoxysilane 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.

[0028] The preparation method of flame retardant is:

[0029] 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 nano...

Embodiment 2

[0031] A halogen-free flame-retardant polyurethane sealant, calculated in parts by weight, comprising the following components:

[0032] 50 parts of polyurethane resin, 6 parts of styrene-butadiene-styrene block copolymer, 5 parts of acetyl trioctyl citrate, 50 parts of filler, 4 parts of castor oil, 2 parts of hydroxypropyl acrylate, 1 part of polyethylene wax 1 part, 4 parts of flame retardant, 0.5 part of zinc borate, 1 part of γ-aminopropyltriethoxysilane 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.

[0033] The preparation method of flame retardant is:

[0034] 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 die...

Embodiment 3

[0036] A halogen-free flame-retardant polyurethane sealant, calculated in parts by weight, comprising the following components:

[0037] 60 parts of polyurethane resin, 12 parts of styrene-butadiene-styrene block copolymer, 1 part of acetyl trioctyl citrate, 30 parts of filler, 2 parts of castor oil, 7 parts of hydroxypropyl acrylate, 3 parts of polyethylene wax 10 parts, 7 parts of flame retardant, 1.5 parts of zinc borate, 10 parts of γ-(methacryloyloxy)propyl trimethoxy silicon 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.

[0038] The preparation method of flame retardant is:

[0039] 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 t...

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PUM

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Abstract

The invention discloses a halogen-free flame-retardant polyurethane sealant which are prepared from the following components in parts by weight: 50 to 60 parts of polyurethane resin, 6 to 12 parts ofstyrene-butadiene-styrene segmented copolymer, 2 to 5 parts of plasticizer, 30 to 50 parts of filler, 2 to 4 parts of castor oil, 2 to 8 parts of cross-linking agent, 1 to 10 parts of coupling agent,1 to 3 parts of polyethylene wax, 4 to 8 parts of flame retardant, 0.5 to 1.5 parts of zinc borate and 1 to 3 parts of ultraviolet absorbent. The flame retardant is prepared mainly from nanoscale Mg-Al hydrotalcite and polyaspartic acid by modification. The halogen-free flame-retardant polyurethane sealant not only has excellent flame retardance and has no pollution, but also has excellent adhesive property.

Description

technical field [0001] The invention belongs to the technical field of building sealing materials, and in particular relates to a halogen-free 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 b...

Claims

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Application Information

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