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Method for preparing flame-retardant and alkali-resistant polyurethane adhesive

A technology of polyurethane adhesive and flame-retardant polyether, applied in polyurea/polyurethane adhesive, adhesive, adhesive type, etc. Good flame retardancy and good alkali resistance, etc., to achieve the effect of good flame retardancy and good alkali resistance

Inactive Publication Date: 2012-07-04
BEIJING COMENS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present invention provides a method for preparing a flame-retardant and alkali-resistant polyurethane adhesive, which can solve the problem that the adhesives currently used for STP insulation boards cannot meet the requirements of flame-retardant and alkali-resistant properties at the same time, and the prepared adhesive is flame-retardant and alkali-resistant Alkaline good

Method used

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Examples

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preparation example Construction

[0016] The embodiment of the present invention provides a method for preparing a polyurethane composite adhesive, which is a polyurethane composite adhesive with flame retardancy and strong alkali resistance. The adhesive can be composited with glass fiber cloth and AL foil or PET film, and is used as STP ultra-thin heat insulation Preparation of insulation boards. The preparation method of this adhesive comprises the following steps:

[0017] Prepare main agent and curing agent respectively;

[0018] Wherein, preparation main agent comprises:

[0019] Add flame-retardant polyether polyol and chain extender to the first reaction kettle, keep constant temperature, carry out vacuum dehydration, add diisocyanate after cooling down, stir evenly, add ethyl acetate after heat preservation reaction, and obtain the main agent;

[0020] Preparation of curing agent includes:

[0021] Esterification: In the second reaction kettle, mix adipic acid, isophthalic acid and diethylene glyco...

Embodiment 1

[0043] This embodiment provides a method for preparing a flame-retardant and alkali-resistant polyurethane composite adhesive, which specifically includes:

[0044] Prepare main agent and curing agent respectively;

[0045] Wherein, preparation main agent comprises:

[0046] Add 100kg of halogenated polyether triols and 5.8kg of 1,4-butanediol into the reaction kettle, keep a constant temperature of 120°C, dehydrate for 2 hours under a vacuum of -0.1MPa, cool down to 80°C, and then add 55kg of diphenyl Methane diisocyanate, stirred evenly, kept warm for 4 hours, then added 69kg of ethyl acetate to obtain the main agent;

[0047] Preparation of curing agent includes:

[0048] Esterification: In a reaction kettle, mix 60kg of adipic acid, 100kg of isophthalic acid and 140kg of diethylene glycol and raise the temperature to 220°C, fill with nitrogen to protect, start to discharge water, and carry out the esterification reaction. The judgment of the end point is based on the th...

Embodiment 2

[0052] This embodiment provides a method for preparing a flame-retardant and alkali-resistant polyurethane composite adhesive, which specifically includes:

[0053] Prepare main agent and curing agent respectively;

[0054] Wherein, preparation main agent comprises:

[0055] Add 100kg of halogenated polyether triols and 8.0kg of 1,4-butanediol into the reaction kettle, keep a constant temperature of 120°C, dehydrate for 2 hours under a vacuum of -0.1MPa, cool down to 80°C, and then add 60kg of diphenyl Methane diisocyanate, stir evenly, heat preservation reaction for 4 hours, then add 72kg of ethyl acetate to obtain the main agent;

[0056] Preparation of curing agent includes:

[0057] Esterification: In a reaction kettle, mix 45kg of adipic acid, 115kg of isophthalic acid and 86kg of diethylene glycol and raise the temperature to 220°C, fill with nitrogen to protect, start to discharge water, and carry out the esterification reaction. The judgment of the end point is base...

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Abstract

The invention discloses a method for preparing a flame-retardant and alkali-resistant polyurethane adhesive, and belongs to the technical field of adhesive preparation. The method comprises the following steps of: synthesizing a main gent by adopting flame-retardant polyether polyol, diisocyanate, a chain extender and the like; synthesizing a curing agent by using adipic acid, isophthalic acid, diethylene glycol, diisocyanate and the like; and mixing the main agent and the curing agent in a certain ratio to obtain the two-component polyurethane adhesive with excellent flame retardancy and alkali resistance. The adhesive can be used for compounding glass fiber cloth and polyethylene glycol terephthalate (PET) and aluminum foils and finally used for standard temperature and pressure (STP) ultrathin insulating boards for exterior insulation engineering for newly built residential buildings and public buildings, which take a concrete and brickwork structure as a base layer, and the insulating boards are environment-friendly and flame-retardant compared with the traditional heat insulating materials.

Description

technical field [0001] The invention relates to the field of adhesive preparation, in particular to a method for preparing a polyurethane adhesive which can be used as a composite of glass fiber cloth and has excellent flame retardancy and alkali resistance. Background technique [0002] With the acceleration of urbanization, the external wall insulation and fire resistance of floors have attracted much attention. At present, thermal insulation materials on the market are divided into two types: organic thermal insulation materials and inorganic thermal insulation materials. Compared with inorganic thermal insulation materials, organic thermal insulation materials have better thermal conductivity, but their bonding strength with cement mortar is poorer, and they are easy to crack and fall off during use. Moreover, organic thermal insulation materials themselves are combustible materials, so they must be added during use. Flame retardants, due to the current market supervisi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J175/06C08G18/66C08G18/48C08G18/50C08G18/42C08G63/672
Inventor 张淑萍沈峰
Owner BEIJING COMENS NEW MATERIALS