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Process for producing flame-proof fluid sealant for construction

A technology of sealants and flame retardants, applied in the field of sealants, can solve the problems of free isocyanate damage to the environment, building sealant flame retardancy, etc., and achieve the effects of good UV stability, good adhesion, and good bonding strength

Inactive Publication Date: 2009-04-08
BEIJING CHEM IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another object of the present invention is to solve the flame retardant problem of building sealants and the problem that free isocyanates in polyurethane sealants damage the environment

Method used

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  • Process for producing flame-proof fluid sealant for construction

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preparation example Construction

[0031] The preparation method of the flame-retardant building sealant that the present invention proposes comprises the following steps:

[0032] (1) Mix the first polyol and the second polyol with each other, dry at a low vacuum of less than 2 kPa at 110°C to 140°C for 2 to 3 hours, and lower the temperature to 60°C to 70°C. The mixing mass ratio of polyols is: the first polyol: the second polyol=1:0.2~2, and then add 3~15% of isocyanates accounting for the above mixture mass percentage and 0.01~0.001% of the above mixture mass percentage Dibutyltin dilaurate, reacted for 2 to 5 hours to obtain a polyurethane prepolymer;

[0033] (2) Add a blocked silane coupling agent accounting for 3 to 15% by mass of the above polyurethane prepolymer to the polyurethane prepolymer prepared above, and react at 70°C to 80°C for 1 to 2 hours to obtain a silane blocked coupling agent. terminal polyurethane prepolymer;

[0034] (3) Stir and mix the silane-terminated polyurethane prepolymer pr...

Embodiment 1

[0050] (1) Mix 50g of polyoxypropylene diol with a molecular weight of 4000 and 15g of polyoxypropylene triol with a molecular weight of 3000, dry at 120°C for 2 hours under low vacuum, cool down to about 65°C, and add 20g of isophorone Diisocyanate and dibutyltin dilaurate accounting for 0.003% by weight of the mixture are reacted for 2 to 5 hours, and after the isocyanate radical reaches a theoretical value, the reaction is stopped to obtain a polyurethane prepolymer. Add 15 g of 3-mercaptopropyltrimethoxysilane to the above polyurethane prepolymer, and react for 2 hours under the condition of 70° C. to 80° C. to obtain a silane-terminated polyurethane prepolymer.

[0051] (2) 100 g of the above-mentioned prepared silane-terminated polyurethane prepolymer and dried 60 g nano-calcium carbonate, 0.5 g Irganox 1010, 0.4 g Tinuvin 531, 15 g dibutyl phthalate (DBP), 2 g hydrogenated castor oil, 3g of titanium dioxide and 5g of antimony trioxide were added to the planetary agitato...

Embodiment 2

[0053] (1) 60 g of polyoxypropylene diol with a molecular weight of 6000 and 15 g of polyoxypropylene triol with a molecular weight of 6000 are mixed with each other, dried under a low vacuum at 120°C for 2 hours, cooled to about 65°C, and 20g of bis-(4 -Isocyanatocyclohexyl)methane and dibutyltin dilaurate accounting for 0.003% by mass of the above mixture were reacted for 4 hours, and after the isocyanate group reached the theoretical value, the reaction was stopped to obtain a polyurethane prepolymer. Add 15 g of N-cyclohexyl-3-aminopropylmethyldimethoxysilane to the above polyurethane prepolymer and react at 70° C. to 80° C. for 2 hours to obtain a silane-terminated polyurethane prepolymer.

[0054] (2) 100 g of the above-mentioned prepared silane-terminated polyurethane prepolymer and dried 80 g nano-calcium carbonate, 0.5 g Irganox 1076, 0.4 g Tinuvin 327, 20 g dioctyl phthalate (DOP), 3 g hydrogenated castor oil, 2g of carbon black and 10g of sodium antimonate were adde...

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Abstract

The invention relates to a preparation method of the seal glue of an inflaming retarding construction, which belongs to the technical field of the seal glue and comprises: at first, a first polylol and a second polylol are mutually mixed; then isocyanate and dibutyl tin laurate are added for reacting and preparing polyurethane prepolymer; then a terminated silane coupling agent is added for obtaining silane terminated polyurethane prepolymer; then the silane terminated polyurethane prepolymer is stirred mutually and mixed with dried nanometer fillings, a chemical inhibitor, a UV absorbent, a plasticizer, a thixotropic agent, dye and a flame retardant; then a deicer, a caking accelerant, and a catalyst are added, stirred and mixed for preparing the seal glue. The seal glue of the inflaming retarding construction does not have dissociative isocyanate, adopts halogen-free and inflaming retarding technology which is harmless to environment, producing and the health of users, has very good sticking performance with the materials such as glass, aluminum, marble, cement and the like, has good UV resistance and stability and can be broadly applied to the fields of construction, container, road, airport construction, and the like.

Description

technical field [0001] The invention relates to a method for preparing a flame-retardant building sealant, which belongs to the technical field of sealants. Background technique [0002] Silane-modified polyurethane is a new type of material. It has the advantages of both polyurethane and silicone materials. It has excellent properties such as moisture resistance, oil resistance, chemical resistance, wear resistance, and good storage stability. It has been widely used in Europe in recent years. For the preparation of high performance room temperature vulcanizing sealants. Compared with traditional polyurethane sealants, silane-modified polyurethane has obvious advantages in terms of curing mechanism, performance and use: from the perspective of curing mechanism, silane-modified polyurethane is under the action of a catalyst, the alkoxy group of silane and moisture Carry out hydrolysis and condensation to form a stable three-dimensional network structure of siloxane (Si-O-Si...

Claims

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Application Information

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IPC IPC(8): C09K3/10C09J175/04C09J9/00
Inventor 姚晓宁钱志国赵维江徐新民
Owner BEIJING CHEM IND RES INST
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