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Silicyl-terminated modified polyurethane sealant and preparation method thereof

A polyurethane sealant and silyl-terminated technology, which is applied in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problem of poor adhesion of metal and aluminum alloys, poor low-temperature toughness, and failure to achieve bonding Sealing and other issues, to achieve strong adhesion and sealing, high transparency, and good application prospects

Inactive Publication Date: 2014-10-08
GUANGZHOU XINZHAN NEW CHEM MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the epoxy sealant has high strength, it has poor toughness at low temperature, and it is easy to oxidize, crack and change color when exposed to the outdoors for a long time, and cannot achieve the effect of bonding and sealing, and the overall appearance is also greatly affected
Polyurethane sealants have poor adhesion to metal aluminum alloys, and also cannot play a good role in bonding and sealing

Method used

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  • Silicyl-terminated modified polyurethane sealant and preparation method thereof
  • Silicyl-terminated modified polyurethane sealant and preparation method thereof
  • Silicyl-terminated modified polyurethane sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Put fumed silica in a constant temperature oven and dry at 120°C for 20 hours; 90 g of terminal silyl group-modified polyurethane prepolymer, 60 g of dioctyl phthalate, 2-(2'-hydroxyl-5'-tertene Add 1.35g of octylphenyl)benzotriazole and 1.35g of bis(1,2,2,6,6-pentamethylpiperidinol) sebacate into the planetary kneader, and heat up to 80-90°C , evacuate to 0.090±0.005MPa, stir and degas for 1~2h; cool down to below 60°C, stop stirring and vacuumize; add fumed silica (70g / time) in 2 batches until the mixture is uniform, and then add vinyl Trimethoxysilane 6g, after mixing evenly, evacuate at 80-90°C to 0.090±0.005MPa, stir and degas for 1-2h; reduce the temperature of the obtained high-mixture to below 50°C, fill with nitrogen, add viscosity promoter Agent N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane 6g, mix well. Add 0.3 g of catalyst dibutyltin dilaurate under the condition of nitrogen protection, and mix evenly; vacuumize, continue to mix evenly; fill with nitrogen...

Embodiment 2

[0040] The preparation method of this sealant is as in Example 1.

[0041] Raw material composition and quality in table 2 embodiment 2

[0042]

Embodiment 3

[0044] The preparation method of this sealant is as in Example 1.

[0045]Raw material composition and quality in table 3 embodiment 3

[0046]

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PUM

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Abstract

The invention discloses a silicyl-terminated modified polyurethane sealant and a preparation method thereof, belonging to the field of adhesives. The sealant is characterized by comprising the following components by mass: 20 to 85 parts of a silicyl-terminated modified polyurethane prepolymer, 10 to 200 parts of a plasticizer, 0 to 5 parts of a water-removal additive, 10 to 100 parts of a filling material, 0 to 10 parts of an adhesion promoter, 0.1 to 1.5 parts of an ultraviolet ray absorber, 0.1 to 1.5 parts of a stabilizing agent and 0.01 to 1.5 parts of a catalyst. The sealant prepared from the above-mentioned components has wide adaptability to substrates, shows strong bonding force and sealing performance on stone, glass, wood, metal, plastic and the like and exert a positive effect on beautifying of appearance.

Description

technical field [0001] The invention belongs to the field of polyurethane sealants / adhesives, and relates to a silyl group-modified polyurethane sealant and a preparation method thereof. technical background [0002] At present, it is applied to the bonding and sealing of stone, glass, wood, metal, plastic, etc., which have high requirements on appearance. There are mainly epoxy sealants and polyurethane sealants on the market. Although the epoxy sealant has high strength, it has poor toughness at low temperature, and it is easy to oxidize, crack and change color when exposed to the outside for a long time. It cannot achieve the effect of bonding and sealing, and the overall appearance is also greatly affected. Polyurethane sealants have poor adhesion to metal aluminum alloys, and also cannot play a good role in bonding and sealing. Compared with other colored glues, transparent glues are easy to clean after rework and have less impact on appearance. [0003] Compared with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J11/04C09J11/06
Inventor 黄活阳何晓军陆姝伶冯矩佳
Owner GUANGZHOU XINZHAN NEW CHEM MATERIAL