Sealant resistant to high and low temperature and preparation method and application thereof

Abstract

The invention discloses a sealant resistant to high and low temperature and a preparation method and application thereof. The sealant is prepared from the following raw materials: epoxidized hydroxyl-terminated polybutadiene, a polystyrene-polyisoprene-polystyrene copolymer, a tackifier and an anti-aging agent. The sealant can still keep excellent viscosity within the temperature range of -30 DEGC to 80 DEG C. The 180-degree stripping force for PE materials is larger than or equal to 22N / 25mm, and the 90-degree stripping force for PE materials is larger than or equal to 30N / 25mm. The 180-degree stripping force for EPDM materials is greater than or equal to 9N / 25mm, and the 90-degree stripping force for EPDM materials is greater than or equal to 16N / 25mm. The 180-degree stripping force forpainted doors is larger than or equal to 35N / 25mm, and the 90-degree stripping force for painted doors is larger than or equal to 28N / 25mm. The degumming phenomenon cannot occur. The sealant providedby the invention is especially suitable for PE materials, EPDM materials, painted doors and plastic doors.

Description

technical field [0001] The invention relates to the field of glue, in particular to a high and low temperature resistant sealant and its preparation method and application. Background technique [0002] Sealant refers to a sealing material that is deformed due to the shape of the sealing surface, is not easy to flow, and has a certain degree of adhesion. According to different vulcanization methods, it can be divided into wet air vulcanization type sealant and chemical vulcanization type sealant; according to different forms, it can be divided into paste sealant, liquid elastomer sealant, hot melt sealant; according to the performance after construction, it can be divided into It is divided into curing type sealant and non-curing type sealant. The application range of sealant is very wide, and it can bond leather, glass, metal, doors and windows, plastics, textiles, etc. [0003] Most of the sealant products currently on the market cannot meet the performance requirements o...

AI Technical Summary

Problems solved by technology

[0003] Most of the sealant products currently on the market cannot meet the performance requirements of high and low temperature at the same time, and the problem of degumming occurs in an environment with a wide range of temperature changes. Therefore, the current sealant cannot meet the requirements of the market. Therefore, it is urgent to develop a High and low temperature resistant sealant

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