High-weather-fastness polysulfide sealant

A polysulfide sealant and weather resistance technology, which is applied in the field of sealants, can solve the problems of insufficient weather resistance of polysulfide sealants, achieve the effects of inhibiting free radical reactions, excellent mechanical properties, and improving weather resistance

Active Publication Date: 2012-12-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the disclosed technical scheme improves the mechanical properties of the polysulfide sealant through graphene oxide, the weather resistance of the polysulfide sealant still has deficiencies

Method used

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  • High-weather-fastness polysulfide sealant

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Experimental program
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Embodiment Construction

[0066] The present invention is further described below in conjunction with embodiment.

[0067] Six formulations in Table 1 were used to prepare polysulfide sealant and high weather resistance polysulfide sealant of the present invention.

[0068] The base paste (A component) and vulcanized paste (B component) are prepared and kneaded separately.

[0069] When weighing the raw materials of the base paste, first weigh the solid materials such as nano-calcium carbonate, light calcium carbonate, titanium dioxide, carbon black, antioxidant, and anti-ultraviolet agent according to Table 1, and then weigh the liquid materials such as liquid polysulfide glue; After the above liquid material is mixed evenly, it is then mixed evenly with the previously weighed solid material, fully wetted, and repeatedly ground until a uniform paste is obtained, that is, the base paste.

[0070] When preparing the vulcanized paste, first weigh butyl benzyl phthalate, manganese dioxide and lead dioxid...

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Abstract

The invention discloses high-weather-fastness polysulfide sealant, which comprises base cream and vulcanizing cream, wherein the base cream comprises the components by weight: 30-70% of liquid polysulfide rubber, 20-60% of padding, 1-10% of tackifier, 3-20% of plasticizer, 0.3-5% of coupling agent, 0.1-2% of antioxidant and 0.05-1% of anti-ultraviolet agent; the vulcanizing cream comprises the components by weight: 25-70% of vulcanizing agent, 25-70% of plasticizer and 0.5-5% of vulcanization accelerator; and the mixed weight ratio of the base cream to the vulcanizing cream is 100 to (6-14). The invention also discloses a preparation method of the polysulfide sealant. The invention also discloses a preparation of the high-weather-fastness polysulfide sealant. The polysulfide sealant is characterized in that the weather fastness of the sealant is improved by the antioxidant and the anti-ultraviolet agent; the material cost is low, the process is stable, and the reproducibility is good. The high-weather-fastness polysulfide sealant disclosed by the invention can be used for bonding sealing elements of buildings, ships, high-speed trains, automobiles and the like, therefore, the high-weather fastness polysulfide sealant has a great application value in industry.

Description

technical field [0001] The invention belongs to the technical field of sealants, in particular to a highly weather-resistant polysulfide sealant. Background technique [0002] The elastic polysulfide rubber compound formed by vulcanization is widely used as sealant in transportation, construction and petrochemical industries. Known polysulfide sealants are usually two-component sealing materials that are mechanically mixed with liquid polysulfide rubber as the base, adding appropriate amount of fillers, additives and curing agents. In modern industrial production, especially in the application of construction industry and vehicles, the sealant is required to have dual functions of sealing and bonding, and at the same time, the sealant is required to have properties such as aging resistance, fatigue resistance and good flexibility. Most of the known sealants for buildings, automobiles and high-speed trains use silicones, polyurethanes and polysulfides. Silicone-based sealan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J181/04C09J11/04C09K3/10
Inventor 张启龙滕晓波徐意李恒奎杨辉樊先平
Owner ZHEJIANG UNIV
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