High-weather-fastness polysulfide sealant

A technology of polysulfide sealant and weather resistance, which is applied in the field of sealant, can solve the problems of insufficient weather resistance of polysulfide sealant, and achieve the effect of inhibiting free radical reaction, improving weather resistance and good mechanical properties
CN102838964BActive Publication Date: 2014-01-08ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2014-01-08

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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.
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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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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