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High-adhesion polysulfide sealant

A polysulfide sealant and high-adhesion technology, applied in the field of sealants, can solve problems such as increasing the adhesion performance of polysulfide sealants

Inactive Publication Date: 2010-12-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there is no report on the use of polyvinyl butyral to increase the bonding performance of polysulfide sealants.

Method used

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  • High-adhesion polysulfide sealant

Examples

Experimental program
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Effect test

Embodiment 1-6

[0033] Six formulations in Table 1 were used to prepare polysulfide adhesives.

[0034] The base paste (A component) and vulcanized paste (B component) are prepared and kneaded separately.

[0035] When weighing the base paste raw materials, first weigh solid materials such as nano-calcium carbonate, light calcium carbonate, titanium dioxide, carbon black, and fumed silica, and then weigh liquid materials such as liquid polysulfide rubber; after mixing the above liquid materials evenly, , and then mix them with the previously weighed solid materials in order, and fully wet them.

[0036] When preparing vulcanized paste, first weigh manganese dioxide and plasticizer and mix them evenly; then weigh other components, mix them and fully wet them.

[0037] The amount of diphenylguanidine should be adjusted according to different use environments. When the temperature is low, the amount should be increased appropriately, and the curing cycle should be adjusted to about 7 days.

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Abstract

The invention discloses a high-adhesion polysulfide sealant, which comprises base paste and vulcanizing paste. The base paste comprises 30 to 70 percent of liquid polysulfide rubber, 20 to 60 percent of filler, 0.5 to 10 percent of thickener, 5 to 20 percent of plasticizer and 0 to 5 percent of assistant, wherein the thickener polyvinyl butyral and adjusting the adhesive property of the sealant. The vulcanizing paste comprises 25 to 70 percent of vulcanizing agent, 25 to 70 percent of plasticizer and 0.5 to 5 percent of vulcanization accelerator. The mixing weight ratio of the base paste to the vulcanizing paste is 100:6-14. The invention also discloses a method for preparing the polysulfide sealant. The sealant and the method are characterized in that: the polyvinyl butyral is used as the thickener; the adhesive strength of the polysulfide sealant is improved; the use cost of the materials is low; the process is stable; and the repeatability is high. The material of the invention can be used for adhering sealing parts of airplanes, rapid trains, automobiles and the like. Therefore, the sealant has a high industrial application value.

Description

technical field [0001] The invention belongs to the technical field of sealants, in particular to a highly cohesive polysulfide glue sealing material and a preparation method thereof. Background technique [0002] The elastic polysulfide rubber compound formed by vulcanization is widely used as sealant in transportation, construction and petrochemical industries. The known polysulfide rubber sealant is usually a two-component sealing material formed by mechanically mixing liquid polysulfide rubber as a base, adding an appropriate amount of fillers, additives and curing agents. In modern industrial production, especially in the production of high-speed trains and aircraft, 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 high-speed trains and automobiles are made of polyurethane, which is easy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J181/04C09J11/08C09K3/10
Inventor 张启龙徐意李金峰杨辉樊先平汪海燕黄振晖
Owner ZHEJIANG UNIV
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