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Cementation type polysulfide sealant

A sealant and vulcanizing agent technology, applied in the chemical field, can solve the problems of hydrocarbon solvent resistance, poor atmospheric aging resistance, harsh use environment requirements, and no flame retardant effect, and achieves the effect of a simple preparation process.

Active Publication Date: 2007-05-09
XIAN AIRCRAFT BRANCH OF XIAN AIRCRAFT INT
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the performance index of polysulfide sealants for aircraft is good, the production cost is high and the operating environment is harsh, which limits the application on maglev high-speed trains and automobiles; although other polysulfide sealants are easy to construct and low in cost, they do not have Flame retardant, and the performance index does not meet the requirements of maglev high-speed train body sealing riveting and automobile body bonding and sealing
[0003] Most of the known sealants for automobiles are single-component polyurethanes, which are easy to construct and have good comprehensive properties. However, polyurethane sealants have poor resistance to hydrocarbon solvents and atmospheric aging, and do not have flame retardancy. Limit its application on maglev high-speed trains

Method used

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  • Cementation type polysulfide sealant
  • Cementation type polysulfide sealant

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Embodiment Construction

[0092] Below in conjunction with embodiment the present invention is further described.

[0093] The adhesive polysulfide sealant of the present invention was prepared according to the preparation method specified in the present invention by adopting the 4 formulations in Table 1.

[0094] 1. The base paste (component A) and vulcanized paste (component B) are prepared and mixed (closed) separately.

[0095] 2. When weighing the base paste raw materials, first weigh the solid material, then weigh the liquid material; after weighing a small dose of liquid material, mix it with a large dose of liquid material, and then mix it with the solid material to fully moisten it.

[0096] 3. When preparing vulcanized paste, first weigh manganese dioxide and phthalic anhydride, then weigh chlorinated paraffin and mix well, then weigh other components and mix well to fully moisten.

[0097] 4. The components of manganese dioxide, diphenylguanidine and phthalic anhydride can be properly adju...

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Abstract

This invention discloses a bi-component polysulfide rubber sealant with MnO2 as the curing agent. The polysulfide rubber sealant has binding, sealing and flame-retarding functions. This invention utilizes epoxy resin to modified liquid polysulfide rubber, thus increasing the binding strength, breaking elongation rate and peel strength of the polysulfide rubber sealant. Besides, the polysulfide rubber sealant has flame-retarding effect due to the addition of flame retardant. The polysulfide rubber sealant can satisfy the binding and sealing requirements of magnetic suspending trains and automobiles.

Description

Technical field [0001] The invention belongs to the technical field of chemistry, in particular to a two-component liquid polysulfide rubber sealant. Background technique [0002] Liquid polysulfide rubber compositions that vulcanize to form elastomers are widely used as sealants in the aircraft, construction, and petrochemical industries. The known polysulfide rubber sealant is a two-component sealing material formed by mechanically mixing liquid polysulfide rubber as the main agent, adding appropriate amount of fillers and auxiliary agents. In modern industrial production, especially in the production of high-speed trains and automobiles, sealants are required to have dual functions of sealing and bonding, and at the same time, sealants are required to have properties such as flame retardancy, anti-aging, air permeability and good flexibility. Although the performance index of polysulfide sealants for aircraft is good, the production cost is high and the operating environ...

Claims

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Application Information

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IPC IPC(8): C09K3/10C08L81/04C08K5/56C08L63/00C08L91/06C08K3/26C08K5/07
Inventor 靳耿栓
Owner XIAN AIRCRAFT BRANCH OF XIAN AIRCRAFT INT
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