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Bi-component polysulfide sealant composition, bi-component polysulfide sealant and preparation method

A polysulfide sealant, a two-component technology, applied in the field of sealants, can solve the problems of difficult dispersion, large density difference between microbeads and the system, inconvenient storage and use, etc.

Inactive Publication Date: 2021-09-10
快思瑞科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the existing technology can introduce hollow glass microspheres as fillers in the sealant system, which reduces the density of the sealant, the compatibility between the hollow microspheres and the sealant system is poor and they are easily broken during the stirring process; Organic hollow microbeads are added to the system, which improves the compatibility with the system, but the density difference between the microbeads and the system is large, it is difficult to disperse, and it is easy to separate, which causes great inconvenience to storage and use.

Method used

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  • Bi-component polysulfide sealant composition, bi-component polysulfide sealant and preparation method

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preparation example Construction

[0034] The embodiment of the present application also provides a method for preparing a mercapto-terminated liquid polysulfide rubber sealant, comprising the following steps:

[0035](1) Weigh 100 parts of liquid polysulfide rubber, 10-70 parts of reinforcing filler, 0.5-5 parts of expandable microspheres, 5-15 parts of thixotropic agent, and 0.5-1.5 parts of catalyst into a planetary mixer and stir evenly. That is, component A is obtained;

[0036] (2) Store the component A and the epoxy resin constituting the component B in airtight storage respectively. When using, mix well and evenly according to the weight ratio to obtain a two-component polysulfide sealant.

[0037] In one embodiment, the weight ratio may be 100:(5-15), preferably, the weight ratio may be 100:(10-15).

[0038] The embodiment of the present application also provides a two-component polysulfide sealant, which is prepared by the above-mentioned two-component polysulfide sealant preparation method.

[0039...

Embodiment 1

[0041] 1. Stir 100 parts of calcium carbonate at 70°C for 10 minutes at high speed, add 0.1 part of stearic acid, and continue stirring for 40 minutes to obtain surface-modified calcium carbonate.

[0042] 2. Weigh 100 parts of liquid polysulfide rubber, 10 parts of modified calcium carbonate, 1 part of expandable microspheres, 15 parts of fumed silica, and 0.5 parts of tetramethylethylenediamine and stir them evenly in a planetary mixer to obtain A components.

[0043] 3. B component is bisphenol A epoxy resin.

[0044] 4. When using, mix components A and B uniformly at a ratio of 100:10.

Embodiment 2

[0051] 1. Stir 100 parts of silicon dioxide at 90°C for 15 minutes at high speed, add 3 parts of lauric acid, and continue stirring for 30 minutes to obtain surface-modified silicon dioxide.

[0052] 2. Weigh 100 parts of liquid polysulfide rubber, 70 parts of modified silicon dioxide, 0.5 parts of expandable microspheres, 5 parts of hydrogenated castor oil, and 1.5 parts of dimethyl benzylamine and put them into a planetary mixer and stir evenly to obtain Group A point.

[0053] 3. B component is bisphenol A epoxy resin.

[0054] 4. When using, component A and component B are mixed uniformly at a ratio of 100:5.

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Abstract

The invention provides a bi-component polysulfide sealant composition, a bi-component polysulfide sealant and a preparation method of the bi-component polysulfide sealant, and belongs to the field of sealants. The bi-component polysulfide sealant composition specifically comprises a component A and a component B, the component A comprises the following components in parts by weight: 100 parts of liquid polysulfide rubber, 10-70 parts of a reinforcing filler, 0.5-5 parts of expandable microspheres, 5-15 parts of a thixotropic agent and 0.5-1.5 parts of an amine catalyst; and the component B comprises 5-15 parts of epoxy resin. By means of the treatment scheme, the density of the sealant can be remarkably reduced, and rapid curing can be achieved after the two components of the sealant are mixed.

Description

technical field [0001] The invention relates to the field of sealants, in particular to a two-component polysulfide sealant composition, a two-component polysulfide sealant and a preparation method thereof. Background technique [0002] Polysulfide sealant refers to a sealant with liquid polysulfide rubber as the main component. After curing, the polysulfide sealant becomes a soft rubber elastic body, which has special oil resistance, solvent resistance and aging resistance, and has excellent air tightness, water tightness and low temperature flexibility, and because of its excellent durability, it can be maintained for a long time its performance. These excellent properties of polysulfide sealant make it widely used in industries such as aviation, aerospace, construction, automobile, shipbuilding, machinery, petrochemical industry and electrical instrumentation. In some fields, it cannot be replaced by other materials. With the development of industrial technology, higher...

Claims

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Application Information

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IPC IPC(8): C09J181/04C09J11/06C09J163/02C09J163/04
CPCC09J181/04C09J11/06C08L63/00C08K9/10C08K5/01C08L63/04
Inventor 汪丹越刘雪云
Owner 快思瑞科技(上海)有限公司
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