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Bi-component room-temperature cured silicone sealant

A room temperature curing and sealant technology, applied in the field of sealants, can solve the problems of unsatisfactory curing speed and unsatisfied

Active Publication Date: 2011-08-31
HONEYWELL INTEGRATED TECH CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] CN1222576C describes a two-component room temperature curing silicone sealant, but its curing speed is still unsatisfactory, and the prepared samples need 18 to 24 hours to be cured
[0006] Thus, while there has been a need in the art for a sealant with moderate pot life and fast deep cure, this need remained unmet prior to the present invention

Method used

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  • Bi-component room-temperature cured silicone sealant
  • Bi-component room-temperature cured silicone sealant
  • Bi-component room-temperature cured silicone sealant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Preparation of component A of two-component room temperature curing sealant

[0082] 45 parts by weight of hydroxyl-terminated polydimethylsiloxane (107 glue, 20,000 centipoise), methyl-terminated polydimethylsiloxane (201 silicone oil, viscosity of 1000 centipoise; 10 parts by weight; filler: calcium carbonate powder 45 parts by weight, uniformly mixed in a mixer, packed for later use.

[0083] Preparation of component B of two-component room temperature curing sealant

[0084] Under water-proof conditions, first mix 57 parts by weight of methyl-terminated polydimethylsilicone oil (201 silicone oil), 7 parts by weight of white carbon black that has been surface-treated, vacuumize, dehydrate and mix; add methyl trimethicone after cooling to room temperature 25 parts by weight of a mixture of ethoxysilane and methyl tributylketoxime silane 1:1 (weight ratio), vacuumize and mix; finally add the silane adhesion promoter γ-aminopropyltriethoxysilane (AMEO ) and 10 parts b...

Embodiment 2

[0086] Keeping the other components in Example 1 unchanged, only the crosslinking agent in component B was replaced with a mixture of tetraethoxysilane and methyltributanoximinosilane at a ratio of 1:1 (by weight).

Embodiment 3

[0088] Keeping the other components in Example 1 unchanged, only the crosslinking agent in component B was replaced by a mixture of methyltriethoxysilane and methyltributanoximinosilane in a ratio of 2:3 (by weight).

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PUM

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Abstract

The invention relates to bi-component room-temperature cured silicone sealant, which contains an A component and a B component, wherein the A component contains hydroxyl-terminated poly-diorganic-based siloxane; the B component contains a mixture of alkoxysilane and ketoxime silane, which is used as a cross-linking agent, or alkoxyl-ketoxime hybrid silane; and the A component and the B component are arranged in independent packages respectively. The sealant has an appropriate application period and high deep layer curing speed. The sealant further has excellent moisture and heat resistance and UV (ultraviolet) aging resistance, thus being particularly applicable to being used as the sealant for packaging components in solar industries.

Description

technical field [0001] The invention relates to a sealant, more specifically to a two-component room temperature curing silicone sealant. Background technique [0002] Silicone sealants cured at room temperature are widely used in many fields due to their excellent weather resistance, such as building sealing bonding, electronic material potting, and packaging of automotive mechanical gaskets and solar panel components. The curing of one-component silicone sealant is from the surface to the inside, and the curing speed depends not only on the reaction speed of the crosslinking agent, but also on the speed of water penetration in the air. Usually one-component silicone sealants need more than 3 days to fully cure, which means that after applying the glue, you have to wait for a long time before moving or entering the next process. The curing of sealant has become a major bottleneck in production to improve production efficiency. For example, in the solar cell module packagi...

Claims

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Application Information

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IPC IPC(8): C09J183/06C09J11/06C09K3/10
Inventor 徐青林云刘川
Owner HONEYWELL INTEGRATED TECH CHINA
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