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Room-temperature vulcanized antiflaming single-component dealcoholization-type silicone rubber sealant and preparation method thereof

A room temperature vulcanization, silicone rubber technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of mechanical properties decline, affecting the electrical properties of the sealant, and high hardness of the sealant, and achieve the effect of reducing the amount of addition.

Active Publication Date: 2012-05-23
TONSAN ADHESIVES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the halogen-free requirements of the electronics industry and the harmful gases released by halogen-based flame retardants during the flame-retardant process, the application of halogen-based flame retardants in the electronics industry is limited; and inorganic flame retardants need to be added in sealants. A large quantity can achieve a good flame retardant effect. Adding a large amount of inorganic flame retardants will increase the hardness of the sealant and reduce the mechanical properties. At the same time, adding a large amount of certain inorganic flame retardants, such as inorganic aluminum hydroxide, will seriously Affect the electrical properties of the sealant

Method used

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  • Room-temperature vulcanized antiflaming single-component dealcoholization-type silicone rubber sealant and preparation method thereof

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Embodiment 1

[0029] The silicone rubber sealant of the present invention includes (A)-(J) components, and the mass parts of each component are as follows:

[0030] (A) 50 parts of α, ω-divinyl polydimethylsiloxane

[0031] (B) 7.5 parts of polydimethylsiloxane whose end group is hydrogen

[0032] (C) 1.5 parts of vinyltrimethoxysilane

[0033] (D) 2 parts of platinum catalyst

[0034] (E) 4 parts of fumed white carbon black

[0035] (F) 20 parts of inorganic flame retardant aluminum hydroxide

[0036] (G) 6 parts of cross-linking agent

[0037] (H) 4 parts of titanate catalyst

[0038] (1) 3 parts of silane coupling agent

[0039] (J) Hydroxyl and moisture scavenger 2 parts

[0040] Wherein the (A) component is α, ω-divinylpolydimethylsiloxane with a viscosity of 10000cps at 25°C; the (B) component is a hydrogen-terminated silicone oil with a molecular weight of 1000; the ( C) component is vinyltrimethoxysilane; (D) component is platinum catalyst; (E) component is fumed white carbo...

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Abstract

The invention discloses a room-temperature vulcanized antiflaming single-component dealcoholization-type silicone rubber sealant and a preparation method thereof. The room-temperature vulcanized antiflaming single-component dealcoholization-type silicone rubber sealant comprises 40-60 parts of alpha, omega-divinyl polydimethylsiloxane (A), 5-15 parts of polydimethylsiloxane (B) the end group of which is hydrogen group, 1-5 parts of vinyltrimethoxysilane (C), 1-5 parts of platinum catalyst (D), 1-10 parts of gas phase method white carbon black (E), 15-30 parts of inorganic fire retardant (F), 5-10 parts of crosslinker (G), 2-8 parts of titanate catalyst (H), 1-5 parts of silane coupling agent (I) and 1-3 parts of hydroxyl and moisture scavenger (J). The preparation method comprises: evenlymixing components (A), (B) and (C) under the protection of N2; adding (D), reacting for 4 hours to finish blocking under the protection of N2; when the vacuum degree is more than -0.09, removing bubble for 10-30 minutes; successively adding components (F), (J) and (E); evenly mixing when the vacuum degree is more than -0.09; adding components (G), (H) and (I); and reacting for 30-60 minutes when the vacuum degree is more than -0.09.

Description

technical field [0001] The invention relates to a silicone rubber sealant and a preparation method, in particular to a room temperature vulcanized flame-retardant single-component dealcoholized silicone rubber sealant and a preparation method. Background technique [0002] At present, the flat panel display technology with Japan, South Korea, Taiwan and China as the main markets is developing rapidly. TFT-LCD will quickly occupy the audio-visual market, and the driving transformers matching the LCD display will begin to be produced in China. Since the output end of the driving transformer matching the LCD is high frequency and high voltage, it needs to be packaged with silica gel to increase the creepage distance, prevent breakdown, and play the role of insulation and moisture resistance. [0003] The output end of the drive transformer for liquid crystal displays is mainly sealed with room temperature vulcanized single-component dealcoholized silica gel. This type of silica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L83/05C08K13/02C08K5/5425C08K3/36C08K3/22C08K5/5419C09K3/10
Inventor 苏丹李印柏翟海潮王兵
Owner TONSAN ADHESIVES INC
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