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Single-component flame-retardant ketoxime-removed/dealcoholized room temperature vulcanized organosilicon sealant and preparation method thereof

A room temperature vulcanization and deketoxime technology, which is applied in chemical instruments and methods, adhesives, and other chemical processes, can solve the problems of increasing process complexity and production costs, slow vulcanization speed, and poor storage stability, and achieve excellent storage stability properties, good flame retardancy, and good mechanical properties

Active Publication Date: 2015-03-04
BAIMTEC MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Deketoxime type one-component room temperature vulcanizing silicone sealant has the advantages of high storage stability, fast vulcanization speed and good adhesion to various substrates, but has the disadvantages of slight corrosion to copper and strong odor
Dealcoholized one-component room temperature vulcanizing silicone sealant has the advantages of environmental protection, low odor, and no corrosion to substrates, but it also has disadvantages such as poor storage stability, slow vulcanization speed, and poor adhesion to various substrates.
In the fields of energy-saving lamps, LED lamps, and electronic and electrical components, one-component room temperature vulcanized silicone sealants that are flame-retardant, good in storage stability, non-corrosive to substrates, and good in adhesion to various substrates are required. Both deketoxime type and one-component dealcoholized room temperature vulcanizing silicone sealants are difficult to meet the application requirements
[0004] One-component deketoxime / alcohol type one-component room temperature vulcanizing silicone sealant combines the advantages of deketoxime and dealcoholized room temperature vulcanizing silicone sealant, but they basically do not contain flame retardants, and neither of them can produce flame retardant room temperature vulcanized silicone sealants, and some additional inorganic moisture scavengers, such as molecular sieves, anhydrous calcium chloride, etc., will increase the process complexity and production costs if thixotropic agents are added
None of the existing technologies is aimed at preparing a flame-retardant one-component room temperature vulcanizing silicone sealant

Method used

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  • Single-component flame-retardant ketoxime-removed/dealcoholized room temperature vulcanized organosilicon sealant and preparation method thereof
  • Single-component flame-retardant ketoxime-removed/dealcoholized room temperature vulcanized organosilicon sealant and preparation method thereof
  • Single-component flame-retardant ketoxime-removed/dealcoholized room temperature vulcanized organosilicon sealant and preparation method thereof

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Embodiment Construction

[0020] Below in conjunction with embodiment technical solution of the present invention will be described in further detail:

[0021] The composition and mass parts dosage of the sealant described in the technical solution of the present invention are shown in Table 1.

[0022] Taking each component of No. 1 in Table 1 as an example, the method for preparing a single-component flame-retardant deketoxime / alcohol room temperature vulcanizing silicone sealant is described in detail below:

[0023] Weigh each component according to the proportion, first put 100 parts of α, ω-dihydroxy polydimethylsiloxane and 1.5 parts of methyl tributylketoxime silane into a vacuum kneader, heat to 70℃~ 90°C, vacuumize to 0.06-0.09MPa and stir at a constant speed for 1h-1.5h, then add 20 parts of aluminum hydroxide and 50 parts of calcium carbonate and vacuumize to 0.06-0.09MPa at 60°C-80°C and stir at a constant speed for 1h ~1.5h, then put in 2.5 parts of methyl orthosilicate and 1.2 parts of ...

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Abstract

The invention provides a single-component flame-retardant ketoxime-removed / dealcoholized room temperature vulcanized organosilicon sealant and a preparation method thereof. The single-component flame-retardant ketoxime-removed / dealcoholized room temperature vulcanized organosilicon sealant is prepared from the following materials in parts by weight: 100 parts of alpha, omega-dihydroxy polydimethylsiloxane, 10-60 parts of a flame-retardant filler, 50-150 parts of a reinforcement filler, 1.5-2 parts of a ketoxime silane cross-linking agent, 1.5-3 parts of an alkoxysilane cross-linking agent, 1.5-3 parts of an adhesion promotor and 0.5-1.5 parts of a catalyst. The single-component flame-retardant ketoxime-removed / dealcoholized room temperature vulcanized organosilicon sealant is flame-retardant, has excellent high-temperature resistance and yellowing resistance, and has favorable bonding performance to various base materials, such as metal and plastics.

Description

technical field [0001] The invention relates to a single-component flame-retardant deketoxime / alcohol room-temperature vulcanized silicone sealant and a preparation method, belonging to the technical field of polymer materials and their production. Background technique [0002] One-component condensation type room temperature vulcanizing silicone sealant is the most common and most used room temperature vulcanizing silicone sealant. widely used. One-component condensation type room temperature vulcanizing silicone sealants can be divided into deketoxime type, deacidification type, dealcoholization type, deacetone type and deamidation type according to different crosslinking agents. The current practical application in engineering is mainly deketoxime type and deacidification type one-component room temperature vulcanizing silicone sealant. [0003] The deketoxime type one-component room temperature vulcanizing silicone sealant has the advantages of high storage stability, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J11/06C09J11/04C09K3/10
Inventor 刘梅范召东张鹏孙全吉吴娜
Owner BAIMTEC MATERIAL CO LTD
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