Anti-aging organic silicon pouring sealant and preparation method thereof

A silicone potting and anti-aging technology, applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems of easy yellowing, affecting the service life, aging, etc. effect, the effect of improving thermal stability and photostability

Inactive Publication Date: 2022-03-08
陈文娟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silicone potting adhesive is exposed to sunlight, high temperature and other conditi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1

[0031] Preparation packing:

[0032] Under nitrogen protection conditions, the amino dipheniline and anhydrous ethanol were mixed, and then 3-glycidyl ether oxyl triethoxysilane and 50 ml of anhydrous ethanol were added, and the constant temperature was 80 ° C for 12 h, and the reaction was concentrated under reduced pressure after completion The solvent is removed to obtain a modifier; the amount of the amount of aminoxane and 3-glycidyl ether oxyl triethoxysilane is 1: 1.2; no water ethanol as a solvent;

[0033] Dissolving the white carbon is dispersed in aqueous ethanol, and the pH is adjusted to 4 with acetic acid solution, then the modifier is added to at 60 ° C for 4 h; after the reaction is completed, the obtained suspension is cooled to room temperature, and the obtained is separated by centrifugation No water ethanol was washed 3 times and dried in a dry box at 80 ° C to give a filler. The volume fraction of the ethanol solution was 90%, the amount of ...

Example Embodiment

[0034] Example 2

[0035] Preparation Additives:

[0036] Step S11, 1, 2, 2, 6, 6-pentamhythylpiperidol, sodium hydroxide, and methyl trikylcylamine, mixed with toluene, stirred at a temperature of 20 ° C for 10 min, then three Poly chloride is dissolved in toluene, then warmed to 40 ° C, stirred at 40 ° C, stirred at the reaction, was filtered, the filtrate was washed with saturated brine, washed with anhydrous magnesium sulfate, then remove the solvent Receive an intermediate 1; wherein the molar ratio of 1,2,2,6,6-fivert methylpiperidol, tri chloride, sodium hydroxide, and methyl trikhtylcylamine is 0.022: 0.01: 0.025: 0.1; Toluene as a solvent,

[0037] Step S12, mixing the intermediate 1 and acetone under temperature at 0 ° C, then dissolved the ethanolamine in acetone, then sodium hydroxide, the temperature is maintained until the temperature is constant, continued to stir for 2 h, with anhydrous sulfuric acid Magnesium dried, then the solvent was concentrated under reduced ...

Example Embodiment

[0039] Example 3

[0040] Preparation Additives:

[0041]Step S11, 1, 2, 2, 6, 6-pentamhythylpiperidol, sodium hydroxide, and methyl trikylcylamine, mixed with toluene, stirred at a temperature of 20 ° C for 10 min, then three Poly chloride is dissolved in toluene, then warmed to 40 ° C, stirred at 40 ° C, stirred at the reaction, was filtered, the filtrate was washed with saturated brine, washed with anhydrous magnesium sulfate, then remove the solvent Receive an intermediate 1; wherein the molar ratio of 1,2,2,6,6-fivert methylpiperidol, tri chloride, sodium hydroxide, and methyl trikhtylcylamine is 0.022: 0.01: 0.025: 0.1; Toluene as a solvent,

[0042] In step S12, the intermediate 1 and acetone are mixed at a temperature of 10 ° C, and then diethanolamine is dissolved in acetone, then sodium hydroxide, keep the temperature unchanged, continue to stir it for 2 h, water with no water The magnesium sulfate is dried over, then the solvent is concentrated under reduced pressure to...

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Abstract

The invention relates to an anti-aging organic silicon pouring sealant and a preparation method thereof, and belongs to the technical field of organic silicon pouring sealants, and the preparation method comprises the following steps: mixing alpha, omega-dihydroxy polydimethylsiloxane and an auxiliary agent, uniformly stirring in vacuum, then adding an alkaline additive, continuously stirring, adding an acidic additive, continuously stirring, adding a curing agent, and uniformly stirring to obtain the anti-aging organic silicon pouring sealant. Adding a filler, performing vacuum dehydration, then adding dimethyl silicone oil, a cross-linking agent and a tin catalyst, and continuously stirring under a vacuumizing condition, so as to obtain the product. By adjusting the raw materials, the heat stability and light stability of the organic silicon pouring sealant are improved, and the anti-aging effect of the organic silicon pouring sealant is further improved. And the auxiliary agent reacts with alpha, omega-dihydroxy polydimethylsiloxane to terminate the alpha, omega-dihydroxy polydimethylsiloxane, and groups with light stability are combined with flame-retardant groups, so that the stability of the product is improved. By adding the filler, the mechanical property of the organic silicon pouring sealant can be improved.

Description

technical field [0001] The invention belongs to the technical field of silicone potting glue, and in particular relates to an anti-aging silicone potting glue and a preparation method thereof. Background technique [0002] Potting is the process of rationally arranging, assembling, connecting, and isolating and protecting electronic components from the environment. The function of potting is to strengthen the integrity of electronic components, improve the resistance to external damage, improve the insulation of internal circuits, and improve the waterproof and moisture-proof performance of electronic components. [0003] There are three main types of silicone potting compounds commonly used, namely one-component RTV silicone rubber, two-component condensation RTV silicone rubber and two-component addition RTV silicone rubber. Silicone potting adhesive is exposed to sunlight and high temperature for a long time, and it is easy to yellow and age, which will affect the servic...

Claims

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Application Information

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IPC IPC(8): C09J183/04C09J11/06C09J11/04
CPCC09J183/04C09J11/06C09J11/04C08L2201/08C08L2203/206C08K9/06C08K7/26C08K5/3492
Inventor 不公告发明人
Owner 陈文娟
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