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Room-temperature vulcanized organic polyorganosiloxane composition and preparation method

A technology of organopolysiloxane and room temperature vulcanization, which is applied in the field of organopolysiloxane composition and preparation, and can solve the problems of poor bonding performance, decreased strength and hardness, and poor initial bonding performance of backsheet materials, and achieves Good initial bonding and durable bonding, improved strength and hardness retention, and improved high temperature and high humidity aging resistance

Active Publication Date: 2010-07-14
富乐(苏州)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the strength and hardness of the silicone sealants produced on the market are often severely reduced after high-temperature and high-humidity aging, and the white products will also produce serious yellowing phenomenon, and the bonding performance to the backplane material is poor, which is manifested as poor initial bonding performance. Or it can be bonded initially but the bonding performance decreases after high temperature and high humidity aging. Some silicone sealants have poor compatibility with EVA, and EVA will turn yellow after a period of contact with EVA

Method used

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  • Room-temperature vulcanized organic polyorganosiloxane composition and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1, select the hydroxyl-terminated polydimethylsiloxane whose viscosity is 6000mPa.s, and the dimethicone oil whose viscosity is 1000mPa.s, the components are as follows:

[0016] Hydroxy-terminated polydimethylsiloxane 100

[0017] Simethicone 20

[0018] Calcium carbonate 50

[0019] Aluminum oxide 30

[0020] White corundum 10

[0021] Fumed silica 10

[0022] Rutile titanium dioxide 15

[0023] 2,4-Dihydroxybenzophenone 0.5

[0024] Methyltributanoximinosilane 2

[0025] Vinyl tributylketoxime silane 7

[0026] γ-Mercaptopropyltrimethoxysilane 1.5

[0027] γ-Aminopropyltrimethoxysilane 0.5

[0028] Dibutyltin diacetylacetonate 0.5

[0029] Add the hydroxyl-terminated polydimethylsiloxane, dimethyl silicone oil, and fillers of the above-mentioned viscosity and parts into the stirring tank, stir at 110-130°C, 0.09-0.1Mpa vacuum for 2-4 hours, then cool down to 40 Below ℃, add the rutile titanium dioxide, 2,4-dihydroxybenzophenone, methyl tributylketo...

Embodiment 2

[0030] Example 2, select the hydroxyl-terminated polydimethylsiloxane with a viscosity of 6000mPa.s, and the dimethicone oil with a viscosity of 1000mPa.s, the components of which are as follows:

[0031] Hydroxy-terminated polydimethylsiloxane 100

[0032] Simethicone 20

[0033] Calcium carbonate 40

[0034] Microsilica 20

[0035] Aluminum hydroxide 25

[0036] Fumed silica 15

[0037] Rutile titanium dioxide 15

[0038] Phenyl salicylate 0.3

[0039] Methyltributanoximinosilane 2

[0040] Vinyl tributylketoximosilane 9

[0041] γ-Glycidoxypropyltrimethoxysilane 1

[0042] γ-Aminopropyltrimethoxysilane 1

[0043] Stannous octoate 0.5

[0044] A room temperature vulcanizing organopolysiloxane composition for solar cells was prepared according to the method described in Example 1 above.

Embodiment 3

[0045] Example 3, select 20000mPa.s of hydroxyl-terminated polydimethylsiloxane, 500mPa.s of dimethyl silicone oil, and its components are as follows:

[0046] Hydroxy-terminated polydimethylsiloxane 100

[0047] Simethicone 20

[0048] Aluminum oxide 50

[0049] Aluminum hydroxide 25

[0050] White corundum 10

[0051] Fumed silica 15

[0052] Rutile titanium dioxide 15

[0053] 2,4-Dihydroxybenzophenone 0.5

[0054] Tetrabutanoximinosilane 2

[0055] Vinyl tributylketoxime silane 7

[0056] γ-Glycidoxypropyltrimethoxysilane 1

[0057] r-Methacryloxypropyltrimethoxysilane 1

[0058] Dibutyltin diacetylacetonate 0.5

[0059] According to the method of Example 1, a room temperature vulcanizing organopolysiloxane composition for solar cells was prepared.

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Abstract

The invention discloses a room-temperature vulcanized organic polyorganosiloxane composition and a preparation method thereof. The composition comprises 100 parts of hydroxy-terminated polydimethylsiloxane with viscosity of 3,000 to 100,000mPa.s, 10 to 30 parts of dimethicone with viscosity of 50 to 5,000mPa.s, 50 to 250 parts of filler, 5 to 20 parts of rutile titanium white powder paint, 0.5 to 2 parts of water absorbent, 0.1 to 1 part of ultraviolet absorbent, 5 to 15 parts of cross linker, 2 to 5 parts of coupling agent, and 0.1 to 1 part of catalyst. The composition is prepared by adding 100 parts of the hydroxy-terminated polydimethylsiloxane with viscosity of 3,000 to 100,000mPa.s, 10 to 30 parts of the dimethicone with viscosity of 50 to 5,000mPa.s and 50 to 250 parts of the filler into a stirring kettle, stirring the mixture for 2 to 4 hours at the temperature of between 110 DEG C and 130 DEG C under the vacuum condition of 0.09 to 0.1MPa, then cooling the mixture to below 40 DEG C, adding the water absorbent, the ultraviolet absorbent, the cross linker, the coupling agent and the catalyst in part into the stirring kettle and stirring the mixture uniformly.

Description

technical field [0001] The invention relates to an organopolysiloxane composition and a preparation method, in particular to a room temperature vulcanizing organopolysiloxane composition for solar cells and a preparation method. Background technique [0002] At present, the strength and hardness of the silicone sealants produced on the market are often severely reduced after high-temperature and high-humidity aging, and the white products will also produce serious yellowing phenomenon, and the bonding performance to the backplane material is poor, which is manifested as poor initial bonding performance. Or it can be bonded initially but the bonding performance decreases after high temperature and high humidity aging. Some silicone sealants have poor compatibility with EVA, and EVA will turn yellow after being in contact with EVA for a period of time. Contents of the invention [0003] In order to solve the deficiencies of the prior art, the present invention provides a roo...

Claims

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Application Information

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IPC IPC(8): C08L83/06C08L83/04C08K13/02C08K3/26C08K3/22C08K3/36C08K5/132C08K5/5465C08K5/548C08K5/544C08K3/34C08K5/134C08K5/5435C08K5/5425
Inventor 王德波李志梅苏丹郑妙生
Owner 富乐(苏州)新材料有限公司
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