Addition-crosslinking silicone resin compositions

A technology of siloxane resin and composition, which is applied in the direction of instruments, optical components, optics, etc., and can solve the problems of not being able to use heat-sensitive components at the same time

Inactive Publication Date: 2009-05-27
WACKER CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, heat-sensitive components such as electronic components or molds of organic polymer materials cannot be used at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0136] Put 100 parts with (PhSiO 3 / 2 ) 0.43 (MeViSiO) 0.14 (MeHSiO) 0.18 (Me 3 SiO 1 / 2 ) 0.25 Composition of polysiloxane with 20 parts (MeViSiO) 0.9 (Me 2 SiOH) 0.1 Composition of polysiloxane, 6 parts with (MeHSiO) 4 Composition of polysiloxane and 0.04 parts (based on platinum), platinum-1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex as a hydrosilylation catalyst Mix together. A mixture with a viscosity of 520 cSt at a temperature of 25°C was prepared, and the mixture was cured in a mold at a temperature of 150°C for 1 hour. The formed molded product is transparent like glass, and its Shore D hardness is 64.

Embodiment 2

[0140] Put 100 parts with (PhSiO 3 / 2 ) 0.43 (MeViSiO) 0.14 (MeHSiO) 0.18 (Me 3 SiO 1 / 2 ) 0.25 Composition of polysiloxane with 30 parts (MeViSiO) 0.9 (Me 2 SiOH) 0.1 Composition of polysiloxane, 6 parts with (MeHSiO) 4 Composition of polysiloxane and 0.04 parts (based on platinum), platinum-1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex as a hydrosilylation catalyst Mix together. A mixture with a viscosity of 450 cSt at a temperature of 25°C was prepared. The mixture was cured in a mold at a temperature of 150°C for 1 hour. The resulting molded product is transparent like glass, and its Shore D hardness is 52.

Embodiment 3

[0142] Put 100 parts with (PhSiO 3 / 2 ) 0.43 (MeViSiO) 0.14 (MeHSiO) 0.18 (Me 3SiO 1 / 2 ) 0.25 Composition of polysiloxane with 36 parts (MeViSiO) 0.9 (Me 2 SiOH) 0.1 Composition of polysiloxane, 6 parts with (MeHSiO) 4 Composition of polysiloxane and 0.04 parts (based on platinum), platinum-1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex as a hydrosilylation catalyst Mix together. A mixture with a viscosity of 390 cSt at a temperature of 25°C was prepared. The mixture was cured in a mold at a temperature of 150°C for 1 hour. The resulting molded product is transparent like glass, and its Shore D hardness is 40.

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Abstract

Addition crosslinking siloxane resin composition, which comprises (1) 100 parts by weight of general formula R 1 a R 2 b R 3 c SiO (4-a-b-c) / 2 (1) polyorganosiloxane, (2) 50 to 200 parts by weight of general formula R 1 d h 2 e R 3 f SiO (4-d-e-f) / 2 The polyorganosiloxane of (II), or (3) 200 parts by weight of general formula R of (substituting components (1) and (2)) 1 g R 2 h R 3 i h k SiO (4-g-h-i-k) / 2 (III) polyorganosiloxane, (4) 1 to 100 parts by weight of general formula R 1 l R 2 m R 3 n SiO (4-l-m-n) / 2 (IV) Alkenyl-rich polyorganosiloxane, and (5) 1 to 100 parts by weight hydrogen-rich formula R (additionally or in place of component (4)) 1 o h p R 3 q SiO (4-o-p-g) / 2 (V) a polyorganosiloxane, and (6) a sufficient amount of catalyst.

Description

Technical field [0001] The present invention relates to addition-crosslinking silicone resin compositions. Background technique [0002] Add-crosslinking siloxanes have long been known in the elastomer industry, such as RTV-2 rubber, liquid rubber, and addition-crosslinking thermal rubber. The characteristics of these materials are: after curing, their hardness is in the range of Shore A or in the range of <20 Shore D. [0003] The corresponding cross-linkable material is a product including at least two components, which always contain cross-linking functional groups Si-H and Si-vinyl groups, respectively. [0004] US 2002 / 0161140 A1 describes an addition-crossover biphenyl siloxane resin composition, the hardness of the cured siloxane resin is in the range of Shore D>60. However, in order to avoid too long curing time, the curing temperature must be 200°C. Therefore, heat-sensitive components, such as electronic components or molds made of organic polymer materials, canno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08J3/24C08J5/00C08L83/07C08G77/12C08L83/05G02B1/04
CPCC08G77/70C08G77/18G02B1/04C08G77/16C08G77/20C08G77/12C08L83/04C08L83/00
Inventor 格哈德·施泰格沃尔夫冈·沙滕曼
Owner WACKER CHEM GMBH
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