Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Branched polyorganosiloxanes and related curable compositions, methods, uses, and devices

A technology of polyorganosiloxane and silicone, which is applied in semiconductor/solid-state device components, electrical components, coatings, etc., and can solve problems such as increasing curing speed and affecting curing speed

Active Publication Date: 2018-02-16
DOW SILICONES CORP
View PDF39 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, for a given number of reactive groups, a higher concentration of reactive groups near the end of the polymer can lead to increased cure speed, as described in WO2014124364, and the accessibility of reactive groups can also affect cure speed

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Branched polyorganosiloxanes and related curable compositions, methods, uses, and devices
  • Branched polyorganosiloxanes and related curable compositions, methods, uses, and devices
  • Branched polyorganosiloxanes and related curable compositions, methods, uses, and devices

Examples

Experimental program
Comparison scheme
Effect test

example

[0174] Several structures were synthesized to provide examples to support the description of the utility of the curable silicone composition. Seven different radically curable branched polyorganosiloxanes of the present invention (I) were synthesized and referred to as Polymers 1 to 7 (or abbreviated as "Pol 1" to "Pol 7"), these polyorganosiloxanes There are various structures consistent with the disclosed structures given herein for the free radically curable branched polyorganosiloxane of component (I). For comparison, two other structures generally known in the art were also synthesized. Comparative Polymer A is a linear polyorganosiloxane with methacrylate functionality at the end. Comparative polymer B is a linear polyorganosiloxane with aggregated methacrylate functional groups at the ends, as disclosed in patent WO 2014124364. The number of reactive groups in a given weight of Polymers 1 to 7 or Comparative Polymers A or B varied and was not consistent. We added an ...

example 1

[0186] Example 1: Preparation of Polymer 1 (Pol1). To prepare the acrylate-functionalized branched polyorganosiloxane (for polymer 1 in Example 1), a mixture of 9 millimoles (mmol) of [SiO 4 / 2 ] 1 [Si(CH 3 ) 2 O] 150 [SiR(CH 3 ) 2 o 1 / 2 ] 4 (where R is approximately 85 mol% vinyl (-CH=CH 2 ) and 15mol% methyl (-CH 3 ) and a blend of 48 mmol of tetramethyldisiloxane and 10 ppm of platinum as a catalyst. A molar ratio of 9 / 48 was set to allow an excess of tetramethyldisiloxane to minimize any chain extension in order to obtain the desired capping reaction. The blend was heated to a temperature of 50° C. and mixed for 30 minutes to allow the hydrosilylation reaction to complete, then stripped at 80° C. and a pressure below 10 Torr (1.3 kPa) for 1 hour. To the resulting residual Si-H functionalized species was added 100 ppm butylated hydroxytoluene, 100 ppm methyltriacetoxysilane and 100 ppm ethyltriacetoxysilane (both from DOW ETS 900) and 4.3 mmol allyl methacrylate...

example 2

[0188] Example 2: Preparation of Polymer 2 (Pol2). Polymer 2 used in Example 2 was prepared similarly to Polymer 1 of Example 1, except that the starting polymer was [SiO 4 / 2 ] 1 [Si(CH 3 ) 2 O] 400 [SiR(CH 3 ) 2 o 1 / 2 ] 4 , where R is about 88.5 mol% vinyl (-CH=CH 2 ) and 12.5mol% of methyl (-CH 3 ) to obtain an example Pol2 of a radically curable branched polyorganosiloxane (I) having the following formula: (SiO 4 / 2 ) 1 (R 1 2 SiO) 400 (R2 R 1 2 SiO 1 / 2 ) 3.5 (R 1 3 SiO 1 / 2 ) 0.5 (R 3 ) 3.5 , where R 1 for CH 3 , R 2 for -Si(CH 3 ) 2 -O-Si(CH 3 ) 2 -(CH 2 ) 3 o 2 CC(CH 3 )=CH 2 and R 3 for CH 2 CH 2 .

[0189] Example 2a: The blend of Example 2a was obtained by blending Pol2 of Example 2 with Dil1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A branched polyorganosiloxane having, on average, at least two radical-curable groups per molecule and a curable silicone composition that comprises (I) the branched polyorganosiloxane and (II) a radical initiator. Cured products prepared therefrom. Devices containing the branched polyorganosiloxane, composition, or cured product. Methods of making the branched polyorganosiloxane and composition and methods of using and uses of the materials and devices.

Description

[0001] The present invention relates generally to branched polyorganosiloxanes, compositions comprising the branched polyorganosiloxanes, cured products prepared from the compositions, preparation and use of the branched polyorganosiloxanes, compositions and curing Methods of producing, devices containing the branched polyorganosiloxanes, compositions and cured products, and uses thereof. Background technique [0002] The polyorganosiloxane composition can be prepared by mixing components comprising a polydiorganosiloxane having curable groups or reactive groups with a crosslinking agent and / or a catalyst as required. Different types of curable groups such as hydrolyzable groups, free radical curable groups and / or thermally curable groups can be used. Generally, the polydiorganosiloxane has more than 2 reactive groups per chain. Compositions comprising these components can then be cured to prepare elastomeric materials, for example, by exposing the composition to atmospheric ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08G77/44C08G77/20C08G77/12C08L83/04C08L83/07C08L83/05C09J183/04C09J183/07C09J183/05
CPCC08G77/12C08G77/20C08G77/44C08L83/04C09J183/04C08G77/50C08L83/14H01L23/296C08L83/00C08G77/08C08G77/14C08G2261/132B32B7/12C09J2203/326C09J2483/00B32B2255/26
Inventor M·L·布拉德福德艾丽安·艾德莱·塔恩唐吟阿福鲁兹·A·扎里斯菲
Owner DOW SILICONES CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com