Maro Publications

Silicone Materials

Patent Abstracts

From 03/20/2014 
to 5/4/2012

Maro Topics

Silicone Materials: Notes

Silicone Materials: Patent Titles

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Patents with Abstracts

4. 8,372,504 
Transparent composite compound 

Bae et al of the Korea Advanced Institute of Science and Technology, South Korea,  developed a non-hydrolytic transparent composite with excellent transparency, heat resistance and a low thermal expansion coefficient.  This includes a glass filler dispersed in a crosslinked transparent resin produced by a non-hydrolytic reaction.  The non-hydrolytic transparent siloxane resin is a resin having Si--O (siloxane) bonds, a resin having at least one kind of heterometal bonds, including Si--O bonds.  When the transparent siloxane resin produced by a non-hydrolytic reaction forms a composite in combination with the glass filler, the composite shows high transparency and heat resistance, as well as a low thermal expansion coefficient. Therefore, the transparent composite composition is useful as a substrate for thin film transistor (TFT) devices, display devices and optical devices.  (RDC 2/19/2013)

3. 8,257,827 
Silicone composition and devices incorporating same
 
Shi et al of the University of California, California, developed a silicone having anti-microbial properties contains well distributed silica and nanoparticles of a noble metal.  Silica and nanoparticles of a noble metal are added to liquid vinyl-terminated polydimethylsiloxane.  A coupling agent is then added to the mixture and heated, the coupling agent comprising trialkoxysilane having a formula R1Si(OR2)3, wherein R1 is vinyl or allyl, and R2 is an alkyl radical having from 1 to 3 carbon atoms.  Trimethylsiloxy terminated polymethylhydrosiloxane is then added to the mixture and heated in the presence of a catalyst so as to cross-link and cure the same into a silicone elastomer.  In other cases of the trimethylsiloxy terminated polymethylhydrosiloxane, a peroxide is added to mixture and heated to form the silicone. In this later example, no catalyst is needed. (RDC 9/14/2012)

2. 8,217,107 
Rapid deep-section cure silicone compositions
 
Ramakrishnan and Nesakumar of Momentive Performance Materials Inc., New York, developed siloxane polymers and zinc oxide and their uses in sealant formulations possessing rapid deep-section cure.  This sealant consists of  a) silanol-terminated diorganopolysiloxane; b) crosslinker for the silanol-terminated diorganopolysiloxane(s); c) a catalyst for the crosslinking reaction; d) a rapid deep-section curing amount of zinc oxide.  The silicone sealant compositions of the present invention find application in insulating glass units as elements of windows, skylights, doors and related products. (RDC 7/27/2012)

1. 8,133,957 
Resin composition for encapsulating optical semiconductor element
 
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Hamamoto et al of Shin-Etsu Chemical, Japan, developed a material  for encapsulating an optical semiconductor consisting of  (A), (B) and (C) : (A) a branched silicone resin containing 2 to 6 epoxy groups, one or more (RSiO3/2) units, two or more (R2R3SiO)n structures and 3 or more (R 43-xR 5.xSiO1/2) units per molecule, in an amount of 100 parts by weight, wherein R1, R2, R3, R4 and R5 each represents a hydrogen atom, a hydroxyl group or a monovalent organic group of 1 to 20 carbon atoms which monovalent organic group may or may not contain an oxygen atom, provided that at least two of the R 5 groups within each molecule represent an epoxy group and/or an epoxy group-containing non-aromatic group, n represents an integer of 3 to 20, and x represents an integer of 1 to 3, (B) a curing agent, in such an amount that a content of epoxy reactive groups in the component (B) ranges from 0.4 to 1.5 moles per 1 mol of epoxy groups within component (A), and (C) a curing catalyst, in an amount within a range from 0.01 to 3 parts by weight per 100 parts by weight of a combination of component (A) and component (B). (RDC 5/4/2012)

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Roger D. Corneliussen
Editor
www.maropolymeronline.com

Maro Polymer Links
Tel: 610 363 9920
Fax: 610 363 9921
E-Mail: cornelrd@bee.net  

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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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** Date of latest addition; date of first entry is 5/4/2012.