Abstract:
There is described a release composition including a polyorganosiloxane polymer and a release modifier. The release modifier includes comprising an alkenyl silsesquioxane an organo functional siloxane of the formula MDxM, wherein M represents R 3 S1O 1/2 , D represents R 2 S1O 2/2 , wherein R is alkyl or alkenyl of 1 to 40 carbon atoms, or hydrogen wherein the organo functional siloxane has a viscosity of from about 5 centipoises to about 80 centipoises and x is from about 5 to about 80, and an optionally a reactive diluent. The release composition includes at least one siloxane cross-linking agent, an inhibitor; and a hydrosilation catalyst.
Abstract:
Provided is a curable composition comprising specific silicon-containing polymers,at least one vinyl carbosiloxane polymer, and at least a catalyst, cured products obtainable by heating such composition, and the use of said composition as semiconductor encapsulating material and/or electronic elements packaging material. More particularly, the hydrosilylation-curable composition that cures to form polycarbosiloxane products having optical clarity, resistance to high temperature, and very good moisture and gas barrier properties. And disclosed are reliable light emitting devices encapsulated with these polycarbosiloxane compositions.
Abstract:
Methods for reducing aluminosilicate containing scale in a Bayer process involving treating a Bayer process equipment surface with a scale inhibiting composition having high ionic strength prior to exposure to a Bayer process stream.
Abstract:
A compound is provided, having the formula (I), wherein Rs is a soft block polymer; wherein each T is independently a urethane or urea linkage; see formulae (A) and (B); wherein each RD is independently -CH3, -CH2CH3, -CH2CH2CH3, or - CH2CH2CH2CH3; wherein each R'D is independently -CH3, -CH2CH3, -CH2CH2CH3, -CH2CH2CH2CH3, or -ORD; and wherein each p is independently 1, 2, or 3. Compositions containing the compound, and methods of making and using the compound are provided.
Abstract:
This invention provided an aqueous coating composition for metal surface pre-treatment comprising: (i) at least one organosilane with at least one hydrolyzable substituent; (ii) at least one water soluble and/or water dispersible silane-functional oligomer; (iii) at least one water-soluble compound of the elements Zr and/or Ti; The resultant sol-gel coating composition reveals an extended shelf life and after surface pre-treatment using the invented coating compositions the metal substrates have higher resistance to corrosion, humidity and solvent and at the same time have better surface conductivity and paintability.
Abstract:
The present invention is directed to a process for the manufacture of a multilayer silicone structure of cured silicone elastomer layers wherein the compositions of each of the curable silicone elastomers are chosen such as to provide excellent layer-to-layer adhesion of the said cured silicone elastomer layers, that is, the layers do not suffer form cohesive failure. The multilayer silicone structures may be used for example for the manufacture of electronic devices, coatings, shaped molded articles, laminates etc.