Dow Corning Corporation

Other

Dow Corning Toray Company, Ltd.

Dimitris Elias Katsoulis

Bizhong Zhu

Frederick J McGarry

John Robert Keryk

Zhongtao Li

Nobuo Kushibiki

Michitaka Suto

Kermit S Kwan

Debora F Bergstrom

Katsuya Eguchi

Bihn Thanh Nguyen

The present invention relates to a film made from a cross-linked polysiloxane obtained by subjecting a polysiloxane that has a specific chemical structure and contains at least two unsaturated aliphatic hydrocarbon groups in one molecule and an organosilicon compound with at least two hydrogen atoms directly bonded to silicon atoms in one molecule to cross-linking reaction in the presence of a platinum-type catalyst. The film provided by the invention possesses superior heat-resistant properties, has excellent permeability for light in the visible wavelength range, is characterized by low birefringence, and demonstrates physical properties suitable for practical application. By forming an inorganic substance layer on the aforementioned polysiloxane, it is possible to use the laminated film of the invention, e.g., as a transparent electrode film.

Polysiloxane film and process for producing the same

An organopolysiloxane copolymer, comprising (i) R SiO units, (ii) random R SiO units, and (iii) linear (R SiO) units, wherein R is independently hydrocarbyl or halogen-substituted hydrocarbyl, R and R are independently R or H, n has an average value of from 5 to 500, the mole ratio of R SiO units to R SiO units is from 1 to 30, and the mole ratio of R SiO units and R SiO units combined to (R SiO) units is from 3 to 600 when the copolymer contains aliphatic unsaturation or from 1 to 600 when the copolymer is free of aliphatic unsaturation; and a method of preparing the organopolysiloxane copolymer.

Organopolysiloxane copolymer and method of preparing

A hydrosilylation reaction curable composition that includes a silsesquioxane polymer, a mixture of silanes or siloxanes as a cross-linking compound and a hydrosilylation reaction catalyst. The curable composition is cured to form a cured resin having high fracture toughness and strength without the loss of elastic modulus.

High fracture toughness hydrosilyation cured silicone resin

Fiber reinforced silicone matrix resin based composites are made more resistant to delamination by incorporating a suitably tough, lower modulus silicone resin, different from said matrix resin, between each fiber layer of the composite. Preferably, woven mats of glass or carbon fibers impregnated with a desired silicone matrix resin are coated with a precursor of the tougher interleaf silicone resin. The resulting laminate of alternating matrix resin-fiber layers and interleaved layers of the tougher silicone resin provides a tougher silicone based composite.

Silicone resin based composites interleaved for improved toughness

A hydrosilylation reaction curable composition including a silsesquioxane polymer, a cross-linking compound, a hydrosilylation reaction catalyst and colloidal silica having a surface coating formed thereon. The curable composition is cured to form a cured resin having high fracture toughness and strength without the loss of elastic modulus and glass transition temperature.

Hydrosilyation cured silicone resin containing colloidal silica and a process for producing the same

A process for producing a cured silsesquioxane resin. The process includes fractionating the silsesquioxane resin a plurality of times utilizing an organic solvent in combination with an organic non-solvent. The fractionated resin is then stripped of excess solvent. The stripped resin is then mixed with a cross-linking compound to form a curable composition. The curable composition is cured to form a cured resin having high fracture toughness and strength without the loss of elastic modulus.

Hydrosilyation cured silicone resins obtained by fractionation

A cured silsesquioxane resin and method for its preparation are disclosed. By using a silyl-terminated hydrocarbon in the hydrosilylation reaction curable composition used to prepare the cured silsesquioxane resin, the cured silsesquioxane resin has improved strength and toughness without significant loss of modulus. A typical silyl-terminated hydrocarbon useful in this invention is silphenylene.

Growing community of inventors

Tokyo, Japan

Dimitris Elias Katsoulis