Toray Silicone Company Limited

Dow Corning Corporation

Dow Corning Toray Silicone Company Limited

Katsuyoshi Nakasuji

Ryuzo Mikami

Mitsuo Hamada

Toshio Saruyama

Akito Nakamura

Takao Matsushita

Koji Shimizu

Yoshito Ushio

Mikami Ryuzo

Kazuo Hiria

A novel primer composition, which is especially adapted for promoting the adhesion of thermosetting rubbers to substrates having exceptionally inert surfaces, such a nickel, stainless steel and organic resins is disclosed. The composition comprises: (A) 100 parts, by weight, of an organosilicon compound selected from the group consisting of (1) alkenyltrialkoxysilane and (2) mild hydrolyzates of (1); (B) 0.01-200 parts, by weight, of a platinum compound; (C) 0.1-100 parts by weight of an organic titanic acid ester; and optionally (D) a solvent.

Primer composition and adhesion method

The finely divided cured silicone rubber particles of the present invention contain at least epoxide compound or a condensation product thereof. The epoxide compound or a condensation product thereof can be present in the free state or chemically bonded to the silicone rubber, and the particles have a particle diameter of 1 mm or less. The particles exhibit excellent compatibility with a variety of materials, including various organic resins and synthetic rubbers, and when added to or admixed with these materials enhance the physical properties of these materials and are durably bonded within matrices of these materials.

Finely divided silicone rubber additive material and method for

What is disclosed are novel compositions of matter which are useful as primers to bind room-temperature curable silicone, and silicone-modified rubbers, to various substrates. An example is the use of a mixture which is a reaction product of methyltrimethoxysilane and a bisphenol resin; an epoxyfunctional silane, and tetrabutyl titanate, to bond a room-temperature curable silicone rubber, which cures by a reaction which eliminates alcohol as a by-product, to an aluminum substrate.

Primer compositions

The silicone rubber adhesive of the present invention is composed of a particular organopolysiloxane, condensation reaction catalyst and organoperoxide in restricted blending ratios. As a result, a characteristic of the present invention is that various organic materials may be tightly and durably bonded to silicone rubbers by applying the adhesive of the present invention to the surface of a cured silicone rubber and laying on and then curing an organic material such as a synthetic rubber composition, for example, ethylene-propylene terpolymer rubber or chloroprene rubber, or a phenol resin, epoxy resin, etc. In addition, it is also a characteristic of the present invention that silicone rubber may be tightly bonded to various materials by applying the silicone rubber adhesive of the present invention to various organic materials as mentioned above, bringing a silicone rubber composition which contains a curing catalyst into contact and then curing.

Adhesive for silicone rubbers

What is disclosed is a new and novel primer composition comprising a silicone modified epoxy resin and an organotitanium acid ester. These compositions are useful for priming solid substrates to allow the adherence of room temperature cured silicone rubber to the substrate. The compositions are also useful as protective coatings.

Coating composition and primer

A composition curable at room temperature has resistance to soiling and maintains its adhesion to substrates when cured. The composition is the product obtained by mixing a polyorganosiloxane having at least two silicon-bonded hydroxyl radicals or two silicon-bonded hydrolyzable groups per molecule, a crosslinking organosilicon compound containing at least two silicon-bonded hydrolyzable groups, and an organosulfonate-containing silicon compound.

Room temperature-curable polyorganosiloxane compositions having

Silicone rubbers and silicone-modified organic rubbers are strongly adhered to various substrates using primer compositions comprising the combination of (1) a silicone-modified epoxy resin containing both epoxide and silicon-bonded alkoxy groups, and (2) an aminoalkylsilane.

A primer composition which has excellent durability when immersed in water is made from a silicone-modified epoxy resin, an aminoxy silicon compound, and an organotitanate. The primer composition is particularly useful for bonding room temperature vulcanizable silicone rubber or room temperature vulcanizable silicone-modified organic rubber to building substrate materials.

Growing community of inventors

Ichihara, Japan

Katsuyoshi Nakasuji