Abstract: This invention provides a primer composition comprising the following (A), (B), (C) and (D) components: (A) a saturated hydrocarbon polymer having at least one alkenyl group per molecule, (B) a silane coupling agent, (C) a polyvalent alkoxysilane and/or a condensation product thereof, and (D) an organoaluminum compound and/or an organotitanium compound.

Abstract: This invention provides a primer composition comprising the following (A), (B), (C) and (D) components:

Abstract: This invention provides a primer composition comprising the following (A), (B), (C) and (D) components: (A) a saturated hydrocarbon polymer having at least one alkenyl group per molecule, (B) a silane coupling agent, (C) a polyvalent alkoxysilane and/or a condensation product thereof, and (D) an organoaluminum compound and/or an organotitanium compound.

Abstract: This invention provides a primer composition comprising the following (A), (B), (C) and (D) components:

Abstract: By incorporating (A) a saturated hydrocarbon polymer having more than one alkenyl group capable of being hydrosilylated in each molecule and having a molecular weight of 2,000 to 50,000, (B) a component comprising a compound containing more than two silicon atom-bound hydrogen atoms, on average, in each molecule, (C) a compound having, within the molecule, one alkenyl group capable of being hydrosilylated, (D) a compound having, within the molecule, at least two alkenyl groups capable of being hydrosilylated and having a molecular weight less than 2,000, and (E) a hydrosilylation catalyst, a composition having good mechanical characteristics, a high gel fraction and a small heating loss can be obtained. As a result, the invention can provide a composition to secure the uniformity within a wide range of selection not depending on its viscosity, because it is markedly relaxed the restriction on SiH-containing compounds that are curing agents possibly becoming a cause of said insufficient curing.

Abstract: The present invention has its object to provide an effective method of accelerating a hydrosilylation reaction. This invention is related to a hydrosilylation reaction method which comprises carrying out the hydrosilylation reaction between a silicon compound (A) represented by the following general formula (1) and an alkenyl group-containing compound (B) in the presence of a Group VIII metal-containing catalyst (C) and a sulfur compound (D); RaXbHcSi  (1).

Abstract: A process for producing organic polymers having silicon containing groups in high yields comprises hydrosilylating a polymer having unsaturated groups with a hydrosilicon compound. This process includes keeping the polymer and a solvent in an inert gas environment and introducing oxygen into the reactor just before starting the hydrosilylation reaction.

Abstract: A curable composition comprising the components (A), (B), (C) and (D), viz.(A) an isobutylene polymer which contains in a molecule, at least one alkenyl group capable of hydrosilylation reaction;(B) a curing agent which contains at least two hydrosilyl groups in a molecule;(C) a hydrosilylation catalyst; and(D) an organic compound which contains in a molecule, at least one alkenyl or alkynyl group capable of hydrosilylation reaction.This composition is excellent in workability because of its low viscosity, and has such advantages that the cured product thereof has large strength and further that the weight loss by heating is small. Since a large amount of an inorganic filler can be blended with this composition, it is possible to obtain a composition having high thixotropy and little sagging.

Abstract: The present invention provides a novel halogen-free solvent system which can produce a good isobutylene polymer and can be easily reused. A novel process for the production of an isobutylene polymer is provided which comprises using a hydrocarbon solvent having a boiling point of not lower than 105.degree. C. and a melting point of not higher than -90.degree. C. Heretofore, a solvent system containing a halogenated hydrocarbon such as methylene chloride has been used for the production of an isobutylene polymer. However, such a solvent system has a great adverse effect on the environment. Therefore, a non-halogenated solvent is desirable. The present invention is characterized by the use of a hydrocarbon solvent as a reaction solvent. The resulting polymer has good properties. Further, compounds which are produced as by-products during the reaction can be easily removed, enabling the recycling of the solvent used. Thus, the production cost can be reduced.

Abstract: The present invention provides a novel solvent which is capable of providing an excellent isobutylene polymer, little affects the environment, has a lower solubility in water than those of halogenated hydrocarbons having 1 or 2 carbon atoms and can be decomposed relatively easily. Namely, the present invention relates to: a process for producing an isobutylene polymer, which comprises performing a cationic polymerization reaction in a solvent containing primary and/or secondary monohalogenated hydrocarbon(s) having 3 to 8 carbon atoms, and an isobutylene polymer thus obtained; and a process for producing an isobutylene polymer having a vinyl group introduced into the terminal thereof, which comprises reacting the isobutylene polymer produced above with 1,9-decadiene or allyltrimethylsilane, and an isobutylene polymer thus obtained.