The invention relates to curable compositions based on polyorganosiloxanes with special silicon-containing terminal groups, a special capped adhesion promoter, and a curing catalyst. These compositions have improved adhesion properties and excellent storage stability. The invention furthermore relates to the use thereof.

The invention relates to curable compositions based on polyorganosiloxanes with special silicon-containing terminal groups, a special capped adhesion promoter, and a curing catalyst. These compositions have improved adhesion properties and excellent storage stability. The invention furthermore relates to the use thereof.

The present invention pertains to a room-temperature-curable organopolysiloxane composition containing (A) an organopolysiloxane having the hydrolyzable silyl-group-containing monovalent organic group represented by formula (1) ##STR00001## (R.sup.1 represents a substituted or unsubstituted C1-10 alkyl group or a substituted or unsubstituted C6-10 aryl group, R.sup.2 represents a substituted or unsubstituted C1-10 alkyl group or a substituted or unsubstituted C6-10 aryl group, and R.sup.3 represents a substituted or unsubstituted C1-20 alkyl group or a hydrogen atom; M is an integer from 1 to 3, and n is an integer of 2 or more; and the broken line represents atomic bonding), (B) a hydrolyzable organosilane compound and/or a partially hydrolyzed condensate thereof, (C) a curing catalyst, and (F) a bleed oil. According to this configuration, an organotin-compound-free and MEKO-free product is achieved, exceptional fast-curing properties are achieved, and a cured coating film has exceptional rubber strength and exceptional antifouling performance over a long period of time.

The present invention pertains to a room-temperature-curable organopolysiloxane composition containing (A) an organopolysiloxane having the hydrolyzable silyl-group-containing monovalent organic group represented by formula (1) ##STR00001## (R.sup.1 represents a substituted or unsubstituted C1-10 alkyl group or a substituted or unsubstituted C6-10 aryl group, R.sup.2 represents a substituted or unsubstituted C1-10 alkyl group or a substituted or unsubstituted C6-10 aryl group, and R.sup.3 represents a substituted or unsubstituted C1-20 alkyl group or a hydrogen atom; M is an integer from 1 to 3, and n is an integer of 2 or more; and the broken line represents atomic bonding), (B) a hydrolyzable organosilane compound and/or a partially hydrolyzed condensate thereof, (C) a curing catalyst, and (F) a bleed oil. According to this configuration, an organotin-compound-free and MEKO-free product is achieved, exceptional fast-curing properties are achieved, and a cured coating film has exceptional rubber strength and exceptional antifouling performance over a long period of time.

According to the present disclosure, there are provided a surface treatment agent having the advantage that the raw material components can be dissolved in a short time during preparation of the surface treatment agent and capable of exerting a good water repellency imparting effect, and a method of manufacturing a surface-treated body with the use of the surface treatment agent. The surface treatment agent according to the present disclosure includes the following components: (I) at least one kind selected from the group consisting of silicon compounds represented by the following general formulas [1], [2] and [3]; (II) at least one kind selected from the group consisting of a nitrogen-containing heterocyclic compound represented by the following general formula [4], a nitrogen-containing heterocyclic compound represented by the following general formula [5], and imidazole; and (III) an organic solvent.

##STR00001##

A tire tread comprises a rubber composition based on at least from 50 to 100 phr of a first diene elastomer, the first diene elastomer being a polybutadiene-based elastomer, modified with a functional group capable of interacting with silica as reinforcing filler; optionally from 0 to 50 phr of a second diene elastomer; at least 20 phr of carbon black; less than 40 phr of silica as reinforcing filler; a coupling agent; a plasticizing system comprising a plasticizing resin exhibiting a glass transition temperature of greater than 20 C.; and a crosslinking system based on organic peroxide; the total content of the first diene elastomer and of the second diene elastomer in the composition being within a range extending from 80 to 100 phr.

A tire tread comprises a rubber composition based on at least from 50 to 100 phr of a first diene elastomer, the first diene elastomer being a polybutadiene-based elastomer, modified with a functional group capable of interacting with silica as reinforcing filler; optionally from 0 to 50 phr of a second diene elastomer; at least 20 phr of carbon black; less than 40 phr of silica as reinforcing filler; a coupling agent; a plasticizing system comprising a plasticizing resin exhibiting a glass transition temperature of greater than 20 C.; and a crosslinking system based on organic peroxide; the total content of the first diene elastomer and of the second diene elastomer in the composition being within a range extending from 80 to 100 phr.

Waterproof urethane-based adhesive compositions are described herein. Silane is reacted with prepolymer urethane to at least partially end-cap the urethane. A reinforcing extender, a thixotropic agent, a magnetic agent, a first catalyst, and methylethylketoximino (MEKO) silane are also added to the composition to form the deactivated adhesive composition. Prior to coating a substrate with the adhesive, a second catalyst is added. The second catalyst speeds up the curing time and improves the shelf life of the moisture cure adhesive. The adhesive is cured to a final product that is waterproof, hydrolytically stable, and pH resistant.

Waterproof urethane-based adhesive compositions are described herein. Silane is reacted with prepolymer urethane to at least partially end-cap the urethane. A reinforcing extender, a thixotropic agent, a magnetic agent, a first catalyst, and methylethylketoximino (MEKO) silane are also added to the composition to form the deactivated adhesive composition. Prior to coating a substrate with the adhesive, a second catalyst is added. The second catalyst speeds up the curing time and improves the shelf life of the moisture cure adhesive. The adhesive is cured to a final product that is waterproof, hydrolytically stable, and pH resistant.

An autohesive polymer material that includes: at least one polymer having at least two terminal silyl groups of the Formula (1) given by:

Si(R.sup.1).sub.a(R.sup.2).sub.b(1).

Each of the radicals R.sup.1 comprises an alkyl, alkenyl or aryl group or a hydrogen atom. Each of the radicals R.sup.2 comprises a group that can be eliminated with water, b is 1, 2 or 3, and a is 3b. The polymer material further includes at least one condensation catalyst. Further, the polymer material is chemically precrosslinked and further crosslinkable with moisture. In addition, the polymer material is configured for use as a layer body that can be applied to a substrate. The polymer material of this kind can also be used for producing permanent bonds.