A method for preparing a cyanoalkyl-functional silane is disclosed. The method includes removing a cyanide impurity from an olefinic nitrile before hydrosilylation of the olefinic nitrile with a hydridosilane.

This organopolysiloxane composition, when cured at room temperature by moisture in the atmosphere, provides a silicone rubber cured product having good self-adhesiveness to a magnesium alloy. The organopolysiloxane composition contains (A) an organopolysiloxane having a hydroxy group and/or a hydrolysable silyl group at both ends of the molecular chain, (B) an organic silicon compound other than (A) and (C), having at least three hydrolysable groups bonded to a silicon atom per molecule, and/or a partial hydrolysis-condensation product thereof, and (C) a silane coupling agent having a specific molecular structure having a carboxylic acid silyl ester bond. Furthermore, a novel compound, having an alkoxysilyl group and a carboxylic acid silyl ester group per molecule, can have improved adhesiveness/bonding properties with respect to a base material due to the effect of carboxylic acid after hydrolysis thereof.

This organopolysiloxane composition, when cured at room temperature by moisture in the atmosphere, provides a silicone rubber cured product having good self-adhesiveness to a magnesium alloy. The organopolysiloxane composition contains (A) an organopolysiloxane having a hydroxy group and/or a hydrolysable silyl group at both ends of the molecular chain, (B) an organic silicon compound other than (A) and (C), having at least three hydrolysable groups bonded to a silicon atom per molecule, and/or a partial hydrolysis-condensation product thereof, and (C) a silane coupling agent having a specific molecular structure having a carboxylic acid silyl ester bond. Furthermore, a novel compound, having an alkoxysilyl group and a carboxylic acid silyl ester group per molecule, can have improved adhesiveness/bonding properties with respect to a base material due to the effect of carboxylic acid after hydrolysis thereof.

Silane compounds derived from medium-chain fatty acids are generally disclosed herein. Methods of using such compounds, for example, as compatibilizing agents, are also disclosed herein, as well as methods of making such compounds, for example, from medium-chain fatty acids derived from natural oils.

Functional, partially-fluorinated silane compound according to Formula (I): wherein: X is CH.sub.2=CH— or CHCH.sub.2—; R.sub.1 and R.sub.2 are linear or branched alkylenes having 1 to 4 carbon atoms; R.sub.f is a perfluoro(alkylene) group having 1 to 8 carbon atoms and, optionally, at least one catenary heteroatom selected from the group consisting of O and N; c is equal to the number of carbon atoms in X; and Y is —Cl or —OR, wherein R is a linear or branched alkyl having 1 to 4 carbon atoms. In some embodiments, Y is —O(CH.sub.2).sub.xCH.sub.3 wherein x is an integer from 0 to 3 are described. Methods of making and using such functional, partially-fluorinated silane compounds are also described

The present invention relates to a perfluoropolyether group-containing silane compound represented by formula (1): Rf—X.sup.1—X.sup.2—NQ.sub.kT.sub.2-k, (1), and a method for preparing the same. The present invention also relates to a perfluoropolyether group-containing silane compound represented by formula (2), ##STR00001##
and a method for preparing the same. The present invention also relates to a perfluoropolyether group-containing silane compound represented by formula (3), ##STR00002##
and a method for preparing the same. The perfluoropolyether group-containing silane compound of the present invention can be used for a surface treatment agent so that the substrates such as glass etc processed by the surface treatment agent are excellent in anti-fouling, anti-fingerprint, scrape resistant and abrasion resistant performances. Moreover, the preparation method of each of the compounds of the present invention is simple in process, easy to operate and implement.

A method for preparing a hydrocarbylhydrocarbyloxysilane of formula R.sub.aH.sub.pSi(OR).sub.(4-a-b), where each R is independently a hydrocarbyl group and subscript a is 1 to 4 and subscript b is 1 to 2 is disclosed. The method includes heating ingredients including a hydrocarbyl carbonate and a source of silicon and catalyst. The method can be used to make dimethyldimethoxysilane.

A method is useful for preparing alkylalkoxysilanes, such as alkylalkoxysilanes, particularly dimethyldimethoxysilane. The method includes heating at a temperature of 150° C. to 400° C., ingredients including an alkyl ether and carbon dioxide, and a source of silicon and catalyst. The carbon dioxide eliminates the need to add halogenated compounds during the method.

A polyether group-containing compound of the formula (I). In each of the compound of the formula (I), one or two R— are represented by (Rf—X.sup.f1-PE-X.sup.f2).sub.α—X.sup.1—, and one or two R— are represented by R.sup.Si—. The symbols are as defined in the description.

##STR00001##

Functional, partially-fluorinated silane compound according to Formula (I): wherein: X is CH.sub.2=CH— or CHCH.sub.2—; R.sub.1 and R.sub.2 are linear or branched alkylenes having 1 to 4 carbon atoms; R.sub.f is a perfluoro(alkylene) group having 1 to 8 carbon atoms and, optionally, at least one catenary heteroatom selected from the group consisting of O and N; c is equal to the number of carbon atoms in X; and Y is —Cl or —OR, wherein R is a linear or branched alkyl having 1 to 4 carbon atoms. In some embodiments, Y is —O(CH.sub.2).sub.xCH.sub.3 wherein x is an integer from 0 to 3 are described. Methods of making and using such functional, partially-fluorinated silane compounds are also described