Method for the manufacture of alkoxysilyl-containing thiocarboxylic acid esters

An alkoxysilyl-containing thiocarboxylic acid ester composition comprising:

• (i) an alkoxysilyl-containing thiocarboxylic acid ester of the general formula (I):
• R1—[C(═O)—S—R2—SiR3a(OR4)3-a]z (I)
• where R1 is a monovalent group selected from straight chain alkyl group containing from 1 to 18 carbon atoms, a branched chain alkyl group containing from 3 to 18 carbon atoms, a cycloalkyl containing from 5 to 18 carbon atoms, an alkenyl containing from 2 to 18 carbon atoms, an aryl containing from 6 to 18 carbon atoms, aralkyl containing from 7 to 18 carbon atoms or hydrogen, or is a divalent group selected from an alkyl containing from 1 to 10 carbon atoms, a cycloalkyl containing from 5 to 10 carbon atoms or phenyl;
• each R2 is independently a divalent group selected from straight chain alkyl group containing from 1 to 10 carbon atoms, a branched chain alkyl group containing from 3 to 10 carbon atoms, a cycloalkyl group containing from 5 to 10 carbon atoms, an alkenyl group containing from 2 to 10 carbon atoms, an aryl group containing from 6 to 10 carbon atoms or aralkyl group containing from 7 to 10 carbon atoms;
• each R3 is independently a monovalent group selected from straight chain alkyl group containing from 1 to 6 carbon atoms, a branched chain alkyl group containing from 3 to 6 carbon atoms, a cycloalkyl group containing from 5 or 6 carbon atoms, an alkenyl group containing from 2 to 6 carbon atoms, an aryl group containing 6 carbon atoms or an aralkyl group containing from 7 to 10 carbon atoms;
• R4 is independently a monovalent group selected from straight chain alkyl group containing from 1 to 6 carbon atoms, a branched chain alkyl group containing from 3 to 6 carbon atoms, a cycloalkyl group containing from 5 or 6 carbon atoms, an alkenyl group containing from 2 to 6 carbon atoms, an aryl group containing 6 carbon atoms, aralkyl group containing from 7 to 10 carbon atoms, a straight chain alkyl group containing 2 to 6 carbon atoms and a hydroxyl group, an alkyl group containing at least one oxygen atom having the structure
• R2—(OCH2CH2)m(OCH2CH(CH3))nOR1 or a divalent group formed from two R4 groups being bonded together through a covalent bond, with the provision that (i) if two R4 groups are bonded together, then a is 0 or 1 and (ii) the sum of m+n is from 1 to 20;
• a, m, n and z are integers wherein a is 0, 1 or 2, m is from 0 to 10, n is from 0 to 10 and z is 1 or 2, and a thioester of the general formula (II):
• R1[C(═O)SR5]z (II)
• wherein
• R1 is a monovalent group selected from straight chain alkyl group containing from 1 to 18 carbon atoms, a branched chain alkyl group containing from 3 to 18 carbon atoms, a cycloalkyl containing from 5 to 18 carbon atoms, an alkenyl containing from 2 to 18 carbon atoms, an aryl containing from 6 to 18 carbon atoms, aralkyl containing from 7 to 18 carbon atoms or hydrogen, or is a divalent group selected from an alkyl containing from 1 to 10 carbon atoms, a cycloalkyl containing from 5 to 10 carbon atoms or phenyl;
• each R5 is independently a monovalent group selected from straight chain alkyl group containing from 1 to 18 carbon atoms, a branched chain alkyl group containing from 3 to 18 carbon atoms, a cycloalkyl group containing from 5 to 18 carbon atoms, an alkenyl groi[containing from 2 to 18 carbon atoms, an aryl group containing from 6 to 18 carbon atoms, aralkyl group containing from 7 to 18 carbon atoms, and wherein R1 and z is an integer wherein z is 1 or 2.