Novel organo-tin compounds

Claim 1

A process for producing an organo-tin compound which comprises reacting at least one of the compounds having the following formula: wherein R is an alkyl, alkenyl or aralkyl of one to 18 carbon atoms, these groups being able to contain substituent groups, and l represents a mean degree of polymerization of at least 2, with at least one compound selected from the group consisting of mono-organo-tin compounds having the formula wherein R has the same meaning as defined above, SX is a merapto residue or a group of the formula -SR'' COOR'''' (IV) wherein R'' is alkylene, cycloalkylene, alkenylene or phenylene of one to 8 carbon atoms, these groups being able to contain chlorine or a C1 - C9 alkyl group, and R'''' is hydrogen, alkyl, cycloalkyl, alkenyl or aralkyl, these groups being able to contain chlorine or a C1 - C9 alkyl group, SY is a group of SX or a group of the formula: ((G)x-(R'')w OOCR''S )Z where R'' has the same meaning as defined above; G is oxygen, sulfur, carbon or methylidyne; w is an integer of 1 - 4; x is an integer of 0 or 1; y is an integer of 1 - 8; and z is an integer of 2 - 4, or a group of the formula wherein R and R'' have the same meanings as defined above, E is a group of said SX or a group of the formula (V), q is an integer of 1 - 3 and r is an integer of 1 - 2, m and n are integers such that m + n 3, and p represents a mean degree of polymerization of at least 1.