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Organotin compounds
| Details |
Inventors: Collins, John Desmond; Coates, Harold; Siddiqui, Iftikhar Hussain;
Assignee: Albright & Wilson Limited (Oldbury, EN)
Primary Examiner: Sneed; Helen M. S.
Assistant Examiner:
Attorney, Agent or Firm:
Organotin compounds of formula ##EQU1## where a is 0 or 1, x, x', y and y' are 1-6, R.sub.1, R.sub.2 R.sub.6 and R.sub.7 are C.sub.1-12 alkyl, cycloalkyl, aromatic or aralkyl hydrocarbyl, R.sub.4 and R.sub.9 are as defined for R.sub.1 or are C.sub.13-21 alkyl, C.sub.2-21 alkenyl or substituted aromatic hydrocarbyl, R.sub.3, R.sub.5, R.sub.8 and R.sub.10 are as defined for R.sub.4 or are hydrogen or a pair of R.sub.3 and R.sub.5 or R.sub.8 together with the carbon atom to which they are joined forms a cycloalkyl ring and X is O or S, are stabilizers for halogen containing resins, especially PVC. |
|
DETAILED DESCRIPTION We claim: 1.
An organotin compound of the generic formula ##EQU17## wherein a is 0 or 1, each of x, x', y and y', which are the same or different, is an integer of 1-6, each of R.
sub.
1, R.
sub.
2, R.
sub.
6 and R.
sub.
7, which are the same or different is an alkyl group of 1 to 12 carbon atoms, a cycloalkyl group, an aromatic hydrocarbyl group or an aralkyl hydrocarbyl group, each of R.
sub.
4 and R.
sub.
9, which are the same or different, is as defined above for R.
sub.
1, R.
sub.
2, R.
sub.
6 and R.
sub.
7 or is an alkyl group of 13-21 carbon atoms, an alkenyl group of 2 to 21 carbon atoms, each of R.
sub.
5 and R.
sub.
10, which are the same or different, is as defined above for R.
sub.
4 and R.
sub.
9 or is hydrogen, each of R.
sub.
3 and R.
sub.
8 is as defined for R.
sub.
4 and R.
sub.
9 or is a substituted phenyl group with at least one substituent which is an alkyl group of 1 to 6 carbon atoms, an alkoxy group of 1 to 6 carbon atoms or a hydroxy group, or at least one of the pairs R.
sub.
3 and R.
sub.
5 and R.
sub.
8 and R.
sub.
10, together with the carbon atom to which they are attached, forms a cycloalkyl ring and X is oxygen or sulfur.
2.
A compound according to claim 1 of the general formula ##EQU18## 3.
A compound according to claim 1 of the general formula 4.
A compound according to claim 1 wherein each of x, x', y and y' is 1 or 2.
5.
A compound according to claim 1 wherein R.
sub.
1, R.
sub.
2, R.
sub.
3, R.
sub.
4, R.
sub.
5, x and y are the same respectively as R.
sub.
6, R.
sub.
7, R.
sub.
8, R.
sub.
9, R.
sub.
10, x' and y'.
6.
A compound according to claim 1 wherein each of R.
sub.
1, R.
sub.
2, R.
sub.
6 and R.
sub.
7 is an alkyl group of 4-8 carbon atoms or a cycloalkyl group of 5-7 carbon atoms.
7.
A compound according to claim 1 wherein each of R.
sub.
5 and R.
sub.
10 is hydrogen or an alkyl group of 1-6 carbon atoms.
8.
A compound according to claim 1 wherein each of R.
sub.
4 and R.
sub.
9 is an alkyl group of 10-19 carbon atoms or an alkenyl group of 10-19 carbon atoms.
9.
A compound according to claim 1 wherein each of R
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Molecular Biology 
