Claims
- 1. A composition comprising a halogen-containing polymer, a metal mercaptide of a mercaptoester as the primary heat stabilizer and from about 0.01 to about 0.2 percent by weight of, based on the total weight of the composition, of an ammonium halide having the formula:
- R.sub.4 N.sup.+ X.sup.-
- wherein R is hydrogen, alkyl, aryl, alkaryl, aralkyl, or hydroxyalkyl; and X is a chloride or bromide ion.
- 2. The composition of claim 1 wherein the metal mercaptide is an organotin mercaptide of a mercaptoester.
- 3. The composition of claim 1 wherein the halide is a by-product of a double decomposition reaction whereby the mercaptide is made from the mercaptoester and a corresponding halide of the metal in the presence of a base which generates the R.sub.4 N.sup.+ ion.
- 4. The composition of claim 3 wherein the halide comprises a portion of a filter cake from a filtration of a reaction mixture generated by such a reaction.
- 5. The composition of claim 1 wherein the amount of ammonium halide is from about 0.01 to about 0.05 percent.
- 6. A method for stabilizing a halogen-containing polymer comprising adding a metal mercaptide of a mercaptoester as the primary heat stabilizer and from about 0.01 to about 0.2 by weight, based on the total weight of the stabilized polymer, of an ammonium halide having the formula:
- R.sub.4 N.sup.+ X.sup.-
- wherein R is hydrogen, alkyl, aryl, alkaryl, aralkyl, or hydroxyalkyl; and X is a chloride or bromide ion.
- 7. The method of claim 6 wherein the amount of ammonium halide is from about 0.01 to about 0.05 percent.
- 8. The method of claim 6 wherein the ammonium halide is added as an aqueous solution.
- 9. The method of claim 8 further characterized by drying the polymer.
Parent Case Info
This is a divisional of application Ser. No. 08/004,815 filed on Jan. 15, 1993 now abandoned.
US Referenced Citations (23)
Foreign Referenced Citations (4)
Number |
Date |
Country |
59-223732 |
Dec 1984 |
JPX |
1-90242 |
Apr 1989 |
JPX |
1068040 |
May 1967 |
GBX |
1349913 |
Sep 1971 |
GBX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
4815 |
Jan 1993 |
|