Claims
- 1. A composition of matter comprising an ethylene/acrylic acid or ethylene/methacrylic acid interpolymer having incorporated therein a minor amount of at least one aromatic bis(organophosphorous) compound selected from those conforming to the formulae ##STR9## R' is an alkylene or alkylidene of C.sub.1 -C.sub.8, R is an alkylene or alkylidene of C.sub.1 -C.sub.8, including those having one or more ether or thioether groups in the molecule,
- Ar represents biphenylene or phenylene, whether substituted or not,
- Ar' represents, independently of each other, any of the Ar groups described above,
- R' represents alkyl groups of C.sub.1 -C.sub.8, including those represented by R and R' described above,
- and, in addition thereto, a minor amount of at least one hindered phenolic antioxidant and/or a minor amount of at least one dicarboxylic acid of the formula ##STR10## where R.sub.1 represents an aliphatic or aromatic grouping containing C.sub.1 to C.sub.24, R.sup.III and R.sup.IV each, independently, represent amino, mercapto, phosphate, carboxyl, or hydroxyl group or hydrogen.
- 2. The composition of claim 1 wherein the amount of the aromatic bis(organophosphorus) compound is in the range of about 0.01% to about 3% by weight of the interpolymer.
- 3. The composition of claim 1 wherein the aromatic bis(organophosphorus) compound is at least one of formula I.
- 4. The composition of claim 1 wherein the aromatic bis(organophosphorus) compound is at least one of formula II.
- 5. The composition of claim 1 wherein the interpolymer comprises ethylene interpolymerized with acrylic acid.
- 6. The composition of claim 1 wherein the said additional ingredient comprises a minor amount of at least one hindered phenolic antioxidant.
- 7. The composition of claim 1 wherein the said additional ingredient comprises about 0.01% to about 3% by weight of at least one hindered phenol compound conforming to the formula ##STR11## where X represents one or more alkyl groups.
- 8. The composition of claim 1 wherein the said additional ingredient comprises at comprises least one dicarboxylic acid of the empirical formula ##STR12## where R.sub.1 represents an aliphatic or aromatic grouping containing C.sub.1 to C.sub.24, R.sup.III and R.sup.IV each, independently represent amino, mercapto, phosphato, carboxyl, or hydroxyl group or hydrogen.
- 9. A method for improving the thermal stability of ethylene/acrylic acid or ethylene/methacrylic acid interpolymers, said method comprising
- incorporating into said interpolymers a minor amount of at least one aromatic bis(organophosphorous) compound selected from those conforming to the formulae ##STR13## R' is an alkylene or alkylidene of C.sub.1 -C.sub.8, R is an alkylene or alkylidene of C.sub.1 -C.sub.8, including those having one or more ether or thioether groups in the molecule,
- Ar represents biphenylene or phenylene, whether substituted or not,
- Ar' represents, independently of each other, any of the Ar groups described above,
- R" represents alkyl groups of C.sub.1-C.sub.8, including those represented by R and R' described above,
- and, in addition thereto, a minor amount of at least one hindered phenolic antioxidant and/or a minor amount of at least one dicarboxylic acid of the formula ##STR14## where R.sub.1 represents an aliphatic or aromatic grouping containing C.sub.1 to C.sub.24, R.sup.III and R.sup.IV each, independently, represent amino, mercapto, phosphate, carboxyl, or hydroxyl group or hydrogen.
- 10. The method of claim 9 wherein the amount of the aromatic bis(organophosphorus) compound is in the range of about 0.01% to about 3% by weight of the interpolymer.
- 11. The method of claim 9 wherein the aromatic bis(organophosphorus) compound is at least one of formula I.
- 12. The method of claim 9 wherein the aromatic bis(organophosphorus) compound is at least one of formula II.
- 13. The method of claim 9 wherein the interpolymer comprises ethylene interpolymerized with acrylic acid.
- 14. The method of claim 9 wherein the said additional ingredient comprises a minor amount of at least one hindered phenolic antioxidant.
- 15. The method of claim 9 wherein the said additional ingredient comprises about 0.01% to about 3% by weight of at least one hindered phenol compound conforming to the formula ##STR15## where X represents one or more alkyl groups.
- 16. The method of claim 1 wherein the said additional ingredient comprises at least one dicarboxylic acid of the empirical formula ##STR16## where R.sub.1 represents an aliphatic or aromatic grouping containing C.sub.1 to C.sub.24, R.sup.III and R.sup.IV each, independently, represent amino, mercapto, phosphato, carboxyl, or hydroxyl group or hydrogen.
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of Ser. No. 321,668 filed Nov. 16, 1981, now abandoned.
US Referenced Citations (9)
Continuation in Parts (1)
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Number |
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321668 |
Nov 1981 |
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