Claims
- 1. A process for recovering and reusing scrap material of polyethylene terephthalate coated with a chlorine-containing polymer selected from the group consisting of polymers of vinylidene chloride and of vinyl chloride, said process comprising combining said scrap material with about 5-25% based on the weight of said scrap material of an ethylene copolymer E/X/Y, where
- E is the radical formed from ethylene and comprises about 40-99.5 weight percent of the ethylene copolymer;
- X is the radical formed from ##STR2## where: R.sub.1 is an alkyl group with 1-8 carbon atoms;
- R.sub.2 is hydrogen, methyl, or ethyl; and
- X comprises about 0-40 weight percent of the ethylene copolymer; and
- Y is an epoxy group-containing copolymerizable monomer selected from the class consisting of epoxy esters of copolymerizable unsaturated organic acids, epoxy ethers having a copolymerizable vinyl or allyl group, and monoepoxy-substituted diolefins of 4 to 12 carbon atoms, and comprises about 0.5-20 weight percent of the ethylene copolymer,
- and melt-blending the combined polymer materials at a melt temperature of about 260.degree.-310.degree. C.
- 2. The process of claim 1 where R.sub.1 contains 4-6 carbon atoms.
- 3. The process of claim 2, where R.sub.1 contains 4 carbon atoms.
- 4. The process of claim 1 wherein Y is selected from the class consisting of glycidyl acrylate and glycidyl methacrylate.
- 5. The process of claim 4 where the ethylene copolymer is a copolymer of ethylene, n-butyl acrylate, and glycidyl methacrylate.
- 6. The process of claim 1 where R.sub.2 is hydrogen or methyl.
- 7. The process of claim 6 where R.sub.2 is hydrogen.
- 8. The process of claim 1 where X comprises 15-35 weight percent of the ethylene copolymer.
- 9. The process of claim 8 where X comprises 20-35 weight percent of the ethylene copolymer.
- 10. The process of claim 1 where X is absent.
- 11. The process of claim 1 where Y comprises 2-10 weight percent of the ethylene copolymer.
- 12. The process of claim 11 where Y comprises 3-8 weight percent of the ethylene copolymer.
- 13. A process of claim 1 where there also is initially present in the blend about 0.05-1.0%, based on the weight of the scrap material, of an additive selected from the group consisting of calcium carbonate, calcium stearate, other metal stearates, and natural and synthetic hydrotalcite.
- 14. A process of claim 1 where there also is initially present in the blend about 5-25%, based on the total polymer weight, of a low modulus toughening polymer.
- 15. A paint can melt-fabricated from a polymer blend composition consisting essentially of scrap material of polyethylene terephthalate coated with a chlorine-containing polymer selected from the group consisting of polymers of vinylidene chloride and of vinyl chloride, said scrap material being melt-blended with about 5-25% based on the weight of said scrap material of an ethylene copolymer E/X/Y, where
- E is the radical formed from ethylene and comprises about 40-99.5 weight percent of the ethylene copolymer,
- X is the radical formed from ##STR3## where: R.sub.1 is an alkyl group with 1-8 carbon atoms;
- R.sub.2 is hydrogen, methyl, or ethyl; and
- X comprises about 0-40 weight percent of the ethylene copolymer; and
- Y is an epoxy group-containing copolymerizable monomer selected from the class consisting of epoxy esters of copolymerizable unsaturated organic acids, epoxy ethers having a copolymerizable vinyl or allyl group, and monoepoxy-substituted diolefins of 4 to 12 carbon atoms, and comprises about 0.5-20 weight percent of the ethylene copolymer.
Parent Case Info
This is a division of application Ser. No. 06,947,835, filed Dec. 30, 1986, now U.S. Pat. No. 4,826,897.
US Referenced Citations (4)
Foreign Referenced Citations (4)
Number |
Date |
Country |
2307846 |
Nov 1976 |
FRX |
54-144453 |
Nov 1979 |
JPX |
912739 |
Mar 1982 |
SUX |
1352088 |
May 1974 |
GBX |
Non-Patent Literature Citations (2)
Entry |
Technical Bulletin, Kyowa Chemical Industry Co. on DMT-4A (Hydrotalcite-Like Compound). |
Chevassus et al., "The Stabilization of Polyvinyl Chloride", Edward Arnold LTD, London, 1961, pp. 281, 351, 359. |
Divisions (1)
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Number |
Date |
Country |
Parent |
947835 |
Dec 1986 |
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