Claims
- 1. A graft polymer comprising:
- a) from 10 to 90% by weight of a crosslinked or partially cross-linked copolymer of from 10 to 60% by weight of a compound corresponding to formula (I) or (II) ##STR4## wherein R represents --H, --CH.sub.3, or --C.sub.2 H.sub.5 ; ##STR5## wherein R represents --H, --CH.sub.3, or --C.sub.2 H.sub.5 ; and from 90 to 40% by weight of styrene, .alpha.-methyl styrene, acrylonitrile, C.sub.1 -C.sub.8 alkyl acrylate, C.sub.1 -C.sub.8 -alkyl methacrylate, vinyl acetate, or mixtures thereof, as graft basis; and
- b) from 90 to 10% by weight of a polymer comprising phosphonic acid derivatives corresponding to formula (III) ##STR6## wherein Y represents --H or --CH.sub.3 ;
- X represents a single bond or --CH.sub.2 ; and
- R' represents aryl or alkyl;
- as graft superstrate.
- 2. Graft polymers according to claim 1 in which the graft superstrate is a copolymer of monomers corresponding to formula (III) of claim 1 and maleic acid anhydride, maleic acid imide or maleic acid esters.
- 3. The graft polymer of claim 2, wherein the graft b) additionally comprises up to 20% by weight, based on weight of graft, of other vinyl monomers selected from the group consisting of styrene, .alpha.-methyl stryrene, acrylonitrile, methacrylonitrile, vinyl acetate, vinyl propionate, vinyl ethers, C.sub.1-8 alkylacrylates, C.sub.1-8 alkylmethacrylates, and dienes.
- 4. The graft polymer of claim 1 comprising 30 to 80% by weight of a) and 70 to 20% by weight of b).
- 5. The graft polymer of claim 1 wherein the compounds corresponding to formula (I) or (II) consist of triallyl cyanurate or triallylisocyanurate.
- 6. The graft polymer of claim 1 wherein, in the derivatives corresponding to formula (III), X represents --CH.sub.2 -- and R' represents C.sub.1-8 alkyl or C.sub.6-12 aryl.
- 7. The graft polymer of claim 1 which is halogen free.
- 8. The graft polymer of claim 1, wherein R' is C1-8 alkyl or C6-12 aryl, optionally substituted with O- or N- groups.
- 9. The graft polymer of claim 1, wherein R' is phenyl, naphthyl, methoxyphenyl, ethoxyphenyl, acetamidophenyl, or methyl-, ethyl-, propyl-, butyl- or hexyl-phenyl.
- 10. A flame retardant mixture of a thermoplast and 1 to 20% by weight of the graft copolymer of claim 1.
- 11. The flame retardant mixture of claim 10 wherein the thermoplast is selected from ABS, polymethyl methacrylate, polystyrene, polyvinylchloride, polypropylene, polyethylene, aromatic polycarbonate, polyester, polyamide, or mixtures thereof.
- 12. The flame retardant mixture of claim 11 wherein the thermoplast is polycarbonate.
- 13. The flame retardant mixture of claim 10 wherein the polycarbonate is based on bisphenol A.
- 14. The flame retardant mixture of claim 9 wherein the thermoplast is a mixture of ABS and polycarbonate.
Priority Claims (1)
Number |
Date |
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Kind |
4111391 |
Apr 1991 |
DEX |
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Parent Case Info
This application is a continuation of application Ser. No. 07/859,055 filed on Mar. 27, 1992 now abandoned.
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4088710 |
Spak et al. |
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4959418 |
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5147955 |
Lindner et al. |
Sep 1992 |
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Number |
Date |
Country |
0305816 |
Mar 1989 |
EPX |
0436914 |
Jul 1991 |
EPX |
2244523 |
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DEX |
61-53314 |
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JPX |
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Entry |
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Continuations (1)
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Number |
Date |
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Parent |
859055 |
Mar 1992 |
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