Functionalization of polyphenylene ether with graftable orthoester
AssigneeGeneral Electric Company
InventorsFarid F. Khouri, Robert J. Halley, John B. Yates, III
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Abstract
Functionalized polyphenylene ethers made with graftable orthoester moieties, preferably the orthoester is 4-acryloyloxymethyl-2-methoxy-2-methyl-1,3-dioxolane monomer. The preferred method for grafting orthoester functionality onto polyphenylene ethers is by melt grafting. Once formed, these Polyphenylene ether graft orthoesters (PPE-g-OE) are useful as compatibilizers in blends of PPE with polyesters.
Claims11
A functionalized polyphenylene ether prepared by the reaction of a polyphenylene ether with an ethylenically unsaturated orthoester having the formula ##STR14## wherein:
- R.sup.1 is a C.sub.1-6 alkylene radical;
- R.sup.2 is a C.sub.1-4 primary or secondary alkyl radical and R.sup.3 is a C.sub.1-4 primary or secondary alkyl or C.sub.6-10 aromatic radical, or R.sup.2 and R.sup.3 together with the atoms connecting them form a 5-, 6- or 7-membered ring;
- each of R.sup.4, R.sup.5 and R.sup.6 is independently hydrogen, an unsubstituted or substituted C.sub.1-8 alkyl radical or an unsubstituted or substituted aryl radical;
- R.sup.7 is hydrogen or C.sub.1-4 primary or secondary alkyl;
- X is ##STR15## x is 0 when R.sup.2 and C* form a ring and is otherwise 1;
- m is 0 or 1;
- n is 1 or 2;
- and
- y is at least 1.
A method for preparing a functionalized polyphenylene ether which comprises blending, at a temperature in the range of 250.degree.-350.degree. C., a polyphenylene ether and at least one ethylenically unsaturated orthoester having the formula ##STR17## wherein:
- R.sup.1 is a C.sub.1-6 alkylene radical;
- R.sup.2 is a C.sub.1-4 primary or secondary alkyl radical and R.sup.3 is a C.sub.1-4 primary or secondary alkyl or C.sub.6-10 aromatic radical, or R.sup.2 and R.sup.3 together with the atoms connecting them form a 5-, 6- or 7-membered ring;
- each of R.sup.4, R.sup.5 and R.sup.6 is independently hydrogen, an unsubstituted or substituted C.sub.1-8 alkyl radical or an unsubstituted or substituted aryl radical;
- R.sup.7 is hydrogen or C.sub.1-4 primary or secondary alkyl;
- X is ##STR18## x is 0 when R.sup.2 and C* form a ring and is otherwise 1;
- m is 0 or 1;
- n is 1 or 2;
- and
- y is at least 1.
Dependencies are inferred from the claim text.