Back to results
US 5,292,809 AGranted
Blends of polycarbonate containing fluorinated-bisphenol A and polymethyl methacrylate
AssigneeEnichem S.p.A.
InventorMichael A. Drzewinski
Life of this patent
Estimating the term…
Abstract
Bisphenol A polycarbonate containing at least 15 mole % of fluorinated bisphenol monomer units such as 2,2-bis-(4-hydroxyphenyl) hexafluoropropane (6F-Bisphenol A) can be blended with polymethyl methacrylate (PMMA) to form thermodynamically miscible, transparent, single phase blends at all compositions.
Claims6
A composition comprising:
- a thermodynamically miscible blend of
- (I) 10 to 90 weight % of polymethyl methacrylate (PMMA) and
- (II) 90 to 10 weight % of an aromatic polycarbonate represented by the formula ##STR4## wherein Y is ##STR5## wherein R.sub.1 and R.sub.2 independently are fluorinated C.sub.1 -C.sub.6 alkyl or fluorinated C.sub.6 -C.sub.10 aryl group;
- R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are each independently hydrogen, C.sub.1 -C.sub.3 alkyl, chlorine and bromine;
- Z is a radical of the formula ##STR6## wherein X is C.sub.1 -C.sub.6 straight or branched alkyl, carbonyl, sulfonyl, oxygen, sulfur or a single bond, n is an integer between 5 and 10,000 m is an integer of 0-10,000, provided n .gtoreq. 0.15 (m+n), wherein said composition has been melt blended and said blend of components (I) and (II) has one Tg.
2 more elements
Dependencies are inferred from the claim text.