Block copolymers containing polyaromatic(alkyl)methacrylates and their blends with polycarbonates
AssigneesIstituto Guido Donegani S.p.A., Enichem S.p.A.
InventorMichael A. Drzewinski
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Abstract
Polycarbonates (PC) can be blended over all compositions with block copolymers containing polyaromatic(alkyl)methacrylates (PAAM) to form modified but transparent polycarbonates for a number of applications. Furthermore, additional homopolymers corresponding to those in the block copolymer may also be added to further modify the properties of the polycarbonate while still retaining transparency. Polycarbonate plus PAAM block copolymers containing from 1 to 99% by weight PC behave as transparent materials with the PC and the PAAM block forming a continuous, single phase material.
Claims18
A resin composition comprising a blend of:
- (I) 99 to 1 wt % of a polycarbonate of formula ##STR4## wherein Y is a divalent aromatic radical of formula ##STR5## wherein W is C.sub.1 -C.sub.6 straight or branched alkyl, carbonyl, sulfonyl, oxygen, sulfur or a single bond and m is a whole number between 10 and 30,000;
- (II) 1 to 99 wt % of a block copolymer containing a block of polyaromatic(alkyl)methacrylate of formula ##STR6## where n is an integer from 10 to 5,000;
- x is an integer from 0 to 4 and R is phenyl, naphthyl or phenyl substituted by C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, hydroxy, amino, carbonyl or C.sub.1 -C.sub.6 -alkoxycarbonyl and a block of rubbery polymer selected from the group consisting of poly-C.sub.4 -C.sub.10 -alkylacrylate, dienic rubber, siloxane elastomer polyburyl methacrylate and saturated hydrocarbon.
A block copolymer represented by the formula A-b-B, A-b-B-b-A, B-b-A-b-B or (A-B).sub.n ;
- where A is a block of the formula ##STR7## where n is an integer from 10 to 5,000;
- x is an integer from 0 to 4 and R is phenyl, naphthyl or phenyl substituted by halogen, phenyl, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, hydroxy, amino, carbonyl, or C.sub.1 -C.sub.6 alkoxy carbonyl;
- B is a rubbery polymer selected from the group consisting of poly-C.sub.4 -C.sub.10 -alkylacrylate, dienic rubber, siloxane elastomer polylauryl methacrylate and saturated hydrocarbon;
- and "b" indicates a block structure.
Dependencies are inferred from the claim text.