Polymeric blends based on vinyl-aromatic polymers
AssigneeMontedison S.p.A.
InventorsGianfranco Biglione, Gian C. Fasulo
Life of this patent
Estimating the term…
Abstract
Polymeric blends containing 20-80% by weight of a modified vinyl-aromatic polymer containing from 5 to 15% by weight of a ethylenically unsaturated nitrile, and 80-20% by weight of at least one resin containing aromatic groups selected from aromatic polycarbonates and crystalline aromatic polyesters.
Claims6
A polymeric blend containing from 20 to 80% by weight, with respect to the blend, of a vinyl-aromatic polymer containing from 5 to less than 15% of an ethylenically unsaturated nitrile and from 80 to 20% by weight with respect to the blend of a crystalline aromatic polyester obtained by polymerization of a glycol of the formula:
- HO--(CH.sub.2).sub.n --OH
- in which n is an integer from 2 to 10, with a bicarboxylic acid of the formula:
- HOOC--R.sub.5 --B--R.sub.6 --COOH
- in which R.sub.5 and R.sub.6 represents --(CH.sub.2)m where m is zero or an integer from 1 to 4 and B is a bivalent aromatic radical represented by:
- ##STR6## in which D is:
- --(CH.sub.2)p--;
- --(CH.sub.2)p--CO--(CH.sub.2)p;
- --(CH.sub.2)p--O--(CH.sub.2)p;
- --O--(CH.sub.2)q--O--;
- ##STR7## where p is zero or an integer from 1 to 5 and q is an integer from 1 to 5, said vinyl-aromatic polymer containing about 8% by weight of polybutadiene rubber for rendering the polymer impact-resistant, said rubber having a glass transition temperature (Tg) lower than -20.degree. C.
Dependencies are inferred from the claim text.