Claims
- 1. 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.
- 2. A polymeric blend according to claim 1, wherein the crystalline aromatic polyester is polybutyleneterephthalate.
- 3. A polymeric blend according to claim 1, in which the vinyl-aromatic polymer contains at least 50% by weight of one or more vinyl-aromatic compounds of the formula ##STR8## in which X is hydrogen or C.sub.1 -C.sub.4 alkyl; Y is a halogen or C.sub.1-4 alkyl; and n is zero or an integer from 1 to 5.
- 4. A polymeric blend according to claim 1, in which the ethylenically unsaturated nitrile is acrylonitrile.
- 5. A polymeric blend according to claim 4, in which the content of acrylonitrile is less than 10% by weight.
- 6. A polymeric blend according to claim 1, in which the content of ethylenically unsaturated nitrile in the vinyl-aromatic polymer is less than 10% by weight.
Parent Case Info
This is a division of application Ser. No. 837,196 filed Mar. 10, 1986, now U.S. Pat. No. 4,749,745 which in turn is a continuation of Ser. No. 583,399 filed Feb. 24, 1984, now abandoned.
US Referenced Citations (12)
Divisions (1)
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837196 |
Mar 1986 |
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Continuations (1)
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583399 |
Feb 1984 |
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