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1. WO1990005167 - COMPOSITION DE MOULAGE THERMOPLASTIQUE ET SON PROCEDE DE PREPARATION

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

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1 . A thermoplastic molding composition , comprising :

A) an aromatic polycarbonate ;

B ) a polyamide ;

C) a compatibilizing amount of a
polyalkyloxazoline characterized by
repeated units corresponding to the general formula:
R
c !=o
-N-CH2-CH2- whereih R is a monovalent C-*-C]| alkyl
radical.

2. A thermoplastic molding composition as claimed in Claim 1 which further comprises

D) an impact modifying rubber.

3. A thermoplastic molding composition as claimed in Claim 1 or Claim 2, wherein the aromatic polycarbonate is characterized by repeated units corresponding to the general formula: -21-


wherein X is a divalent C-*-C-*c*- hydrocarbon radical, a single bond, -0-, -S-, -S2-, -SO-, -S02-, or -C0-, and each Z is independently hydrogen, a halo radical, or a C-]-Ci( alkyl radical.

4. A thermoplastic molding composition as claimed in Claim 3, wherein the aromatic polycarbonate is Bisphenol A polycarbonate.

5. A thermoplastic molding composition as claimed in Claim 1 or Claim 2, wherein the polyamide is polycaprolactam or polyhexamethylene adipamide.

6. A thermoplastic molding composition as claimed in Claim 1 or Claim 2, wherein the polyalkyloxazoline molecules are from 100 to 100,000 units in length or from 1,000 to 10,000 units in length.

7. A thermoplastic molding composition as claimed in Claim 1 or Claim 2, wherein the polyalkyloxazoline is polyethyloxazoline and the impact modifying rubber is a styrene-butadiene block copolymer, a hydrogenated styrene-butadiene block copolymer, polybuta-diene, polyisoprene or polybutene.

8. A thermoplastic molding composition as claimed in Claim 1 or Claim 2, wherein the impact modifying rubber is a grafted copolymer, comprising:

A) from 25 percent to 95 percent by weight of
an elastomeric rubber core; and

B) from 5 percent to 75 percent by weight of:

i) a rigid grafted-on thermoplastic shell; or

0 ii) a grafted-on thermoplastic polymer matrix.

9. A thermoplastic molding composition as
claimed in Claim 8, wherein the impact modifying rubber is a methylmethacrylate/butadiene/styrene grafted
,t- copolymer (MBS rubber), acrylonitrile/butadiene/styrene grafted copolymer (ABS copolymer), or hydrogenated
styrene-butadiene copolymer.

10. A process for making the thermoplastic

2 molding composition claimed in any one of the preceding claims, comprising preparing a dry blend of
the polycarbonate, .polyamide and polyalkyloxazoline and, optionally, an impact modifying rubber and then melt-mixing the dry blend.
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