Stabilized acrylonitrile/acrylate molding compositions

• US 20120046408A1
• Filed: 06/27/2011
• Published: 02/23/2012
• Est. Priority Date: 07/12/2010
• Status: Active Grant

• Current Assignee: INEOS Styrolution Europe GmbH (Ineos AG)
• Original Assignee: BASF SE
• Inventors: Minkwitz, Rolf
• Granted Patent: US 10,294,348 B2
• Time in Patent Office: Days
• US Class Current: 524/504
• CPC Class Codes: C08K 5/16 Nitrogen-containing compounds C08K5/0091 takes precedence
• CPC Class Codes: C08K 5/315 Compounds containing carbon-to-nitrogen triple bonds
• CPC Class Codes: C08K 5/34 Heterocyclic compounds having nitrogen in the ring
• CPC Class Codes: C08L 25/08 Copolymers of styrene C08L29/08, C08L35/06, C08L55/02 take precedence
• CPC Class Codes: C08L 25/12 with unsaturated nitriles

Abstract

The present invention relates to a thermoplastic molding composition containing:

• • a) from 3 to 94.6% by weight of one or more styrene copolymers as component A,
  • b) from 5 to 95.2% by weight of one or more impact-modifying graft rubbers having no olefinic double bond in the rubber phase as component B
  • c) from 0.2 to 0.9% by weight of a compound of the formula (I) as component C:

The invention also relates to a process for producing the thermoplastic molding composition and a process for producing a molding, foil, or fiber which utilizing the thermoplastic molding composition. The invention further relates to a molding, fiber, or foil made of the thermoplastic molding composition.

Claims

1-18. -18. (canceled)

19. A thermoplastic molding composition comprising:

a) from 3 to 94.6% by weight of one or more styrene copolymers as component A

b) from 5 to 95.2% by weight of one or more impact-modifying graft rubbers having no olefinic double bond in the rubber phase as component B

c) from 0.2 to 0.9% by weight of a compound of the formula (I) as component C;

20. The thermoplastic molding composition according to claim 19, wherein with the proviso that if the amount of component D is 0% by weight the amount of component E is from 0.2 to 0.5% by weight, of one of the compounds III, IV, V, or VI, where each of the % by weight values is based on the sum weight of components A to G, and the sum of these values does not exceed 100% by weight

21. The thermoplastic molding composition according to claim 19, wherein swelling index of component B is from 6 to 20.

22. The thermoplastic molding composition according to claim 19, which uses, as component A, a copolymer of acrylonitrile, styrene, and/or α

-methylstyrene, phenylmaleimide, methyl methacrylate, or a mixture of these.

23. The thermoplastic molding composition according to claim 19 which uses, as component B, a mixture made of an acrylate-styrene-acrylonitrile (ASA) graft polymer which comprises

from 55 to 80% by weight, based on B, of an elastomerically crosslinked acrylate polymer B1 and comprises from 45 to 25% by weight, based on B, of a graft shell B2 made of a vinylaromatic monomer and made of one or more polar, copolymerizable, ethylenically unsaturated monomers, and optionally made of a further copolymerizable, ethylenically unsaturated monomer, in a ratio by weight of from 80:

20 to 65;

35.

24. The thermoplastic molding composition according to claim 23, wherein B1 is composed of from 0.01 to 20% by weight of a crosslinking monomer.

25. The thermoplastic molding composition according to claim 23, wherein B1 is composed of from 0.1 to 5% by weight of a butylene diacrylate, divinylbenzene, butanediol dimethacrylate, trimethylolpropane tri(meth)acrylate, diallyl methacrylate, diallyl maleate, diallyl fumarate, triallyl methacrylate, triallyl isocyanurate, diallyl phthalate, allyl methacrylate and/or dihydrodicyclopentadienyl acrylate.

26. The thermoplastic molding composition according to claim 23, wherein B1 is composed of from 0.1 to 5% by weight of diallyl phthalate, allyl methacrylate and/or dihydrodicyclopentadienyl acrylate.

27. The thermoplastic molding composition according to claim 19, wherein the average particle diameter of component B is from 50 to 1200 nm.

28. The thermoplastic molding composition according to claim 19, wherein component A comprise from 0 to 20% by weight of polymethyl methacrylate.

29. The thermoplastic molding composition according to claim 19 which uses components C and D in a ratio by weight of from 3:

1 to 1;

1 and components D and E in a ratio by weight of from 2;

1 to 0.5;

1.

30. The thermoplastic molding composition according to claim 19, which comprises from 0 to 1.5% by weight of phthalate or adipate.

31. The thermoplastic molding composition according to claim 23, wherein component B1 comprises from 2 to 99% by weight of butyl acrylate.

32. The thermoplastic molding composition according to claim 23, which uses styrene or α

-methylstyrene as vinylaromatic component in B2.

33. The thermoplastic molding composition according to claim 23, which uses, as ethylenically unsaturated component in B2, acrylonitrile and/or alkyl methacrylates and/or alkyl acrylates having C₁-C₈-alkyl radicals.

34. The thermoplastic molding composition according to claim 19, which uses component B in monomodal or bimodal form.

35. A process for producing the thermoplastic molding composition according to claim 19, which comprises mixing components A to F with one another at temperatures of from 100 to 300°

C. and at a pressure of from 1 to 50 bar in any sequence, and then kneading and extruding the material.

36. The process for producing the thermoplastic molding composition according to claim 19, which comprises premixing a portion of component B with a portion of component A to give a masterbatch in a ratio of from 1:

1 to 1;

2, and then the material is mixed with further components A to F to give the thermoplastic molding composition.

37. A process for producing a molding, foil, or fiber which comprises utilizing a thermoplastic molding compositions according to claim 19.

38. A molding, fiber, or foil made of the thermoplastic molding composition according to claim 19.