Functionalized copolymers, process for their production, moulding compounds containing them and mouldings

• US 6,043,315 A
• Filed: 11/20/1997
• Issued: 03/28/2000
• Est. Priority Date: 05/31/1995
• Status: Expired due to Fees

• Current Assignee: BASF AG (BASF SE)
• Original Assignee: BASF AG (BASF SE)
• Inventors: Engelhardt, Ralf, Weiss, Robert, Gottschalk, Axel, Koch, Jurgen
• Primary Examiner(s): Warzel, Mark L.
• Application Number:
  US08/930,054
• Time in Patent Office: 859 Days
• Field of Search: 525/92 B, 525/92 D, 525/314, 525/71, 525/68, 525/66, 525/132, 525/151, 525/152, 525/171, 525/250, 525/271, 525/299, 525/301, 524/505, 524/538
• US Class Current: 525/92.00B
• CPC Class Codes: C08F 297/04 polymerising vinyl aromatic monomers and conjugated dienes
• CPC Class Codes: C08F 8/00 Chemical modification by after-treatment graft polymers, block polymers, crosslinking with unsaturated monomers or with polymers C08F251/00 - C08F299/00; of conjugated diene rubbers C08C
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/14 Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
• CPC Class Codes: C08L 2666/24 Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
• CPC Class Codes: C08L 53/02 of vinyl-aromatic monomers and conjugated dienes
• CPC Class Codes: C08L 71/12 Polyphenylene oxides
• CPC Class Codes: C08L 77/00 Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08; Compositions of derivatives of such polymers

Abstract

A functionalized copolymer of the formula

A--B--Z--X

where

A is a block of vinylaromatic monomers of 8 to 20, preferably 8 to 12, carbon atoms,

B is a block of alkadiene monomers of 4 to 12, preferably 4 to 8, carbon atoms,

Z is a fundamental building block of a compound having sterically hindering groups and

X is a functionalized fundamental building block,

a process for its preparation, thermoplastic molding materials containing said copolymer, processes for their preparation, the use for the production of moldings and moldings comprising said molding materials.

Claims

1. A functionalized copolymer of the formula

View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)

2. A functionalized copolymer as defined in claim 1, wherein A is a block of styrene and/or α

-methylstyrene and/or B is a block of butadiene and/or isoprene.

3. A functionalized copolymer as defined in claim 1, wherein Z is a fundamental building block of the formula ##STR7## where R is hydrogen or C₁ -C₄ -alkyl;

and Aryl is C₆ -C₁₀ -aryl.

4. A functionalized copolymer as defined in claim 1, wherein the functionalized fundamental building block contains a terminal acid anhydride group or amino group.

5. A process for the preparation of a functionalized copolymer as defined in claim 1, wherein

a) vinylaromatic monomers and alkadiene monomers are subjected to anionic polymerization to give a first living copolymer of the formula A--B³¹ containing a block A and a block B,

b) the first living copolymer is reacted with a compound having sterically hindering groups to give a second living copolymer of the formula A--B--Z.sup.⊖

and

c) the second living copolymer is reacted with a functional group of a difunctional or polyfunctional compound to give a copolymer of the formula A--B--Z--X, where A, B, Z and X are defined in claim 1.

6. A thermoplastic molding material containing

(a) from 0.1 to 20% by weight of at least one functionalized copolymer as defined in claim 1,

(b) from 1 to 98.9% by weight of at least one polyphenylene ether,

(c) from 1 to 98.9% by weight of at least one vinylaromatic polymer,

(d) from 0 to 50% by weight of at least one reinforcing agent and

(e) from 0 to 60% by weight of further additives and/or processing assistants,

the amounts of the components (a) to (e) together being 100% by weight.

7. A process for the preparation of unreinforced or reinforced, thermoplastic molding materials as defined in claim 6, wherein the components (a), (b), (c), (d) and (e), if present, are mixed in an extruder at from 200 to 320°

C., if required component (d) being coated with component (a), and the coated component (d) being introduced into an orifice of an extruder and being mixed in the extruder with the molten components (b) and (c) and, if required, (e).

8. A thermoplastic molding material containing

(a) from 0.1 to 40% by weight of at least one functionalized copolymer as defined in claim 1,

(b) from 1 to 98.9% by weight of at least one polyphenylene ether,

(c) from 0 to 97.9% by weight of at least one vinylaromatic polymer,

(d) from 0 to 50% by weight of at least one reinforcing agent and

(e) from 0 to 60% by weight of further additives and/or processing assistants and

(f) from 1 to 98.9% by weight of at least one polyamide, the amounts of the components (a) to (f) together being 100% by weight.

9. A process for the preparation of unreinforced or reinforced, thermoplastic molding materials as defined in claim 8, wherein the components (a), (b), (c), (d), (e) and (f), if present, are mixed in an extruder at from 200 to 320°

C., component (f) being introduced into an orifice of an extruder and being mixed in the extruder with the molten components (a), (b), (c) and (e), and it being possible for component (d) to be mixed with component (f) and/or with components (a), (b), (c) and (e).

10. A molding comprising a molding material as defined in claim 7 or 8.

11. A functionalized copolymer as defined in claim 1, wherein A is a block of vinylaromatic monomers of 8 to 12 carbon atoms.

12. A functionalized copolymer as defined in claim 1, wherein B is a block of alkadiene monomers of 4 to 8 carbon atoms.

13. A process for producing injection moldings, fibers and films by melt extrusion of the thermoplastic molding material defined in claim 6.

14. The process of claim 5, wherein said difunctional or polyfunctional compound is the 1,2-anhydride chloride of 1,2,4-benzenetricarboxylic acid.