MATERIALS, METHODS FOR PRODUCTION THEREOF AND COMPONENTS THEREOF

• US 20110294929A1
• Filed: 05/24/2011
• Published: 12/01/2011
• Est. Priority Date: 05/27/2010
• Status: Active Grant

• Current Assignee: BASF SE
• Original Assignee: BASF SE
• Inventors: Thome, Anna, Widler, Juergen, Cristadoro, Anna, Bruchmann, Bernd
• Granted Patent: US 8,436,125 B2
• Time in Patent Office: Days
• US Class Current: 524/94
• CPC Class Codes: C08G 18/346 having four carboxylic acid groups
• CPC Class Codes: C08G 18/7664 containing alkylene polyphenyl groups
• CPC Class Codes: C08G 18/792 formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates
• CPC Class Codes: C08G 73/1035 from tetracarboxylic acids or derivatives and diisocyanates
• CPC Class Codes: C08L 21/00 Compositions of unspecified rubbers
• CPC Class Codes: C08L 2205/03 containing three or more polymers in a blend
• CPC Class Codes: C08L 2666/20 Macromolecular compounds having nitrogen in the main chain according to C08L75/00 - C08L79/00; Derivatives thereof
• CPC Class Codes: C08L 75/04 Polyurethanes
• CPC Class Codes: C08L 79/08 Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors

Abstract

The present invention relates to materials comprising

• • (A) at least one rubber,
  • (B) at least one polyimide selected from branched condensation products of
    • (a) at least one polyisocyanate having on average more than two isocyanate groups per molecule, and
    • (b) at least one polycarboxylic acid having at least 3 COOH groups per molecule or anhydride thereof.

Claims

1. A material comprising

(A) at least one rubber,

(B) at least one polyimide selected from branched condensation products of

(a) at least one polyisocyanate having on average more than two isocyanate groups per molecule, and

(b) at least one polycarboxylic acid having at least 3 COOH groups per molecule or anhydride thereof.

2. The material according to claim 1, wherein polyimide (B) is selected from those polyimides that have a molecular weight M_w of at least 1000 g/mol.

3. The material according to claim 1 or 2, wherein, as polycarboxylic acid (b), a polycarboxylic acid having at least 4 COOH groups per molecule, or the relevant anhydride, is selected.

4. The material according to any one of claims 1 to 3, wherein polyisocyanate (a) is selected from oligomeric hexamethylene diisocyanate, oligomeric tetramethylene diisocyanate, oligomeric isophorone diisocyanate, oligomeric diphenylmethane diisocyanate, trimeric tolylene diisocyanate and mixtures of the abovementioned polyisocyanates.

5. The material according to any one of claims 1 to 4, wherein it in addition comprises

(C) at least one polyurethane.

6. The material according to claim 5, wherein polyurethane (C) is selected from aromatic polyurethanes.

7. The material according to any one of claims 1 to 6, wherein rubber (A) is selected from butadiene rubber (BR), styrene butadiene rubber (SBR), isoprene rubber (IR), styrene isoprene butadiene rubber (SIBR), acrylonitrile butadiene rubber (NBR), chloroprene rubber (CR), isobutene isoprene rubber (IIR), ethylene propylene diene rubber (EPDM) and natural rubber (NR) or mixtures of at least two of the abovementioned rubbers.

8. The material according to any one of claims 1 to 7, wherein polyimide (B) has a polydispersity M_w/M_n of at least 1.4.

9. The material according to any one of claims 1 to 8, wherein it additionally comprises at least one additive (D) which comprises at least one acid and at least one compound having two functional groups that can react with isocyanate.

10. A method for producing materials according to any one of claims 1 to 9, which comprises, mixing with one another

(A) at least one rubber,

(B) at least one polyimide selected from branched condensation products of

(a) at least one polyisocyanate having on average more than two isocyanate groups per molecule, and

(b) at least one polycarboxylic acid having at least 3 COOH groups per molecule or anhydride thereof, and

(C) optionally at least one polyurethane.

11. The method according to claim 10, wherein polyimide (B) has a polydispersity M_w/M_n of at least 1.4.

12. A polyimide having a polydispersity M_w/M_n of at least 1.4, selected from branched condensation products of

(a) at least one polyisocyanate having more than two isocyanate groups per molecule and

(b) at least one polycarboxylic acid having at least 3 COOH groups per molecule or anhydride thereof.

13. The polyimide according to claim 12, wherein polyisocyanate (a) is selected from oligomeric hexamethylene diisocyanate, oligomeric tetramethylene di socyanate, oligomeric isophorone diisocyanate, oligomeric diphenylmethane diisocyanate, trimeric tolylene diisocyanate and mixtures of the abovementioned polyisocyanates.

14. The polyimide according to claim 12 or 13, wherein, as polycarboxylic acid (b), a polycarboxylic acid having at least 4 COOH groups per molecule, or the relevant anhydride, is selected.

15. A method for producing polyimides according to any one of claims 12 to 14, which comprises reacting with one another

(a) at least one polyisocyanate having on average more than two isocyanate groups per molecule, and

(b) at least one polycarboxylic acid having at least 3 COOH groups per molecule or anhydride thereof

in the presence of a catalyst.

16. The method according to claim 15, wherein the catalyst is selected from water or Brø

nsted bases.