POLYURETHANE-BASED PULTRUSION RESIN SYSTEM

• US 20120252973A1
• Filed: 11/30/2010
• Published: 10/04/2012
• Est. Priority Date: 12/01/2009
• Status: Active Grant

• Current Assignee: BASF SE
• Original Assignee: BASF SE
• Inventors: Nienkemper, Katrin, Neuhaus, Bert, Fisser-Schmalkuche, Daniela
• Granted Patent: US 8,663,414 B2
• Time in Patent Office: Days
• US Class Current: 524/875
• CPC Class Codes: B29C 70/52 Pultrusion, i.e. forming and compressing by continuously pulling through a die
• CPC Class Codes: C08G 18/222 metal compounds not provided for in groups C08G18/225 - C08G18/26
• CPC Class Codes: C08G 18/3206 aliphatic
• CPC Class Codes: C08G 18/341 Dicarboxylic acids, esters of polycarboxylic acids containing two carboxylic acid groups
• CPC Class Codes: C08G 18/6692 with compounds of group C08G18/34
• CPC Class Codes: C08G 18/7664 containing alkylene polyphenyl groups
• CPC Class Codes: C08G 18/7671 containing only one alkylene bisphenyl group

Abstract

The present invention relates to a pultrusion resin system, comprising (a) di- or polyisocyanates, (b) compounds having at least two groups reactive toward isocyanates, (c) catalyst, (d) polybasic acid with functionality greater than or equal to 2 and, optionally, (e) further auxiliaries and additives, where the boiling point of the polybasic acid is at least 200° C. at standard pressure and it is soluble in the compound having at least two groups reactive toward isocyanates. The invention further relates to a process for producing a pultrudate, and also to this pultrudate.

Claims

1-15. -15. (canceled)

16. A pultrusion resin system, comprising

a) a di- or polyisocyanate,

b) a compound having at least two groups reactive toward an isocyanate,

c) a catalyst,

d) a polybasic acid having a functionality greater than or equal to 2 and, optionally,

e) a further auxiliary or additive,

where a boiling point of the polybasic acid is at least 200°

C. at standard pressure and the polybasic acid is soluble in the compound having at least two groups reactive toward an isocyanate.

17. The pultrusion resin system of claim 16, wherein an acid number of the polybasic acid is 50 to 1000 mg KOH/g.

18. The pultrusion resin system of claim 16, wherein a molar ratio of oxygen atoms to carbon atoms in the polybasic acid is at least 1:

5.

19. The pultrusion resin system of claim 16, wherein the polybasic acid is a condensate comprising, in reacted form, an at least dibasic acid and a compound having a group reactive toward acid.

20. The pultrusion resin system of claim 16, wherein a proportion of the polybasic acid, based on a total weight of the compound having at least two groups reactive toward an isocyanate and of the polybasic acid is 0.1 to 10% by weight.

21. The pultrusion resin system of claim 16, wherein the polybasic acid has at least one further group having a functionality toward an isocyanate.

22. The pultrusion resin system of claim 16, wherein the di- or polyisocyanate comprises polymeric MDI having an average functionality of 2.1 to 2.8.

23. The pultrusion resin system of claim 16, wherein the compound having at least two groups reactive toward an isocyanate comprises a polyetherol having an average functionality of 2 to 4 and having a content of secondary OH groups of at least 50%.

24. The pultrusion resin system of claim 16, wherein the average OH number of the compound having at least two groups reactive toward an isocyanate is 100 to 1000 mg KOH/g.

25. The pultrusion resin system of claim 16, wherein a viscosity is less than 1500 mPas at 25°

C. immediately after mixing of components (a) to (e).

26. The pultrusion resin system of claim 16, comprising less than 2.0% by weight of substances which have a boiling point of less than 200°

C. at standard pressure.

27. A process for producing a pultrudate, comprising:

mixing the pultrusion resin system of claim 16, to obtain a reaction mixture;

wetting a fiber material with the reaction mixture, to obtain a wetted fiber material; and

hardening the wetted fiber material.

28. The process of claim 27, wherein the wetted fiber material is drawn through a die and hardened, where a temperature of the die is 150°

C. to 250°

C.

29. The process of claim 28, wherein a take-off speed at which the wetted fiber material is drawn through the die is greater than one meter per minute.

30. The process of claim 27, wherein the pultrudate comprises 30 to 90% by weight of the fiber material.

31. A pultrudate produced by the process of claim 27.

32. The pultrusion resin system of claim 23, wherein the polyetherol has an average functionality of 2.8 to 3.2.

33. The pultrusion resin system of claim 16, comprising 0.05 to 10% by weight of the catalyst, based on a total weight of components (b) to (e).

34. The pultrusion resin system of claim 16, comprising 0.1 to 2.5% by weight of the catalyst, based on a total weight of components (b) to (e).

35. The pultrusion resin system of claim 16, wherein an acid number of the polybasic acid is 100 to 800 mg KOH/g.