Liquid accelerator composition for hardeners

Patent metadata

Field	Value
Publication number	US-9346911-B2
Application number	US-201214356043-A
Country	US
Kind code	B2
Filing date	Nov 20, 2012
Priority date	Dec 1, 2011
Publication date	May 24, 2016
Grant date	May 24, 2016

Abstract

A salicylic acid salt-containing liquid composition useful as an accelerator for a hardener includes a reaction product of (a) salicylic acid; and (b) at least one amine compound compatible with said salicylic acid such that the composition is in liquid form, the composition has a concentration of salicylic acid at from about 35 weight percent to about 55 weight percent, and the composition has a viscosity in the range of from about 500 mPas to about 20,000 mPa-s at 25° C.; a curable epoxy resin composition containing the salicylic acid salt-containing liquid composition accelerator; and a cured product made from the curable composition.

First claim

The invention claimed is:

1. A salicylic acid salt-containing liquid composition comprising a reaction product of (a) salicylic acid; and (b) at least one amine compound compatible with said salicylic acid, wherein the at least one amine compound comprises 2-methylpentanediamine, a polyetherdiamine, trimethylpentamethylene diamine, or mixtures thereof;
wherein the resulting composition comprises a liquid;
wherein the resulting composition has a concentration of salicylic acid at from about 1 weight percent to about 55 weight percent; and
wherein the resulting composition has a viscosity in the range of from about 500 mPa-s to about 20,000 mPa-s at 25° C.

2. The composition of claim 1 , wherein the at least one amine compound comprises 2-methylpentanediamine.

3. The composition of claim 1 , wherein the concentration of the salicylic acid comprises a range of from about 5 weight percent to about 50 weight percent.

4. The composition of claim 1 , wherein the concentration of the at least one amine compound comprises a range of from about 50 weight percent to about 95 weight percent.

5. A process for making an accelerator precursor for a hardener comprising admixing (a) salicylic acid; and (b) at least one amine compound, wherein the at least one amine compound comprises 2-methylpentanediamine, a polyetherdiamine, trimethylpentamethylene diamine, or mixtures thereof;
wherein the resulting precursor comprises a liquid;
wherein the resulting precursor has a high load of salicylic acid at a concentration of from about 1 weight percent to about 55 weight percent; and
wherein the resulting precursor has a viscosity of from about 500 mPa-s to about 20,000 mPa-s at 25° C.

6. A curable epoxy resin composition comprising (a) at least one epoxy resin, (b) a salicylic acid salt-containing liquid composition of claim 1 ; and (c) an amine hardener.

7. The composition of claim 6 , wherein the concentration of the epoxy resin comprises a range of from about 40 weight percent to about 90 weight percent.

8. The composition of claim 6 , wherein the concentration of the salicylic acid salt-containing liquid composition of claim 1 comprises a range of from about 0.1 weight percent to about 20 weight percent.

9. The composition of claim 6 , wherein the concentration of the amine hardener comprises a range of from about 5 weight percent to about 49.9 weight percent.

10. The composition of claim 6 , including an additive selected from a filler, a cure catalyst, a reactive diluent, a flexibilizing agent, a processing aide, a toughening agent, and a mixture thereof.

11. The composition of claim 10 , wherein the concentration of the additive ranges from about 0.1 weight percent to about 40 weight percent.

12. A process for making an epoxy resin curable composition comprising admixing (a) at least one epoxy resin, (b) a salicylic acid salt-containing liquid composition of claim 1 ; and (c) an amine hardener.

13. A cured product comprising a product made by curing the epoxy resin formulation composition of claim 6 .

14. A process for preparing a cured composite material comprising the steps of:
(a) providing a curable epoxy resin formulation composition of claim 6 ; and
(b) curing the composition of step (a) to form a cured composite.

Assignees

• Blue Cube Ip Llc

Inventors

• Schrötz Markus
• Grassini Stefano C
• Pfarherr Marcus
• Gaebel Jeurgen

Classifications

• C08G59/686 Primary

  containing nitrogen · CPC title

• C08G59/44

  Amides · CPC title

• C08G59/502

  Polyalkylene polyamines · CPC title

• C08G59/621

  Phenols · CPC title

• C08G59/5026 Primary

  cycloaliphatic · CPC title