阅读说明：本技术 树脂固化剂体系中的改善 (Improvements in resin curing agent systems ) 是由 M·西蒙斯 S·莫蒂默 N·帕特尔 于 2018-07-05 设计创作，主要内容包括：提供了环氧树脂的固化剂体系,其包含烷基苯二胺和另外的芳族胺。也提供了：烷基苯二胺在用于生产纤维增强的复合材料的灌注方法中增强作为环氧树脂固化剂的芳族胺的性能的用途；可固化环氧树脂组合物,其包含环氧树脂和根据本发明的固化剂体系的混合物；根据本发明的组合物在纤维增强的复合材料的生产中作为可固化树脂的用途和/或在通过灌注方法进行的纤维增强的复合材料的生产中的用途；包含纤维增强材料和固化的环氧树脂的纤维增强的复合材料,该固化的环氧树脂可通过使根据本发明的可固化环氧树脂组合物固化获得；和生产纤维增强的复合材料的方法,其中铺叠纤维增强材料,和在80至130℃的温度将根据本发明的可固化环氧树脂组合物灌注通过纤维增强材料,以及一旦组合物已经灌注纤维增强材料,则将温度升高到150至190℃。(A curing agent system for epoxy resins is provided that includes an alkyl phenylenediamine and an additional aromatic amine. Also provided are: use of an alkyl phenylenediamine to enhance the performance of aromatic amines as curing agents for epoxy resins in a potting process for the production of fiber-reinforced composites; a curable epoxy resin composition comprising a mixture of an epoxy resin and a curing agent system according to the present invention; use of a composition according to the invention as a curable resin in the production of a fibre-reinforced composite and/or in the production of a fibre-reinforced composite by a infusion process; a fibre-reinforced composite material comprising a fibre-reinforcement and a cured epoxy resin, the cured epoxy resin being obtainable by curing a curable epoxy resin composition according to the present invention; and a process for producing a fibre-reinforced composite material, in which a fibre-reinforcement is laid up and a curable epoxy resin composition according to the invention is infused through the fibre-reinforcement at a temperature of from 80 to 130 ℃, and the temperature is raised to from 150 to 190 ℃ once the composition has been infused with the fibre-reinforcement.)

1. A curing agent system for epoxy resins comprising an alkyl phenylenediamine and an additional aromatic amine.

2. The curing agent system of claim 1, wherein the alkyl phenylenediamine is a toluene diamine having one or more additional alkyl and/or sulfanyl groups.

3. The curing agent system of claim 2, wherein the alkyl phenylene diamine has the formula:

and/or

Wherein Y is an alkyl group containing 1 to 4 carbon atoms, X is hydrogen or an alkyl group containing 1 to 4 carbon atoms, and R' are alkyl or alkylthio groups, preferably alkyl or alkylthio groups containing 1 to 4 carbon atoms.

4. The curative system of claim 3, wherein the compound of formula I has the structure:

5. The curing agent system of claim 3 or claim 4, wherein the compound of formula II has the structure:

or

6. The curing agent system of any one of claims 3 to 5, wherein the alkyl phenylenediamine comprises a mixture of a compound of formula I and a compound of formula II, preferably wherein the ratio of compound of formula I to compound of formula II is from 90:10 to 70:30, more preferably 80: 20.

7. The curing agent system of claim 6, wherein the alkyl phenylenediamine comprises a mixture of:

and

wherein the ratio of the two compounds is preferably 90% to 10% to 70% to 30%, more preferably 80% to 20%.

8. A curing agent system according to any preceding claim wherein the additional aromatic amine is an alkylene bridged aromatic amine.

9. The curing agent system of claim 8, wherein the additional aromatic amine is methylenedianiline, preferably 4,4' methylenedianiline.

10. The curing agent system of claim 9, wherein the methylenedianiline is of the formula:

wherein R is₁、R₂、R₃、R₄、R_1’、R_2’、R_3’And R_4’Independently selected from:

hydrogen;

C₁to C₆Alkoxy, preferably C₁To C₄Alkoxy, wherein the alkoxy may be linear or branched, such as methoxy, ethoxy, and isopropoxy;

C₁to C₆Alkyl, preferably C₁To C₄Alkyl, wherein the alkyl may be linear or branched and optionally substituted, such as methyl, ethyl, isopropyl and trifluoromethyl; or

Halogen, such as chlorine;

wherein R is₁、R₂、R₃、R₄、R_1’、R_2’、R_3’And R_4’Is at least one of C₁To C₆An alkyl group.

11. The curing agent system of claim 9 or claim 10, wherein the additional aromatic amine comprises a mixture of two or more methylenedianilines.

12. The curing agent system of any one of claims 9 to 11, wherein the additional aromatic amine comprises methylene bis (diethylaniline) (M-DEA), methylene bis (chlorodiethylaniline) (M-CDEA), methylene (methylethylaniline) - (chlorodiethylaniline) (M-mecdiea), or a mixture thereof.

13. The curing agent system according to any one of the preceding claims comprising 5 to 50 wt% of the alkylphenyl diamine, preferably 10 to 50 wt% of the alkylphenyl diamine, more preferably 20 to 40 wt% of the alkylphenyl diamine, based on the weight of the curing agent system.

14. The curing agent system of any preceding claim, wherein the mixture of the alkylphenylenediamine and the additional aromatic amine is a liquid at 22 ℃.

15. Use of an alkyl phenylenediamine in a potting process for the production of fiber-reinforced composites to enhance the properties of aromatic amines as curing agents for epoxy resins.

16. Use according to claim 15, wherein the alkylphenylenediamine is as defined in any one of claims 2 to 7 and/or the aromatic amine is a further aromatic amine as defined in any one of claims 8 to 12.

17. A curable epoxy resin composition comprising a mixture of an epoxy resin and the curing agent system of any one of claims 1 to 14.

18. The curable epoxy resin composition of claim 17, wherein the epoxy resin has a functionality of at least 2.

19. A curable epoxy resin composition according to claim 17 or claim 18, wherein the relative amount of amine groups provided by the curing agent system to epoxy groups provided by the epoxy resin is 0.7:1.3, preferably 0.8: 1.2.

20. The curable epoxy resin composition of any one of claims 17 to 19, having a viscosity of 10 to 100cP at 120 ℃ and a viscosity of 100 to 1000cP at 60 ℃.

21. Use of a composition according to any one of claims 17 to 20 as a curable resin in the production of a fibre-reinforced composite.

22. Use of a composition according to any one of claims 17 to 20 in the production of a fibre-reinforced composite by the infusion method.

23. A fibre-reinforced composite material comprising a fibre-reinforced material and a cured epoxy resin, wherein the cured epoxy resin is obtainable by curing the curable epoxy resin composition according to any one of claims 17 to 20.

24. A method of producing a fibre-reinforced composite material, wherein fibre-reinforcement is laid up and a curable epoxy resin composition according to any one of claims 17 to 20 is infused through the fibre-reinforcement at a temperature of from 80 to 130 ℃, and the temperature is raised to from 150 to 190 ℃ once the composition has infused the fibre-reinforcement.

25. The method of claim 24, wherein the fibrous reinforcing material is selected from the group consisting of: glass fibers, carbon fibers, graphite fibers, boron fibers, ceramic fibers or aramid fibers.

Examples