Additives, Corresponding Uses, Insulation Systems, and Electric Machines

1 . A solid insulation material based on a resin containing epoxy groups for production of an anhydride-free insulation system by means of VPI, the material comprising:

an anhydride-free curing catalyst; and

an additive for improving distribution of the anhydride-free curing catalyst, wherein the additive comprises a

phenyl carboxylate;

wherein the additive is present in an amount based on the epoxy groups in the resin containing epoxy groups which is present in the impregnating agent of at least 0.1% in stoichiometric terms.

2 . The solid insulation material as claimed in claim 1 , wherein the phenyl carboxylate is a compound of the following general structure I:

with n in the range from 1 to 5, n=1-5;

m in the range from 1 to 10, m=1-10;

R 1 /R 2 =identical or different and

selected from the group of the following radicals

R 1 =

H,

alkyl, linear or branched or cyclic with 1 to 12 carbon atoms, or

aryl having 6 to 12 carbon atoms, with or without side chains;

R 2 =

H,

alkyl, linear or branched or cyclic with 1 to 12 carbon atoms,

aryl having 6 to 12 carbon atoms

sulfonyl

sulfate

phosphonyl

phosphate or

siloxane, linear or branched or cyclic with 1 to 50 Si—O units.

3 . The solid insulation material as claimed in claim 1 , wherein the phenyl carboxylate is a compound of the following general structure II:

with

n in the range from 1 to 5, n=1-5;

m in the range from 1 to 10, m=1-10;

R 1 /R 2 =identical or different and

selected from the group of the following radicals

R 1 =

H,

alkyl, linear or branched or cyclic with 1 to 12 carbon atoms, or

aryl having 6 to 12 carbon atoms, with or without side chains;

R 2 =Π,

alkyl, linear or branched or cyclic with 1 to 12 carbon atoms, or

aryl having 6 to 12 carbon atoms in the aromatic system, with or without side chains;

acyl.

4 . The solid insulation material as claimed in claim 1 , wherein the phenyl carboxylate is a compound of the following general structure III:

where

n is in the range from 1 to 10, n=1-10;

R 1 /R 2 =identical or different and

selected from the group of the following radicals

R 1 =

H,

alkyl, linear or branched or cyclic with 1 to 12 carbon atoms, or

aryl having 6 to 12 carbon atoms, with or without side chains;

R 2 =

aryl having 6 to 12 carbon atoms in the aromatic system,

alkylaryl having 2 to 4 phenyl units

biphenyl

R 3 =absent or

alkyl, linear or branched or cyclic with 1 to 12 carbon atoms, or

aryl having 6 to 12 carbon atoms in the aromatic system;

alkylaryl having 2 to 4 phenyl units biphenyl.

5 . The solid insulation material as claimed in claim 1 , wherein the phenyl carboxylate is a compound of the following general structure IV:

where

n is in the range from 1 to 10, n=1-10;

R 1 =identical or different and

selected from the group of the following radicals

R 1 =

H,

alkyl, linear or branched or cyclic with 1 to 12 carbon atoms, or

aryl having 6 to 12 carbon atoms, with or without side chains;

R 2 =

aryl having 6 to 12 carbon atoms in the aromatic system,

alkylaryl having 2 to 4 phenyl units

biphenyl.

6 . The solid insulation material as claimed in claim 1 , wherein the phenyl carboxylate is a compound of the following general structure V:

where

n is in the range from 1 to 10, n=1-10;

R 1 =identical or different and

selected from the group of the following radicals

R 1 =

H,

alkyl, linear or branched or cyclic with 1 to 12 carbon atoms, or

aryl having 6 to 12 carbon atoms, with or without side chains;

R 2 =

aryl having 6 to 12 carbon atoms in the aromatic system,

alkylaryl having 2 to 4 phenyl units

biphenyl

acyl

carboxyl.

7 . The solid insulation material as claimed in claim 1 , wherein the additive phenyl carboxylate is a compound of the following general structure VI:

where

n is in the range from 1 to 10, n=1-10;

R 1 =identical or different and

selected from the group of the following radicals

R 1 =

H,

alkyl, linear or branched or cyclic with 1 to 12 carbon atoms, or

aryl having 6 to 12 carbon atoms, with or without side chains;

R 2 =

aryl having 6 to 12 carbon atoms in the aromatic system,

alkylaryl having 2 to 4 phenyl units

biphenyl

acyl

carboxyl.

8 . The solid insulation material as claimed in claim 1 , wherein the phenyl carboxylate is selected from the group consisting of:

9 . The solid insulation material as claimed in claim 1 , wherein the phenyl carboxylate is selected from the group consisting of:

10 . The solid insulation material as claimed in claim 1 , wherein the additive, based on the epoxy groups in the resin containing epoxy groups which is present in the impregnating agent, is present in an amount in the range from 10% to 100% in terms of stoichiometry.

11 . The solid insulation material claimed in claim 1 , wherein the additive, based on the epoxy groups in the resin containing epoxy groups which is present in the impregnating agent, is present in an amount in the range from 50% to 100% in terms of stoichiometry.

12 - 13 . (canceled)

14 . An insulation system for an electrical rotating machine, the system comprising:

solid insulation material based on a resin containing epoxy groups for production of an anhydride-free insulation system by means of VPI, the material comprising:

an anhydride-free curing catalyst;

and additive for improving distribution of the anhydride-free curing catalyst, wherein the additive comprises a phenyl carboxylate;

wherein the additive is present in an amount based on the epoxy groups in the resin containing epoxy groups which is present in the impregnating agent of at least 0.1% in stoichiometric terms.

15 . An electrical machine with an insulation system as claimed in claim 14 .