Crosslinkage polymeric compounds

Claim 2

A polyester, which can be crosslinked under the action of electromagnetic waves, having an average molecular weight between 1000 and 50,000 as measured by viscometry of a 0.5% by weight solution in a 1:1 weight mixture of phenol and symmetrical tetrachloroethane, which is characterized by a structural formula comprising chain members of the formula ##STR64## in which MI denotes the maleimido group of formula I ##STR65## wherein R and R 1 independently of one another denote alkyl of 1 to 4 carbon atoms, or R and R 1 conjointly denote the remaining part of a five-membered to six-membered carbocyclic ring, Y 9 represents an aliphatic radical of 2 to 18 carbon atoms, or denotes a cycloaliphatic, araliphatic, carbocyclic-aromatic, heterocyclic-aromatic or heterocyclic-aliphatic radical containing, in each case, a total of at most up to 18 carbon atoms.

Claim 3

A polyester according to claim 1 wherein the maleimido group MI is ##STR66##

Claim 4

A polyester according to claim 2 wherein the maleimido group MI is ##STR67##

Claim 5

A polyester according to claim 1 wherein Y 9 denotes an aliphatic radical.

Claim 6

A polyester according to claim 4 wherein Y 9 is ethylene.

Claim 7

A polyester according to claim 1 which is a copolyester where Y 9 denotes a mixture of radicals; or which is characterized by a structural formula containing additionally carboxylic acid derived chain members free from maleimido groups of formula I, said members being derived from aliphatic, cycloaliphatic, araliphatic, carbocyclic-aromatic or heterocyclic-aromatic acids, with Y 9 being a single radical or a mixture of radicals.

Claim 8

A copolyester according to claim 6 wherein the acid derived chain members free of maleimido groups are derived from terephthalic acid.

Claim 9

A polyester, which can be crosslinked under the action of electromagnetic waves, having an average molecular weight of at least 1000 as measured by epoxy equivalent/kg having a range of 0.28 to 0.45, which is characterized by a structural formula comprising chain members selected from the group consisting of ##STR68## in which MI denotes the maleimido group of formula I ##STR69## wherein R and R 1 independently of one another denote alkyl of 1 to 4 carbon atoms, or R and R 1 conjointly denote the remaining part of a five-membered to six-membered carbocyclic ring. E denotes o-phenylene or ethylene, Q 1 and Q 2 independently of one another denote --NR 16 -- or --O-- and R 16 represents hydrogen, alkyl with 1-4 carbon atoms or phenyl, and R 12 , Y 10 and Y 11 independently of one another denote an aliphatic, cycloaliphatic, carbocyclic-aromatic, heterocyclic-aromatic or heterocyclic-aliphatic radical with, in each case, a total of up to at most 18 carbon atoms, and R 13 has the same definition as R 12 or represents one of the groupings ##STR70## or in the first mentioned formula the molecular radical --Q 1 -- R 12 --Q 2 -- can also denote a radical selected from the group consisting of ##STR71## said polyester being formed by reaction of monomers containing epoxy groups with monomers containing carboxyl or dicarboxylic acid anhydride groups.

Claim 10

A polyester, which can be crosslinked under the action of electromagnetic waves, having an average molecular weight of at least 1000 as measured by epoxy equivalent/kg having a range of 0.28 to 0.45, which is characterized by a structural formula comprising chain members selected from the group consisting of ##STR68## in which MI denotes the maleimido group of formula I ##STR69## wherein R and R 1 independently of one another denote alkyl of 1 to 4 carbon atoms, or R and R 1 conjointly denote the remaining part of a five-membered to six-membered carbocyclic ring. E denotes o-phenylene or ethylene, Q 1 and Q 2 independently of one another denote --NR 16 -- or --O-- and R 16 represents hydrogen, alkyl with 1-4 carbon atoms or phenyl, and R 12 , Y 10 and Y 11 independently of one another denote an aliphatic, cycloaliphatic, carbocyclic-aromatic, heterocyclic-aromatic or heterocyclic-aliphatic radical with, in each case, a total of up to at most 18 carbon atoms, and R 13 has the same definition as R 12 or represents one of the groupings ##STR70## or in the first mentioned formula the molecular radical --Q 1 -- R 12 --Q 2 -- can also denote a radical selected from the group consisting of ##STR71## said polyester being formed by reaction of monomers containing epoxy groups with monomers containing carboxyl or dicarboxylic acid anhydride groups.

Claim 11

A polyester according to claim 8 wherein the maleimido group MI is ##STR72##

Claim 12

A polyester according to claim 9 wherein the maleimido group MI is ##STR73##

Claim 13

A polyester, which can be crosslinked under the action of electromagnetic waves, having an average molecular weight of at least 1000 as measured by an epoxy equivalent/kg in the range of 0.35, which is obtained by the reaction of N-glycidyldimethylmaleimide with pentaerythritol tetrakis-(3-mercaptopropionate).

Claim 14

A polyester, which can be crosslinked under the action of electromagnetic waves, having an average molecular weight of at least 1000 as measured by an epoxy equivalent/kg in the range of 0.35, which is obtained by the reaction of N-glycidyldimethylmaleimide with pentaerythritol tetrakis-(3-mercaptopropionate).