N,N'-bis(maleimide)/hindered diamine copolymerizate
AssigneeCiba-Geigy Corporation
InventorPascal Barthelemy
Life of this patent
Estimating the term…
Abstract
Novel imido copolymers having improved thermal properties and well adapted for the production, e.g., of molded and cellular shaped articles, and laminates, are formed from (a) at least one N,N'-bis(maleimide), (b) at least one hindered diprimary diamine, e.g., of 4,4'-diamino-3,3',5,5'-tetraalkyldiphenylmethane or 1,3- or 1,4-(diamino)trialkylbenzene type, and, optionally, either (c.sub.1) at least one N-[(meth)allyloxyphenyl]maleimide or (c.sub.2) admixture of at least one N-[(meth)allyloxyphenyl]maleimide with at least one N-[(meth)allyloxymono/di(meth)allylphenyl]maleimide.
Claims15
An imido polymer comprising the copolymerizate of (a) at least one N,N'-bis(maleimide), with (b) at least one hindered diprimary diamine having the general formula (II):
- ##STR17## in which the symbols R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which are identical or different, are each a methyl, ethyl, propyl or isopropyl radical;
- and the symbols Z, which are identical or different, are each a hydrogen atom or a chlorine atom;
- or the general formula (III):
- ##STR18## which the amino radicals are in the meta or para position relative to each other;
- and the symbols R.sub.5, which are identical or different, are each a methyl, ethyl, propyl or isopropyl radical;
- and (c.sub.2) an admixture of at least one N-[(meth)allyloxyphenyl]maleimide with at least one N-(meth)-allyloxy-(meth)allylphenyl]maleimide.
An imido polymer comprising a copolymerizate of a comonomer reactant mixture comprising (a) at least one N,N'-bis(maleimide), and (b) at least one hindered diprimary diamine having the general formula (II):
- ##STR23## in which the symbols R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which are identical or different, are each a methyl, ethyl, propyl or isopropyl radical;
- and the symbol Z is a chlorine atom.
Dependencies are inferred from the claim text.