Polyisocyanatoimido compositions and imide group containing polymers prepared therefrom
AssigneeRhone-Poulenc Industries
InventorsJean-Louis Locatelli, Jean Robin
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Abstract
A coating or molding composition including a polyisocyanate, an unsaturated imide and an olefinically unsaturated comonomer copolymerizable with the unsaturated imide, and having a ratio of total isocyanate functions to total polymerizable double bonds in the imide in the range of from 0.3 to 15, is addition polymerized to hard, imide group containing polymers characterized by the recurring unit: ##STR1## Coatings and shaped articles formed from such polymers are hard, tough, thermally stable, solvent resistant and are good insulators.
Claims15
A composition of matter comprising (A) at least one organic polyisocyanate, (B) at least one unsaturated imide selected from the group consisting of:
- (i) a monoimide of the formula:
- ##STR15## wherein D represents ##STR16## in which Y is H, CH.sub.3 or Cl, and Z is either 0, 1 or 2, and R.sub.1 is hydrogen or a monovalent aliphatic, cycloaliphatic or aromatic hydrocarbon radical containing up to 20 carbon atoms;
- and
- (ii) a polyimide of the formula:
- ##STR17## wherein D is as above, n is a number ranging from 2 to 5 and R.sub.2 is a radical having the valence n, such R.sub.2 radical being selected from the group consisting of a wholly hydrocarbon radical, a heteroatom interrupted hydrocarbon radical, a heterocycle radical and a heterocycle containing hydrocarbon radical and wherein said composition the ratio r of total isocyanate functions in the polyisocyanate (A) to total polymerizable double bonds in the unsaturated imide (B) is in the range of from 0.3 to 15, and (C) an additional comonomer which is an olefinically unsaturated comonomer copolymerizable with the unsaturated imide (B).
Dependencies are inferred from the claim text.