Biscarbodiimides and polycarbodiimides and method for their preparation
AssigneeDow Global Technologies LLC
InventorsAndrew M. Camelio, Arkady L. Krasovskiy
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Abstract
The present disclosure describes a method of synthesizing carbodiimides comprising providing an alkylisothiourea, providing a thiophilic reagent to the reaction mixture and reacting under conditions sufficient to provide the carbodiimide, and wherein the carbodiimide is a polycarbodiimide or a biscarbodiimide. The present disclosure further describes methods for isolating the carbodiimides. The present disclosure additionally describes isolated carbodiimide compositions.
Claims15
A method of synthesizing carbodiimides comprising:
- (a) providing an alkylisothiourea of formula (1) to a reaction mixture;
- where:
- R1═H;
- (C1-C40)hydrocarbyl, (C1-C40)heterohydrocarbyl;
- R2═(C1-C40)hydrocarbyl, (C1-C40)heterohydrocarbyl;
- R3═H;
- (C1-C40)hydrocarbyl, (C1-C40)heterohydrocarbyl;
- R4═H;
- or absent;
- R5═H;
- or absent;
- R6═(C1-C40)hydrocarbyl, (C1-C40)heterohydrocarbyl;
- R7═H;
- (C1-C40)hydrocarbyl, (C1-C40)heterohydrocarbyl;
- a is 0 or 1;
- b is from 0 to 10;
- and
- c is from 1 to 10.
- (b) providing a thiophilic reagent to the reaction mixture and reacting under conditions sufficient to provide the carbodiimide, and wherein the carbodiimide is a polycarbodiimide or a biscarbodiimide.
A carbodiimide having one of the following structures:
(canceled)
(canceled)
(canceled)
(canceled)
Dependencies are inferred from the claim text.