Isocyanate-polyamide block copolymers
AssigneeBASF SE
InventorsFrank Prissok, Florian Puch, Elmar Poeselt
Life of this patent
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Abstract
A thermoplastic polyamide can be obtained through the reaction of at least the components (i), (ii), and (iii), where a catalyst having a Lewis base component is used in the reaction. Component (i) is a composition containing a polymeric compound having two carboxylic acid moieties; component (ii) is a dicarboxylic acid composition containing at least one dicarboxylic acid; and component (iii) is a diisocyanate composition containing at least one diisocyanate. A process can be used for producing the thermoplastic polyamide and a method for the use thereof. A tandem reactive extruder can be used for the reaction.
Claims15
A process for producing a thermoplastic polyamide, the process comprising:
- reacting at least the following components:
- (i) a composition comprising a polymeric compound having two carboxylic acid moieties;
- (ii) a dicarboxylic acid composition;
- and
- (iii) a diisocyanate composition,
- wherein a catalyst having a Lewis base component is used in the reaction, wherein the catalyst is selected from the group consisting of N-methylimidazole, melamine, guanidine, cyanuric acid, dicyandiamide, and mixtures thereof,
- wherein the polymeric compound having two carboxylic acid moieties comprises at least HOOC—(CH2)xCOO-PTHF—OOC—(CH2)y—COOH,
- wherein PTHF is polytetrahydrofuran, and
- wherein x and y are independently an integer in the range from 1 to 10,
- wherein the reaction of the components (i), (ii), and (iii) takes place in a reactive extruder apparatus comprising at least two extruders.
Dependencies are inferred from the claim text.