Water dispersible polyamide building blocks
AssigneeLubrizol Advanced Materials, Inc.
InventorsAnthony D. Pajerski, Gabor Erdodi, Naser Pourahmady
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Abstract
Water dispersible polyamides having carboxylic acid groups are disclosed. These are made by reacting polycarboxyl is acids or anhydrides thereof with amine containing monomer or an amide terminated polyamide under reaction conditions such that a few of the carboxylic acid groups are residual and can promote dispersion in water. These polyamides after dispersion can be chain extended to higher molecular weight polymers or can be terminally functionalized with reactive groups such as isocyanate, epoxy, vinyl, acetoacetonate, or silanol groups. Composites and hybrids of these polyamides with vinyl polymers are also disclosed and claimed.
Claims23
A water dispersible polyamide comprising a polyamide condensation reaction product of at least one polycarboxylic acid and/or anhydride thereof with at least one amine monomer with a primary or secondary amine group or an amine terminated polyamide, wherein said polyamide reaction product has a titratable acid content derived from said at least one polycarboxylic acid of from about 1 to about 100 mg KOH/gram of polyamide.
A polyamide dispersion in water comprising:
- a) an aqueous continuous phase,
- b) a polyamide condensation reaction product of at least one polycarboxylic acid and/or anhydride thereof with at least one amine monomer with a primary or secondary amine group or an amine terminated polyamide, wherein said polyamide reaction product has a titratable acid content derived from said at least one polycarboxylic acid of from about 1 to about 100 mg KOH/gram of polyamide,
- c) wherein said polyamide condensation reaction product is characterized as dispersible in water and forms a colloidally stable dispersion of polyamide in water when mixed with water.
A process for forming a water dispersible polyamide building block comprising:
- a) reacting at least one polycarboxylic acid and/or anhydride thereof with at least one amine monomer with a primary or secondary amine group or an amine terminated polyamide forming a polyamide reaction product having on average at least two polyamide linkages per polyamide and having on average at least one terminal amine group with an abstractable H,
- b) controlling the ratio of carboxylic acid groups and amine groups such that the resulting molecules have a titratable acid content derived from said polycarboxylic acid and/or anhydride thereof from about 1 to about 60 mgKOH per gram of polyamide,
- c) if said acid content is not in the salt form, converting it to the salt form,
- d) dispersing said polyamide reaction product in an aqueous media to form a colloidally stable dispersion of polyamide in water.
The process of further comprising a step of chain extending said terminal primary or secondary amine groups by reacting them after said dispersing step with a polyfunctional reactant capable of forming a covalent bond to two or more different amine terminal groups.
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Dependencies are inferred from the claim text.