Solubilized additive composition comprising acidic and basic constituents
Disclosed is a polymer additive composition and solution of the additive having more than about 5 w % solubility in a mixture of water and water soluble organic compounds comprising: a substantially water insoluble polymer additive capable of forming a salt, the polymer additive having less than about 1 w % water solubility, and a counterpart salt forming species. A process for using these polymer additive compositions and solutions is disclosed wherein the additive or the additive solution is added prior to or optionally during or optional after a polymerisation process to form polyamides or polyesters.
1 . A polymer additive composition having more than about 5 w % water solubility comprising: a substantially water insoluble polymer additive capable of forming a salt, said polymer additive having less than about 1 w % water solubility, and a counterpart salt forming species.
2 . A polymer additive composition having more than about 5 w % solubility in a mixture of water and water soluble organic compounds comprising: a substantially water insoluble polymer additive capable of forming a salt, said polymer additive having less than about 1 w % water solubility, and a counterpart salt forming species.
3 . A solution of the composition according to claim 1 in water.
4 . A solution of the composition according to claims 1 or 2 in a mixture of water and water soluble organic compounds.
5 . A composition according to any of claims 1 - 2 wherein when the additive is inherently basic and the counterpart salt forming species is inherently acidic, and wherein said inherently acid counterpart salt is selected from the group comprising: adipic acid, terephthalic acid, and isophthalic acid.
6 . A composition according to any of claims 1 - 2 wherein when the additive is inherently acidic and the counterpart salt forming species is inherently basic, and wherein said inherently basic counterpart salt is selected from the group comprising hexamethylenediamine, 2-methylpentamethylenediamine, and m-Xylylenediamine.
7 . A composition according to any of claims 1 - 2 wherein the substantially water insoluble additive is N,N′-bis(2,2,6,6-tetramethyl-4-piperidinyl)-1,3-benzenedicarboxamide.
8 . A composition according to any of claims 1 - 2 wherein the substantially water insoluble additive is bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate).
9 . A composition according to any of claims 7 or 8 wherein the counterpart salt forming species is a dicarboxylic acid.
10 . A composition according to claim 7 comprising a dry mixture of N,N′-bis(2,2,6,6-tetramethyl-4-piperidinyl)-1,3-benzenedicarboxamide and adipic acid.
11 . A composition according to claim 7 comprising the dry salt of N,N′-bis(2,2,6,6-tetramethyl-4-piperidinyl)-1,3-benzenedicarboxamide and adipic acid.
12 . A composition according to claims 1 - 2 wherein the substantially water insoluble additive is 3-(3,5-di-t-butyl-4-hydroxyphenyl)propionic acid.
13 . A composition according to claim 10 wherein the counterpart salt forming species is a diamine.
14 . A composition according to claim 4 wherein the water soluble organic compound is caprolactam.
15 . A process wherein the composition according to any one of claims 1 - 4 is added prior to or during a polymerisation process.
16 . A process wherein the composition according to any one of claims 1 - 4 is added after a polymerisation process.