Hydrophilic synthetic resins, esterified for stability to hydrolysis, which are particularly suitable for aqueous systems
AssigneeHuels Aktiengesellschaft
InventorHartwig Lange
Life of this patent
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Abstract
Hydrophilic, hydrolytically-stable synthetic resins obtainable by reacting a hydroxyl-functional synthetic resin such as a ketone, ketone/aldehyde and/or urea/aldehyde and/or a hydrogenated product of the hydroxyl-functional synthetic resin thereof with a polycarboxylic acid, polycarboxylic anhydride, polycarboxylic ester and/or polycarbonyl halide, where 70-100 mol % of the polycarboxylic acid and/or derivatives is linked chemically via an ester linkage to the hydroxyl-functional synthetic resin by way of only one single function and 0-30 mol % of the acid and/or acid derivative is so linked by way of more than one function.
Claims12
A hydrophilic, hydrolytically-stable synthetic resin obtained by reacting a hydroxyl-functional synthetic resin selected from the group consisting of a ketone, ketone/aldehyde, urea/aldehyde and a hydrogenated product of said hydroxy-functional synthetic resin thereof, with an acid or acid derivative selected from the group consisting of a polycarboxylic acid, polycarboxylic anhydride, polycarboxylic ester and polycarbonyl halide;
- wherein from about 70 to about 100 mol % of said acid or acid derivative is linked chemically via an ester linkage to said hydroxyl-functional synthetic resin by way of only one carboxyl function of said acid or derivative thereof and from about 0 to about 30 mol % of said acid or acid derivative is linked by way of more than one carboxyl function of said acid or derivative thereof.
An aqueous system comprising a hydrophilic, hydrolytically-stable synthetic resin obtained by reacting a hydroxyl-functional synthetic resin selected from the group consisting of a ketone, ketone/aldehyde, urea/aldehyde and a hydrogenated product of said hydroxyfunctional synthetic resin thereof, with an acid or acid derivative selected from the group consisting of a polycarboxylic acid, polycarboxylic anhydride, polycarboxylic ester and polycarbonyl halide;
- wherein from about 70 to about 100 mol % of said acid or acid derivative is linked chemically via an ester linkage to said hydroxyl-functional synthetic resin by way of only one carboxyl function of said acid or derivative thereof and from about 0 to about 30 mol % of said acid or acid derivative is linked by way of more than one carboxyl function of said acid or derivative thereof.
A process for preparing a hydrophilic, hydrolytically-stable synthetic resin, comprising:
- reacting a hydroxyl-functional synthetic resin selected from the group consisting of a ketone, ketone/aldehyde, urea/aldehyde, and a hydrogenated product of said hydroxylfunctional synthetic resin thereof, with an acid or acid derivative selected from the group consisting of a polycarboxylic acid, polycarboxylic anhydride, polycarboxylic ester, polycarbonyl halide and a mixture thereof, in the melt or in solution, in such a way that about 70 to about 100 mol % of said acid or acid derivative is linked chemically via an ester linkage to said hydroxyl-functional synthetic resin by way of only one carboxyl function of said acid or derivative thereof and from about 0 to about 30 mol % of said acid or acid derivative is so linked by way of more than one carboxyl function of said acid or derivative thereof;
- and wherein from about 0.3 to about 3 mol, of said acid or acid derivative is reacted per mol of said hydroxyl-functional synthetic resin.
Dependencies are inferred from the claim text.