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US 9,365,731 B2Granted
Water-based polymer compositions for printing inks and coatings
AssigneeBASF SE
InventorsSarav Bharat Jhaveri, Chien Lu Hsu
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Abstract
A water-based coating composition including a continuous phase comprising water and a carboxylic acid-functional support polymer, a polycarbodiimide, an ketofunctionalized latex polymer, and a dihydrazide, and wherein the water-based coating composition undergoes a less than 25% increase in viscosity after 5 days of storage in a closed container under ambient conditions.
Claims17
A water-based coating composition comprising:
- a continuous phase comprising water and a carboxylic acid-functional support polymer;
- a polycarbodiimide;
- an keto-functionalized latex polymer;
- and
- a dihydrazide;
- and
- wherein:
- the water-based coating composition undergoes a less than 25% increase in viscosity after 5 days of storage in a closed container under ambient conditions;
- and
- the carboxylic acid-functional support polymer is an alkali soluble resin.
7 more elements
A process for preparing a water-based coating composition comprising:
- mixing a polycarbodiimide with a cross-linkable polymer supported emulsion to form a ink composition;
- wherein:
- the cross-linkable polymer supported emulsion is prepared by a second process, the second process comprising:
- charging a neutralized carboxylic acid-functional support polymer dissolved in water to a reactor;
- charging a (meth)acrylate and a styrenic monomer to the reactor;
- charging a keto-functionalized monomer dissolved in water to the reactor;
- charging a dihydrazide dissolved in water to the reactor;
- and
- charging a base to the reactor;
- and
- agitating the neutralized carboxylic acid-functional support polymer, the (meth)acrylate, the styrenic monomer, the keto-functionalized monomer, the dihydrazide, and the base at a temperature and for a time period sufficient to prepare the cross-linkable polymer supported emulsion.
8 more elements
Dependencies are inferred from the claim text.