Aqueous dispersions of fluorescent pigments
AssigneeDay-Glo Color Corp.
InventorsRobert G. Morrison, Jr., Steven G. Streitel, Jeffrey R. Cramm
Life of this patent
Estimating the term…
Abstract
An aqueous dispersion of a fluorescent pigment comprising: a water insoluble polymer; fluorescent dye; emulsifiers; and water. The polymer comprises: a water insoluble vinyl monomer free of polar groups; vinyl nitrile; a vinyl monomer containing sulfonate groups; and a polar vinyl monomer from the group consisting of: polar acrylate esters; vinyl acetate; polar methacrylate esters and a substituted acrylamide containing hydroxyl or carboxylic ester groups. The invention also relates to a fluorescent pigment and method for preparing the dispersion and pigment.
Claims9
An aqueous dispersion of a fluorescent pigment comprising:
- A. a fluorescent pigment comprising:
- 1. water insoluble polymer comprising at least four monomers, at least one monomer selected from each of the following groups (1) through (4):
- a. from about 40% to about 78.5% total polymer weight of water insoluble vinyl monomer free of polar groups;
- b. from about 15% to about 35% by total polymer weight of vinyl nitrile;
- c. from about 1.5% to about 5% by total polymer weight of vinyl monomer containing at least one sulfonate group;
- and
- d. from about 5% to about 20% total polymer weight of polar vinyl monomer selected from the group consisting of:
- (1) polar acrylate esters;
- (2) polar methacrylate esters;
- (3) vinyl acetate;
- (4) a substituted acrylamide containing hydroxyl or carboxylic ester groups;
- and
- (5) mixtures thereof;
- 2. fluorescent dye in an amount sufficient to impart fluorescent color to the pigment;
- B. water in an amount to provide a total solids content of from about 0.5% to less than 100%.
An aqueous dispersion of a fluorescent pigment comprising:
- A. a fluorescent pigment comprising:
- 1. water insoluble polymer comprising at least four monomers, at least one monomer selected from each of the following groups (1) through (4):
- a. from about 40% to about 78.5% total polymer weight of water insoluble vinyl monomer free of polar groups;
- b. from about 15% to about 35% by total polymer weight of vinyl nitrile;
- c. from about 1.5% to about 5% by total polymer weight of vinyl monomer containing at least one sulfonate group;
- and
- d. from about 5% to about 20% total polymer weight of a polar vinyl monomer selected from the group consisting of:
- (1) polar acrylate esters;
- (2) polar methacrylate esters;
- (3) vinyl acetate;
- (4) a substituted acrylamide containing hydroxyl or carboxylic ester groups;
- and
- (5) mixture thereof;
- 2. fluorescent dye in an amount sufficient to impart fluorescent color to the pigment;
- B. water in an amount to provide a total solids content of from about 0.5% to less than 100%.
Dependencies are inferred from the claim text.