US4489174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vesiculated beads
Assignee: Sherwin Williams Co
•
Filing: 1984-05-03
•
Granted: 1984-12-18
•
Expires: 2004-05-03
Abstract
Abstract Vesiculated beads having improved scattering efficiency and resistance to shrinkage are prepared by a process which comprises: (a) forming in the presence of a polyamine, as a water-in-oil emulsion, a stable dispersion of droplets of water in a solution of a carboxylic acid functional unsaturated polyester resin having an acid value of 8 to 20, and at least one ethylenically unsaturated monomer copolymerizable with the polyester; and (b) forming in an aqueous solution, as a water-in-oil-water emulsion, a stable dispersion of the globules of the droplet-containing amine neutralized solution of the carboxylic acid functional unsaturated polyester and copolymerizable monomer; and (c) polymerizing the polyester and copolymerizable monomer by free radical addition polymerization thereby producing granules of opaque, cross-linked vesiculated beads; wherein the polyamine contains at least 3 amine groups per molecule; and wherein the amine is present at a concentration such that there are at least about 2.0 amine groups per each carboxylic acid group.
Inventors
- 👤 Michael Karickhoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:30
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; C08J9/283; C08F; C08F299/00; C08F299/02; C08F299/04; C08F299/0407; C09; C09D; C09D7/00; C09D7/40; C09D7/65; C08J2367/00; C08J2367/06; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
169 words
An aqueous coating composition which comprises: (a) a water dispersible synthetic polymer; and (b) an opacifying amount of vesiculated beads wherein the vesiculated beads are prepared by a process which comprises: (i) forming in the presence of a polyamine, as a water-in-oil emulsion, a stable dispersion of droplets of water in a solution of a carboxylic acid functional unsaturated polyester resin having an acid value of 8 to 20, and at least one ethylenically unsaturated monomer copolymerizable with the polyester; and (ii) forming in an aqueous solution, as a water-in-oil-in-water emulsion, a stable dispersion of the globules of the droplet-containing amine neutralized solution of the carboxylic acid functional unsaturated polyester and copolymerizable monomer; and (iii) polymerizing the polyester and copolymerizable monomer by free radical addition polymerization thereby producing granules of opaque, cross-linked vesiculated beads; wherein the polyamine contains at least 3 amine groups per molecule; and wherein the amine is present at a concentration such that there are at least about 2.0 amine groups per each carboxylic acid group.
Claim 2
Dependent Claim
169 words
An aqueous coating composition which comprises: (a) a water dispersible synthetic polymer; and (b) an opacifying amount of vesiculated beads wherein the vesiculated beads are prepared by a process which comprises: (i) forming in the presence of a polyamine, as a water-in-oil emulsion, a stable dispersion of droplets of water in a solution of a carboxylic acid functional unsaturated polyester resin having an acid value of 8 to 20, and at least one ethylenically unsaturated monomer copolymerizable with the polyester; and (ii) forming in an aqueous solution, as a water-in-oil-in-water emulsion, a stable dispersion of the globules of the droplet-containing amine neutralized solution of the carboxylic acid functional unsaturated polyester and copolymerizable monomer; and (iii) polymerizing the polyester and copolymerizable monomer by free radical addition polymerization thereby producing granules of opaque, cross-linked vesiculated beads; wherein the polyamine contains at least 3 amine groups per molecule; and wherein the amine is present at a concentration such that there are at least about 2.0 amine groups per each carboxylic acid group.
Claim 3
Dependent Claim
19 words
The aqueous coating composition of claim 1 further characterized in that the vesiculated beads contain a pigment dispersed therein.
Claim 4
Dependent Claim
16 words
The aqueous coating composition of claim 2 further characterized in that the pigment is titanium dioxide.
Claim 5
Dependent Claim
41 words
The aqueous coating composition of claim 1 further characterized in that the polyamine is present at a concentration such that there are between 2.0 and about 10 amine groups per polyester resin carboxyl group during the formation of the water-in-oil emulsion.
Claim 6
Dependent Claim
40 words
The aqueous coating composition of claim 1 further characterized in that the carboxylic acid functional unsaturated polyester resin utilized in the manufacture of the vesiculated bead comprises the condensation reaction product of an unsaturated acid or anhydride and a diol.
Claim 7
Dependent Claim
33 words
The aqueous coating composition of claim 1 further characterized in that the carboxylic acid functional unsaturated polyester resin consists essentially of the condensation reaction product of propylene glycol, fumaric acid and phthalic anhydride.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-18 | 1988-06-18 | 1988-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-18 | 1992-06-18 | 1992-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-18 | 1996-06-18 | 1996-12-18 | $7700.00 | Window Closed / Lapsed |