US4731409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous coating composition containing fine particles of water insoluble resin solution
Assignee: Nippon Paint Co Ltd
•
Filing: 1987-02-03
•
Granted: 1988-03-15
•
Expires: 2007-02-03
Abstract
Abstract An aqueous coating composition comprising (A) an aqueous medium, (B) at least one water soluble or dilutable resin which has a water tolerance of 4 or more and whose 1% by weight aqueous solution shows a surface tension of 51 dyne/cm or less, and (C) fine particles of resinous solution of water insoluble resin in a hydrophobic solvent, the particles being uniformly dispersed in the combination of said aqueous medium (A) and the water soluble or dilutable resin (B) and having a mean diameter of 1 mu or less, which is characterized in that the absolute value of difference in solubility parameter (¦ DELTA Sp¦) between said resinous solution and said water soluble or dilutable resin is within a range of ¦ DELTA Sp¦<2. The present coating composition is excellent in storage stability and application characteristics, resulting a coating with excellent gloss and surface smoothness.
Inventors
- 👤 Hiroshi Miwa
- 👤 Hideyoshi Noda
- 👤 Sakuichi Konishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:38
CPC Classifications
C; C08; C08L; C08L35/00; C09; C09D; C09D5/00; C09D5/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
119 words
An aqueous coating composition comprising (A) an aqueous medium, (B) at least one water soluble or dilutable resin which has a water tolerance of 4 or more and whose 1% by weight aqueous solution shows a surface tension of 51 dynes/cm or less, and (C) fine particles of resinous solution of water insoluble resin in a hydrophobic solvent, the particles being uniformly dispersed in the combination of said aqueous medium (A) and the water soluble or dilutable resin (B) and having a mean diameter of 1μ or less, which is characterized in that the absolute value of difference in solubility parameter (|ΔSp|) between said resinous solution and said water soluble or dilutable resin is within a range of |ΔSp|<2.
Claim 2
Dependent Claim
119 words
An aqueous coating composition comprising (A) an aqueous medium, (B) at least one water soluble or dilutable resin which has a water tolerance of 4 or more and whose 1% by weight aqueous solution shows a surface tension of 51 dynes/cm or less, and (C) fine particles of resinous solution of water insoluble resin in a hydrophobic solvent, the particles being uniformly dispersed in the combination of said aqueous medium (A) and the water soluble or dilutable resin (B) and having a mean diameter of 1μ or less, which is characterized in that the absolute value of difference in solubility parameter (|ΔSp|) between said resinous solution and said water soluble or dilutable resin is within a range of |ΔSp|<2.
Claim 3
Dependent Claim
46 words
A composition according to claim 1, wherein the water insoluble resin is selected from the group consisting of acrylic resin, oil-free polyester resin, alkyd resin, epoxy resin, aminoplast resin, acryl modified alkyd resin, acryl modified polyester resin, and has an acid value of 0 to 10.
Claim 4
Dependent Claim
30 words
A composition according to claim 1, wherein the water soluble or dilutable resin is an anionic resin having an acid value of 30 to 200 neutralized with a basic compound.
Claim 5
Dependent Claim
35 words
A composition according to claim 1, wherein the water soluble or dilutable resin is a cationic resin having 30 to 300 m mol nitrogen atoms per 100 g resinous solid, neutralized with an acidic compound.
Claim 6
Dependent Claim
106 words
A composition according to claim 1 wherein the water soluble or dilutible resin is selected from the group consisting of an anionic resin having an acid value of 30 to 200 neutralized with a basic compound and a cationic resin having 30 to 300 m mol nitrogen atoms per 100 g resinous solid, neutralized with an acidic compound and wherein the water insoluble resin is selected from the group consisting of an acrylic resin, an oil-free polyester resin, an alkyd resin, epoxy resin, an aminoplast resin, an acrylic modified alkyd resin, and an acryl modified polyester resin, and has an acid value of 0 to 10.
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) | 1991-03-15 | 1991-09-14 | 1992-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-15 | 1995-09-14 | 1996-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-15 | 1999-09-14 | 2000-03-15 | $7700.00 | Window Closed / Lapsed |