US4399237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vesiculated polymer granules containing TiO2
Assignee: EIDP Inc
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Filing: 1982-11-15
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Granted: 1983-08-16
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Expires: 2002-11-15
Abstract
Abstract Vesiculated polymer granules having high refractive indices can be made from an aqueous slurry of particulate TiO 2 if the slurry contains a phosphate ester.
Inventors
- 👤 William H. Morrison, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:55
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; C08J9/283; C08J3/00; C08J3/12; C08J3/16; C08J3/20; C08J3/205; C08J3/21; C08J3/215; C08J2367/00; C08J2367/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
102 words
A vesiculated pigment granule having a diameter of 1-50 microns, the granule comprising (a) 1-60%, by weight, of TiO 2 particles in a matrix of an unsaturated polyester resin cross-linked with a polymerizable unsaturated monomer, (b) 5-95%, by volume, of voids, and (c) 0.5-4.0%, by weight of the TiO 2 , of a phosphate ester represented by the structure (R--O--(CH.sub.2).sub.y ].sub.n O).sub.x PO.sub.4-x Z.sub.3-x where R is an aliphatic hydrocarbon radical of 4-16 carbon atoms, an octylphenol radical or a nonylphenyl radical, n is 4-12, x is 1 or 2, y is 2 or 3, and z is H, Na or K.
Claim 2
Dependent Claim
102 words
A vesiculated pigment granule having a diameter of 1-50 microns, the granule comprising (a) 1-60%, by weight, of TiO 2 particles in a matrix of an unsaturated polyester resin cross-linked with a polymerizable unsaturated monomer, (b) 5-95%, by volume, of voids, and (c) 0.5-4.0%, by weight of the TiO 2 , of a phosphate ester represented by the structure (R--O--(CH.sub.2).sub.y ].sub.n O).sub.x PO.sub.4-x Z.sub.3-x where R is an aliphatic hydrocarbon radical of 4-16 carbon atoms, an octylphenol radical or a nonylphenyl radical, n is 4-12, x is 1 or 2, y is 2 or 3, and z is H, Na or K.
Claim 3
Dependent Claim
36 words
The granule of claim 1 in which the phosphate ester is a 75/25 weight mixture of esters represented by the structure C.sub.10 H.sub.21 --OCH.sub.2 CH.sub.2).sub.6 OPO.sub.3 H.sub.2 and [C.sub.10 H.sub.21 --OCH.sub.2 CH.sub.2 --.sub.6 O].sub.2 PO.sub.2 H.
Claim 4
Dependent Claim
9 words
An aqueous slurry of granules according to claim 1.
Claim 5
Dependent Claim
9 words
An aqueous slurry of granules according to claim 2.
Claim 6
Dependent Claim
16 words
A coating composition comprising granules according to claim 1, a film-forming component and a liquid carrier.
Claim 7
Dependent Claim
16 words
A coating composition comprising granules according to claim 2, a film-forming component and a liquid carrier.
Claim 8
Dependent Claim
122 words
A method for preparing granules according to claim 1, the method comprising (a) adding 0.5-4.0% of a phosphate ester represented by the structure (R--O--(CH.sub.2).sub.y ].sub.n O).sub.x PO.sub.4-x Z.sub.3-x where R is an aliphatic hydrocarbon radical of 4-16 carbon atoms, an octylphenyl radical or a nonylphenol radical, n is 4-12, x is 1 or 2, y is 2 or 3, and z is H, Na or K, to an aqueous slurry of TiO 2 particles which contains a hydrophilic surfactant stabilizer, (b) forming a water-in-solution emulsion of the slurry in a solution of an unsaturated polyester resin in a liquid polymerizable unsaturated monomer cross-linking agent, and (c) emulsifying the emulsion in (b) in water to form a slurry of the granules in water.
Claim 9
Dependent Claim
16 words
The method of claim 7 having the additional step of separating the granules from the slurry.
References Cited (Backward Citations)
US3923704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-15 | 1987-02-14 | 1987-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-15 | 1991-02-14 | 1991-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-15 | 1995-02-14 | 1995-08-16 | $7700.00 | Window Closed / Lapsed |