Patent US3754956A successfully refreshed from Google Patents.
US3754956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of oxide pigments
Assignee: Tronox Pigment UK Ltd
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Filing: 1971-03-02
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Granted: 1973-08-28
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Expires: 1991-03-02
Abstract
Abstract The wetting and dispersion characteristics of titania pigments in plastic materials is improved by treating the pigment with from 0.1-60.0 percent by weight of a polylactone having terminal hydroxy groups, the polylactone being in liquid form or in solution.
Inventors
- 👤 N House
- 👤 G Durrant
- 👤 M Gamon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:47
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/04; C08K; C08K9/00; C08K9/04; C09; C09C; C09C1/00; C09C1/36; C09C1/3692; C09C3/00; C09C3/006; C09C3/06; C09C3/063; C09C3/10; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
27 words
A process according to claim 1, wherein the quantity of the polylactone is not greater than 25.0 percent by weight, based on the weight of the pigment.
Claim 2
Dependent Claim
17 words
A process according to claim 1, wherein the polylactone comprises a polylactone of the general formula I,
Claim 3
Dependent Claim
22 words
A process according to claim 3, wherein any hetero atom in the carbon chain of the group R is an oxygen atom.
Claim 4
Dependent Claim
19 words
A process according to claim 3, wherein any lower alkyl substituent in the group R'' is a methyl group.
Claim 5
Dependent Claim
32 words
A process according to claim 3, wherein the group R is derived from a polyol selected from the group consisting of ethylene-, propylene-, and hexylene-glycols; trimethylol propane, glycerol, pentaerythritol, mannitol, and sorbitol.
Claim 6
Dependent Claim
27 words
A process according to claim 1, wherein the polylactone is one derived from a lactone selected from the group consisting of valerolactone, caprolactone, 3,3,5-trimethylcaprolactone, heptanolactone, and dodecanolactone.
Claim 7
Dependent Claim
17 words
A process according to claim 1, wherein the polylactone is one derived from ethylene glycol and caprolactone.
Claim 8
Dependent Claim
25 words
A process according to claim 1, wherein the pigment is in the form of an aqueous slurry prior to the incorporation of the polylactone therewith.
Claim 9
Dependent Claim
26 words
A process according to claim 9, wherein a solid polylactone is rendered liquid by heating and is then incorporated in liquid form with the aqueous slurry.
Claim 10
Dependent Claim
29 words
A process according to claim 9, wherein a solid polylactone is incorporated with the slurry, the temperature of the slurry being such that the polylactone melts on contact therewith.
Claim 11
Dependent Claim
19 words
A process according to claim 1, wherein an aqueous emulsion of a liquid polylactone is incorporated with the pigment.
Claim 12
Dependent Claim
29 words
A process according to claim 1, wherein a polylactone solution is incorporated with the pigment while the latter is in a dry condition, and the solvent is then evaporated.
Claim 13
Dependent Claim
32 words
A process according to claim 1, wherein a solid polylactone is mixed with the pigment, and the temperature is then raised to render the polylactone liquid and thereby effect the said incorporation.
Claim 14
Dependent Claim
37 words
A new article of manufacture which comprises a titanium dioxidE pigment with which has been incorporated from 0.1 to 60 percent by weight, based on the weight of the pigment, of a polylactone having terminal hydroxyl groups.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |