US3808019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of pigment compositions for coloring polyolefins
Assignee: Hoechst AG
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Filing: 1973-01-24
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Granted: 1974-04-30
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Expires: 1993-01-24
Abstract
Abstract A process for the preparation of pigment compositions, which comprises adding to the pigments an aqueous solution of an alkali metal silicate and a polyethylene dispersion and working up the mixture in a manner usual for pigments. The pigment compositions thus obtained are useful for coloring polyethylene films and sheets or for dyeing polyolefins in a spinning solution. The compositions show an excellent pigment distribution and tinctorial strength which is substantially better than those of compositions prepared without the addition of alkali metal silicates.
Inventors
- 👤 A Spange
- 👤 R Deubel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:21
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08K; C08K3/00; C08K3/34; C09; C09B; C09B67/00; C09B67/006; C08J2323/00; C08J2323/02; C08J2423/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
69 words
In a process for preparing an organic or inorganic pigment composition, the improvement which comprises adding to the pigment composition during its preparation about 2 percent to about 10 percent of water-soluble alkali metal silicate solution and about 5 percent to about 95 percent of a dispersed or suspended ethylene polymer of molecular weight about 2,000 to about 30,000, said amounts being by weight of the finished pigment composition.
Claim 2
Dependent Claim
21 words
A process improvement according to claim 2 wherein about 30 percent to about 80 percent of said ethylene polymer is added.
Claim 3
Dependent Claim
30 words
A process improvement according to claim 2 wherein said alkali metal silicate is potassium silicate or sodium silicate having a molar ratio of SiO2:Na2O/K2O of about 1:1 to about 4:1.
Claim 4
Dependent Claim
18 words
A process improvement according to claim 2 wherein said silicate solution is about 35* to about 60* Baume.
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) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |