US3985691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particulate nitrocellulose composition
Assignee: Societe Nationale des Poudres et Explosifs
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Filing: 1974-08-12
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Granted: 1976-10-12
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Expires: 1994-08-12
Abstract
Abstract A new particulate nitrocellulose composition comprises nitrocellulose and 10 - 30% by weight of a hydroxylic plasticizer containing at least one free hydroxyl group. A protective water-soluble colloid is used to prepare the compositions. The compositions are particularly valuable for the manufacture of polyurethane lacquers, and improve the resistance of the lacquers to solvents and to migration of plasticizers.
Inventors
- 👤 Francois De Taffin
- 👤 Jacques Plazanet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:06
CPC Classifications
C; C09; C09D; C09D101/00; C09D101/08; C09D101/16; C09D101/18; C09D175/00; C09D175/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
55 words
A polyurethane lacquer comprising a polyurethane and a particulate nitrocellulose composition which consists essentially of nitrocellulose and from 10 to 30% by weight, based on the weight of nitrocellulose, of a hydroxylic plasticizer containing at least one free hydroxyl group, said plasticizer being a lower alkyl ester of lactic acid, tartaric acid or citric acid.
Claim 2
Dependent Claim
55 words
A polyurethane lacquer comprising a polyurethane and a particulate nitrocellulose composition which consists essentially of nitrocellulose and from 10 to 30% by weight, based on the weight of nitrocellulose, of a hydroxylic plasticizer containing at least one free hydroxyl group, said plasticizer being a lower alkyl ester of lactic acid, tartaric acid or citric acid.
Claim 3
Dependent Claim
21 words
The lacquer according to claim 1 in which the hydroxylic plasticizer is butyl lactate, di-butyl tartrate, tri-butyl citrate or butyl tartrate.
Claim 4
Independent Claim
74 words
The method of improving the gloss, resistance to solvents and to abrasion and resistance to migration of a polyurethane lacquer which comprises incorporating into said lacquer a particulate nitrocellulose composition which consists essentially of nitrocellulose and from 10 to 30% by weight based on the weight of nitrocellulose, of a hydroxylic plasticizer containing at least one free hydroxyl group, said plasticizer being a lower alkyl ester of lactic acid, tartaric acid or citric acid.
Claim 5
Independent Claim
74 words
The method of improving the gloss, resistance to solvents and to abrasion and resistance to migration of a polyurethane lacquer which comprises incorporating into said lacquer a particulate nitrocellulose composition which consists essentially of nitrocellulose and from 10 to 30% by weight based on the weight of nitrocellulose, of a hydroxylic plasticizer containing at least one free hydroxyl group, said plasticizer being a lower alkyl ester of lactic acid, tartaric acid or citric acid.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-12 | 1980-04-12 | 1980-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-12 | 1984-04-12 | 1984-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-12 | 1988-04-12 | 1988-10-12 | $7700.00 | Window Closed / Lapsed |