US4409379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymerization process initiated with bis (4-tert. butyl cyclohexyl) peroxydicarbonate and aerosol hair lacquer containing the copolymer so produced
Assignee: L'Oréal SA
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Filing: 1981-07-29
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Granted: 1983-10-11
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Expires: 2001-07-29
Abstract
Abstract Vinyl acetate and an unsaturated acid are copolymerized in the presence of bis (4-tert. butyl cyclohexyl) peroxydicarbonate. The resulting copolymer which exhibits improved aerosol propellant solubility characteristics is employed in aerosol hair lacquer compositions.
Inventors
- 👤 Quintino Gaetani
- 👤 Bernard Jacquet
- 👤 Claude Mahieu
- 👤 Christos Papantoniou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:58
CPC Classifications
C; C08; C08F; C08F218/00; C08F218/02; C08F218/04; C08F218/08; A; A61; A61K; A61K8/00; A61K8/02; A61K8/04; A61K8/046; A61K8/18; A61K8/72; A61K8/81; A61K8/8141; A61K8/8147; A61Q; A61Q5/00; A61Q5/06; A61K2800/00; A61K2800/40; A61K2800/54; A61K2800/542; A61K2800/5424
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
43 words
A process for preparing a copolymer useful in cosmetics, in particular, for the production of aerosol hair lacquer compositions, comprising copolymerizing in the presence of bis(4-tert. butyl cyclohexyl)peroxydicarbonate, as the polymerization initiator, 85-95 weight percent vinyl acetate and 5-15 weight percent crotonic acid.
Claim 2
Dependent Claim
43 words
A process for preparing a copolymer useful in cosmetics, in particular, for the production of aerosol hair lacquer compositions, comprising copolymerizing in the presence of bis(4-tert. butyl cyclohexyl)peroxydicarbonate, as the polymerization initiator, 85-95 weight percent vinyl acetate and 5-15 weight percent crotonic acid.
Claim 3
Dependent Claim
27 words
The process of claim 1 wherein the copolymerization is carried out in mass, in suspension in an inert solvent, in solution in a solvent or in emulsion.
Claim 4
Dependent Claim
30 words
The process of claim 1 wherein the copolymerization is carried out in suspension in water in the presence of a protective colloid, the resulting copolymer being obtained in pearl form.
Claim 5
Dependent Claim
29 words
The process of claim 1 wherein said bis(4-tert. butyl cyclohexyl)peroxydicarbonate is employed in an amount of 0.5-5 weight percent based on the total weight of the monomers being reacted.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein the polymerization is carried out at a temperature between 40° and 100° C.
Claim 7
Dependent Claim
19 words
The process of claim 1 wherein the polymerization is carried out at the reflux temperature of the reaction mixture.
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) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |