US4685931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylate dispersion and its use for thickening hydrogen peroxide preparations
Assignee: Henkel AG and Co KGaA
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Filing: 1985-12-13
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Granted: 1987-08-11
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Expires: 2005-12-13
Abstract
Abstract An aqueous dispersion of a copolymer of from about 50 to 60% by weight ethyl acrylate from about 30 to 40% by weight methacrylic acid from about 5 to 15% by weight acrylic acid and from about 0.02 to 0.04% by weight of a polyethylenically copolymerizable monomer, for example ethylene glycol dimethacrylate. The dispersion is suitable as an additive for aqueous, mildly acidic preparations of hydrogen peroxide to impart an increased viscosity to them after neutralization. The hydrogen peroxide preparations in question are particularly suitable for use as a developer composition for oxidative hair dyes and hair bleaches.
Inventors
- 👤 Ludwig Schieferstein
- 👤 Detlef Hollenberg
- 👤 Norbert Maak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:08
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/81; A61K8/8141; A61K8/8152; A61Q; A61Q5/00; A61Q5/08; A61Q5/10; C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1802
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
83 words
An aqueous dispersion having a solids content of from about 5 to 30% by weight of a copolymer of ethyl acrylate, methacrylic acid, acrylic acid and as a crosslinking agent a polyethylenically unsaturated monomer, said copolymer consisting essentially of from about 50 to 60% by weibht of ethyl acrylate from about 30 to 40% by weight of methacrylic acid from about 5 to 15% by weight of acrylic acid and from about 0.02 to 0.04% by weight of said polyethylenically unsaturated copolymerizable monomer.
Claim 2
Dependent Claim
83 words
An aqueous dispersion having a solids content of from about 5 to 30% by weight of a copolymer of ethyl acrylate, methacrylic acid, acrylic acid and as a crosslinking agent a polyethylenically unsaturated monomer, said copolymer consisting essentially of from about 50 to 60% by weibht of ethyl acrylate from about 30 to 40% by weight of methacrylic acid from about 5 to 15% by weight of acrylic acid and from about 0.02 to 0.04% by weight of said polyethylenically unsaturated copolymerizable monomer.
Claim 3
Dependent Claim
29 words
The aqueous dispersion of claim 1, wherein the polyethylenically unsaturated monomer contains at least two non-conjugated points of ethylenic unsaturation or at least two non-conjugated CH 2 ═C═ groups.
Claim 4
Dependent Claim
15 words
The aqueous dispersion of claim 1, wherein the monomer is either diethylenically or triethylenically unsaturated.
Claim 5
Dependent Claim
12 words
The aqueous dispersion of claim 3, wherein the monomer is diethylenically unsaturated.
Claim 6
Dependent Claim
30 words
The aqueous dispersion of claim 1 wherein said polyethylenically unsaturated monomer is selected from the group consisting of ethylene glycol dimethacrylate; trimethylolpropane trimethacrylate; polyethylene glycol dimethacrylate; 2-ethylhexane-1,3-dimethacrylate and allyl methacrylate.
Claim 7
Dependent Claim
31 words
The aqueous dispersion of claim 1 having a pH within the range of about 2 to 5 and a solids content of about 20 to 30% by weight of said copolymer.
Claim 8
Dependent Claim
49 words
The aqueous dispersion of claim 5 having a solids content of about 5 to 30% by weight of a copolymer consisting essentially of: about 55% by weight ethyl acrylate about 35% by weight methacrylic acid about 10% by weight acrylic acid and about 0.025% by weight ethylene glycol dimethacrylate.
Claim 9
Dependent Claim
19 words
A thickened aqueous composition comprising the aqueous dispersion of claim 1 and sufficient aqueous base to neutralize said copolymer.
Claim 10
Dependent Claim
13 words
The composition of claim 8, wherein the pH is at least about 8.
Claim 11
Dependent Claim
19 words
A thickened aqueous composition comprising the aqueous dispersion of claim 5 and sufficient aqueous base to neutralize said copolymer.
Claim 12
Dependent Claim
25 words
The thickened aqueous composition of claim 8 wherein said base is selected from the group consisting of sodium hydroxide, potassium hydroxide, monoethanolamine, diethanolamine and triethanolamine.
Claim 13
Dependent Claim
25 words
The thickened aqueous compostion of claim 10 wherein said base is selected from the group consisting of sodium hydroxide, potassium hydroxide, monoethanolamine, diethanolamine and triethanolamine.
Claim 14
Dependent Claim
55 words
A hydrogen peroxide preparation for use as a developer dispersion for oxidative hair dyes or for hair bleaches, comprising from about 1 to 20% by weight of hydrogen peroxide and from about 1 to 5% by weight of the copolymer dispersion of claim 1, said preparation having a pH-value of from about 2 to 5.
Claim 15
Dependent Claim
54 words
A hydrogen peroxide preparation for use as a developer dispersion for oxidative hair dyes or for hair bleaches, comprising from about 1 to 20% by weight of hydrogen peroxide and from about 1 to 5% by weight of the copolymer dispersion of claim 7, said preparation having pH-value of from about 2 to 5.
Claim 16
Dependent Claim
28 words
A method of thickening an aqueous medium which comprises adding to said aqueous medium the copolymer dispersion of claim 1 and sufficient aqueous base to neutralize said copolymer.
Claim 17
Dependent Claim
23 words
The method of claim 15 wherein said base is selected from the group consisting of sodium hydroxide, potassium hydroxide, monoethanolamine, diethanolamine and triethanolamine.
Claim 18
Dependent Claim
28 words
A method of thickening an aqueous medium which comprises adding to said aqueous medium the copolymer dispersion of claim 5 and sufficient aqueous base to neutralize said copolymer.
Claim 19
Dependent Claim
23 words
The method of claim 17 wherein said base is selected from the group consisting of sodium hydroxide, potassium hydroxide, monoethanolamine, diethanolamine and triethanolamine.
Claim 20
Dependent Claim
28 words
A method of thickening an aqueous medium which comprises adding to said aqueous medium the copolymer dispersion of claim 6 and sufficient aqueous base to neutralize said copolymer.
Claim 21
Dependent Claim
28 words
A method of thickening an aqueous medium which comprises adding to said aqueous medium the copolymer dispersion of claim 7 and sufficient aqueous base to neutralize said copolymer.
Claim 22
Dependent Claim
23 words
The method of claim 19 wherein said base is selected from the group consisting of sodium hydroxide, potassium hydroxide, monoethanolamine, diethanolamine and triethanolamine.
Claim 23
Dependent Claim
23 words
The method of claim 20 wherein said base is selected from the group consisting of sodium hydroxide, potassium hydroxide, monoethanolamine, diethanolamine and triethanolamine.
Claim 24
Dependent Claim
32 words
A method of preparing an oxidative hair dye or hair bleach comprising blending with an oxidative dye emulsion or bleach emulsion containing an aqueous base the hydrogen peroxide preparation of claim 13.
Claim 25
Dependent Claim
32 words
A method of preparing an oxidative hair dye or hair bleach comprising blending with an oxidative dye emulsion or bleach emulsion containing an aqueous base the hydrogen peroxide preparation of claim 14.
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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) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |