EP0273775A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Protected optical brighteners
Assignee: Solvay Solutions UK Ltd
•
Filing: 1987-12-31
•
Granted: —
•
Expires: 2007-12-31
Abstract
Abstract Protected additives for use in cleaning compositions such as liquid laundry detergents comprises an optical brightener, bleach, photoactive bleach, perfume, blueing agent or dye dispersed in, or coated with, a hydrophobic substance such as silicone oil or a hydrocarbon, which is insoluble in concentrated liquid detergent but which is disrupted under normal cleaning conditions.
Inventors
- 👤 Edward Tunstall Messenger
- 👤 Anthony Martin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 23:16
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3947; C11D17/00; C11D17/0039; C11D3/0005; C11D3/0063; C11D3/40; C11D3/42; C11D3/50; C11D3/502; C11D3/505
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
66 words
A protected system suitable for use in cleaning compositions, comprising at least one compound selected from optical brightening agents, bleaches, photoactive bleaches, blueing agents, perfumes and dyes dispersed in, or coated with, a hydrophobic protective substance which is insoluble in concentrated liquid detergent but dispersible therein as particles or droplets, and which is sufficiently fluid or friable at wash temperature to be disrupted under cleaning conditions.
Claim 2
Dependent Claim
66 words
A protected system suitable for use in cleaning compositions, comprising at least one compound selected from optical brightening agents, bleaches, photoactive bleaches, blueing agents, perfumes and dyes dispersed in, or coated with, a hydrophobic protective substance which is insoluble in concentrated liquid detergent but dispersible therein as particles or droplets, and which is sufficiently fluid or friable at wash temperature to be disrupted under cleaning conditions.
Claim 3
Dependent Claim
19 words
A protected system according to claim 1, comprising granules, wherein said compound is encapsulated within said hydrophobic protective substance.
Claim 4
Dependent Claim
31 words
A system according to claim 1, comprising a dispersion of said compound in a hydrophobic substance which is insoluble in liquid detergent at room temperature and which is liquid at 60°C.
Claim 5
Dependent Claim
20 words
A system according to claim 1, wherein said hydrophobic protective substance is a polymer which is liquid at room temperatures.
Claim 6
Dependent Claim
15 words
A system according to claim 4, wherein said hydrophobic protective substance is an organopolysiloxane oil.
Claim 7
Independent Claim
18 words
A system according to any of claims 1 to 3, wherein said hydrophobic protective substance is a hydrocarbon.
Claim 8
Independent Claim
14 words
A system according to any foregoing claim, wherein said compound is a fluorescent dye.
Claim 9
Independent Claim
17 words
A system according to any of claims 1 to 6, wherein said compound is an oxidising bleach.
Claim 10
Independent Claim
17 words
A system according to any of claims 1 to 6, wherein said compound is a photoactive bleach.
Claim 11
Dependent Claim
15 words
A system according to claim 8, wherein said oxidising bleach is a peroxy carboxylic acid.
Claim 12
Independent Claim
24 words
A system according to any foregoing claim, comprising droplets of a solution of said compound in a solvent dispersed in a liquid hydrophobic substance.
Claim 13
Independent Claim
25 words
A system according to any of claims 1 to 10, comprising a water-soluble granule or marume dispersed in, or coated with, a silicone or hydrocarbon.
Claim 14
Dependent Claim
15 words
A liquid detergent composition having dispersed therein a protected system according to any foregoing claim.
Claim 15
Dependent Claim
15 words
A detergent powder comprising a protected system according to any of claims 1 to 12.
Claim 16
Dependent Claim
11 words
A detergent powder containing a protected system according to claim 12.
Claim 17
Dependent Claim
18 words
A detergent composition according to any of claims 13 to 15, containing two or more different protected systems.
Claim 18
Dependent Claim
15 words
A composition according to claim 16 containing a protected fluorescent dye and a protected bleach.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.