Perfume encapsulates

• US 7,238,655 B2
• Filed: 03/13/2002
• Issued: 07/03/2007
• Est. Priority Date: 03/16/2001
• Status: Expired due to Term

• Current Assignee: Quest International B.V.. (Givaudan SA)
• Original Assignee: Quest International Services B.V.
• Inventors: Ness, Jeremy Nicholas
• Primary Examiner(s): Warden; Jill
• Assistant Examiner(s): Siefke; Samuel P.
• Application Number:
  US10/471,611
• Publication Number:
  US 20040087477A1
• Time in Patent Office: 1,938 Days
• Field of Search: 424/451, 424/455, 424/489, 424/490, 512/4, 510/523
• US Class Current: 512/4
• CPC Class Codes: B01J 13/18 In situ polymerisation with all reactants being present in the same phase
• CPC Class Codes: C11D 3/505 encapsulated or adsorbed on a carrier, e.g. zeolite or clay

Abstract

A perfume encapsulate comprises an aminoplast capsule, the capsule shell comprising urea-formaldehyde or melamine-formaldehyde polymer and a second polymer comprising a polymer or copolymer of one or more anhydrides, preferably ethylene/maleic anhydride copolymer. The second polymer improves the stability of the capsules with respect to surfactant, thus improving perfume retention properties and enabling use of the capsules in aqueous surfactant-containing products in a way that has not hitherto been possible.

Claims

1. An aqueous surfactant-containing product comprising perfume encapsulates having a shell with perfume encapsulated therein, said capsule shell comprising melamine-formaldehyde polymer and a second polymer comprising a polymer or copolymer of one or more anhydrides, said second polymer improving the perfume retention properties of said shell.

2. An aqueous surfactant-containing product according to claim 1, wherein the second polymer comprises a polymer or copolymer of one or more cyclic anhydrides.

3. An aqueous surfactant-containing product according to claim 2, wherein the second polymer comprises maleic anhydride.

4. An aqueous surfactant-containing product according to claim 3, wherein the second polymer comprises ethylene/maleic anhydride copolymer.

5. A product according to claim 1, selected from the group consisting of shampoos and hair conditioners, shower gels and body washes, laundry detergent liquids, fabric rinse conditioners, household cleaners and bleaches, toilet cleaners and bleaches, and bar toilet soap.

6. In an aqueous surfactant-containing product which includes perfume encapsulates having a shell comprising a melamine-formaldehyde polymer encapsulating the perfume, the improvement wherein the shell comprises melamine-formaldehyde polymer and ethylene/maleic anhydride copolymer, thereby improving the perfume retention properties of said encapsulate.