Perfume encapsulates
First Claim
1. A perfume encapsulate comprising 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.
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Accused Products
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.
87 Citations
8 Claims
- 1. A perfume encapsulate comprising 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.
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6. A method of making a perfume encapsulate, comprising forming a dispersion of perfume in an aqueous solution of urea-formaldehyde or melamine-formaldehyde precondensate and a second polymer comprising a polymer or copolymer of one or more anhydrides;
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causing polymerisation of the precondensate to produce perfume-containing aminoplast capsules.
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Specification