Perfume encapsulates

Details Perfume encapsulates Perfume encapsulates

2007-07-03

2007-07-03

Warden, Jill (Department: 1743)

Perfume compositions

Perfume compositions

Nonliquid or encapsulated

C424S451000, C510S523000

Reexamination Certificate

active

10471611

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.

REFERENCES:
patent: 4062799 (1977-12-01), Matsukawa et al.
patent: 4100103 (1978-07-01), Foris et al.
patent: 4251386 (1981-02-01), Saeki et al.
patent: 5043161 (1991-08-01), Scarpelli et al.
patent: 5180637 (1993-01-01), Sumii
patent: 0 364 922 (1990-04-01), None

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