Compositions containing perfume
AssigneeQuest International B.V.
InventorsJeremy Nicholas Ness, Pamela Virginia Irving, Marcus James Goodall
Life of this patent
Estimating the term…
Abstract
Perfume is absorbed within organic polymer particles which have a further polymer at their exterior. The further polymer incorporates free hydroxyl groups and serves to promote deposition of the particles from a wash or rinse liquor. The further polymer may be part of an encapsulating shell, but more conveniently is used as a stabilizer during polymerization of the particles. Highly hydrolyzed polyvinyl alcohol is preferred.
Claims25
A perfumed product comprising a mixture of (1) an active ingredient selected from the group consisting of a detergent, a fabric softening agent and a hair-conditioning agent, and (2) solid particles which are insoluble in water, said particles comprising an organic polymer core which has perfume absorbed therein and having at the exterior of the core a hydroxy functional polymer attached to the core so as to form a shell at least partially about said core, said shell being permeable to perfume and said hydroxy functional polymer not being removed from the core in water, said hydroxy functional polymer incorporating free hydroxy groups and being present in a quantity which is no more than 25% of the weight of the particles.
A perfumed product comprising a physical mixture of (1) an active ingredient selected from the group consisting of a detergent, a fabric softening agent and a hair-conditioning agent, and (2) solid particles which are insoluble in water, said particles comprising an organic polymer core which has perfume absorbed therein and having at the exterior of the core a hydroxy functional polymer attached to the core so as to form a shell at least partially about the core, said shell being permeable to perfume, said hydroxy functional polymer not being removed from the core in water, said hydroxy functional polymer being a homopolymer or copolymer of vinyl alcohol incorporating free hydroxy groups and being present in a quantity which is no more than 25% of the weight of the particles.
Dependencies are inferred from the claim text.