DELAYED RELEASE DELIVERY SYSTEMS AND METHODS

A delayed release delivery system comprises a hydrophilic core particle having surface pores and containing a liquid. The particle is encapsulated in a polymer having a hydrophobic backbone and hydrophilic pendant groups. At least some of the surface pores adjacent the hydrophilic pendant groups are...

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creator LEE, Wilson A. (dr.)
description A delayed release delivery system comprises a hydrophilic core particle having surface pores and containing a liquid. The particle is encapsulated in a polymer having a hydrophobic backbone and hydrophilic pendant groups. At least some of the surface pores adjacent the hydrophilic pendant groups are blocked in the presence of water and unblocked in the absence of water. The treated particle contains liquid in a weight ratio of the liquid to the porous core particle of at least 400:1.
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language eng ; fre ; ger
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subjects ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES
CANDLES
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
DETERGENT COMPOSITIONS
DETERGENTS
FATTY ACIDS THEREFROM
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
RECOVERY OF GLYCEROL
RESIN SOAPS
SOAP OR SOAP-MAKING
SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS
THEIR RELEVANT APPARATUS
TRANSPORTING
USE OF SINGLE SUBSTANCES AS DETERGENTS
title DELAYED RELEASE DELIVERY SYSTEMS AND METHODS
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