Foam compositions and articles including cyclodextrin crosslinked with polyurethane prepolymer and preparation thereof

摘要

An odor-absorbing foam composition comprising a cyclodextrin crosslinked with a polyurethane prepolymer. In one embodiment, the foam includes a ratio of the cyclodextrin to the polyurethane prepolymer selected to result in formation of the foam. The odor-absorbing foam may be used in a personal care product or wound care. A process for preparing a foam, including providing a cyclodextrin; providing a polyurethane prepolymer; combining the cyclodextrin with the polyurethane prepolymer; and allowing the polyurethane prepolymer to react with water and crosslink the cyclodextrin to form the foam. A process for preparing an odor-absorbing foam article such as a personal care product, including preparing the foam and applying it or the components thereof to a suitable substrate.

主权项

1. A process comprising:
providing a cyclodextrin with at least one isocyanate-reactive group on at least a portion of the cyclodextrin; providing a polyurethane prepolymer; providing water; combining the cyclodextrin, the water and the polyurethane prepolymer; and reacting the polyurethane prepolymer with the water and the cyclodextrin to form a foam composition comprising the cyclodextrin crosslinked with the polyurethane prepolymer and having a foam structure, wherein the cyclodextrin crosslinked with a polyurethane prepolymer comprises a reaction product of a reactive isocyanate moiety reacted with at least one isocyanate-reactive group on at least a portion of the cyclodextrin, and the isocyanate-reactive group is an active hydrogen on a modifying group attached to the at least a portion of the cyclodextrin wherein the content of the water in the composition is in the range from 10 wt. % to 80 wt based on the composition, prior to the crosslinking, foaming and drying steps; and wherein the content of the cyclodextrin in the composition is from 0.5 wt % to 50 wt % based on the composition, prior to the crosslinking, foaming and drying steps.