A process for preparing a polymeric membrane for soil materials used in crop production comprising providing an aqueous dispersion of polyurethane and spraying the aqueous dispersion onto soil materials to be used in crop production to form a polymeric membrane.

Curable compositions that include an oligomer with one or more internal urethane linkages and OH groups capped by an Acrylate-End-Capping (AEC) compound. The curable compositions may be made by reacting a polyol with a diisocyanate compound to form a pre-oligomer compound having one or more internal urethane linkages and terminal OH groups. The curable coating compositions may be cured to form a coating for an optical fiber, for example, a primary coating for an optical fiber.

Carbon dioxide-reversibly-protected chain extension-crosslinking agents and a preparation method and use thereof are disclosed, The carbon dioxide-reversibly-protected chain extension-crosslinking agents have chemical structures represented by Formula I, Formula II, Formula III or Formula IV, wherein, n, m and p are integers, R is either OCH.sub.2CH(CH.sub.3) or OCH.sub.2CH.sub.2, 1≤n≤20, 1≤m≤10, and 1≤p≤10. ##STR00001##

A process for preparing a polymeric membrane for soil materials used in crop production comprising providing an aqueous dispersion of polyurethane and spraying the aqueous dispersion onto soil materials to be used in crop production to form a polymeric membrane.

Carbon dioxide-reversibly-protected chain extension-crosslinking agents and a preparation method and use thereof are disclosed, The carbon dioxide-reversibly-protected chain extension-crosslinking agents have chemical structures represented by Formula I, Formula II, Formula III or Formula IV, wherein, n, m and p are integers, R is either OCH.sub.2CH(CH.sub.3) or OCH.sub.2CH.sub.2, 1≤n≤20, 1≤m≤10, and 1≤p≤10.

##STR00001##

Curable compositions that include an oligomer with one or more internal urethane linkages and OH groups capped by an Acrylate-End-Capping (AEC) compound. The curable compositions may be made by reacting a polyol with a diisocyanate compound to form a pre-oligomer compound having one or more internal urethane linkages and terminal OH groups. The curable coating compositions may be cured to form a coating for an optical fiber, for example, a primary coating for an optical fiber.

A process for preparing a polymeric membrane for soil materials used in crop production comprising providing an aqueous dispersion of polyurethane and spraying the aqueous dispersion onto soil materials to be used in crop production to form a polymeric membrane.

The addition of a small amount of an alkyl sulfoxide, e.g., DMSO, to an isocyanate capped prepolymer provides a storage stable prepolymer composition in which the prepolymer is also highly activated towards curing with certain blocked curing agents such as methylenedianiline metal salt coordination complexes. The prepolymer/alkyl sulfoxide compositions are cured by said blocked curing agents at lower temperatures and/or at an accelerated rate compared to similar compositions lacking the alkyl sulfoxide providing high performance polyurethane elastomers.

The present invention provides an aqueous polyurethane dispersion (PUD) comprising an amorphous polyester having a glass transition temperature (T.sub.g) as determined by differential scanning calorimetry of less than 30 C.; wherein the aqueous polyurethane dispersion (PUD) has a glass transition temperature (T.sub.g) as determined by differential scanning calorimetry (DSC) of 0 C. to 20 C. and a hard block content of greater than 50%. Coatings, adhesives, sealants, paints, primers and topcoats, made from the inventive aqueous polyurethane dispersion (PUD) pass detergent resistance testing according to the American Architectural Manufacturers Association's standard, AAMA 615-13, have a pencil hardness according to ASTM D3363 of at least 3H, and are particularly suited for use on low surface energy substrates such as vinyl and other surfaces including floors, windows, doors, window frames, door frames, window shutters, railing, gates, pillars, arbors, pergolas, trellises, gazebos, posts, fencing, pipes and fittings, wire and cable insulation, automobile components, credit cards, and siding.

Methods for killing a microbial are provided that include introducing a functionalized amide polymer to a microbe, where the functionalized amide polymer includes a polymer backbone selected from polyesters and polyurethanes; an amide group with a pendant functional group, where the nitrogen atom of the amide group is part of the polymer backbone; and a net positive charge.