摘要:
The application describes macromonomers and carboxyl functional polyurethanes having a high carboxyl content. The application further describes dispersions, coatings and magnetic recording media comprising these polyurethanes, or blends or copolymers of these polyurethanes with quaternary ammonium polymers or compounds.
摘要:
A process for regulating the water retention of soil materials used in agriculture involving providing a composition comprising a polymer selected from the group consisting of a urethane, a urethaneurea, a thiocarbamate and mixtures thereof, said polymer comprising hydrophobic and hydrophilic segments; and applying the composition onto soil materials used in agriculture to form a polymer film thereon, wherein the hydrophobic and hydrophilic segments together provide reversible hydrophobic-hydrophilic switching in response to water, such that the film surface switches from a relatively hydrophobic state in dry conditions to a relatively hydrophilic state in response to the presence of water in contact with the film surface.
摘要:
A polyurethane material, the coatings prepared therefrom, and methods of making the same are provided. A polyurethane material may be formed from components comprising at least one polyisocyanate, at least one active hydrogen-containing material, at least one material having at least one primary or secondary amino group and at least one hydroxyl group, and at least one acid functional material or anhydride having a functional group reactive with isocyanate or hydroxyl groups of other components from which the polyurethane material is formed. The polyurethane can provide improved physical properties, such as chip resistance, when incorporated into a coating composition.
摘要:
To provide a cosmetic resin composition for preparation of a hair fixative having all properties of stiffness, shampoo removability, combability and anti-flaking property. A cosmetic resin composition consisting essentially of an amphoteric urethane resin having a carboxyl group and a tertiary amino group in one molecule thereof, the amphoteric urethane resin having a structural unit derived from an ethylene oxide in its structure.
摘要:
A polyurethane reaction product of a di- or polyisocyanate and a diol or polyol having at least two hydroxyl groups capable of reacting with an isocyanate group and having the residue of at least one further hydroxyl group present in the form of a phosphorus acid ester group of formula (I), wherein n is 0 or 1, m is 2, 3, or 4 and each R independently is an alkyl group of 1 to 4 carbons optionally with a diol or polyol which does not contain a group of formula I is useful in biocompatible, particularly haemocompatible devices for use in methods of medical treatment.
摘要:
The present invention relates to a dispersion comprising (A) a carrier fluid in an amount from 35 to 95 wt.%, the carrier fluid comprising: (A1) water, and (A2) at least one compound selected from the group consisting of ethanol, 1-propanol, 2-propanol, ethyl acetate, n-propyl acetate, isopropyl acetate, acetone, methyl ethyl ketone and any mixture of at least two of these compounds, whereby the amount of water (A1) relative to the carrier fluid (A) is less than 85 wt.% and the amount of water relative to the dispersion is from 1 to 30 wt.%; and (B) polymer(s) in an amount from 5 to 65 wt.%, the polymer(s) comprising: (B1) polymeric particles having a volume average particle size from 1μm to 20μm, whereby the polymer of the polymeric particles (B1) has a weight average molecular weight of at least 100 kDaltons and whereby the polymer of the polymeric particles (B1) is selected from the group consisting of polyurethane, polyurethane-polyacrylate hybrid and any mixture thereof; and whereby the amounts of (A) and (B) are given relative to the total amount of (A) and (B).
摘要:
Electro-optic assemblies and related materials (e.g., adhesive) for use therein are generally provided. The adhesive layer may comprise an end-capped polyurethane. Some adhesive layers comprise two or more reactive functional groups (e.g., reactive functional groups configured to react with one or more curing species such that, for example, at least one of the two or more functional groups forms a crosslink). The adhesive may also comprise a chain-extending reagent that includes one or more reactive functional groups. In some embodiments, the adhesive is cured by reacting one or more reactive functional groups with one or more curing species. Curing the adhesive may comprise two or more curing steps. In some embodiments the adhesive layer may comprise one or more cross-linkers.