The present invention relates to an aqueous polyurethane dispersion and a process for preparing the same, an adhesive containing the same, and an adhesion article obtained by bonding with the adhesive. The aqueous polyurethane dispersion comprises a polyurethane having an anionic group dispersed therein, the polyurethane has a fusion enthalpy of 3 J/g-100 J/g at 20° C.-100° C. of the first temperature rising curve measured with the DSC according to DIN 65467, a weight-average molecular weight of 31,000-95,000, and the aqueous polyurethane dispersion has an acid value of 0.5 mg KOH/g-8.5 mg KOH/g. The adhesive comprising the aqueous polyurethane dispersion of the present invention has an excellent initial bonding force.

A polyurethane elastomer memory foam composition includes an organic diisocyanate, a chain extender, a crosslinker, a plasticizer, a surfactant, a foaming agent, and a polyester resin, the polyester resin being a random copolymer having randomly distributed subunits of formula 1:

##STR00001##

where: R is ethylene, octylene, or decylene; a is from about 1 to about 99 mole % of the polyester resin; b is from about 1 to about 99 mole % of the polyester resin; c is from 0 to about 10 mole % of the polyester resin; and a+b+c=100 mole % of the polyester resin.

The present invention relates to a coating composition, a coating system comprising the coating composition, a coating method and application of the coating system, and a product coated with the coating system. The coating composition comprises: (A) at least one aqueous polyurethane dispersion and/or one aqueous polyacrylate dispersion, wherein the aqueous polyurethane dispersion comprises at least one polyurethane polymer (a), wherein the polyurethane polymer (a) is obtained by a reaction comprising at least one polyurethane prepolymer (a1) and at least one isocyanate-reactive component (a2), wherein the polyurethane prepolymer (a1) is obtained by a reaction comprising the following components: (a1-1) at least one polyisocyanate having an isocyanate functionality of no less than 2, and (a1-2) at least one polyfunctional polyether polyol having a hydroxyl functionality of no less than 3, wherein the polyfunctional polyether polyol has an amount of 1 wt % to 20 wt %, based on the amount of the components for preparing the polyurethane prepolymer being 100 wt %, and (B) at least one crosslinking agent.

It discloses a polyether polyols for preparing flexible polyurethane foam, and a preparation method and application thereof. The method comprises the following steps: (1) carrying out a reaction on phosphorus oxychloride, epichlorohydrin, a first acidic catalyst and an inert solvent in a first microchannel reactor to obtain a chloroalkoxy phosphorus compound; (2) carrying out a reaction on the chloroalkoxy phosphorus compound, glycidol, a second acidic catalyst and an inert solvent in a second microchannel reactor to obtain a hydroxy compound; (3) carrying out a ring-opening reaction on the hydroxy compound, epoxy vegetable oil, a basic catalyst and an inert solvent in a third microchannel reactor to obtain a vegetable oil polyol; and (4) carrying out an addition polymerization reaction on the vegetable oil polyol, propylene oxide and an inert solvent in a fourth microchannel reactor to obtain the polyether polyols for preparing flexible polyurethane foam.

The present disclosure relates to polyurethane comprising a reaction product of a reactive mixture including a polyester polyol, a diol chain extender, a diisocyanate; and a reactive, tertiary amine. The present disclosure further provides polishing layers and polishing pads fabricated therefrom. Additionally, the present disclosure provides polishing systems and polishing methods employing said polishing layers and polishing pads.

A composition comprised of a component selected from the group consisting of a biobased bis-alkyl succinate and a biobased bis-alkyl sebacate, each derived, for example, from the esterification of biobased diacid such as succinic acid or sebacic acid, and a biobased alcohol and a biobased polyester.

A shape memory polymer hydrogel that is biodegradable, includes antimicrobial agents, and has a tunable drug delivery is used for wound healing internally and externally. The shape memory polymer is synthesized using a combination of hydrophilic precursors that are configured to have two to four functional end groups, with at least one component that has at least three functional groups. The synthesis route provides for a covalently crosslinked thermoset hydrogel. The chemistry can be tuned to provide desired transition temperatures for delivery (e.g. below 37° C.) and desired pore sizes for healing (e.g. 250-500 μm).

Provided herein are color protectant compositions for dyed human hair, and methods for determining the same.

A polyurethane elastomer, which can be a foam, generated from (a) an organic diisocyanate, (b) a polyester resin, (c) a chain extender comprised of a polyhydric alcohol, (d) a crosslinker, (e) a plasticizer, (f) a surfactant, (g) a bio-additive, (h) a blowing agent, and (i) an optional dye; and optionally where the elastomer has, for example, a hardness value of, for example, from about 15 Asker C to about 60 Asker C, a tensile strength of from about 1 MPa to about 10 MPa, a resilience of from about 30 percent to about 60 percent, an elongation at break of from about 150 percent to about 700 percent, and a tear strength from about 2 Newtons/millimeters to about 4 Newtons/millimeters, and which elastomers can be selected for footwear.

A self-crosslinkable polyurethane or polyurethane-urea aqueous dispersion, a preparation method therefor, and a use thereof. Side chains of the polyurethane or polyurethane-urea contain non-sterically-hindered siloxy groups. During the drying and activation of the aqueous dispersion, the siloxys in the side chains are hydrolyzed and crosslinked with each other to increase the cross-linking density, significantly improving the heat resistance, the humidity resistance, and other properties of an adhesive obtained therefrom. The aqueous dispersion itself has a good stability. In addition, an application system based thereon has an excellent stability and a long storage time. The aqueous dispersion is suitable for the preparation of high quality paints and sealants, especially adhesives.