Disclosed are a soft solvent-free flame-retardant polyurethane synthetic leather and a preparation method therefor. The soft solvent-free flame-retardant polyurethane synthetic leather comprises an antifouling layer, a surface layer, an intermediate layer, a bonding layer and a base cloth in sequence from top to bottom, wherein the bonding layer is prepared from component A and an isocyanate; the molar ratio of —NCO in the isocyanate to —OH in the component A is 0.85-0.93; and the component A is composed of a polyhydric alcohol, an inhibition-type catalyst, a flame retardant, a filler and a viscosity modifier in parts by weight.

Disclosed are a soft solvent-free flame-retardant polyurethane synthetic leather and a preparation method therefor. The soft solvent-free flame-retardant polyurethane synthetic leather comprises an antifouling layer, a surface layer, an intermediate layer, a bonding layer and a base cloth in sequence from top to bottom, wherein the bonding layer is prepared from component A and an isocyanate; the molar ratio of —NCO in the isocyanate to —OH in the component A is 0.85-0.93; and the component A is composed of a polyhydric alcohol, an inhibition-type catalyst, a flame retardant, a filler and a viscosity modifier in parts by weight. The polyurethane synthetic leather prepared by the present invention has daily life antifouling properties, a good durability, is soft to the touch, is strongly skin-friendly, and has a very superior flame-retardant performance, and also has excellent antifouling, scratch resistance and flexure resistance properties; the production process is simple, efficient and environmentally friendly and same can satisfy market demands.

Disclosed are a soft solvent-free flame-retardant polyurethane synthetic leather and a preparation method therefor. The soft solvent-free flame-retardant polyurethane synthetic leather comprises an antifouling layer, a surface layer, an intermediate layer, a bonding layer and a base cloth in sequence from top to bottom, wherein the bonding layer is prepared from component A and an isocyanate; the molar ratio of —NCO in the isocyanate to —OH in the component A is 0.85-0.93; and the component A is composed of a polyhydric alcohol, an inhibition-type catalyst, a flame retardant, a filler and a viscosity modifier in parts by weight.

Disclosed are a soft solvent-free flame-retardant polyurethane synthetic leather and a preparation method therefor. The soft solvent-free flame-retardant polyurethane synthetic leather comprises an antifouling layer, a surface layer, an intermediate layer, a bonding layer and a base cloth in sequence from top to bottom, wherein the bonding layer is prepared from component A and an isocyanate; the molar ratio of —NCO in the isocyanate to —OH in the component A is 0.85-0.93; and the component A is composed of a polyhydric alcohol, an inhibition-type catalyst, a flame retardant, a filler and a viscosity modifier in parts by weight. The polyurethane synthetic leather prepared by the present invention has daily life antifouling properties, a good durability, is soft to the touch, is strongly skin-friendly, and has a very superior flame-retardant performance, and also has excellent antifouling, scratch resistance and flexure resistance properties; the production process is simple, efficient and environmentally friendly and same can satisfy market demands.

New shape memory polymer compositions, methods for synthesizing new shape memory polymers, and apparatus comprising an actuator and a shape memory polymer wherein the shape memory polymer comprises at least a portion of the actuator. A shape memory polymer comprising a polymer composition which physically forms a network structure wherein the polymer composition has shape-memory behavior and can be formed into a permanent primary shape, re-formed into a stable secondary shape, and controllably actuated to recover the permanent primary shape. Polymers have optimal aliphatic network structures due to minimization of dangling chains by using monomers that are symmetrical and that have matching amine and hydroxl groups providing polymers and polymer foams with clarity, tight (narrow temperature range) single transitions, and high shape recovery and recovery force that are especially useful for implanting in the human body.

The present technology provides a curable resin composition that contains a urethane prepolymer having an isocyanate group, a coated amine formed by using a filler to coat solid amine having a melting point of 50° C. or higher, an isocyanate group-containing compound having an isocyanate group bonded to an aliphatic hydrocarbon group and having a hydrolyzable silyl group or (meth)acryloyl group, and a tertiary amine compound.

The present technology provides a curable resin composition that contains a urethane prepolymer having an isocyanate group, a coated amine formed by using a filler to coat solid amine having a melting point of 50° C. or higher, an isocyanate group-containing compound having an isocyanate group bonded to an aliphatic hydrocarbon group and having a hydrolyzable silyl group or (meth)acryloyl group, and a tertiary amine compound.

Polymers are disclosed that incorporate portions of secondary or tertiary polyamide segments connected with polyisocyanates. These polymers have enhanced matting properties. The enhanced matting properties are from creating an inherently matt surface from the polymer without the use of any separate fine particle size matting additives. Conventional matting agents such as fine particle size silica usually results in loss of physical properties such as haze development and porosity in the coating from the matting agent. Composites and hybrids of these polymers and other polyamides, polyurethane with vinyl polymers (acrylates) are also disclosed and claimed.

Polymers are disclosed that incorporate portions of secondary or tertiary polyamide segments connected with polyisocyanates. These polymers have enhanced matting properties. The enhanced matting properties are from creating an inherently matt surface from the polymer without the use of any separate fine particle size matting additives. Conventional matting agents such as fine particle size silica usually results in loss of physical properties such as haze development and porosity in the coating from the matting agent. Composites and hybrids of these polymers and other polyamides, polyurethane with vinyl polymers (acrylates) are also disclosed and claimed.

A photocurable composition is provided. The photocurable composition includes: a urethane acrylamide oligomer derived from a first urethane prepolymer having an isocyanate end group and a polar group-containing acrylamide; a urethane acrylate oligomer derived from a second urethane prepolymer having an isocyanate end group and a polar group-containing (meth)acrylate; and an amide group-containing acrylic polymer derived from acrylamide and a polar group-containing (meth)acrylate.

A photocurable composition is provided. The photocurable composition includes: a urethane acrylamide oligomer derived from a first urethane prepolymer having an isocyanate end group and a polar group-containing acrylamide; a urethane acrylate oligomer derived from a second urethane prepolymer having an isocyanate end group and a polar group-containing (meth)acrylate; and an amide group-containing acrylic polymer derived from acrylamide and a polar group-containing (meth)acrylate.

Embodiments of the invention provide compositions useful in analyte sensors as well as methods for making and using such compositions and sensors. In typical embodiments of the invention, the sensor is a glucose sensor comprising an analyte modulating membrane formed from a polymeric reaction mixture formed to include limiting amounts of catalyst and/or polycarbonate compounds so as to provide such membranes with improved material properties such as enhanced thermal and hydrolytic stability.