A two-component polyurea compositions including a polyisocyanate component and a hardener component. The hardener component includes at least a derivative of aspartic acid and at least one salt hydrate with a decomposition temperature of between 30° C. and 150° C. This composition allows to be applied to a large area and/or thick layers or high volume casts and shows fast curing triggered by heat but long pot life at application temperature.

A two-component polyurea compositions including a polyisocyanate component and a hardener component. The hardener component includes at least a derivative of aspartic acid and at least one salt hydrate with a decomposition temperature of between 30° C. and 150° C. This composition allows to be applied to a large area and/or thick layers or high volume casts and shows fast curing triggered by heat but long pot life at application temperature.

Described herein are melt-extrudable biodegradable inks for 3D-printing, methods of using the inks, and kits including the inks, to prepare implantable grafts, such as artificial tympanic membrane devices or artificial cartilage, nerve conduit, tendon, muscle tissue, or bone devices.

Described herein are melt-extrudable biodegradable inks for 3D-printing, methods of using the inks, and kits including the inks, to prepare implantable grafts, such as artificial tympanic membrane devices or artificial cartilage, nerve conduit, tendon, muscle tissue, or bone devices.

Disclosed is an eco-friendly adhesive coating agent composition having high adhesion properties and fast-curing properties by using a thiol-modified epoxy intermediate. The composition includes: a main material including 25 to 40 parts by weight of polyoxypropyleneamine, 20 to 30 parts by weight of a cross-linking agent, 10 to 30 parts by weight of the thiol-modified epoxy intermediate, 10 to 20 parts by weight of an inorganic filler, 5 to 10 parts by weight of a pigment, and 2 to 5 parts by weight of an additive; and a curing agent including 60 to 80 parts by weight of a rubber-modified epoxy resin, 20 to 40 parts by weight of a polyol, 10 to 30 parts by weight of the thiol-modified epoxy intermediate, and 4 to 10 parts by weight of an additive, with respect to 100 parts by weight of an isocyanate mixture.

Disclosed is an eco-friendly adhesive coating agent composition having high adhesion properties and fast-curing properties by using a thiol-modified epoxy intermediate. The composition includes: a main material including 25 to 40 parts by weight of polyoxypropyleneamine, 20 to 30 parts by weight of a cross-linking agent, 10 to 30 parts by weight of the thiol-modified epoxy intermediate, 10 to 20 parts by weight of an inorganic filler, 5 to 10 parts by weight of a pigment, and 2 to 5 parts by weight of an additive; and a curing agent including 60 to 80 parts by weight of a rubber-modified epoxy resin, 20 to 40 parts by weight of a polyol, 10 to 30 parts by weight of the thiol-modified epoxy intermediate, and 4 to 10 parts by weight of an additive, with respect to 100 parts by weight of an isocyanate mixture.

An amino silicone oil-modified elastomer material includes Component A and Component R. Component A includes isocyanate prepolymer obtained through reaction of polyol and isocyanate, and the isocyanate prepolymer has a —NCO content of 22-30%; Component R includes the following components in parts by weight: 45-60 parts of polyether amine, 1-6 parts of liquid amine chain extender, 1-10 parts of polysulfide rubber, 2-8 parts of nano silica, and 3-8 parts of amino silicone oil. The elastomer material of the invention ensures the elasticity of the polymer while improving mechanical properties. Moreover, it can improve elongation, wear resistance and water resistance of the polyurea material.

An amino silicone oil-modified elastomer material includes Component A and Component R. Component A includes isocyanate prepolymer obtained through reaction of polyol and isocyanate, and the isocyanate prepolymer has a —NCO content of 22-30%; Component R includes the following components in parts by weight: 45-60 parts of polyether amine, 1-6 parts of liquid amine chain extender, 1-10 parts of polysulfide rubber, 2-8 parts of nano silica, and 3-8 parts of amino silicone oil. The elastomer material of the invention ensures the elasticity of the polymer while improving mechanical properties. Moreover, it can improve elongation, wear resistance and water resistance of the polyurea material.

An amino silicone oil-modified elastomer material includes Component A and Component R. Component A includes isocyanate prepolymer obtained through reaction of polyol and isocyanate, and the isocyanate prepolymer has a —NCO content of 22-30%; Component R includes the following components in parts by weight: 45-60 parts of polyether amine, 1-6 parts of liquid amine chain extender, 1-10 parts of polysulfide rubber, 2-8 parts of nano silica, and 3-8 parts of amino silicone oil. The elastomer material of the invention ensures the elasticity of the polymer while improving mechanical properties. Moreover, it can improve elongation, wear resistance and water resistance of the polyurea material.

The presently claimed invention is directed to a polyurea-polyetheramine copolymer obtained by reacting at least one polyisocyanate (A) and at least one isocyanate reactive component (B); wherein the at least one polyisocyanate (A) has an NCO functionality of at least ≥2.0; and the at least one isocyanate reactive component (B) is a polyetheramine having at least two secondary amine functional groups and at least one hydroxy functional group.