摘要:
An aqueous ink for ink jet recording contains a pigment and a urethane resin. The urethane resin includes units respectively derived from a polyisocyanate, a polyol and a tri- or more functional polyamine and has a rate (mol%) of the urea bond based on the tri- or more functional polyamine accounting for the total of the urethane bond and the urea bond in the urethane resin of 20 mol% or less and a proportion of the number of urethane bonds to the theoretical molecular weight of the molecular chain constituted of the units respectively derived from the polyisocyanate and the polyol of 40 micromoles or more to 60 micromoles or less.
摘要:
An aqueous polyurethane resin having a Si atom content of 0.05 to 1.5% by weight in a polyurethane resin is produced by at least reacting an isocyanate group-terminated prepolymer which contains 1 to 15% by weight of a polyoxyethylene group in a side chain branched from the main chain and has two or more isocyanate groups at an end of the main chain, with a chain extender which contains at least a compound having two or more active hydrogen groups reactive with the isocyanate group and an alkoxysilyl group.
摘要:
Disclosed is an aqueous composition for surface coating, including: a main ingredient comprising a first compound having at least two functional groups selected from the group consisting of a carboxyl group, a hydroxyl group, an amino group and combinations thereof, per molecule; a curing agent comprising a second compound having at least two functional groups selected from the group consisting of an aziridine group, an isocyanate group, a carbodiimide group and combinations thereof, per molecule; and an aqueous solvent. Further, an automotive sheet using the aqueous composition for surface coating is disclosed.
摘要:
The invention relates to a specific polyurethane prepolymer (PP2) comprising at least two (2-oxo-l,3-dioxolan-4-yl)methyl-carbamate end groups of low viscosity, to the method for the production thereof, and to the use of same in the production of an adhesive composition. The invention also relates to a multi-component system comprising, as a first component (A), a composition comprising at least one such polyurethane prepolymer, and as a second component (B), a composition comprising at least one hardener having at least two primary amine groups (-NH2) (Bl). The invention further relates to a method for assembling materials, using the polyurethane polymer (PP2) according to the invention.
摘要:
The invention relates to an isocyanate-containing prepolymer obtainable by reacting at least one isocyanate which comprises methylene diphenyl diisocyanate with at least one first compound selected from the group comprising monohydric alcohols, thiols and secondary amines and with at least one second compound selected from the group comprising monohydric alcohols, thiols and secondary amines.
摘要:
The invention relates to a process to manufacture an adhesive layer in an easy to handle process, whereby the adhesive is applied in a molten state to a substrate in an amount to form a layer of 150 to 5000 µm and the adhesive is cured by UV-radiation whereby the adhesive comprises a polyurethane bearing at least one unsaturated curable group in the chain and the radiation source is preferably an UV-LED.