A polyisocyanate resin can include from 25 wt % to 50 wt % of a first cycloaliphatic polyisocyanate and from 50 wt % to 75 wt % of a flexibilizing component based on a total weight of the polyisocyanate resin. The first cycloaliphatic polyisocyanate can have an NCO % of from 12 wt % to 20 wt % based on ISO 11909:2007. The flexibilizing component can include a linear aliphatic polyisocyanate having a number average isocyanate functionality of from 2 to 3 based on gel permeation chromatography and an isocyanate-terminated reaction product of a second cycloaliphatic polyisocyanate and an isocyanate-reactive material, the reaction product having a Tg of less than −30° C. based on a Differential Scanning Calorimetry (2.sup.nd Heating) temperature scan from −100° C. to 150° C. using 20° C./min heating and cooling ramps. The isocyanate-terminated reaction product and the linear aliphatic polyisocyanate can be present at a weight ratio of from 0.5 to 2.5.

This invention provides a readily adhesive polyester film that has fewer flaws and in which no appearance defects occur due to tight winding during the storage of rolled products, and a method for efficiently producing the readily adhesive polyester film. More specifically, this invention provides a readily adhesive polyester film comprising a polyester film as a base film and a readily adhesive layer on at least one side of the base film, wherein the base film contains particles with an average particle diameter of 0.1-2 μm or more in an amount of 1 mass % or less based on the mass of the base film, and the readily adhesive layer is a cured product of a composition comprising a copolymerized polyester resin (A), a blocked isocyanate group-containing urethane resin (B), and a silicone surfactant (C). This invention also provides a method for producing a readily adhesive polyester film.

The present invention provides an allophanate polymer system made by a method comprising combining a neutralized polyol with a polyuretdione resin in the presence of a reactive reducer comprising a reducing agent and a tertiary amine catalyst to produce a clear-coat, and contacting the clear-coat with a basecoat comprising a tertiary amine catalyst. The reaction between the polyol and the polyuretdione will proceed after the reactive reducer reduces the viscosity of the one component clear-coat formulation to appropriate levels. The inventive allophanate polymer system is particularly applicable in providing coatings, adhesives, castings, composites, and sealants with good performance.

An alternative polyurethane composition is provided which comprises a reaction product of an azidated polyol and a poly(alkynyl carbamate) prepolymer reacted at a temperature of from 20° C. to 120° C., wherein the poly(alkynyl carbamate) prepolymer comprises a reaction product of a polyisocyanate and a stoichiometric equivalent of an alkynol of the formula (I),
HC≡C—R.sup.1R.sup.2—OH  (I),
and wherein R.sup.1 is an electron-withdrawing group selected from the group consisting of carbonyl, ester, amide, and urethane and R.sup.2 is a linear or branched alkyl chain having from 1 to 15 carbon atoms. The inventive alternative polyurethane composition position may be used to provide adhesives, sealants, films, elastomers, castings, foams, and composites.

The present invention relates to a two-component system comprising a component A) comprising at least one polymeric polyol which has an OH content of ≤4.5 wt %, based on the total solids content of the polymeric polyol, and a component B) comprising at least one polyisocyanate which has a number average isocyanate group functionality of ≥4.0 to ≤10.0, based on the total solids content of the polyisocyanate, a fraction of ≤25 wt %, based on the total solids content of the polyisocyanate, of oligomers containing isocyanate groups and having a number-average molecular weight of ≤780 g/mol, and an isocyanurate group fraction of ≥5 mol % to ≤70 mol %, based on the total amount of isocyanurate groups and allophanate groups in the polyisocyanate. The invention further relates to a method for producing a coating on a substrate, to the coating obtainable by this method, and to the coated substrate.

A polyurethane composition, which contains at least one isocyanate-group-containing polymer, obtained from the reaction of at least one polyol with at least one diisocyanate, and at least one oxazolidine of the formula (I). The polyurethane composition allows one-component moisture-curing adhesives, sealants or coatings that have good storage stability, long open times and cure quickly to give a surprisingly non-tacky material having pronounced high-resilient properties.

Provided is a polymer capable of providing a coating film that has good initial adhesiveness to a base material and good adhesiveness thereto after a pressure cooker test, and has excellent abrasion resistance as determined by a falling sand abrasion test. The polymer includes a perhaloolefin unit, a vinyl ester unit that contains neither a hydroxy group nor an aromatic ring; and a hydroxy group-containing monomer unit. The polymer has a hydroxyl value of 110 mgKOH/g or greater.

The present invention provides an adhesive composition which is a primerless urethane-based adhesive and has high adhesive force with respect to a polyolefin-based resin. An adhesive composition according to the present invention is a two-liquid type urethane-based adhesive composition comprising: a main agent which comprises (A) a urethane prepolymer having an isocyanate group at the end thereof, (B) a polyfunctional isocyanate compound having an alkoxysilyl group which can be obtained through a reaction of a silane compound having at least two alkoxysilyl groups in one molecule and a polyisocyanate having an isocyanate group at the end thereof and (C1) a first curing catalyst; and a curing agent which comprises (D) a hydrophobic polyol and (C2) a second curing catalyst.

The invention relates to a curable amphiphilic siloxane polyurethane coating composition. The invention also relates to methods of making and using the curable amphiphilic siloxane polyurethane coating composition of the invention. The invention also relates to methods for reducing or preventing biofouling of a surface exposed to an aqueous environment comprising the use of the curable amphiphilic siloxane polyurethane coating composition of the invention.

The invention relates to a curable amphiphilic siloxane polyurethane coating composition. The invention also relates to methods of making and using the curable amphiphilic siloxane polyurethane coating composition of the invention. The invention also relates to methods for reducing or preventing biofouling of a surface exposed to an aqueous environment comprising the use of the curable amphiphilic siloxane polyurethane coating composition of the invention.