Polyurethane foams are made by curing a reaction mixture that contains an aromatic polyisocyanate, at least one isocyanate-reactive material having an average functionality of at least 2 and an equivalent weight of at least 200 per isocyanate-reactive group, at least one blowing agent, at least one surfactant and at least one catalyst, at least one cyclic 1,3-diketone compound, at least one aminoalcohol or alkylhydroxylamine and an alkali metal, phosphonium or ammonium sulfite. Foams so produced emit low levels of formaldehyde, acetaldehyde, acrolein and propionaldehyde.

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.

The present invention relates to a crosslinkable composition comprising a polyol, a polyisocyanate crosslinker, a catalyst for catalysing the reaction between —OH groups of said polyol and —NCO groups of said crosslinker, a tertiary acid of formula RR′R″CCOOH (I), wherein each R, R′ and R″ group, independently, is an alkyl, alkenyl, aryl or aralkyl group containing at least one carbon atom, with the proviso that two or three of the R, R′ and R″ groups can be linked to form a ring structure and wherein the R, R′ and/or R″ groups can be substituted, and optionally, a complexing agent containing at least one —SH group, as well as its use for making coatings having improved application properties.

A multi-layer coating system includes: (a) a first basecoat layer formed from a first coating composition including a free polyisocyanate and hydroxyl functional polymeric core-shell particles; (b) a second basecoat layer applied over at least a portion of the first basecoat layer, the second basecoat layer formed from a second coating composition including carboxylic acid functional polymeric core-shell particles; and (c) a topcoat layer applied over at least a portion of the second basecoat layer, the topcoat layer formed from a coating composition including least one free polyisocyanate having a weight average molecular weight of less than 600 g/mol and at least one film-forming resin in which an amount of free polyisocyanate having a weight average molecular weight of less than 600 g/mol is greater than 5 weight %, based on the total resin solids of the coating composition that forms the topcoat layer.

This invention relates to a surface-deactivated solid polyisocyanate and a thermally curable adhesive composition comprising the same, which are suitable for assembling articles of various substrates such as plastic materials. In particular, the present invention relates to a surface-deactivated solid polyisocyanate and a thermally curable adhesive composition comprising the same which is storage stable at room temperature, can be cured at a temperature lower than 100 C. and meanwhile have excellent adhesion and mechanical properties when cured.

The invention relates to a process for producing a ring-opening polymerization product by reacting at least one polyisocyanate and 2-oxo-1,3-dioxolane-4-carboxylic acid and subjecting the reaction product to a temperature within the range of from about 40 to about 150 C. in the presence of a catalytic amount of at least one non-nucleophilic base. The obtained polymerization product may be present as a foam and is suitable as binder, insulation material, sealant or coating and in the production of mattresses or wound pads.

This description relates to low VOC water borne coating compositions with improved application properties based on a binder mixture comprising an urethanized polyester and an acrylic two-step polymer. This description further relates to the use of the low VOC water borne coating compositions for forming a coating, preferably for forming a clear coat, and more preferably for forming a clear coat in refinishing applications. Moreover, this description also relates to a method of forming a multilayer coating comprising a step of forming a coating layer by using the low VOC water borne coating composition.

A photocurable resin composition according to the present invention contains an anionic-group-containing photosensitive resin comprising a photosensitive urethane resin, a photopolymerization initiator and a thermal curing agent, wherein the photosensitive urethane resin is produced by reacting a raw material mixture containing (A) a polyol having at least an ester bond and also having an unsaturated bond at least in the main chain thereof, (B) a compound having at least one active-hydrogen-containing group and at least one anionic group in the molecule thereof, (C) a polyisocyanate and (D) a compound having at least one active-hydrogen-containing group and an unsaturated bond group in the molecule thereof, and the photosensitive urethane resin has an ester bond and an unsaturated bond in the main chain in the same molecule, wherein at least one of a side chain and a terminal has an anionic group and a side chain has an unsaturated bond group.

A description is given of the use of compounds having n 2-oxo-1,3-dioxolane-4-carboxamide units as a reactive component in 2-component adhesives, especially for preparing hydroxypolyurethanes or hydroxypolycarbonates for adhesives applications, where n is a number greater than or equal to 2. A description is also given of corresponding two-component adhesives and adhesive bonding methods. Employed preferably as a second component of the two-component adhesive is a polyfunctional curing agent compound which is preferably selected from polyamines which have two or more amine groups and polyols which have two or more alcoholic hydroxyl groups.

An embodiment relates to a polymeric composition for a polythiourethane-based optical material, wherein the polymeric composition, comprising a particular additive, may appropriately adjust the reactivity of an isocyanate such that viscosity is maintained low for a predetermined period of time, and thus is capable of preparing a high-quality polythiourethane-based optical material, without a complicated purification process. Moreover, a polythiourethane-based optical material according to an embodiment has not only a uniform refractive index, but also a low yellow index, and thus may be used as a variety of plastic optical lenses, such as an eyeglass lens or a camera lens and the like.