The present invention relates to a selective process for the preparation of NCO-functionalized polyols, to their use in the preparation of silylated polyurethanes, to processes for preparing silylated polyurethanes and to silylated polyurethanes obtainable by a reaction of NCO-functionalized polyol with amino silane and to their use in CASE applications (coatings, adhesives, sealants and elastomers).

Processes for making a molded flexible foam. The processes include: (a) depositing a foam-forming reaction mixture onto a surface of a mold cavity, and (b) allowing the foam-forming reaction mixture to react in the mold cavity. The foam-forming reaction mixture comprises: (1) a polyisocyanate present in an amount of less than 45% by weight, based on the total weight of the foam-forming reaction mixture; (2) an isocyanate-reactive composition comprising at least 50% by weight, based on the total weight of polyol in the isocyanate-reactive composition, of a polyether polyol having a functionality of greater than 2, an oxyethylene content of 0 to 50% by weight, based on the total weight of the polyether polyol, more than 50 mol % of primary OH groups, and an OH number of 8 to 112 mg KOH/g; (3) a blowing agent comprising water present in an amount of at least 0.5% by weight, based on the total weight of the foam-forming reaction mixture; and (4) a tin-free metallic catalyst composition comprising a bismuth-based catalyst and a zinc-based catalyst.

Aqueous coating compositions include dispersed polyurethane-vinyl polymer hybrid particles obtained by free-radical polymerization of at least one vinyl monomer in the presence of a polyurethane. The polyurethane and the vinyl polymer in the hybrid particles are present in a weight ratio of polyurethane to vinyl polymer ranging from 1:1 to 20:1, and the polyurethane is the reaction product of at least the following components: (a) from 5 to 40 wt. % of at least one organic difunctional isocyanate, (b) from 0.5 to 4 wt. % of an isocyanate-reactive compound containing ionic or potentially ionic water-dispersing groups having a molecular weight of from 100 to 500 g/mol, (c) from 40 to 80 wt. % of at least one diol having a molecular weight from 500 to 5000, (d) from 0 to 10 wt. % of at least one active-hydrogen chain extending compound with a functionality of at least 2 other than water, (e) from 0 to 10 wt. % of at least one diol having a molecular weight below 500 g/mol. The isocyanate and hydroxy groups on the components used are present in a respective mole ratio (NCO to OH) in the range of from 0.8:1 to 5:1.

The polyurethane resin composition contains, a polyisocyanate component containing p-MDI, a polyol component, an organic metal catalyst, and a reaction retardant represented by general formula (1) below, wherein the mole ratio of the reaction retardant relative to 1 mol of the organic metal catalyst is 0.50 or more and 2.50 or less. (in general formula (1), A represents an aliphatic ring or an aromatic ring, R.sup.1 represents a hydrocarbon group composing ring A, R.sup.2 represents an aliphatic hydrocarbon group bonded to ring A. R.sup.3 represents a hydrogen atom or alkyl group bonded to nitrogen atom included in ring A. R.sup.1 represents a hydrogen atom or carboxyl group bonded to ring A. m is 1 or 2, n is 0 or 1, and total of n and no is 2 or less.) ##STR00001##

The present invention describes a process for producing an elastomer, preferably a polyurethane-containing elastomer, by reacting a polyol component (A) comprising at least one polyether carbonate polyol (A-1) containing carbon-carbon double bonds with a component (B) which is reactive with OH groups and contains at least one compound reactive toward OH groups, preferably an isocyanate component (B-1) containing NCO groups, in the presence of a free-radical initiator (C), preferably at least one peroxide (C-1), and optionally a catalyst (D), where the molar ratio of the OH-reactive groups of component (B) reactive with groups, to the OH groups of the polyol component (A) containing carbon-carbon double bonds, is greater than 1.0. It further relates to elastomers obtainable by such a process, preferably polyurethane elastomers, the use thereof, and two-component systems for production of elastomers, preferably polyurethane elastomers.

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.

Provided herein is a resin product useful for the production of three-dimensional objects by additive manufacturing, and methods using the same. The resin may include a reactive blocked prepolymer comprising a prepolymer blocked with reactive blocking groups; a polyol; a photoinitiator; and at least one organometallic catalyst. A packaged product useful for the production of three-dimensional objects by additive manufacturing, the product comprising a single container having a single chamber and a resin in the chamber with all components mixed together, is also provided.

An object of the present invention is to provide a compound suitable for use as a latent curing agent, which does not produce an aldehyde compound when caused to react with an isocyanate compound. The present invention provides, as the compound, a silylamine compound represented by the following formula (1):

##STR00001##

in the formula (1), R.sup.1 to R.sup.12 each independently represent an alkyl group having 1 to 6 carbon atoms, R.sup.13 represents an alkylene group having 2 to 12 carbon atoms or an arylene group having 6 to 12 carbon atoms, R.sup.14 to R.sup.21 each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, “y” and “z” each independently represent an integer of from 1 to 11, and “n” represents an integer of from 1 to 43.

The present invention is directed to an aqueous curable film-forming composition comprising: (a) a film-forming component comprising an aliphatic di- or higher functional polyisocyanate; and (b) a catalyst additive comprising: (i) a catalytic organic compound comprising iron and/or tin; and (ii) a beta-diketone. The present invention is further directed to a method of controlling the rate of cure of an aqueous curable film-forming composition. The method comprises adding to the aqueous curable film-forming composition the catalyst additive described above; the aqueous curable film-forming composition comprises a film-forming component comprising an aliphatic di- or higher functional polyisocyanate. The present invention is additionally directed to a coated article comprising a cured coating layer applied on at least one surface of a substrate to form a coated substrate; wherein the cured coating layer is deposited from the aqueous curable film-forming composition described above.

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.