The present invention relates to a self-emulsifying polyisocyanate composition including a reaction mixture of (a) an anionic compound having a specific structure, (b) nonionic hydrophilic group-containing monofunctional alcohol having a specific structure, (c) organic polyisocyanate, and (d) tertiary amine, a two-part coating composition that contains the composition, and a coating film that can be obtained from the coating composition.

Lactide-based random polyester polyols for use in polyurethane compositions are disclosed. The polyester polyols have an OH value in the range of greater than 400 mg KOH/g up to 1100 mg KOH/g and are the reaction product of at least one polycarboxylic acid, at least one lactide, and one or more polyalcohols. The polyester polyols can be formulated into the B-side of a two part polyurethane composition to obtain a polyurethane having improved hardness and solvent resistance and a low VOC content. The polyurethane composition is particularly suitable for polyurethane coating applications.

A hydrophilic polyurethane comprising polymerized units of: (a) a water-soluble polyol having hydroxyl functionality from two to four and a weight-average molecular weight from 800 to 16,000; and (b) an aliphatic polyisocyanate having isocyanate functionality from two to six; wherein polymerized ethylene oxide units comprise at least 85 wt % of said hydrophilic polyurethane; and wherein a product of weight fraction of polymerized ethylene oxide units and polyethylene oxide mean molecular weight is from 4,200 to 16,000.

Disclosed in the present invention is a semiaromatic polyester, a preparation method and application thereof. Having a specific segment length and carboxyl group content, the semiaromatic polyester provides a balance of degradation rate and mechanical properties, compared with known semiaromatic polyesters. The 30-day weight retention of the semiaromatic polyester obtained in the present invention may be contained to from 45 to 70%.

A waterborne poly(alkynyl carbamate) prepolymer is provided which comprises a reaction product of a polyisocyanate comprising a first portion and a second portion of isocyanate groups; an isocyanate-reactive component comprising 0.1 mol % to 6 mol % of a C.sub.10-C.sub.50 glycol ether; and 99.9 mol % to 94 mol % of an alkynol, wherein the mol % is based on the moles of isocyanate in the polyisocyanate, wherein the first portion of isocyanate groups reacts with the C.sub.10-C.sub.50 glycol ether, wherein the second portion of isocyanate groups reacts with the alkynol, and wherein reaction occurs optionally in the presence of a catalyst. The reaction of long chain glycol ethers with the polyisocyanate at a level of from 0.1 mol % to 6 mol % imparts water dispersibility to the prepolymer, and when the prepolymer is dispersed in water, the performance of waterborne alternative polyurethane compositions made therefrom, such as coatings, adhesives, sealants, films, elastomers, castings, foams, and composites, are not compromised. The invention allows for the use of water as a carrier, thus eliminating the need for organic solvents.

The invention relates to a polyurea compound, which can be produced by reacting a polyisocyanate with a dialkoxy amino silane according to general formula R.sup.1(R.sup.1O).sub.2Si(CH.sub.2).sub.mNHR.sup.2 and optionally also with a trialkoxy amino silane according to general formula (R.sup.1O).sub.3Si(CH.sub.2).sub.nNHR.sup.2 wherein the groups R.sup.1 are selected independently from one another from C.sub.1-C.sub.20-alkyl or C.sub.6-C.sub.20-aryl, n and m are each whole numbers between 1 and 4, the groups R.sup.2 are selected independently from one another from —H, C.sub.1-C.sub.2O-alkyl, C3-C12-cycloalkyl, and —CHR.sup.3CH.sub.2COOR.sup.4, the groups R.sup.3 are selected independently from one another from H, C.sub.1-C.sub.20-alkyl and —COOR.sup.4, and the groups R.sup.4 represent C.sub.1-C.sub.20-alkyl independently from one another. The invention also relates to the use of the compound as a binder for producing coatings.

The present application relates to a coating composition, a process for preparing the coating composition and an article containing a coating formed by the coating composition. It relates in particular to a dual-curing coating system, comprising: a film-forming resin composition comprising an aqueous dispersion of at least one carboxyl functional polymer; a first crosslinking agent comprising an epoxy silane; and a second crosslinking agent comprising an isocyanate.

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.

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 present invention relates to two-component topcoat systems comprising polyaspartic esters that contain only small amounts of dialkyl fumarates, to a process for the production thereof and for the use thereof in the production of coatings, in particular for corrosion protection, and to the use in the field of general industrial painting or in the field of ACE (agriculture, construction and earth-moving equipment) and to substrates coated therewith.