Moisture barrier coatings and sealants comprised of mixtures of organic wax and wax soluble polymer dispersed into one or more components of a thermoset polymer which may form a semi-interpenetrating polymer network when the thermoset polymer is subsequently cured on the substrate. The organic wax and wax soluble polymer substantially improve the moisture barrier properties of the thermoset polymer and provides an effective moisture barrier coating that is non-tacky at the cure temperature of the thermoset polymer, without the requirement for a cooling step.

The present invention relates to improved water-dispersible polyisocyanates, which feature not only high ease of incorporation into aqueous polyol dispersions, even at low shear rates, for example by hand-incorporation, but also improved optical properties.

A composition comprising (a1) a polyether polyol, (a2) a polyolefine polyol and (a3) a polyester polyol obtainable by epoxidation of an unsaturated fatty acid ester and subsequent ring-opening reaction with a compound containing active hydrogen, can be used for the preparation of PUR foam which distinguishes by low-temperature flexibility and low dielectric loss and is suitable for filling the gap between the condenser core and the outer composite or porcelain insulator in the manufacture of resin impregnated paper (RIP) bushings.

Mixture comprising a) at least one polyisocyanate, b) at least one reaction product of at least one polyisocyanate b1) with at least one compound b2) having at least one hydrophilic group which is not reactive toward isocyanate (group A) and precisely one group which is reactive toward isocyanate (group B) and c) dioxolane.

The invention relates to coating agents that contain thioallophanates, containing silane groups, as cross-linking agents and to the use of said coating agents to produce coatings, in particular clear coats for automobile painting.

This invention provides multifunctional coatings containing multiple components that usually do not associate with one another, from deposition of waterborne precursor compositions. Some variations provide a multiphase waterborne composition comprising a first-material phase containing a first material and a second-material phase containing a second material that is chemically different than, but covalently bonded to, the first material, wherein the first material and/or the second material contains ionic species. The first-material phase and the second-material phase are microphase-separated on an average length scale of phase inhomogeneity from about 0.1 microns to about 100 microns. The first and second materials may be selected from hydrophobic materials, hydrophilic materials, hygroscopic materials, oleophobic materials, and/or oleophilic materials, for example. Due to the first-material phase and the second-material phase being microphase-separated, the multiphase waterborne composition possesses a simultaneous combination of properties, rather than a combined average. Precursors and methods are also disclosed.

The invention provides a process for production of polyurethane systems by reacting at least one polyol component with at least one isocyanate component in the presence of one or more catalysts for the isocyanate-polyol and/or isocyanate-water reactions and/or the trimerization of isocyanate, wherein said reacting is carried out in the presence of carrier material and polyamine P.

Dispersions are prepared by dispersing a polymer precursor such as a polyol into a non-aqueous fluid. The resulting droplets of the polymer precursor is partially polymerized to produce liquid or partially gelled droplets, and then sized to a target particle size. The sized particles are then cured to form solid particles. The process allows for close control of particle size, allows for good control of temperature, and is amenable to batch, semi-continuous or even continuous operation. The resulting dispersions are useful as electrorheological fluids.

A composition comprising

(a1) a polyether polyol,

(a2) a polyolefin polyol and

(a3) a polyester polyol obtainable by epoxidation of an unsaturated fatty acid ester and subsequent ring-opening reaction with a compound containing active hydrogen, can be used for the preparation of PUR foam which distinguishes by low-temperature flexibility and low dielectric loss and is suitable for filling the gap between the condenser core and the outer composite or porcelain insulator in the manufacture of resin impregnated paper (RIP) bushings.

An aqueous polyurethane dispersion comprising at least one isocyanate terminated polyurethane prepolymer prepared by reacting in the presence of at least one pyrrolidone selected from the group consisting of N-n-butylpyrrolidone, N-isobutylpyrrolidone, N-sec-butylpyrrolidone and N-tert-butylpyrrolidone, a mixture (M) which comprises: at least one polyisocyanate compound (a), at least one polyol compound (b), having a molecular weight Mw of 200 to 8000 and a hydroxyl functionality of 1.5 to 6, and at least one water dispersible enhancing component having at least one hydrophilic group or potentially hydrophilic group in water.