摘要:
The present invention is directed to a non-aqueous composition curable by UV radiation broadly comprising a mixture of two UV curable urethane acrylates. The invention is also directed to a coating process using such composition. One of the urethane acrylates is the reaction product of an isocyanate and a specific OH functional lactone ester (meth)acrylate. The other urethane acrylate is the reaction product of an isocyanate and a specific hydroxy functional (meth)acrylate.
摘要:
Solvent-based, dual cure coatings incorporating thermally curable blocked polyisocyanates, which also contain unsaturated linkages, and a method for preparing these coatings. The unsaturated linkages, such as acrylate groups, can be crosslinked by free-radical mechanisms such as UV curing.
摘要:
The present invention relates to novel polyaspartimides, their method of production and the use of these polyaspartimides as reactive components for polyisocyanates in two-component polyurethane coating compositions. The polyaspartimides are prepared by reacting a polyether amine with a maleimide.
摘要:
The present invention relates to a binder-containing coating composition, which may be cured by free radical polymerization, wherein the binder resins contain A) about 10 to 95% by weight of the reaction product of i) one or more polyisocyanates with ii) a hydroxyl component containing ii-a) one or more hydroxyl compounds containing two ethylenically unsaturated groups, B) 0 to about 60% by weight of the reaction product of i) one or more polyisocyanates with ii) a hydroxyl component containing ii-a) one or more hydroxy functional lactone ester (meth)acrylates having a number average molecular weight of about 200 to 2000, and C) 0 to about 85% by weight of the reaction product of i) one or more polyisocyanates with ii) a hydroxyl component containing ii-a) one or more hydroxy functional (meth)acrylates, wherein the coating composition additionally contains one or more copolymerizable monomers D) and/or one or more inert organic solvents E), and wherein i) the %'s by weight of components A), B) and C) total 100%, based on the total weight of components A), B) and C); ii) the %'s by weight of components B) and C) are present in a total amount of at least 5% by weight; and iii) components D) and E) are present in a total amount of at least about 10% by weight. The present invention also relates to a process for coating a substrate using the coating compositions according to the invention.
摘要:
The present invention relates to novel aspartates, their method of production and the use of these aspartates as reactive components for polyisocyanates in two-component polyurethane coating compositions and for preparing polyurethane prepolymers. The aspartates are prepared by first reacting a di- or polyamine with an unsaturated ester and then reacting the resultant product with a maleimide.
摘要:
The present invention relates to novel aspartates, their method of produciotn and the use of these mono and polyaspartates as reactive components for polyisocyanates in two-component polyurethane coating compositions and for preparing polyurethane prepolymers.
摘要:
The present invention is directed to blocked biuret group-containing polyisocyanate compositions, wherein the blocking agent is selected from the group consisting of a blocking agent of the formula: wherein R1, R2, R3 may be identical or different and represent a moiety selected from the group consisting of hydrogen, C1-C4-alkyl and C3-C6-cycloalkyl, R4 represents a moiety selected from the group consisting of C1-C4-alkyl, C6-C10-cycloalkyl or C7-C14-aralkyl, and x represents a number of from 1 to 5, and a blocking agent of the formula: wherein R1, R2, R3 and R4 may be the same or different and represent a moiety selected from the group consisting of hydrogen, C1-C6-alkyl and C3-C6-cycloalkyl, R5 represents a moiety selected from the group consisting of C1-C10-alkyl and C3-C10-cycloalkyl, and B is a group according to one of the following structural formulas wherein each occurrence of R6, R7, and R8 may be the same or different and represent a moiety selected from the group consisting of C1-C6-alkyl and C3-C6-cycloalkyl and R9 is a moiety selected from the group consisting of hydrogen, C1-C6-alkyl and C3-C6-cycloalkyl.
摘要:
This invention relates to polyurethane elastomers and to a process for their production. These elastomers comprise the reaction product of a polyisocyanate component comprising an allophanate modified (cyclo)aliphatic polyisocyanate which has an NCO group content of about 15 to about 35% or a prepolymer thereof, with an isocyanate-reactive component comprising a low unsaturation polyether polyols, a low molecular weight organic compound containing two hydroxyl groups and which is free of amine groups, and, optionally, one or more organic compounds having a molecular weight of about 200 to about 500, a hydroxyl functionality of 3 to 4 and comprising an amine-initiated polyether polyol.
摘要:
The present invention is directed to a polyisocyanate mixture i) having an NCO content of 5 to 35% by weight and a monomeric diisocyanate content of less than 3% by weight, and prepared from a polyisocyanate adduct, ii) containing allophanate groups in an amount such that there are more equivalents of allophanate groups than urethane groups and such that the polyisocyanate mixture remains stable and homogeneous in storage for 1 month at 25° C. and iii) containing siloxane groups (calculated as SiO, MW 44) in an amount of 0.002 to 50% by weight, wherein the preceding percentages are based on the solids content of the polyisocyanate mixture and wherein the siloxane groups are incorporated by reacting an isocyanate group with a compound containing one or more hydroxyl groups directly attached to a carbon atom and one or more siloxane groups. The present invention is also directed to a process for the production of this polyisocyanate mixture and to its use, optionally in blocked form, as an isocyanate component in one- or two-component coating compositions.
摘要:
A two-component coating composition that includes (A) a first component containing an acid functional aliphatic polyester polyol having an acid number of at least 20 mg KOH/g and a hydroxyl number of from 50 to 500 mg KOH/g, and (B) a second component comprising one or more polyisocyanates. The composition can be used to coat metal substrates by (i) mixing components (A) and (B) in the above-described composition to form a mixture; and (ii) applying the mixture to a surface of a metal substrate.