摘要:
The present invention relates to a process for heterogeneously catalyzed partial esterification of (meth)acrylic acid with oxyalkylated polyols, wherein the oxyalkylated polyols have at least 3 free hydroxyl groups, and wherein the catalyst is selected from the group comprising acidic ion exchange resins and/or acidic zeolites. The invention further relates to (meth)acrylic esters and urethane acrylates, obtained by a process according to the present invention, and to the use thereof as radiation-curable compounds.
摘要:
Powder coating binders having a glass temperature of ≧35° C. containing at least one polymer and one or more radiation-curing reactive thinners, a process for the production of these powder coating binders and their use as a component of powder coatings.
摘要:
A process for preparing binders containing allophanate groups which contain, at the oxygen atom of the allophanate group that is bonded via two single bonds, organic radicals with activated groups capable of participating in a polymerization reaction with ethylenically unsaturated compounds on exposure to actinic radiation; the process includes reacting A) one or more compounds containing uretdione groups with B) one or more OH-functional compounds which contain groups capable of participating in a polymerization reaction with ethylenically unsaturated compounds on exposure to actinic radiation, and C) optionally further NCO-reactive compounds, and D) in the presence of one or more compounds containing phenoxide groups, as catalysts. The binders can be used in preparing coatings, coating materials, coating compositions, adhesives, printing inks, casting resins, dental compounds, sizes, photoresists, stereolithography systems, resins for composite materials and sealants.
摘要:
Powder coating binders having a glass temperature of ≧35° C. containing at least one polymer and one or more radiation-curing reactive thinners, a process for the production of these powder coating binders and their use as a component of powder coatings.
摘要:
The present invention relates to a process for process for preparing a coating by a) applying to a porous and/or absorbent substrate a liquid coating composition containing at least one component having (meth)acryloyl groups and a dynamic viscosity of less than 2000 mPa.s and 0.1 to 10 wt. %, based on the non-volatile content of the coating composition, of an additive selected from polyamides, oligomeric fatty acid amides and polymeric fatty acid amides and b) polymerizing the composition with radiation. The present invention also relates to the resulting coated substrates and to the coating compositions used in the process.
摘要:
The present invention relates to radiation curable aqueous polyurethane dispersions containing 0.05 to 20 wt. %, based on the weight of the non-aqueous constituents of the aqueous polyurethane dispersions, of 2,2-dimethyl-3-hydroxypropionic acid-(2,2-dimethyl-3-hydroxypropyl ester), (HPSNPG, calculated as MW 204.3). The invention also relates to substrates coated with these polyurethane dispersions, in particular to coated wood substrates with good grain enhancing properties.
摘要:
The present invention relates to a radiation-curable, aqueous polyurethane emulsion which is prepared by I) reacting A) 40 to 90 wt. % of an isocyanate-reactive component that contains a polyester acrylate containing hydroxyl groups and having an OH content of 40 to 200 mg KOH/g and optionally other isocyanate-reactive compounds other than B) and B) 0.5 to 20 wt. % of one or more monofunctional and/or difunctional isocyanate-reactive compounds that contain cationic or anionic groups, potential cationic or anionic or hydrophilic ether groups, with C) 10 to 50 wt. % of one or more diisocyanates and/or polyisocyanates, II) optionally converting any potential cationic or anionic groups into cationic or anionic groups by salt formation and III) forming a dispersion of the reaction product of A), B) and C) in water and reacting it with D) 0.1 to 10 wt. % of one or more diamines and/or polyamines, wherein the wt. % percentages of (A) to (D) add up to 100%, and the equivalent ratio of the sum of the isocyanate-reactive groups in (A) and (B) to the isocyanate groups in (C) is 0.8:1 to 1.25:1 and the reaction of components (A) and (B) with (C) is carried out such that 65 to 95% of the isocyanate groups in (C) react with the isocyanate-reactive groups of (A) and (B). The present invention also relates to a process of making these polyurethane emulsions and to substrates coated with the polyurethane emulsions.
摘要:
The present invention relates to urethane acrylates, which may be cured with high-energy radiation, in which the urethane acrylates are the reaction product of a) a polyisocyanate component containing 20 to 100 mole %, based on the moles of the polyisocyanate component a), of iminooxadiazine dione group-containing polyisocyanate trimers corresponding to formula A wherein R1, R2and R3 are the same or different and represent linear or branched, C4-C20 (cyclo)alkyl groups and X is the same or different and represents isocyanate groups or isocyanate group-containing radicals that also contain iminooxadiazine dione, isocyanurate, uretdione, urethane, allophanate, biuret or oxadiazine trione groups, wherein R1, R2 and R3 are attached to a nitrogen atom, with b) an alcohol component containing at least one monobasic, hydroxy-functional, linear or branched C1-C12 alkyl ester of (meth)acrylic acid. The present invention further relates to the use of the urethane acrylates as binder components for coating compositions that are curable with high-energy radiation.
摘要:
The present invention provides a process for preparing radiation-curing allophanates having residual monomer contents of less than 0.5% by weight and an NCO content of less than 1% by weight, wherein (A) compounds containing isocyanate groups, (B) hydroxy-functional compounds which contain groups which react, with polymerization, with ethylenically unsaturated compounds on exposure to actinic radiation (radiation-curing groups) and (C) optionally further compounds containing NCO-reactive groups, also optionally in the presence of a catalyst, are used to form NCO-group-containing urethanes having radiation-curing groups, which are subsequently reacted, without further addition of compounds containing isocyanate groups, in the presence of an allophanatization catalyst, the ratio of NCO groups of the compounds from A) to the OH groups of the compounds from B) and, where used, C) being 1.45:1.0 to 1.1:1.0.