Bayer Materialscience Ag

Allnex IP S.a.r.l.

Jörg Schmitz

Holger Mundstock

Wolfgang Fischer

Jan Weikard

Dorota Greszta-Franz

Frank Richter

Christophe Detrembleur

Christophe Dètrembleur

Christoph Gürtler

Christian Wamprecht

Martin Melchiors

Meike Niesten

Hanns-Peter Müller

Christophe Gürtler

The present invention relates to a process for preparing radiation-curing binders containing allophanate groups by reacting at temperatures of &#x2266;130&#xb0; C. A) one or more compounds containing uretdione groups with B) one or more OH-functional compounds which contain groups which react, with polymerization, with ethylenically unsaturated compounds on exposure to actinic radiation, (radiation-curing groups), C) optionally NCO-reactive compounds other than B), in the presence of D) a catalyst containing at least one tetrasubstituted ammonium or phosphonium salt of an aliphatic or cycloaliphatic carboxylic acid, to form allophanate groups by opening the uretdione ring. The present invention also relates to the binders obtained by the process of the invention.

Low viscosity allophanates containing actinically curable groups

The invention relates to a process for preparing binders which contain 1) allophanate groups, 2) groups that react with ethylenically unsaturated compounds with polymerization on exposure to actinic radiation (radiation-curing groups) and 3) optionally NCO-reactive groups, by reacting at temperatures &#x2266;130&#xb0; C. The present invention also relates to the binders obtained by the process of the invention.

Radiation-curing binders and a process for their preparation

The present invention relates to a process for preparing radiation-curing binders containing allophanate groups by reacting, at temperatures of &#x2266;130&#xb0; C., A) one or more compounds containing uretdione groups with B) one or more OH-functional compounds which contain groups which react, with polymerization, with ethylenically unsaturated compounds on exposure to actinic radiation (radiation-curing groups), C) optionally NCO-reactive compounds other than B), in the presence of D) a catalyst containing at least one zinc compound, to form allophanate groups by opening the uretdione ring. The present invention also relates to the binders obtained by the process of the invention and to coating compositions containing these binders.

The present invention relates to polyacrylate-modified polyisocyanates which are i) prepared from aromatic, araliphatic, cycloaliphatic and/or aliphatic polyisocyanates having an NCO content of 5% to 25% by weight, an NCO functionality &#x2267;2 and a viscosity measured as solvent free resin of 150 to 200,000 mPa&#xb7;s at 23&#xb0; C., and ii) contain at least one structural unit of the formula (I) 

Polyisocyanate mixtures, a process for their preparation and their use in coating compositions

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.

Low-viscosity allophanates containing actinically curable groups

The present invention relates to a process for preparing radiation-curing binders containing allophanate groups by reacting at temperatures of &#x2266;130&#xb0; C.

A process for preparing polymers containing polyortho ester groups and optionally NCO groups by reacting A) and B) where A) is a polyortho ester containing at least one isocyanate-reactive group prepared by reacting at least one or more acyclic ortho esters with low molecular weight polyols having a functionality of 4-8 and a number-average molecular weight of 80-500 g/mol and B) is least one polyisocyanate. The polymers obtained from the process can be used to produce coatings, adhesive bonds and/or seals. The coating compositions can include one or more of the above-described polymers, optionally polyisocyanates, catalysts, and optionally auxiliaries and additives and can be used to coat substrates.

Binders containing ortho ester groups

Process for preparing binders including reacting A) one or more NCO-functional compounds containing uretdione groups with B) one or more compounds containing groups capable of participating in polymerization reaction with ethylenically unsaturated compounds on exposure to actinic radiation, and contain isocyanate-reactive groups, followed by C) reaction with one or more hydroxyl-containing compounds other than B), wherein at least one of these compounds has an OH functionality of&#x2267;2, D) in the presence of one or more compounds containing phenoxide groups, as catalysts, and E) optionally auxiliaries and additives, where the reaction with compounds of component C) proceeds at least proportionally with the formation of allophanate groups and where and including binders containing allophanate groups and groups capable of participating in a polymerization reaction with ethylenically unsaturated compounds on exposure to actinic radiation, and optionally also contain NCO-reactive groups. The binders are used in coating compositions used to coat substrates.

Growing community of inventors

Kö'ln, Germany

Jörg Schmitz