LOW SURFACE ENERGY POLYISOCYANATES AND THEIR USE IN ONE- OR TWO-COMPONENT COATING COMPOSITIONS

The present invention is directed to a polyisocyanate mixture i) having an NCO content of 5 to 35% by weight and prepared from an organic diisocyanate, ii) containing at least 1% by weight of isocyanurate groups (calculated as N3,C3,O3, MW 126), iii) containing allophanate groups in an amount such t...

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Bibliographic Details
Main Authors YESKE, PHILIP E, SQUILLER, EDWARD P, SLACK, WILLIAM E
Format Patent
LanguageEnglish
French
Published 29.04.2008
Subjects
ADHESIVES
CHEMICAL PAINT OR INK REMOVERS
CHEMISTRY
COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS
COMPOSITIONS BASED THEREON
CORRECTING FLUIDS
DYES
FILLING PASTES
HETEROCYCLIC COMPOUNDS
INKS
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
ORGANIC CHEMISTRY
ORGANIC MACROMOLECULAR COMPOUNDS
PAINTS
PASTES OR SOLIDS FOR COLOURING OR PRINTING
POLISHES
THEIR PREPARATION OR CHEMICAL WORKING-UP
USE OF MATERIALS THEREFOR
WOODSTAINS
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Summary:The present invention is directed to a polyisocyanate mixture i) having an NCO content of 5 to 35% by weight and prepared from an organic diisocyanate, ii) containing at least 1% by weight of isocyanurate groups (calculated as N3,C3,O3, MW 126), iii) containing allophanate groups in an amount such that there are more equivalents of allophanate groups than urethane groups and iv) containing fluorine (calculated as F, AW 19) in an amount of 0.001 to 50% by weight, wherein the preceding percentages are based on the solids content of the polyisocyanate mixture, excluding any unreacted organic diisocyanate, and wherein fluorine is incorporated by reacting an isocyanate group with a compound containing two or more carbon atoms, one or more hydroxyl groups and one or more fluorine atoms to form urethane groups and converting a sufficient amount of these urethane groups to allophanate groups to satisfy the requirements of iii), provided that the polyisocyanate mixture contains sufficient allophanate groups to ensure that the polyisocyanate mixture remains stable and homogeneous in storage for 3 months at 25.degree.C. The present invention is also directed to a process for the production this polyisocyanate mixture and to its use, optionally in blocked form, as an isocyanate component in one- ortwo-component coating compositions.
Bibliography:Application Number: CA19952156244