A coating composition, its preparation method and use thereof
A composition, coating technology, applied in the direction of coating, etc.
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[0038] In the preparation of polyesters, polycarboxylic acids such as aliphatic polycarboxylic acids such as adipic acid, and polyols such as aliphatic polyols such as aliphatic triols and tetraols such as trimethylolpropane can be used , glycerin, pentaerythritol, or any combination thereof.
[0039] It is likewise possible to use aromatic polycarboxylic acids and aromatic polyols, or polyhydric compounds containing not only (straight-chain, branched and / or cyclic) aliphatic groups but also aromatic groups in addition to the functional groups defining their class of compounds. Carboxylic acids and polyols. Straight-chain, branched and / or cyclic aliphatic and / or aromatic hydroxycarboxylic acids and lactones can also be used, i.e. hydroxycarboxylic acids and lactones which, in addition to having functional groups which define their class of compounds, also have a linear , branched and / or cycloaliphatic and / or aromatic groups.
[0040] Therefore, in some embodiments of the pre...
Embodiment approach
[0100] The invention provides a coating composition comprising:
[0101] a) 25-50% by weight, preferably 28-40% by weight, more preferably 30-35% by weight of polymers selected from polyacrylates (A1) and / or polyesters (A2) having a crosslinkable amount of hydroxyl groups Binder as component (A), b) 15-25% by weight, preferably 16-20% by weight, of a crosslinker having functional groups reactive towards OH groups as component (B), and
[0102] c) 35-50% by weight of at least one monomeric and / or oligomeric reactive diluent having at least one ethylenic double bond as component (C),
[0103] Weight percents are based on the total weight of the coating composition.
[0104] Preferably, the coating composition has a hardness of at least 110 seconds, more preferably at least 120 seconds, even more preferably at least 130 seconds, particularly preferably at least 150 seconds after curing to form a coating, measured according to standard DIN EN ISO 1522.
[0105] Preferably, the p...
Embodiment
[0126] Material information:
[0127] Laromer LR 9000: reactive diluent, isocyanate-functional acrylate, commercially available from BASF AG;
[0128] Desmodur 3300: hardener, aliphatic polyisocyanate (HDI trimer), commercially available from Covestro AG;
[0129] Desmodur 3370: hardener, aliphatic polyisocyanate (blocked HDI trimer), commercially available from Covestro AG;
[0130] Desmodur BL 3575: hardener, aliphatic polyisocyanate (blocked HDI trimer), commercially available from Covestro AG;
[0131] Luwipal 014: hardener, melamine-formaldehyde amino resin etherified with n-butanol, commercially available from BASF AG;
[0132] Luwipal 018: hardener, melamine-formaldehyde amino resin etherified with n-butanol, commercially available from BASF AG;
[0133] Luwipal 072: Hardener, melamine-formaldehyde amino resin etherified with alcohol, commercially available from BASF AG.
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Abstract
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