C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
402/140, 117/195
C08L 75/12 (2006.01) C08G 18/12 (2006.01) C08G 18/38 (2006.01) C08G 18/44 (2006.01) D06N 3/14 (2006.01)
Patent
CA 1186441
ABSTRACT OF THE DISCLOSURE The invention relates to low-solvent, thermo- setting reactive polyurethane coating compositions which are particularly resistant to light, oxidation and hydrolysis, do not crystallize or harden and com- prise the following components: A) a ketoxime-blocked NCO-prepolymer of 1. 1 mole of 2- to 4-functional, relatively high molecular weight polyhydroxyl compounds compris- ing a polyester polycarbonate based on ester glycols of .epsilon.-caprolactone and 1,6-hexane diol; 2. about 0.1 to 1.2 moles of low molecular weight polyols containing bis-carbazinic ester polyols corresponding to the following general formula Image in which R is a straight-chain and/or branched Cl-C5-alkylene or hydroxyl-substituted alkylene radical, and low molecular weight diols and triols preferably containing tertiary amino groups, and 3. aliphatic and/or cycloaliphatic diisocyanates in an NCO/OH ratio of from about 1.5:1 to 6:1 and 4. ketoximes; B) aliphatic and/or cycloaliphatic polyamines contain- ing at least two primary amino groups and C) up to about 40% by weight of organic solvents. The invention also relates to a process for producing the low-solvent reactive coating compositions and to their use for coating substrates by the direct, reverse and/or matrix coating process.
402793
K"onig Klaus
Konig Eberhard
Pedain Josef
Thoma Wilhelm
Aktiengesellschaft Bayer
Marcoux & Sher Swabey Mitchell Houle
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