摘要:
A coating composition including at least one solvent, at least one resin, at least one drier, and an anti-skinning agent is provided, an anti-skinning composition, wherein the anti-skinning composition comprises at least 92 wt. %, or more particularly at least 98 wt. %, of an alkyl oxime having five carbon atoms selected from 2-pentanone oxime and 3-methyl-2-butanone oxime. In some embodiments, the high-purity 2-pentanone oxime includes less than 0.5 wt. % methyl isobutyl ketoxime. In some embodiments, the composition includes less than 0.006 wt. % methyl isobutyl ketoxime. A method for the preparation of a purified 2-pentanone stream suitable for oximation to a high-purity 2-pentanone oxime is also provided.
摘要:
The invention provides anti-skinning compositions for use in manufacturing oil-based coating materials. The novel anti-skinning compositions are clear, homogeneous solutions of cyclohexanone oxime that can be prepared by dissolving cyclohexanone oxime in a suitable carboxylic acid or mixture of carboxylic acids. Suitable carboxylic acids include fatty acids, such as fatty acids of tall oil distillate. Surprisingly, the fatty acids are useful as delivery solvents over a useful range of temperatures and have desirable flash points. They are compatible with many oil-based coating materials. The anti-skinning compositions and manufacturing methods of the present invention are especially useful in the manufacture of oil-based paints containing metal carboxylate driers.
摘要:
The invention relates to a process for preventing skinning of a coating composition comprising adding an anti-skinning agents containing mixtures of organic compounds (combinations of additives), whereby the organic compounds are selected from the groups of organic hydroxylamines, and β-dicarbonyl compounds and/or selected derivatives of formic acid to the coating composition.
摘要:
The invention relates to a coating material, paint or finish which contains as anti-skinning agents a combination of at least one organic and/or inorganic oxygen scavengers and a nitrogen-containing aromatic compound and also relates to compositions containing the combination, especially oxidatively drying paints or coating compositions and articles coated with such oxidatively drying paints or coating compositions.
摘要:
The present invention relates to compositions containing oxidatively drying binders and, as anti-skinning additives, tin(II) and tin(IV) compounds corresponding to formulas (I) and (II) R1—COO—Sn—OOC—R2 (I), and (R1—COO)(R2—COO)n—Sn(R3)(R4)m (II), wherein R1, R2, R3 and R4 are the same or different and represent linear or branched C1-C18 alkyl, C5-C7 cycloalkyl or phenyl, n and m are the same or different and have a value of 0, 1 or 2 and n+m=2, wherein the additives are present on the surface of the compositions as opposed to being mixed throughout the compositions.
摘要:
A coating composition including at least one solvent, at least one resin, at least one drier, and an anti-skinning agent is provided, an anti-skinning composition, wherein the anti-skinning composition comprises at least 92 wt. %, or more particularly at least 98 wt. %, of an alkyl oxime having five carbon atoms selected from 2-pentanone oxime and 3-methyl-2-butanone oxime. In some embodiments, the high-purity 2-pentanone oxime includes less than 0.5 wt. % methyl isobutyl ketoxime. In some embodiments, the composition includes less than 0.006 wt. % methyl isobutyl ketoxime. A method for the preparation of a purified 2-pentanone stream suitable for oximation to a high-purity 2-pentanone oxime is also provided.