摘要:
Paint in a container is inhibited against skinning by providing a layer of a barrier material comprising an inhibiting composition having a boiling point of at least 250° C. and optionally water on the upper surface the bulk paint in the container.
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 anti-skinning agents containing mixtures of organic compounds (combinations of additives), whereby the organic compounds are selected from the groups of (a) organic hydroxylamines and (b) alkylamines and/or alkyl alkanolamines and also relates to compositions containing the combination, especially oxidatively drying paints or coating compositions and article coated with such oxidatively drying paints or coating compositions.
摘要:
The present invention relates to a coating composition containing an oxidatively drying binder and, as anti-skinning agents, a mixture of A) an aliphatic amine corresponding to formula (Ia) and/or its salts corresponding to formula (Ib): 1 wherein R1, R2 and R3 each independently of the others represents hydrogen (H); a linear or branched C1-C20-alkyl radical which is optionally unsaturated or which is optionally mono- or poly-substituted by a hydroxyl radical, an alkoxy radical, an amine radical corresponding to the formula N(R1)(R2), or a C5-C7-cycloalkyl radical, and Anull represents a salt-forming anion, and B) with a compound corresponding to formula (II) 2 wherein R1 and R4 each independently of the other represents hydrogen (H), a C1-C4-alkyl radical, a C6-C24-aryl radical or a C5-C7-cycloalkyl radical, a hydroxyl radical or a C1-C4-alkoxy radical, nullOnull (oxygen anion), R2 represents H, a C1-C4-alkyl radical, or Anull (anion), R3 represents H, a C1-C4-alkyl radical, and n represents 0, 1 or 2.
摘要:
Unsymmetrical dimethylhydrazine is added to air-drying liquid film-forming compositions to prevent the compositions from skinning when stored in a sealed container. The proportion of dimethylhydrazine may be from 0.05 to 0.5 per cent. The film-forming compositions may consist of any of the usual drying or semi-drying oils, e.g. linseed oil, tung oil, dehydrated castor oil, soya bean oil, oiticica oil, sunflower oil, perilla oil or cashew nut oil, eithe raw or boiled, heat-blown or otherwise conventionally modified; the esters of acids obtained from such oils and polyhydric alcohols such as glycerol, ethylene glycol, pentaerythritol, dipentaerythritol, sorbitol, mannitol or erythritol; or the pure esters of drying or semi-drying oil fatty acids such as linoleic, oleic, linolenic, ricinoleic or elaeostearic acid with such polyhydric alcohols. The film-forming compositions may also be prepared from drying or semi-drying oilmodified resins such as modified alkyd resins prepared by the esterification of glycerol, phthalic anhydride and drying or semi-drying oil fatty acids; modified phenolic resins prepared by the reaction of cresols, formaldehyde and drying or semi-drying oils; modified esters of rosin or of modified (hydrogenated, isomerized and polymerized) rosins prepared by the esterification of rosin or modified rosin, glycerol or pentaerythritol and drying or semi-drying oil fatty acids. The compositions may also include, if desired, pigments (e.g. titanium dioxide, calcium sulphate, zinc oxide, carbon black, chrome green and iron oxide), resins (e.g. paratertiary butyl- or amyl-phenolformaldehyde, urea formaldehyde, rosin, copal, kauri, congo, manila or dammar) solvents (e.g. butyl alcohol, toluene, turpentine or xylene), thinners such as mineral spirits, and driers (e.g. lead, cobalt or manganese naphthenate, oleate or octoate). Examples which are given all relate to phenolictung oil varnishes containing from 0.1 to 0.4 per cent of unsymmetrical dimethylhydrazine.ALSO:Unsymmetrical dimethylhydrazine is added to air-drying liquid film-forming compositions to prevent the compositions from skinning when stored in a sealed container. The proportion of dimethyl hydrazine may be from 0.05 to 0.5 per cent. The film-forming compositions may consist of any of the usual drying or semi-drying oils, e.g. linseed oil, tung oil, dehydrated castor oil, soya bean oil, oiticica oil, sunflower oil, perilla oil or cashew nut oil, either raw or boiled, heat-blown or otherwise conventionally modified; the esters of acids obtained from such oils and polyhydric alcohols such as glycerol, ethylene glycol, pentaerythritol, dipentaerythritol, sorbitol, mannitol or erythritol; or the pure esters of drying or semi-drying oil fatty acids such as linoleic, oleic, linolenic, ricinoleic or elaeosteric acid with such polyhydric alcohols. The film-forming compositions may also be prepared from drying or semi-drying oil-modified resins such as modified alkyd resins prepared by the esterification of glycerol, phthalic anhydride and drying or semi-drying oil fatty acids; modified phenolic resins prepared by the reaction of cresols, formaldehyde and drying or semidrying oils; modified esters of rosin or of modified (hydrogenated, isomerized and polymeriized) rosins prepared by the esterification of rosin or modified rosin, glycerol or pentaerythritol and drying or semi-drying oil fatty acids. The compositions may also include, if desired, pigments (e.g. titanium dioxide, calcium sulphate, zinc oxide, carbon black, chrome green and iron oxide), resins (e.g. para-tertiary butyl-or amyl-phenolformaldehyde, urea formaldehyde, rosin, copal, kauri, congo, manila or dammar) solvents (e.g. butyl alcohol, toluene, turpentine or xylene), thinners such as mineral spirits, and driers (e.g. lead, cobalt or manganese naphthenate, oleate or octoate). Examples which are given all relate to phenolic-tun oilg varnishes containing from 0.1 to 0.4 per cent of unsymmetrical dimethylhydrazine.
摘要:
A clear homogenous, efficient, MEKO-free anti-skinning composition, for use in alkyd-based coating materials containing metal carboxylate driers, contains a mixture of cyclohexanone oxime and/or a petroleum distillate soluble zinc carboxylate dissolved in methyl propyl ketoxmine.