A porous metallic coating is provided. The coating is characterized by a combination of optimized properties that improve coating performance, as measured by heat transfer efficiency. The porous coating has optimal ranges for properties such as porosity, particle size and thickness, and has particular applicability in boiling heat transfer applications as part of an air separations unit. The porous coatings are derived from slurry-based formulations that include a mixture of metallic particles, a binder and a solvent.

A composition for preparing an optical functional layer capable of forming an optical film having an excellent surface condition and excellent lamination properties with another layer, includes a liquid crystal compound and a copolymer, and the copolymer includes a constitutional unit corresponding to a fluoroaliphatic group-containing monomer represented by Formula I, and a constitutional unit corresponding to a monomer represented by Formula II. In Formulae I and II, R.sup.1, R.sup.10, and R.sup.3 each independently represent a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, R.sup.2 represents an alkyl group having 1 to 20 carbon atoms in which at least one carbon atom has a fluorine atom as a substituent, and L represents a divalent linking group constituted by at least one selected from the group consisting of O, (CO)O, O(CO), a divalent chain group, and a divalent aliphatic cyclic group.

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A porous metallic coating is provided. The coating is characterized by a combination of optimized properties that improve coating performance, as measured by heat transfer efficiency. The porous coating has optimal ranges for properties such as porosity, particle size and thickness, and has particular applicability in boiling heat transfer applications as part of an air separations unit. The porous coatings are derived from slurry-based formulations that include a mixture of metallic particles, a binder and a solvent.

A porous metallic coating is provided. The coating is characterized by a combination of optimized properties that improve coating performance, as measured by heat transfer efficiency. The porous coating has optimal ranges for properties such as porosity, particle size and thickness, and has particular applicability in boiling heat transfer applications as part of an air separations unit. The porous coatings are derived from slurry-based formulations that include a mixture of metallic particles, a binder and a solvent.

The present invention relates to aqueous dispersions or polymer powders which are redispersible in water, based on a) 2-ethylhexylacrylate, b) n-butylacrylate, c) one or more ethylenically unsaturated monomers, the homopolymer of which has a glass transition temperature Tg of 50 C., d) optionally one or more ethylenically unsaturated monomers containing acid groups, e) optionally one or more ethylenically unsaturated monomers containing silane groups and f) optionally one or more additional ethylenically unsaturated monomers which are different to the aforementioned monomers, characterised in that the polymers are based on 2-ethylhexylacrylate from 60 to 99 wt % and on n-butylacrylate from 1 to 40 wt %, each relative to the total weight of ethylhexylacrylate a) and n-butylacrylate b).

The present invention relates to aqueous dispersions or polymer powders which are redispersible in water, based on a) 2-ethylhexylacrylate, b) n-butylacrylate, c) one or more ethylenically unsaturated monomers, the homopolymer of which has a glass transition temperature Tg of 50 C., d) optionally one or more ethylenically unsaturated monomers containing acid groups, e) optionally one or more ethylenically unsaturated monomers containing silane groups and f) optionally one or more additional ethylenically unsaturated monomers which are different to the aforementioned monomers, characterised in that the polymers are based on 2-ethylhexylacrylate from 60 to 99 wt % and on n-butylacrylate from 1 to 40 wt %, each relative to the total weight of ethylhexylacrylate a) and n-butylacrylate b).

The purpose of the disclosure is to provide a modified polyvinyl alcohol resin composition having high gas barrier properties as well as excellent flexibility, adhesiveness and fatigue resistance. The modified polyvinyl alcohol resin composition includes: a modified polyvinyl alcohol resin obtainable by introducing a linear chain, alicyclic, branched or aromatic functional group having 3 to 20 carbon atoms, as a graft chain, into a polyvinyl alcohol as a main chain; and silica.

The purpose of the disclosure is to provide a modified polyvinyl alcohol resin composition having high gas barrier properties as well as excellent flexibility, adhesiveness and fatigue resistance. The modified polyvinyl alcohol resin composition includes: a modified polyvinyl alcohol resin obtainable by introducing a linear chain, alicyclic, branched or aromatic functional group having 3 to 20 carbon atoms, as a graft chain, into a polyvinyl alcohol as a main chain; and silica.

Subject-matter of the invention are processes for preparing fatty acid vinyl ester copolymers by radically initiated polymerization of a) one or more vinyl esters of carboxylic acids having 16 to 22 carbon atoms and b) one or more vinyl esters of carboxylic acids having 2 to 15 carbon atoms, with one or more vinyl esters a) and one or more vinyl esters b) being metered in during the polymerization, characterized in that during the polymerization either the metering rate of vinyl ester a) or the metering rate of vinyl ester b) is reduced and the metering rate of the other of the two vinyl esters, a) or b), is increased.

Subject-matter of the invention are processes for preparing fatty acid vinyl ester copolymers by radically initiated polymerization of a) one or more vinyl esters of carboxylic acids having 16 to 22 carbon atoms and b) one or more vinyl esters of carboxylic acids having 2 to 15 carbon atoms, with one or more vinyl esters a) and one or more vinyl esters b) being metered in during the polymerization, characterized in that during the polymerization either the metering rate of vinyl ester a) or the metering rate of vinyl ester b) is reduced and the metering rate of the other of the two vinyl esters, a) or b), is increased.