Maruzen Petrochemical Company, Limited

Norihiro Yoshida

Shinji Sugihara

Takahito Mita

Takashi Takahashi

Masahiro Endo

Kazuhiko Haba

Goro Sawada

Keisuke Matsushita

Takao Nishiura

Eiichi Ikawa

Hijiri Aoki

Masaki Sugiyama

Ami Yamaguchi

[Object] To provide a method for producing a vinyl ether polymer having a hydroxyl group on the side chain, wherein the vinyl ether polymer having a low viscosity and excellent workability and processability is produced in a simple and efficient method. [Means for solving problem] The present invention relates to a method for producing a vinyl ether polymer having a hydroxyl group on the side chain, characterized in that vinyl ether comprising a hydroxyl group is subjected to radical polymerization by using an oil-soluble azo polymerization initiator, in the presence of a mixed solvent comprising water and an organic solvent selected from alcohol or cyclic ether radical polymerization.

Method for producing vinyl ether polymer having hydroxyl group on side chain and temperature-responsive polymer mixture

A method for producing a hydroxyl group-containing vinyl ether polymer according to the present invention includes: a step of radical polymerizing at least one vinyl ether selected from vinyl ether having a hydroxyl group represented by the following formula (2):  wherein Rrepresents an alkylene group which is straight-chained, branched or comprises an alicyclic structure, and p is 1, 2, or 3, in the presence of water as a polymerization solvent and an azo compound represented by the following formula (1) as a polymerization initiator:  wherein Rto Reach independently represent a hydrogen atom or an alkyl group and Rand Reach independently represent an alkoxy group optionally having a substituent group or an alkyl amino group optionally having a substituent group.

Method for producing hydroxyl group-containing vinyl ether polymer

A method for producing poly(dimethyl vinylphosphonate) from a monomer component mainly containing dimethyl vinylphosphonate by anionic polymerization in the presence of an anionic polymerization initiator, the method being characterized in that an aliphatic ether is used as a polymerization solvent, and a method for producing poly(vinylphosphonic acid) characterized in that the poly(dimethyl vinylphosphonate) obtained by the former method is hydrolyzed in the presence of an acid are provided. The methods make it possible to easily produce a poly(dimethyl vinylphosphonate) which has a high molecular weight and in which the molecular weight is controlled, and make it possible to produce a poly(vinylphosphonic acid) which has a high molecular weight and in which the molecular weight is controlled corresponding to the poly(dimethyl vinylphosphonate).

Method for producing dimethyl polyvinylphosphonate and polyvinylphosphonic acid

A star-shaped vinyl ether polymer, comprising a central core and an arm portion bonded to the central core, wherein: the arm portion comprises a repeating unit derived from a vinyl ether monomer; the star-shaped vinyl ether polymer comprises a structure represented by the following Formula (1):&#x2014;Y&#x2014;Ar&#x2014;N&#x2550;N&#x2014;Ar&#x2003;&#x2003;(1); 

Star-shaped vinyl ether polymer

Provided are a metal nanoparticle composite which exhibits excellent stability over time and retention stability and is useful as a raw material for a metal nanoparticle-dispersed film, a method for producing the composite, a metal nanoparticle dispersion liquid, a composition for forming a metal nanoparticle-dispersed film, and a metal nanoparticle-dispersed film. Disclosed is a metal nanoparticle composite comprising (A) a star-shaped polymer having a central core and arms bonded to the central core, the arms comprising a repeating unit represented by the following formula (1) and a repeating unit represented by the following formula (2); and (B) metal nanoparticles supported thereon: wherein in the formula (1), Rrepresents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; and in the formula (2), Rrepresents a methyl group or an ethyl group; and k represents an integer from 1 to 10. 

Metal nanoparticle composite and method for producing the same

To provide a novel ABA-type triblock copolymer of vinyl ether series, comprising polyvinyl ether and an oxystyrene-series unit, and a process of producing the ABA-type copolymer at a series of steps. The invention relates to a novel ABA-type triblock copolymer comprising Segment A comprising an oxystyrene-series repeat unit (a) and Segment B comprising a vinyl ether-series repeat unit (b), in which the Segment A and the Segment B are bonded together with a single bond, and to a simple process of producing the same. The triblock copolymer can be produced at a series of steps in a simple manner, comprising living cationic polymerization of a vinyl ether-series monomer such as ethyl vinyl ether in the presence of a bifunctional initiator and a Lewis acid, and subsequently adding an oxystyrene-series monomer such as p-hydroxystyrene for living cationic polymerization.

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Ichihara, Japan

Norihiro Yoshida