公开(公告)号：US20220332874A1

公开(公告)日：2022-10-20

申请号：US17639555

申请日：2020-09-01

Applicant: MARUZEN PETROCHEMICAL CO., LTD.

Inventor： Shinji SUGIHARA ,  Masahiro ENDO

IPC: C08F275/00

Abstract: A core-shell type polymeric particle may exhibit good dispersibility in an aqueous medium and excellent flame retardance. A core-shell type polymeric particle may include a core including a hydrophobic polymer (c) and a shell including a copolymer having a repeating unit (a) derived from vinyl phosphonic acid or a vinyl phosphonic acid ester and a repeating unit (b) of formula (α): wherein Ra is H or a methyl group, Rb is a single bond or a carbonyl group, and ring Q1 is a substituted or unsubstituted 4 to 10 membered nitrogen-containing heterocycle.

公开(公告)号：US20210122847A1

公开(公告)日：2021-04-29

申请号：US17257664

申请日：2019-06-14

Applicant: MARUZEN PETROCHEMICAL CO., LTD.

Inventor： Shinji SUGIHARA ,  Masahiro ENDO

IPC: C08F16/18 ,  C08F16/22 ,  C08F2/10 ,  C08F4/04 ,  C08K3/22 ,  C08K5/17

Abstract: [Object] To provide a method for producing a vinyl ether polymer containing a hydrocarbon group in a stable and efficient manner, wherein decomposition of the monomer and generation of polyacetal are suppressed.
[Means for solving problem] The method for producing a vinyl ether polymer containing a hydrocarbon group according to the present invention comprises the step of polymerizing vinyl ether represented by the following formula (1): wherein R1 represents an aliphatic hydrocarbon group having 1 to 10 carbons or an alicyclic hydrocarbon group having 3 to 10 carbons, in the presence of water as a polymerization solvent and an organic azo-based compound as a radical polymerization initiator, under pH of 6 or more.

公开(公告)号：US20220306788A1

公开(公告)日：2022-09-29

申请号：US17414693

申请日：2019-12-16

Applicant: MARUZEN PETROCHEMICAL CO., LTD.

Inventor： Tadashi YAMAZAKI ,  Masahiro ENDO

IPC: C08F230/02 ,  C08F4/04

Abstract: A method for producing a polyvinylphosphonic acid copolymer may control a rise in internal temperature in the reaction system during polymerization and may allow synthesis of a copolymer as a polymer solution. A method for producing a polyvinylphosphonic acid copolymer may include polymerizing a compound of formula (1) and a compound of formula (2) in presence of a radical polymerization initiator and in a water-containing solvent: wherein R1 and R2 are independently —OH, —O−, or —O−M+(M+ being a counter ion), R3 is —OH, —O−, —O−M+, or an optionally substituted alkoxy group having 1 to 10 carbon atoms (M+ being a counter ion), and R4 is an optionally substituted alkoxy group having 1 to 10 carbon atoms, R3 and R4 optionally forming a ring together with an adjacent phosphorus atom when both R3 and R4 are alkoxy groups.

公开(公告)号：US20170198073A1

公开(公告)日：2017-07-13

申请号：US15315588

申请日：2015-06-01

Applicant: MARUZEN PETROCHEMICAL CO., LTD.

Inventor： Takashi TAKAHASHI ,  Keisuke MATSUSHITA ,  Masaki SUGIYAMA ,  Norihiro YOSHIDA ,  Eiichi IKAWA ,  Takahito MITA ,  Masahiro ENDO

IPC: C08F130/02 ,  C08F8/12

CPC classification number: C08F130/02 ,  C08F2/06 ,  C08F2/38 ,  C08F8/12

Abstract: 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).