Mitsubishi Rayon Company, Limited

Haruki Sato

Fumio Suzuki

Hideaki Habara

Shigeho Tanaka

Yutaro Fukuda

Tohru Endoh

Noriyuki Tajiri

Teruhiko Sugimori

Masaki Sugihara

Wataru Hadano

Hiromasa Inada

Toshihiro Sato

Kazutaka Inoue

Kazunori Matake

Akinobu Sasaki

Nobuyuki Kikuya

Disclosed is a method for extracting methacrylic acid, in which an extraction solvent is added to a methacrylic acid aqueous solution for transferring methacrylic acid to the extraction solvent. In this method, a solvent containing t-butyl methacrylate is used as the extraction solvent.

Method for extracting methacrylic acid

Disclosed is a method for synthesizing t-butyl (meth)acrylate at low cost. Specifically, disclosed is a method for synthesizing a carboxylic acid ester by performing an addition reaction between isobutylene and (meth)acrylic acid in the presence of an acidic catalyst. This method includes the steps of:

Method for synthesizing t-butyl (meth)Acrylate

Disclosed is a method for producing tertiary butyl alcohol through hydration reaction of isobutylene and water in the presence of a cation exchange resin by using a reactor having at least two reactor vessels provided in series. The method is characterized in that a fluid in a reactor vessel at the most downstream side forms a two-liquid phase and the reaction temperature of the reactor vessel is kept at 70&#xb0; C. or lower, and a fluid in at least one reactor vessel other than the one at the most downstream side forms a homogeneous phase.

Method for producing tertiary butyl alcohol

In order to easily and effectively polymerize an organosiloxane and produce a polyorganosiloxane latex from which the organosiloxane monomer does not emerge and which has a weight-average diameter controlled to under 0.4 &mgr;m, a paste is polymerized which contains at least a cyclic organosiloxane, a surface active agent, an initiator, and water, and which is an emulsified dispersion of the cyclic organosiloxane, in which the water content is in a proportion of 1 to 66 parts by weight with respect to 100 parts by weight of the cyclic organosiloxane. A latex obtained by diluting the thus-obtained polymerized paste has excellent liquid stability. The above paste, which is an emulsified dispersion of the cyclic organosiloxane, can be produced by mixing the organosiloxane, the surface active agent, the initiator, and the water together in an emulsifying and dispersing machine, and dispersing therein.

Process for producing polyorganosiloxane latex

Process for producing thermoplastic copolymer powder

A method for producing a powdery and granular polymer by two coagulation steps comprising coagulating a latex of the polymer, the latex containing a sulfuric acid ester series and/or sulfonic acid series anionic surface active agents, with an acid to an amount of the polymer of 40 to 80 wt. % at a first coagulation step, and then bringing coagulation to completion with an acid or salt at a second coagulation step. According to the present invention, a powdery and granular polymer having a sharp particle size distribution and a high bulk specific gravity can be obtained.

Method for producing powdery and granular polymers

The invention discloses a process for the production of a particulate polymer which contains few fine particles and has a narrow particle size distribution and a controlled bulk specific gravity. Characteristic features of the process of this invention reside in that a polymer latex obtained by emulsion polymerization is successively processed through the following steps (I) and (II):

Continuous production process of particulate polymer and control method

Disclosed is method for producing a rubber modified thermoplastic reins which comprises carrying out all or a part of the following setps (I) - (VI):

Method for producing rubber modified thermoplastic resins

Disclosed is a method for producing a rubber modified thermoplastic resin which comprises carrying out all or a part of the following steps (I)-(VI):

Growing community of inventors

Hatsukaichi, Japan

Haruki Sato