Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
MANUFACTURE OF MALEIC ANHYDRIDE COPOLYMER PARTICLE
Document Type and Number:
Japanese Patent JPH01204912
Kind Code:
A
Abstract:

PURPOSE: To produce the subject particles which are useful as an emulsifying agent, a slow release agent composition, a cement admixture, etc. easily in a high yield, by subjecting maleic anhydride and a vinyl monomer to radical polymerization in a specific solvent in the presence of a tertiary amine compound.

CONSTITUTION: Maleic anhydride (A) and a vinyl monomer (B) copolymerizable with the component (A) selected from the group consisting of 2W22C olefins, styrene monomers, vinyl ethers of 1W22C alkyls, vinyl esters of 2W22C aliphatic carboxylic acids, etc., are subjected to radical copolymerization in a solvent (D) which dissolves the above monomer but does not dissolve the copolymer that will be produced in such an amount that the concentration of the copolymer that will be produced is 5W35wt.% at 30W150°C, with the molar ratio of A to B being 1/2W2/1, in the presence of a tertiary amine compound (C) of the given formula [wherein R1W3 is 8W22C linear or branched higher alkyl or alkenyl, 8W22C higher hydroxy-alkyl or -alkenyl, 1W2C lower (hydroxy)alkyl, or benzyl] in an amount of 0.05W20pts.wt. for 100pts.wt. of the component (A), thereby producing the title particles of which particle distribution is monodisperse and which will not form any aggregate and has a particle diameter of 10μm or below.


Inventors:
OTANI SHOJI
MUROI YOSHIYUKI
FUKUDA MASAHIRO
TSUSHIMA RIKIO
Application Number:
JP3050888A
Publication Date:
August 17, 1989
Filing Date:
February 12, 1988
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
KAO CORP
International Classes:
C08F2/06; C08F2/04; C08F20/02; C08F26/00; C08F222/06; C08F226/02; (IPC1-7): C08F2/06; C08F222/06; C08F226/02
Attorney, Agent or Firm:
Furuya Kaoru