Scale deposition preventing agent

Details Scale deposition preventing agent Scale deposition preventing agent

1987-05-21

1989-01-03

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From ketone or ketene reactant

526 62, 526 74, C08G 1200

Patent

active

047958006

ABSTRACT:
A process for preparing a scale deposition preventing agent of a quinone-amine compound suitable for use in a polymerization of acrylic or methacrylic acid ester monomers, which comprises (A) subjecting an aromatic quinone and an aromatic diamine to addition reaction in a solvent having a solubility parameter of 8.5 to 24.0 to give an addition product, and (B) converting the addition product into a high molecular weight compound within 24 hours after beginning the addition reaction (A) by adding an oxidizing agent to the addition reaction mixture or by subjecting the addition reaction mixture to anodic oxidation with an electrode to give a quinone-amine compound. According to the present invention, the preparation rate of the scale deposition preventing agent of the quinone-amine compound can be remarkably increased, the yield can be increased, and the obtained compound has excellent properties.

REFERENCES:
patent: 4024330 (1977-05-01), Morningstar et al.
patent: 4081248 (1978-03-01), Cohen
patent: 4517344 (1985-05-01), Mitani et al.
Chemical Abstracts vol. 89, 1978 p. 18, abstract No. 6819h, Columbus Ohio, U.S.; and JP-A-78 13 689 (Shin-Etsu Chemical Industry CO. Ltd.) 07-02-1978.

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