METHOD OF PREPARING AMMONIUM SALT OF MALEIC ANHYDRIDE-STYRENE COPOLYMER HEMIAMIDE SPARSELY CROSS-LINKED WITH ETHYLENE GLYCOL Russian patent published in 1998 - IPC

Abstract RU 2119501 C1

FIELD: polymer production. SUBSTANCE: product, applicable to prepare pesticides as well as cosmetic, pharmacological and veterinary means, is prepared by interaction of maleic anhydride with styrene in presence of benzoyl peroxide followed by cross-linking resultant copolymer with ethylene glycol, polymerization and cross-linking being performed in one step owing to simultaneously charging into reactor maleic anhydride, styrene, ethylene glycol, and benzoyl peroxide at ethylene glycol to maleic anhydride molar ratio (0.03- 0.10):1. After that, cross-linked copolymer obtained is treated with ammonia gas. Final ammonium salt is adequate to form aqueous gels with desired viscosity needed to prepare gel-like preparation forms. EFFECT: improved specific properties of product. 6 ex

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RU 2 119 501 C1

Authors

Zheltova E.V.

Kostenko S.V.

Karakotov S.D.

Ivchenko A.M.

Lepljanin G.V.

Dates

1998-09-27—Published

1997-03-18—Filed