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2 213 749

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IPC

(21) (22)

Application

2002100631/04, 2002-01-16

(24)

Start date

2002-01-16

(22)

Actual filing date

2002-01-16

(45)

Published

2003-10-10

(72)

Inventor

Afanas'Ev S.V.Makhlaj V.N.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo

UREA-FORMALDEHYDE RESIN PRODUCTION PROCESS Russian patent published in 2003 - IPC

Abstract RU 2213749 C1

FIELD: polymer production. SUBSTANCE: urea-formaldehyde concentrate is subjected to condensation with first portion of urea in presence of viscosity- control agent followed by heating variable-acidity aqueous solution and reaction of intermediate with additional amount of urea in presence of buffering additive, after which resulting resin is cooled. EFFECT: intensified polycondensation reaction. 2 cl, 1 tbl

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RU 2 213 749 C1

Authors

Afanas'Ev S.V.

Makhlaj V.N.

Dates

2003-10-10—Published

2002-01-16—Filed

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