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RU2223286C1 - Modified urea-formaldehyde resin production process - Google Patents

Modified urea-formaldehyde resin production process Download PDF

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RU2223286C1
RU2223286C1 RU2002117353/04A RU2002117353A RU2223286C1 RU 2223286 C1 RU2223286 C1 RU 2223286C1 RU 2002117353/04 A RU2002117353/04 A RU 2002117353/04A RU 2002117353 A RU2002117353 A RU 2002117353A RU 2223286 C1 RU2223286 C1 RU 2223286C1
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formaldehyde
urea
resin
molar ratio
concentrate
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RU2002117353/04A
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Russian (ru)
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RU2002117353A (en
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С.В. Афанасьев
В.Н. Махлай
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ОАО "Тольяттиазот"
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Abstract

FIELD: polymer production. SUBSTANCE: resin applicable in manufacture of resin-bound chipboard, composites, and plywood glues, is prepared by condensation of formaldehyde component with a first portion of urea in presence of viscosity regulator at heating in variable-acidity medium and formaldehyde-to-urea molar ratio (1.9-2.1): 1, followed by after- condensation with additional portion urea at formaldehyde-to-urea molar ratio (1.01-1.5):1 and cooling resultant resin. As formaldehyde component, urea-formaldehyde concentrate, which is composition containing 57.0% formaldehyde, 22.8% urea, and 20.2% water is used at formaldehyde-to-urea molar ratio 1:5. Process is conducted in presence of amine modifier, in particular 10-60% as of polyamine with general formula:

Description

Текст описания в факсимильном виде (см. графическую часть)р Description text in facsimile form (see graphic part) p

Claims (1)

Способ получения модифицированной карбамидоформальдегидной смолы путем конденсации формальдегидного компонента с первой порцией карбамида в присутствии регулятора вязкости - деминерализованной воды или водного раствора метанола, при нагревании в среде с переменной кислотностью при мольном отношении формальдегида к карбамиду 1,9-2,1, с последующей доконденсацией полученного продукта с дополнительным количеством карбамида при мольном отношении формальдегида к карбамиду 1,01-1,5 и охлаждением готовой смолы, причем процесс проводят в присутствии аминного модификатора, отличающийся тем, что в качестве формальдегидного компонента используют карбамидоформальдегидный концентрат, представляющий собой композицию, содержащую 57,0 мас.% формальдегида, 22,8 мас.% карбамида и 20,2 мас.% воды при мольном отношении карбамида к формальдегиду 1:5, в качестве аминного модификатора применяют 10-60%-ный водный раствор полиамина общей формулыA method of obtaining a modified urea-formaldehyde resin by condensing a formaldehyde component with a first portion of urea in the presence of a viscosity regulator — demineralized water or an aqueous solution of methanol, when heated in a medium with variable acidity with a molar ratio of formaldehyde to urea of 1.9–2.1, followed by post-condensation of the obtained product with an additional amount of urea with a molar ratio of formaldehyde to urea 1.01-1.5 and cooling the finished resin, and the process is carried out in addition an amine modifier, characterized in that a urea-formaldehyde concentrate is used as the formaldehyde component, which is a composition containing 57.0 wt.% formaldehyde, 22.8 wt.% urea and 20.2 wt.% water with a molar ratio of urea to formaldehyde 1: 5, as an amine modifier, a 10-60% aqueous polyamine solution of the general formula is used
Figure 00000010
Figure 00000010
 где n = 0, 1;where n = 0, 1; m =1, 2;m is 1, 2; n + m =1-3,n + m = 1-3, причем модификатор вводят в один или в два приема в количестве 0,1-2,0% от массы концентрата одновременно с концентратом и 0-1,0% от массы концентрата на стадии доконденсации.moreover, the modifier is administered in one or two doses in an amount of 0.1-2.0% by weight of the concentrate simultaneously with the concentrate and 0-1.0% by weight of the concentrate at the stage of pre-condensation.
RU2002117353/04A 2002-07-01 2002-07-01 Modified urea-formaldehyde resin production process RU2223286C1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2261874C1 (en) * 2004-06-09 2005-10-10 ОАО "Тольяттиазот" Method for preparing modified carbamidoformaldehyde resin
RU2268897C1 (en) * 2004-06-09 2006-01-27 ОАО "Тольяттиазот" Method of preparing phenol-urea-furan binder
RU2441031C1 (en) * 2010-07-15 2012-01-27 Федеральное государственное образовательное учреждение высшего профессионального образования Чувашский государственный университет им. И.Н. Ульянова Method of reducing formaldehyde in urea-formaldehyde resins

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1735312A1 (en) * 1989-11-27 1992-05-23 Уральский лесотехнический институт им.Ленинского комсомола Method of modified urea-formaldehyde resin synthesis
RU2136703C1 (en) * 1997-08-29 1999-09-10 Акционерное общество "Тольяттиазот" Urea-formaldehyde resin production process
RU2160744C1 (en) * 1999-08-06 2000-12-20 Горловское открытое акционерное общество "Концерн Стирол" Method of preparing carbamidoformaldehyde resin

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1735312A1 (en) * 1989-11-27 1992-05-23 Уральский лесотехнический институт им.Ленинского комсомола Method of modified urea-formaldehyde resin synthesis
RU2136703C1 (en) * 1997-08-29 1999-09-10 Акционерное общество "Тольяттиазот" Urea-formaldehyde resin production process
RU2160744C1 (en) * 1999-08-06 2000-12-20 Горловское открытое акционерное общество "Концерн Стирол" Method of preparing carbamidoformaldehyde resin

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2261874C1 (en) * 2004-06-09 2005-10-10 ОАО "Тольяттиазот" Method for preparing modified carbamidoformaldehyde resin
RU2268897C1 (en) * 2004-06-09 2006-01-27 ОАО "Тольяттиазот" Method of preparing phenol-urea-furan binder
RU2441031C1 (en) * 2010-07-15 2012-01-27 Федеральное государственное образовательное учреждение высшего профессионального образования Чувашский государственный университет им. И.Н. Ульянова Method of reducing formaldehyde in urea-formaldehyde resins

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