PL133687B1 - Method of manufacture of urea adhesive - Google Patents

Method of manufacture of urea adhesive Download PDF

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Publication number
PL133687B1
PL133687B1 PL23488482A PL23488482A PL133687B1 PL 133687 B1 PL133687 B1 PL 133687B1 PL 23488482 A PL23488482 A PL 23488482A PL 23488482 A PL23488482 A PL 23488482A PL 133687 B1 PL133687 B1 PL 133687B1
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PL
Poland
Prior art keywords
urea
formaldehyde
methanol
etherified
manufacture
Prior art date
Application number
PL23488482A
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Polish (pl)
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PL234884A1 (en
Inventor
Dominik Nowak
Jan Gniady
Renata Kubica
Gertruda Staniec
Bozena Jerzykiewicz
Brygida Nowicka
Original Assignee
Inst Ciezkiej Syntezy Orga
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Inst Ciezkiej Syntezy Orga filed Critical Inst Ciezkiej Syntezy Orga
Priority to PL23488482A priority Critical patent/PL133687B1/en
Publication of PL234884A1 publication Critical patent/PL234884A1/en
Publication of PL133687B1 publication Critical patent/PL133687B1/en

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Claims (4)

Zastrzezenia patentowe 1. Sposób wytwarzania kleju mocznikowego z formaldehydu i mocznika, znamienny tym, ze eteryfikowany metanolem kondensat mocznikowo-formaldehydowy poddaje sie polikon¬ densacji w srodowisku kwasnym w temperaturze 336-363 Kj po czym alkalizuje sie i wprowadza mocznik w takiej ilosci, by laczny stosunek mocznika do formaldehydu wynosil 1:1,4-1,6, po czym zateza produkt do zadanego stezenia i ewentualnie wprowadza weglan amonu lub amoniak w ilosci ponizej 1# w stosunku do masy produktu.Claims 1. The method of producing urea glue from formaldehyde and urea, characterized in that urea-formaldehyde condensate etherified with methanol is subjected to polycondensation in an acidic environment at a temperature of 336-363 Kj, then it is made alkaline and introduces urea in such an amount as the urea to formaldehyde ratio was 1: 1.4-1.6, after which it concentrated the product to the desired concentration and optionally introduces ammonium carbonate or ammonia in an amount below 1% based on the weight of the product. 2. Sposób wedlug zastrz. 1, znamienny tym, ze na kazde 100 g eteryfiko- wanego metanolem 47-55$ roztworu wodno-metanolowego kondensatu mocznika z formaldehydem sto¬ suje sie 10-14 czesci wagowych mocznika.2. The method according to claim The process of claim 1, wherein 10-14 parts by weight of urea are used for each 100 g of methanol etherified 47-55% solution of a water-methanolic urea-formaldehyde condensate. 3. Sposób wedlug zastrz. 1, znamienny tym, ze stosuje sie 47-55$ meta- nolowo-wodny roztwór eteryfikowanego w srodowisku kwasnym przy pH=2,4 5-10 molami metanolu kondensatu otrzymanego z 1 mola mocznika z 2-2,6 molami formaldehydu.3. The method according to p. The process of claim 1, characterized in that a 47-55% methanol-aqueous solution of an etherified in acidic environment is used at pH = 2.4 with 5-10 moles of methanol of a condensate obtained from 1 mole of urea with 2-2.6 moles of formaldehyde. 4. Sposób wedlug zastrz. 1, znamienny tym, ze pH reakcji wynoai 3,5-5,Oj przy czasie reakcji 20-60 minut w temperaturze 338-363 K. PL4. The method according to p. 1, characterized in that the reaction pH is 3.5-5.0 for the reaction time of 20-60 minutes at the temperature of 338-363 K. PL
PL23488482A 1982-01-28 1982-01-28 Method of manufacture of urea adhesive PL133687B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL23488482A PL133687B1 (en) 1982-01-28 1982-01-28 Method of manufacture of urea adhesive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL23488482A PL133687B1 (en) 1982-01-28 1982-01-28 Method of manufacture of urea adhesive

Publications (2)

Publication Number Publication Date
PL234884A1 PL234884A1 (en) 1983-08-01
PL133687B1 true PL133687B1 (en) 1985-06-29

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Family Applications (1)

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PL23488482A PL133687B1 (en) 1982-01-28 1982-01-28 Method of manufacture of urea adhesive

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PL (1) PL133687B1 (en)

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Publication number Publication date
PL234884A1 (en) 1983-08-01

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