BG66120B1 - Method of obtaining high quality carbamide formaldehyde resins - Google Patents

Method of obtaining high quality carbamide formaldehyde resins

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Publication number
BG66120B1
BG66120B1 BG109345A BG10934505A BG66120B1 BG 66120 B1 BG66120 B1 BG 66120B1 BG 109345 A BG109345 A BG 109345A BG 10934505 A BG10934505 A BG 10934505A BG 66120 B1 BG66120 B1 BG 66120B1
Authority
BG
Bulgaria
Prior art keywords
carbamide
formaldehyde resins
content
formaldehyde
solution
Prior art date
Application number
BG109345A
Other languages
Bulgarian (bg)
Other versions
BG109345A (en
Inventor
Красимир ИВАНОВ
Original Assignee
Красимир ИВАНОВ
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.)
Filing date
Publication date
Application filed by Красимир ИВАНОВ filed Critical Красимир ИВАНОВ
Priority to BG109345A priority Critical patent/BG66120B1/en
Publication of BG109345A publication Critical patent/BG109345A/en
Publication of BG66120B1 publication Critical patent/BG66120B1/en

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Abstract

The method of obtaining high quality carbamide formaldehyde resins of the E-00, E-0, E-1, and E-2 type finds application in the woodworking industry. The carbamide formaldehyde resins obtained are characterized by low free formaldehyde content, good water solubility and high reactivity. The chipboards and plywood boards produced on the basis thereof have better physical and mechanical properties and low content of free formaldehyde, which in the E-00 type resin is below 1.0 mg/100 g product. According to the method, the feed stock for the production of carbamide formaldehyde resins is a waterformaldehyde solution with a concentration of 37% to 47%, dry carbamide, dry carbamide and/or carbamide solution with a concentration of 70% to 80%, or pre-condensate with 40% to 60% common formaldehyde content and 20% to 25% common carbamide content. For regulating the pH of the reaction medium, solution is used of NaOH, ammonia water, urotropin, or a mixture thereof, and borax is used for stabilizing the resin. The polycondensation process is three-staged
BG109345A 2005-11-11 2005-11-11 Method of obtaining high quality carbamide formaldehyde resins BG66120B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BG109345A BG66120B1 (en) 2005-11-11 2005-11-11 Method of obtaining high quality carbamide formaldehyde resins

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BG109345A BG66120B1 (en) 2005-11-11 2005-11-11 Method of obtaining high quality carbamide formaldehyde resins

Publications (2)

Publication Number Publication Date
BG109345A BG109345A (en) 2007-05-31
BG66120B1 true BG66120B1 (en) 2011-05-31

Family

ID=38229623

Family Applications (1)

Application Number Title Priority Date Filing Date
BG109345A BG66120B1 (en) 2005-11-11 2005-11-11 Method of obtaining high quality carbamide formaldehyde resins

Country Status (1)

Country Link
BG (1) BG66120B1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5034500A (en) * 1987-12-23 1991-07-23 Norsolor (Orkem Group) Process for the manufacture of urea-formaldehyde resins
RU2050372C1 (en) * 1992-12-08 1995-12-20 Индивидуальное частное предприятие "Огузпласт" Method of synthesis of carbamidoformaldehyde oligomeric additive to carbamide resins
RU94039237A (en) * 1994-10-18 1996-08-10 Научно-технологическое предприятие "Лиганд" Method of producing urea-formaldehyde resin
RU2114130C1 (en) * 1996-06-05 1998-06-27 Глухих Виктор Владимирович Method of carbamidoformaldehyde resin (variants)
RU2161165C2 (en) * 1999-02-09 2000-12-27 Открытое акционерное общество "Акрон" Method of preparing carbamido and/or melaminoformaldehyde resins

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5034500A (en) * 1987-12-23 1991-07-23 Norsolor (Orkem Group) Process for the manufacture of urea-formaldehyde resins
RU2050372C1 (en) * 1992-12-08 1995-12-20 Индивидуальное частное предприятие "Огузпласт" Method of synthesis of carbamidoformaldehyde oligomeric additive to carbamide resins
RU94039237A (en) * 1994-10-18 1996-08-10 Научно-технологическое предприятие "Лиганд" Method of producing urea-formaldehyde resin
RU2114130C1 (en) * 1996-06-05 1998-06-27 Глухих Виктор Владимирович Method of carbamidoformaldehyde resin (variants)
RU2161165C2 (en) * 1999-02-09 2000-12-27 Открытое акционерное общество "Акрон" Method of preparing carbamido and/or melaminoformaldehyde resins

Also Published As

Publication number Publication date
BG109345A (en) 2007-05-31

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