SU692838A1 - Method of preparing resorcin-urea formaldehyde resins - Google Patents
Method of preparing resorcin-urea formaldehyde resinsInfo
- Publication number
- SU692838A1 SU692838A1 SU782580512A SU2580512A SU692838A1 SU 692838 A1 SU692838 A1 SU 692838A1 SU 782580512 A SU782580512 A SU 782580512A SU 2580512 A SU2580512 A SU 2580512A SU 692838 A1 SU692838 A1 SU 692838A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- resin
- urea
- resorcinol
- viability
- added
- Prior art date
Links
Description
(54) СПОСОБ ПОЛУЧЕНИЯ РЕЗОРЦИНОМОЧЕВИНОФОРМАЛЬДЕГИШЫХ(54) METHOD FOR OBTAINING RESORRIC AND MORNE-FORMEDEGIC
. СМОЛ. RESIN
Изобретение относитс к способам получени резорциновых смол, которые могут найти применение в различных област х техники как клей, св зующие дл слоистых пластиков, например , дл склеирани древесины.The invention relates to methods for producing resorcinol resins, which can be used in various fields of technology as adhesives, binders for laminated plastics, for example, for gluing wood.
Известны различные способы получени клеевых резорциновых смол как на основе чистого резорцина, так и алкилрезорцинов. Напримф , известен способ получени резорцйноформальдегидной смолы, по которому сначала резорцин подвергают взаимодействию с капролактамом , а затем полученный комплекс взаимодействует с формальдегидом, что позвол ет получить клеевую смолу, достаточно стабильную при хранении 1.Various methods are known for producing adhesive resorcinol resins based on pure resorcinol and alkylresorcinol. For example, there is a known method for producing resorption-formaldehyde resin, by which first resorcinol is reacted with caprolactam, and then the resulting complex is reacted with formaldehyde, which makes it possible to obtain an adhesive resin that is sufficiently stable during storage 1.
Однако при отверждении клеевой композиции капролактам не вступает в реакцию, а наличие неотвержденного продукта снижает прочность клеевого, соединени .However, when the adhesive composition is cured, caprolactam does not react, and the presence of uncured product reduces the strength of the adhesive compound.
Наиболее близким к предлагаемому способу по технической сущности вл етс способ получени отверждаемых мочевиноформальдегидных смол с остатками резорцина, по которому мочевину и формальдегид конденсируют по мочевиноформальдегидной смолы с последующим введением в нее резорцина 2. Отверждают реакцией с формальдегидом (параформом). Получаема смола стабильна при хранении в течение 3 мес цев, обеспечивает достаточно высокую прочность клеевого соединени .The closest to the proposed method according to the technical essence is the method of obtaining curable urea-formaldehyde resins with resorcinol residues, in which urea and formaldehyde are condensed in a urea-formaldehyde resin, followed by the introduction of resorcin 2 into it. It is cured by reaction with formaldehyde (paraform). The resulting resin is stable when stored for 3 months, provides a sufficiently high strength of adhesive bonding.
Однако жизнеспособность на основе этой смолы недостаточна (в пределах 1ч), что не позвол ет примен ть ее дл склеивани крупногг1бариТных изделий и деталей.However, viability on the basis of this resin is insufficient (within 1 hour), which makes it impossible to use it for gluing large-sized products and parts.
Целью изобретени вл етс получение клеевой -смолы на основе резорцина, формальдегида И мочевины с достатошой жизнеспособностью и хорошими прочностными свойствами.The aim of the invention is to obtain adhesive resins based on resorcinol, formaldehyde, and urea with sufficient viability and good strength properties.
Поставленна цель достигаетс тем, что поликонденсацию резорцина (алкилрезорцинов), мочевины и формальдегида ведут в щелочной среде при 40-70°С, а мочевину ввод т в количестве 5-20 вес.ч. на 100 вес.ч. резорцинового сырь .The goal is achieved by the fact that the polycondensation of resorcinol (alkylresorcinol), urea and formaldehyde is carried out in an alkaline medium at 40-70 ° C, and urea is introduced in an amount of 5-20 parts by weight. per 100 weight parts resorcin raw materials.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782580512A SU692838A1 (en) | 1978-02-15 | 1978-02-15 | Method of preparing resorcin-urea formaldehyde resins |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782580512A SU692838A1 (en) | 1978-02-15 | 1978-02-15 | Method of preparing resorcin-urea formaldehyde resins |
Publications (1)
Publication Number | Publication Date |
---|---|
SU692838A1 true SU692838A1 (en) | 1979-10-25 |
Family
ID=20749238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU782580512A SU692838A1 (en) | 1978-02-15 | 1978-02-15 | Method of preparing resorcin-urea formaldehyde resins |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU692838A1 (en) |
-
1978
- 1978-02-15 SU SU782580512A patent/SU692838A1/en active
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