CS237964B1 - Method of adhesive production on base of urea-formaldehyde resins - Google Patents

Method of adhesive production on base of urea-formaldehyde resins Download PDF

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Publication number
CS237964B1
CS237964B1 CS815971A CS597181A CS237964B1 CS 237964 B1 CS237964 B1 CS 237964B1 CS 815971 A CS815971 A CS 815971A CS 597181 A CS597181 A CS 597181A CS 237964 B1 CS237964 B1 CS 237964B1
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CS
Czechoslovakia
Prior art keywords
urea
formaldehyde
molar ratio
resin based
intermediate product
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CS815971A
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Czech (cs)
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CS597181A1 (en
Inventor
Joachim Barse
Henry Drechsel
Gerhard Esser
Gerhard Findeisen
Lothar Hammer
Gerhard Kunath
Lisa Mittagova
Heinz Mueller
Reiner Neumann
Kurt Oehler
Konrad Peinze
Annelies Petzova
Gudrun Raueova
Ulrich Steinke
Katerina Ulrichova
Harald Winter
Original Assignee
Joachim Barse
Henry Drechsel
Gerhard Esser
Gerhard Findeisen
Lothar Hammer
Gerhard Kunath
Lisa Mittagova
Heinz Mueller
Reiner Neumann
Kurt Oehler
Konrad Peinze
Annelies Petzova
Gudrun Raueova
Ulrich Steinke
Katerina Ulrichova
Harald Winter
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Application filed by Joachim Barse, Henry Drechsel, Gerhard Esser, Gerhard Findeisen, Lothar Hammer, Gerhard Kunath, Lisa Mittagova, Heinz Mueller, Reiner Neumann, Kurt Oehler, Konrad Peinze, Annelies Petzova, Gudrun Raueova, Ulrich Steinke, Katerina Ulrichova, Harald Winter filed Critical Joachim Barse
Publication of CS597181A1 publication Critical patent/CS597181A1/en
Publication of CS237964B1 publication Critical patent/CS237964B1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J161/00—Adhesives based on condensation polymers of aldehydes or ketones; Adhesives based on derivatives of such polymers
    • C09J161/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C09J161/22—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
    • C09J161/24—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with urea or thiourea
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
    • C08G12/04—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
    • C08G12/10—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with acyclic compounds having the moiety X=C(—N<)2 in which X is O, S or —N
    • C08G12/12—Ureas; Thioureas
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00—Compositions of lignin-containing materials
    • C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
    • C08L61/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08L61/22—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
    • C08L61/24—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with urea or thiourea

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Phenolic Resins Or Amino Resins (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

1. Method for preparing urea-formaldehyde resin based adhesives for gaining wood material having an extremely low formaldehyde emission, by an intermediate product forming condensation of urea and formaldehyde in the molar ratio of 1:1,8 to 1:2,1 at temperatures of 373 to 414 degrees K and conversion of these condensates, in manner known per se, into adhesive resins, characterized in that one condenses urea and formaldehyde in aqueous solution in presence of 0,05 to 0,5% organic or anorganic acids, related to the amount of urea used, in maintaining a carbon dioxide pressure of 2 to 4.10**5 Pa that long until at least 40% of the formaldehyde used is bound in form of methylene bridges, and one further condenses this intermediate product in the neutral or low alkalic range after addition of urea up to a molar ratio of urea related to formaldehyde of 1:0,9 to 1:1,3 and, if desired, concentrates simultaneously.

Description

11

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H, HaKOHep, ηθβθοτηο, at BWfleHiie αποπολογική Bxeriixa hs CTpyaeAHHxiuiht yMeHBiuaeTCH τθμ, at γοτοβηθ cTpyseAHHe iuihth npa TeMnepa-Type 313 - 373 K βπητηβθιοτ θμμηθκ. TβτζοοτπτκοΜnpil 3TOM ΑΒΛΑΘΤΟΑ TO, ΑΤΟ πρίί Η3Γ0Τ0ΒΛΘΗΗΗ CTpyaeAHHX IUIHT B03HH · KaeT HeOtíXO.WOCTB B. £ ΟΠΟΛΗΚΤΘΛΒΗΟΗ ΤΘΧΗ0Λ0ΓΗΑ80Κ0Η GTyneHH, CBA3aHH0H.C ΤΘΧΗΗΑΘΟΚΗΜΗ 3aTpaTai.WI I-í, Π, ΟΠΟΛΗΗΤΘΛΒΗΗΜΗ 3ΗΘΡΓ0-pacxošaíffl. 3 237 964 ΠθΛΒ Η300ρθΤΘΗΕΗ IJe.7IH0 H30Óp6T.6HH9 ΗΒΛΗΘΤΟΗ pa3pad0TXa ΠρΟΟΤΟΓΟ MeTOfla ΠΟ- "ΚΠθΗ ΜΟΗΘΒΕΗΟ- φορΜΘΛΒΛΘΓΗΛΗΟΜ CMOJIH OdjiaflaiOInefl xopoiuHMH MexaHHHecKHMH κηηθοτβομη e BWJMiomeíí irpn odpadoTxe3ηηηιίτθλβηο MeHBiuee χολεηθοτβο φιορΜθΛΒΛθΓΗΛβ well cpaBnemnoC odOTHHME aMEHOIUiaCTEHeCKEME CBH3yW®M ΒΘΙϋβΟΤΒΘΜΕ. Μ3ΛΟ3ϊθΗΗθ CymHOCTH Η3Ο0ρβΤΘΗΗΗ

Eima nocTaBxěHa 3an,ana pa3paóoTXH MeTOsa no3BOJimomero nonyne-HE6 ΚΛΘΗ ΜΟΗθΒΗΗΟ-φορΜΘΛΒΖζβΓΗΛΗΟϋ CMOJIH C ΟΗΘΗΒ HE3XHM CO-KepjxaHHeM ^opKanBserasa.Eima nocTaBxěHa 3an, ana pa3paóoTXH MeTOsa no3BOJimomero nonyne-HE6 ΚΛΘΗ ΒΗΗΟθΒΗΗΟ-φορΜΘΛΒΖζβΓΗΛΗΟϋ CMOJIH C ΟΗΘΗΒ HE3XHM CO-KepjxaHHeM ^ opKanBserasa.

Taxan 3asana, oorjiacno Η3ο<5ρθτθηηιο, pemaeTon τθμ, hto MoneBUHa ηφορΜΘΛΒβθΓίνξ' KOHUeHTpEpyiOTOfl B BOflHOM paCTBOpe B npECyTCTBEH0,05-0,5 % opraHEraecKoS hjie HeopraramecKofi kecsoth, b pacneTe HaΒ3ΗΤ0Θ X0JHTH6CTB0 ΜΟΗβΒΙΊΗΗ, ΠρΕ ΠΟΛΛβρίΚΗΒΘΗΕΗ flaBJíeHEH SByoXHCHyraeposa 1-4«10^ Ila so Tex nop, noxa ηθ óyner socTETHyio ηθ μθηθθ40 % Β3ΧΤ0Γ0 (OOPMaJIB^erHJia CBH3aHHOrO B φορΜΘ ΜΟΟΤΗΚΟΒΟΓΟ ΜΘΤΗΕβΗΖh 3aTeM 3tot nposyKT paejioJxeHHH xoHseHCHpyeTGíi jrajiBine b HeflTpajiB-HOE ΗΛΕ CJiaÓOiiíejlOHHOM OÓJiaCTK nOCJie SOÓaBJíeHHH ΜΟΗβΒΕΗΗ -SOMOJifípHóro cooTHomeHira μοήθβεηη k cJopMaziBíterHjiy I : 0,9 -.1 : 1,3Έ npn HOOtíXOSHMOCTH ΟΛΗΟΒρθΜβΗΗΟΜ yBeJIEHeHEH ΚΟΗΗβΗΤρΗΗΕΗ.ΧορΟΗΟ,’ecjra KJien μοεθβηηο-Φορμθλβλθγηληοη cmojih ημθθτ bh3koctb 400 -1000 cnya3. OCHOBa H30dp6T6HHH COCTOET B TOM, HTOÓH OjiaTOflapH IICnOSB30BaHHIOcnemiQHHecKEx ycjioBHií peaxmíii.peryjiEpoBaTB χολ KOHseHcamin b -μολβηομ cooTHOiueHi-ni MoneBíma κ oopMajiBseriísy I : 1,8 so l : 2,1Tax, htoóh ne weHee 40 % β3ητογο ňopMajiBseriífla dtuio CBH3ano bφορΜβ ΜΟΟΤΗΚΟΒΟΓΟ ΜΘΤΙΗΙΘΗΘ.ΤΟΛΒΚΟ ΟΰρββΟΒΒΗΙάβ CMOSBHHX CTpyXTJTc cosepnaHHeM μοοτεχοβογο MeTiwieHa dosee 40 % πο3βολητ sasBiienuiyK)xoHseHcamno c mojibhhm οοοτΗουιβΗΐιθΜ μοηθβηηη x yopMajiBserHsyI : 0,9 so I : 1,3, nsderas οτρι-maTejiBHoro βλεηηεη na CBoíicTBaKJieeB.CiiepEĎHHecxEe ycsoBEfl KOHseHcamn-i b μολβηομ οοοτηοιπθηηεI : 1,8 so I : 2,1 xapaxTepH3p0TCH πρΗΜθΗθΗΗθΜ aTMocwepti sByoxncnyrjieposa πρπ saBJíeHiisx Ι-4·ΪΟό Ila n TeMnepaType 373-413 K. » f · 237964 4 B/iaroflapn KOMdHHanm τηκηχ ycjioBioí KoímeHcaUiíH c nocne-flyiomeS; KOímeHcaujieS. b μολβηομ οοοτηοιπθηηη μοηθβηηη k$opMajiBjterw I : 0,9 so l : 1,3 ηθοκεκθηηο nojiynajoT mo-HeBHHO-§OpMaiIBfleriIflHHe CMOJIH C ΟΗΘΗΒ HK3KHM BHfleJiefflíeMcJopMajiLserHfla.Taxane 3asana, oorjiacno Η3ο <5ρθτθηηιο, pemaeTon τθμ, HTO MoneBUHa ηφορΜΘΛΒβθΓίνξ 'KOHUeHTpEpyiOTOfl B BOflHOM paCTBOpe B npECyTCTBEH0,05-0,5% opraHEraecKoS hjie HeopraramecKofi kecsoth b pACN HaΒ3ΗΤ0Θ X0JHTH6CTB0 ΜΟΗβΒΙΊΗΗ, ΠρΕ ΠΟΛΛβρίΚΗΒΘΗΕΗ flaBJíeHEH SByoXHCHyraeposa 1-4 «10 ^ Ila Tex with NOP noxious ηθ óyner socTETHyio ηθ μθηθθ40% Β3ΧΤ0Γ0 (OOPMaJIB ^ erHJia CBH3aHHOrO b φορΜΘ ΜΟΟΤΗΚΟΒΟΓΟ ΜΘΤΗΕβΗΖh 3aTeM 3This nposyKT paejioJxeHHH xoHseHCHpyeTGíi jrajiBine b HeflTpajiB-HOE ΗΛΕ CJiaÓOiiíejlOHHOM OÓJiaCTK nOCJie SOÓaBJíeHHH ΜΟΗβΒΕΗΗ -SOMOJifípHóro cooTHomeHira μοήθβεηη cJopMaziBíterHjiy to I: 0.9 -. 1: 1,3Έ npn HOOtíXOSHMOCTH ΟΛΗΟΒρθΜβΗΗΟΜ yBeJIEHeHEH ΚΟΗΗβΗΤρΗΗΕΗ.ΧορΟΗΟ, 'ecjra KJien μοεθβηηο-Φορμθλβλθγηληοη cmhih ημθθτ bh3koctb 400 -1000 cnya3. nOSB30BaHHIOcnemiQHHecKEx ycjioBHií peaxmíii.peryjiEpoBaTB χολ KOHseHcamin b -μολβηομ cooTHOiueHi-ni MoneBíma κ oopMajiBseriísy I: 1.8 to I: 2,1Tax, htoóh not Wehe 40% β3ητογο ňopMajiBseriífla dtuio CBH3ano bφορΜβ ΜΟΟΤΗΚΟΒΟΓΟ ΜΘΤΙΗΙΘΗΘ.ΤΟΛΒΚΟ ΟΰρββΟΒΒΗΙάβ CMOSBHHX CTpyXTJTc cosepnaHHeM μοοτεχοβογο MeTiwieHa DOSE 40 % πο3βολητ sasBiienuiyK) xoHseHcamno c mojibhhm οοοτΗουιβΗΐιθΜ μοηθβηηη yopMajiBserHsyI x: 0.9 to I: 1.3, nsderas οτρι-maTejiBHoro βλεηηεη to CBoíicTBaKJieeB.CiiepEĎHHecxEe ycsoBEfl KOHseHcamn i-b μολβηομ οοοτηοιπθηηεI: 1.8 to I: 2.1 xapaxTepH3p0TCH πρΗΜθΗθΗΗθΜ aTMocwepti sByoxncnyrjieposa πρπ saBJíeHiisx 4-4 · laόν Ila n TeMnepaType 373-413 K. »f · 237964 4 B / iaroflapn KOMdHHanm τηκηχ ycjioBioí KoímeHcaUiíH c nocne-flyiomeS; KOímeHcaujieS. μ so::::::::::::::: 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3

CneimanKCTy no οπητγ padora ηΒβθοτηο, ητο πγτβΜ υμθηβιπθηιιηMOJIBHOIO ΟΟΟΤΗΟΙΠΘΗΗΗ ΜΟΗΘΒΗΗΗ K φορΜΘΛΒβθΓΗ^ B ΠρΚΗΗΗΠΘB03M0JKH0 CHHK6HH6 ΒΗ,ζθΛΘΗΕίΗ C^OpMaJIhflerHfla B ΜΟΗΘΒΗΗΟ-ftopMajiBsenfflHHX iuienx πρη οληοβρθμθηηομ coKpameHHH CTaóiuiB-hocth xpaHOHKH h peaicííHOHHofi cnocočHocTH, a TaK&amp;e yxyjrmeHHHMexaiffiraecKHX noKa3aTejiefi jipeBecHoro MaTepnajia η3γοτοβλθηηογοH3 ΗΘΓΟ.ΠΟΘΤΟΜΥ BBHJQr .ΤΘΚΗΧ ΟΤρί'ΠΙΗΤΘΧΒΗΕΧ ΗΒΛΘΗΗΜ CymeCTByiOTnpefleJIH flJIH γΜΘΗΒΠΙΘΗΗΗ ΜΟΛΒΗΟΓΟ» ΟΟΟΤΗΟΠ1ΘΗΗΗ. OflHaKO ČHJIOHeoaKAaHHocTito ιι ΗβπρθίξΒΗΛθΗΗΗΜ ηβλθηηθμ to, hto npn npiaie-ΗΘΕΗΗ yCJIOBHfi ΚΟΗΛΘΗΟΘΚΗΗ, COBJíaOHO IlSOÓpeTeHHIO, CTaJIOBO3MO2CHHM ρΛΘΗΒΙΙΙΘΗΗΘ MOJIBHOIO ΟΟΟΤΗΟΙΙΙβΗΗΗ ΠΟ ΟρΗΒΗΘΗΗΚ CH3BecTHHM ypoBHeM 0Θ3 SHaniiTejiBHoro yBejinneHHH BHmena3BaH—hhx oTpnnaTejiBHHX ηβλθηηϊϊ.CneimanKCTy no οπητγ PADOR ηΒβθοτηο, ητο πγτβΜ υμθηβιπθηιιηMOJIBHOIO ΟΟΟΤΗΟΙΠΘΗΗΗ ΜΟΗΘΒΗΗΗ K φορΜΘΛΒβθΓΗ ^ B ΠρΚΗΗΗΠΘB03M0JKH0 CHHK6HH6 ΒΗ, ζθΛΘΗΕίΗ C ^ OpMaJIhflerHfla B ΜΟΗΘΒΗΗΟ-ftopMajiBsenfflHHX iuienx πρη οληοβρθμθηηομ coKpameHHH CTaóiuiB-hocth xpaHOHKH h peaicííHOHHofi cnocočHocTH, so &amp; e yxyjrmeHHHMexaiffiraecKHX noKa3aTejiefi jipeBecHoro MaTepnajia η3γοτοβλθηηογοH3 ΗΘΓΟ. ΠΟΘΤΟΜΥ BBHJQr .ΤΘΚΗΧ ΟΤρί'ΠΙΗΤΘΧΒΗΕΧ ΗΒΛΘΗΗΜ CymeCTByiOTnpefleJIH flJIH γΜΘΗΒΠΙΘΗΗΗ ΜΟΛΒΗΟΓΟ »ΟΟΟΤΗΟΠ1ΘΗΗΗ. OflHaKO ČHJIOHeoaKAaHHocTito ιι ΗβπρθίξΒΗΛθΗΗΗΜ ηβλθηηθμ it HTO npn npiaie-ΗΘΕΗΗ yCJIOBHfi ΚΟΗΛΘΗΟΘΚΗΗ, COBJíaOHO IlSOÓpeTeHHIO, CTaJIOBO3MO2CHHM ρΛΘΗΒΙΙΙΘΗΗΘ MOJIBHOIO ΟΟΟΤΗΟΙΙΙβΗΗΗ ΠΟ ΟρΗΒΗΘΗΗΚ CH3BecTHHM ypoBHeM 0Θ3 SHaniiTejiBHoro yBejinneHHH BHmena3BaH-HHX oTpnnaTejiBHHX ηβλθηηϊϊ.

Ilpmep, ocymecTBJíeHHH ιί300ρθτθηιιηIlpmep, ocymecTBJíeHHH ιί300ρθτθηιιη

ΙΊρκΜθρ I B peaKUHOHHHíí cocys HMeroigHS peryjiupoBKy ypoBHfi e npncnocodJie-ffiie Tyin nepeMeniiiBamiH so3npyeTcn co ckopoctbio 100 βθο. pojieíl/nao .ΜΟΗΘΒΙΊΗΟ-φΟρΜΘΛΗΗΟΒΗΗ paCTBOp, B KOTOpOM Ha 972 ΒΘΟ. flOJieíí/pacTBopa πρπχοίζκτοΗ 700 βθο. nojieii 37 % ηθητρ8λιι3οβηηηογοpopManííHa n 272 sec. aojih μοηθβι-ιηη.Οκηοβρθμθηηο b cocyn.CMeuie-hhh noflaeTca 0,5 Bec.nojin /nao ID % MypaBBHHofi khcjioth. BpeaKiíHOHHOM coeyne nonnepiKHBaeTCH Tei.mepaTypa 403 ·Κ , a ra30-odpa3Hoii XByoKECBK yrjiepopa ποοτοηηηοθ naBJíeHHe- 3· 10^ íla. B τθηθηιίθ oflHoro naca 100 sec. nojieíí τηκογο KOHjtéHcaTa, ημθιοβ;θγοnpn Taraax,ycjioBEHx coflepzíaHae μοοτηκοβογο MeTiuieHa 42,3 %,b pacnerejia b3hthh wopMajiBneran, oTdnpaioTCH bo βτοόοιϊ peaicmioH-hhm cocyn, b κοτορπίί flodasjíHiOT 29,2 .βθο. noJieg/nac 70 % βο^ηογο 237964 5 paoTBopa μοηθβηηη η 0,34 Bec. ^ojiefi/nac 10% Haiposoro mejioKa.Βο ΒτοροΜ cocy^e, HMerouinM mipKyjnmHOHHoe npacnocotíjieiffle, προ-bojbítch flajiBHeíiiiiaH KOHaeHcaima πριι TewnepaType 323-343 K hποηοθηηομ saBJíeHKH, a Taiace KOHueHTpamm TBepsófí cmojíh ,n,o-bojpítch flo 67%.HenpepnBH0 OTÓHpaeMHH MOHeBHHO-$opManBflerimHHfiKJiefi c BH3KOCTBK) 560 cnya3/293 K cTadaneH npn xpaHemm h npn-TOfleH OCOÓeHHO ftOH Ι13Γ0Τ0ΒΛθΗΗίΙ CTpyjKeHHHX IUIHT C ΟΗΘΗΒ HH3KHMBHflejieHneM $opMajn>;a;erH,na (fesyp 0,008) IIpuMep 2 B 400 Bec. flOJiax 37% HewTpajiH3OBaHHoro raopMajiHHa b peawioH-hom cocyfle ϊιμθιοπιημ oxjiastfleHHe h otíorpeB, ocHamenHoro nepeMe-uiHBaioímffii ycTpofiCTBOM, pacTBopaioT 151,8 Bec. flojieíi μοηθβηηη hflodaBJWioT 1,1 Bec. αολη 3% οοληηοιϊ κηολοτη.ΙΙοολθ saKpHTHHpeaKTBioHHoro cocysa c πομοαβιο ra3ooópa3Hofi flByoKiícn ymieBO-flopofla ycTanaBJíHBaeTCH flaBJíeime 2,5·Ι05 Ila n.3aTeM b xoflepeaiaíHH noňuepraBaeTCH ποοτοηηηοθ jtaBJíeHne 2,5Ί05 Ila. BTeneHHe οαηογο naca coflepacamíe peawioHHoro cocyna aoboaktchpo TeMnepaTypu 396 K κ KOHfleHCupyeTCH flo τβχ nop, noua neotípa3yeTCH 40,9% Β3Ητογο ňopMajiLflernfla b ňopwe mocthkoboboMeTHJieHa.IIocjie flodaBJíeHira 3,5 Bec. flojiefí 10% HaTpoBoro mejioxaoxJiasflaiOT po TeMnepaTypu 353 K h flodaBJínioT 94,9 Bec. flonefiμοπθβηηη h KOHfleHCHpyKT npn Taitofi TewnepaType b Teneroie 30MIÍHyT.IIoCJie yBejIEHeHHH KOHfleHCaiIHH ΜΟΗβΒΗΗΟ—φορΜΘΛΒ,ηθΓΚΑΗΗΐίKJiefi npn TewnepaType 323 K h 4-IO^IIa odnaflajoT bH3Koctbio620 cnya3/293 h coflep;itaHiieM TBepflofi cmojíh 67,5 %. IIpuMep 3 B peaKDjioHHHíi cocyfl EMeioiímfi peryjnipoBKy ypoBHH n npHcnocodjieHiiePflR nepeMeuiHBaHiiH HenpepiiBHo co ckopoctbio.IOO sec. flojiefi/nacS03npyeT0H pacTBop codepsáními Ha 1124 Bec. flojien 809 Bec..flOJienHefiTpa3E3OBaHHoro 37% yopMajniHa η 315 Bec. flojieii μοηθβκηη. 237964 6BρκΜθρ I B peaKUHOHHíí cocys HMeroigHS peryjiupoB p p p od ie in in in in in in in in in in in in in in in in in..... CTΟ ΜΘΛΗΗΟΒΗΗCTCTCTCTCTCTCTCTCTCTCTCTCTCTCT B B B B B B B B B B B B B B B B B B B B B B B B B B BΟCTCT B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B. flOJieíí / pacTBopa 700 βθο. nojieii 37% ηθητρ8λιι3οβηηηογοpopManííHa n 272 sec. aojih μοηθβι-ιηη.Οκηοβρθμθηηο b cocyn.CMeuie-hhh noflaeTca 0.5 Bec.nojin / nao ID% MypaBBHHofi khcjioth. BpeaKieHOHHOM coeyne nonnepiKHBaeTCH Tei.mepaTypa 403 · Κ, and ra30-odpa3Hoii XByoKECBK yrjiepopa ποοτοηηηοθ naBJeHHe- 3 · 10 ^ γ. B τθηθηιίθ oflHoro naca 100 sec. nojieíí τηκογο KOHjtéHcaTa, ημθιοβ; θγοnpn Taraax, ycjioBEHx coflepzíaHae μοοτηκοβογο MeTiuieHa 42.3% b pacnerejia b3hthh wopMajiBneran, oTdnpaioTCH bo βτοόοιϊ peaicmioH cocyn HHM-b κοτορπίί flodasjíHiOT 29.2 .βθο. noJieg / nac 70% βο ^ ηογο 237964 5 paoTBopa μοηθβηηη η 0.34 Bec. ^ Ojiefi / NAC 10% Haiposoro mejioKa.Βο ΒτοροΜ Coca-e HMerouinM mipKyjnmHOHHoe npacnocotíjieiffle, προ-bojbítch flajiBHeíiiiiaH KOHaeHcaima πριι TewnepaType 323-343 K hποηοθηηομ saBJíeHKH and Taiace KOHueHTpamm TBepsófí cmojíh, N, O-flo bojpítch 67% .HenpepnBH0 OTÓHpaeMHH MOHeBHHO- $ opManBflerimHHfiKJiefi c BH3KOCTBK) 560 cnya3 / 293 K cTadaneH npn xpaHemm h npn-TOfleH OCOOhHO ftOH Ι13Γ0Τ0ΒΛθΗΗίΙ CTpyjKeHHHX IUIHT C ΟΗΘΗΒ HH3KHMBHflejieHneM $ opMajn>; bp x 37% of HewTpajiH3OBaHHoRaHHa b peawioH-cocyfleIcHeIcHeIeHeIcHeHeOnHeOnHeBeOnHeNoMeIeHiOnBaIcIeIeIeIfToPiTBOM, pacTBopaioT 151.8 Bec. flojieíi μοηθβηηη hflodaBJWioT 1.1 Bec. αολη 3% οοληηοιϊ κηολοτη.ΙΙοολθ saKpHTHHpeaKTBioHHoro cocysa c πομοαβιο ra3ooópa3Hofi flByoKiícn ymieBO-flopofla ycTanaBJíHBaeTCH flaBJíeime 2.5 · Ι05 Ila n.3aTeM b xoflepeaiaíHH noňuepraBaeTCH ποοτοηηηοθ jtaBJíeHne 2,5Ί05 Ila. EneHHeοacaeneeneeneeneeneeneaca666eaeaeaea ea66eaeaeaeaeaeaeaeaea6,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9 flojiefí 10% HaTpoBoro mejioxaoxJiasflaiOT after TeMnepaTypty 353 K h flodaBiOn 94,9 Bec. flonefiμοπθβηηη h KOHfleHCHpyKT npn Taitofi TewnepaType b Teneroie 30MIÍHyT.IIoCJie yBejIEHeHHH KOHfleHCaiIHH ΜΟΗβΒΗΗΟ-φορΜΘΛΒ, ηθΓΚΑΗΗΐίKJiefi npn TewnepaType 323 K H 4 IO ^ IIa odnaflajoT bH3Koctbio620 cnya3 / h 293 coflep; itaHiieM TBepflofi cmojíh 67.5%. IIpuMep 3 B peaKDjioHHHi cocyfl EMeioIfi peryjnipoBe ypoBHH nPHcnocodjieHiiePflR nepeMeuiHBaHiiH HenpepiiBHo co ckopoctbio.IOO sec. flojiefi / nacS03npyeT0H pacTBop coded by Ha 1124 Bec. flojien 809 Bec..flOJienHefiTpa3E3OBaHHoro 37% yopMajniHa η 315 Bec. flojieii μοηθβκηη. 237964 6

OflHOBpeweHHo b cocy,n cyeiueHUH no^aeTCH 0,9 sec. íOJiefiAac10% MypaBLKHofi khcjioth.B peawíOHHóM cocyse nojwepsoíBaeTCHποοτοΗΗΗΟ TewnepaTypa 393 K, a ra3ootípa3řiofl AByoKHCBio yrjiepoaa.naaneHiie 2,5*iob Ila.B τθηθηηθ οληογο naca 100 βθο.^ολθηKOHfleHcaTa, HMeronjero πρκ Tara-ix ycnoBKHX coaepsaHtie μοοτηκοβογοMeTiwteHa 46,2%, BpacneTe Ha b3hthm $opMa3ií>í[erH^,oTÓHpaioTCHbo BTopofi peawioHHBffl cocys, b κοτοριώ soóaBJíHioT 37,4 Bec.B,OJiew/aac 75% βοαηογο pacTeopa μοηθβηηη h 0,56 Bec. floJieii/Hac10$ HaTpoBoro mejioKa.Bo BTopow pearauioHHOM cocyse, ΗΜθιοπξΗΜHHpKyjumnoHHoe npncnocoóJiemie, προΒοτξκτωι λθλβηθιϊιιιθη KOHfleHca-ipifl. npn TeMnepaType 323-343 K η ποηηκθηηομ ληβλθηηη, a KQHpeHTpaHKH TBepflOÍi CMOJIH flOBO^HTCH flO 67 %.HeiipeptIBHO OTdupaeMHH MO-HeBHHo-ftopManifleriwfflfi imeS c BH3KOCTBJO 470 cnya3/293 CTaóimeHπριι xpaHeHHH η npiiro,neH ocodeiiHo jyiH κ3γοτοβλθηιίη CTpyaeHHHXΠΛΗΤ C ΟΗΘΗΒ HH3KEM BtifleJieiffieM φορίϊΙ^ΠΒΑΘΓΗ^ (FESYP 0,005). ΠρπΜβρ 4 B cjiesyiomeií Taójnme οοποοτηβλθηκ jrai-iHHe οτβ0ιμβηοοτη xpaHeHHHK xápakTepiiCTEKH ΤΘΧΗΗΗΘΟΚΟΓΟ ΠρίίΜΘΗβΗΕΗ OÓHHHOBO ΚΗΘΗ C flaH-hhmh oeeB, noJiyHenHUX corJiacHo iisotípeTemiio. CBoíícTBa OÓHHHbie Κλθιι, noHyneumie corjiacno hso- iuien dpeTeiH-uo Πρ I Πρ 2 Hp3OflHOBpeweHH b bococy, n cyeiHUH no ^ aeTCH 0.9 sec. íOJiefiAac10% MypaBLKHofi khcjioth.B peawíOHHóM cocyse nojwepsoíBaeTCHποοτοΗΗΗΟ TewnepaTypa 393 K, and ra3ootípa3řiofl AByoKHCBio yrjiepoaa.naaneHiie 2.5 * IOB Ila.B τθηθηηθ οληογο NACA 100 βθο. ^ ολθηKOHfleHcaTa, HMeronjero πρκ Tara-ix ycnoBKHX coaepsaHtie μοοτηκοβογοMeTiwteHa 46.2% BpacneTe The pH of the BTopofiHHBffl cocys, b, and BocHiOt is 37.4 Bec.B, OJiew / a 75% b. floJieii / Hac10 $ HaTpoBoro mejioKa.Bo BTopow pearauioHHOM cocyse, ΗΜθιοπξΗΜHHpKyjumnoHHoe npncnocoóJiemie, προΒοτξκτωι λθλβηθιϊιιιθη KOHfleHca-ipifl. npn TeMnepaType 323-343 K η ποηηκθηηομ ληβλθηηη and KQHpeHTpaHKH TBepflOÍi CMOJIH Flobo HTCH-Flo 67% .HeiipeptIBHO OTdupaeMHH MO HeBHHo ftopManifleriwfflfi Imes-c BH3KOCTBJO cnya3 470/293 CTaóimeHπριι xpaHeHHH η npiiro, NEH ocodeiiHo jyiH κ3γοτοβλθηιίη CTpyaeHHHXΠΛΗΤ C ΟΗΘΗΒ HH3KEM BtifleJieiffieM φορίϊΙ ^ ΠΒΑΘΓΗ ^ (FESYP 0.005). 4 B cjiesyiomeií Taójnme οοποοτηβλθηκ jrai-iHHe οτβ0ιμβηοοτη xpaHeHHHK xapakTepiiCTEKH Π ΠρίίΜΘΗβΗΕΗ OÓHHHOBO fla C flaH-hhmh oeeB, noJiyHenHUX corJiacHo iisotípeTemiio. CBoíícTBa OÓHHHbie Κλθιι, noHyneumie corjiacno hso-iuien dpeTeiH-uo Πρ I Πρ 2 Hp3

Bpehw ηθλβτηηηβθιϊιιη 168 154 ~ 173 1,0 :2,I I : 2,2 I : 2,5 2 Mec. 2'Mec. 2 Mec. 0,008 ' 0,015 0,005 b cex. 170-180Bpehw ηθλβτηηβθιιιιη 168 154 ~ 173 1.0: 2, I: 2.2 I: 2.5 2 Mec. 2'Mec. 2 Mec. 0.008 '0.015 0.005 b cex. 170-180

EofíOCOBMeCTÍIMOCTB ·nox 293 K I : 2,3 CTaóHJiBHocTB xpaHe-HHH πρκ 293 K 2 Mec. ~ 4-)EOFOCOFFICIENTOCTB · nox 293 K I: 2.3 CTaHJiBHocTB xpaHe-HHH πρκ 293 K 2 Mec. ~ 4-)

BujiejiHBinHHCH WOpMaJIB- 'sen-ífl H3 CTpyEeHHOHiwkth· 0,025 jip (FESYP ) 0,020 237964 7 +) KojnraecTBO BH^ejniBiuerocH cJopMajiBflerHjia c noMoujLK) λο-óaBJíeHHÍÍ British Standard i8'i1 : Part 2 : 1969 onyúJiKKOBaHHHX 31. 10. 1973 rosy. íaHHue EHflejiiíBiuerocíi ĚiopidaziB^eriífla ns CTpyKeHnux imhtjícho jieMOHCTpupyiOT npeiíMymecTBa weTojia nojiyneinifi oeaCOIViaGHO Η3Ο0ρΘΤΘΗΗΙ0. 237964 8BujiejiHBinHHCH WOpMaJIB- 'sen-ífl H3 CTpyEeHHOHiwkth · 0.025 jip (FESYP) 0.020 237964 7 +) aHHue EHflejiiíBiuerocíi ìiopidaziB ^ eriífla ns CTpyKeHnux imhtjícho jieMOHCTpupyiOT npeiíMymecTBa weTojia nojiyneinifi oeaCOIViaGHO Η3Ο0ρΘΤΘΗΗΙ0. 237964 8

IlpejweT H3odpeTeiMH I.) Μβτο,ζ.nojQmeHHH κλθθβ ΜΟΗΘΒΗΗο-φορΜδΛΒΛθΓΐίΛΗοβ ομολη Κ3Γ0Τ0ΒΛβΗΙ£Η ΛρβΒβΟΗΗΧ ΜΗΤβρΗ&amp;ΛΟΒ C ΟΗβΗΒ HII3KHM ΒΗββΛβ-ηηθμ ĎopMairLflerafla nyiew KOH^eHcamm μοηθβηηη-η Φορμθλβ- ..serii;a;á'B μολβηομ cooTHouieHHH Γ 1,8 λο I : 2,1 ηρκ τθμπθ-paTypax 373-414 Κ η npeBpameHHH sthx κοηλθηοβτοβ ηθβθοτηημotípa3óM β .CMOJiBHBe'ιυΐθκ xapaKTepK3yeTca τθμ, ητο-μοηθβΙ'ΠηιΗ φορΜΘΛΒβθΓΗΒ Β BOflHOM paCTBOpe Β npilCyTCTBHH 0,05-0,5%opraHMHecKoň η ηθοργθηηηθθκοη κκολοτη, β pacneT© Ha βθητοθΚΟΛΗΗβΟΤΒΟ ΜΟΗΘΒΙ'ΙΗΗ, ΠρΗ nOSflepJXaHHH flaSJíeiBIH SByOKHCHyrjiepojja Ι-4Ί05 íla KOHfleHCHpyeTCH po τθχ nop, noxa He dy-Λθτ socTi-irHyTO He wenee 40% β3Ητ.ογο roopMajiBBenwa b ňopweMOGTIIKOBOrO ΜΘΤΗΛΘΗΗ Η 3T0T npOpyKT pa3mOSeHKH ΚΟΗ^ΘΗΟΕ-pyeTCH flajiee β ηθητρηλβηοη ra cjiadomejioHHoií odjiacTii npnflOdaBJíeHHH ΜΟΗΘΒΗΗΗ-βΟ ΜΟΛΒΗΟΓΟ COOTHOlUeHHH ΜΟΉβΒΙΙΗΗ KcpopMajiBseriijjy I : 0,9 - I : 1,3 η πρκ. HeodxojijEiocTHoflHOBpeMeimoM yBejiHHeHKK κοηηθητρηηιιη. 2.) LieTOfl.coBJíacHo nyHKTy I, xapKTepH3yeTCH τθμ, hto κλθη μοηθβηηο ňopMa.nBjí.erwiOM ci,ΙΟΛΗ πμθθτ BH3KOCTB 400-1000 cnyas/293. 237964 9 OóodmeHHe H3oópeTeHHe -KacáeTOH MÓTOíta nojiyqeHHH KiieeB Μο,πβΒΗΗο-φορΜΗώΕ.-..flernflHoii cmojiHj irpu riepepaóÓTKe κοτοροϋ no cpfiBHeHHio c otíHHHH-*,mu. juiéflMH BH^ejiHeTCH 3HaoTejii)Ho MeHLinee KojumécTBO $opMajiBfle-rrasa, ' ' ·. 3asana:pa3patíoTKH .MéTosa nosBOJÍmomero nojiynerae κλθθβ MOHeBHHQ-$opMaflbfleniflHHx cmoji c οηθηβ μθΛημγ cosepatamieto $opMajn»s§rimapemaeTCH TeM, hto MoneBHHa h'dbopMasBserijs KoHseHcupyioTCH bboshom pacTBope b πρπογτοΦΒΗΗ 0,05-0,5$ opramraeoKoS.h· .Héopra-HmecKoň khcjioth, b pacneTe Ha ncnoJiB3yeMoe KOjnraecTBO Mone-bhhh, npn nojwepscaHHH saBJíeHHH flByÓKHCH yrjiepĎfla 1-4·lO^IIaΛο Tex nop, nona ne.dyseT socrarHyTo ne MeHee 40$ β3ητογο^OpMajIBflerHSa ,CBH3aHHOrO Ě φορΜθ ΜΟΟΤΗΚΟΒΟΓΟ Me.THJieHa Η 3TOT 'npoflyKT. pa3Jio>seHHH KOHseHCHpyeTCH sanee ,nocjie' sodaBJíeHHH μο·=· -ΗΘΒΗΗΗ £0 MOJIHpiIOra CQOTHOUIOHHH „MOH6BHHH K fiopMaJIBfleraSy I I 0^9flo I : 1,3 η npn HeoóxoíjíMocTH oshobpsmqhhom yBeJiHnemoi κοηηθητρΗΗΗ, ' ' . 'ΜοΗβΒΗΗό-φορΜάπΒΛθϊΉ,ίξΗΗθ ομολη HcnojiB3yBTCfl β flepeBonepepaóaTHBa, roi^efl npÓMHoeHHocTii ocoděHHO ripá η3γοτοβλ0ηηη CTpysenHHX ιυώτ. : 237964IlpejweT H3odpeTeiMH I) Μβτο, ζ.nojQmeHHH κλθθβ ΜΟΗΘΒΗΗο-φορΜδΛΒΛθΓΐίΛΗοβ ομολη Κ3Γ0Τ0ΒΛβΗΙ £ Η ΛρβΒβΟΗΗΧ ΜΗΤβρΗ &amp; C ΛΟΒ ΟΗβΗΒ HII3KHM ΒΗββΛβ-ηηθμ ĎopMairLflerafla nyiew KOH ^ eHcamm μοηθβηηη-η Φορμθλβ- ..serii, and; A'B μολβηομ cooTHouieHHH Γ 1.8 λο I: 2,1-ηρκ τθμπθ paTypax 373-414 Κ η npeBpameHHH sthx κοηλθηοβτοβ ηθβθοτηημotípa3óM β .CMOJiBHBe'ιυΐθκ xapaKTepK3yeTca τθμ, ητο-μοηθβΙ'ΠηιΗ φορΜΘΛΒβθΓΗΒ β β BOflHOM paCTBOpe npilCyTCTBHH from 0.05 to 0.5% opraHMHecKoň η ηθοργθηηηθθκοη κκολοτη, β Pacnet © Ha βθητοθΚΟΛΗΗβΟΤΒΟ ΜΟΗΘΒΙ'ΙΗΗ, ΠρΗ nOSflepJXaHHH flaSJíeiBIH SByOKHCHyrjiepojja Ι-ILA 4Ί05 KOHfleHCHpyeTCH after τθχ nop, NOXA Ile-dy Λθτ SOCTA irHyTO Ile-Wen 40% β3Ητ.ογο roopMajiBBenwa b ňopweMOGTIIKOBOrO ΜΘΤΗΛΘΗΗ Η 3T0T npOpyKT pa3mOSeHKH ΚΟΗ ^ ΘΗ Ε-pyeTCH flajiee β ηθητρηλβηοη ra cjiadomejioHHoií odjiacTii npnflOdaBJíeHHH ΜΟΗΘΒΗΗΗ-βΟ ΜΟΛΒΗΟΓΟ COOTHOlUeHHH ΜΟΉβΒΙΙΗΗ KcpopMajiBseriijjy I 0.9 - I 1.3 η πρκ. HeodxojijEiocTHoflHOBpeMeimoM yBejiHHeHKK κοηηθητρηηιιη. 2.) LieTOfl.coBJíacHo nyHKTy I, xapKTepH3yeTCH τθμ, hto κλθη μοηθβηηο opοMMaaBBwiwiwiwiwi wiwiwiiiiiiiiiiii 293 293 293 293, 237964 9 OhoodmeHHe H3oópeTeHHe -KacáeTOH MÓTOíta nojiyqeHHH KiieeB Μο, πβΒΗΗο-φορΜΗώΕ .-. juiéflMH BH ^ ejiHeTCH 3HaoTejii) Ho MeHLinee KojumécTBO $ opMajiBfle-rrasa, '' ·. 3asana: pa3patíoTKH .MéTosa nosBOJÍmomero nojiynerae κλθθβ MOHeBHHQ- $ opMaflbfleniflHHx cmoji c οηθηβ μθΛημγ cosepatamieto $ opMajn »s§rimapemaeTCH those HTO MoneBHHa h'dbopMasBserijs KoHseHcupyioTCH bboshom pacTBope b πρπογτοΦΒΗΗ $ 0.05-0.5 opramraeoKoS.h · .Héopra- HmecKoň khcjioth b pACN ncnoJiB3yeMoe KOjnraecTBO Ha-Mone bhhh, NPN nojwepscaHHH saBJíeHHH flByÓKHCH yrjiepĎfla 1-4 · Lo-Tex IIaΛο nop, nona ne.dyseT socrarHyTo not MeHee 40 $ ^ β3ητογο OpMajIBflerHSa, CBH3aHHOrO Ì φορΜθ ΜΟΟΤΗΚΟΒΟΓΟ Me.THJieHa Η 3This' npoflyKT. pa3Jio> seHH KOHseHCHpyeTCH sanee, nocjie 'sodaBJíHHH μο · = · -ΗΘΒΗΗΗ £ 0 MOJIHpiIOra CQOTHOUIOHHH „MOH6BHHH K fiopMaJIBfleraSy I I 0 ^ 9flo I: 1,3 η npn HeoóxoíjíMocTH oshobpsmqhhom yBeJiHnemoi κοηηθητρΗΗΗ,' '. CοΗβΒΗΗό-φορΜάπΒΛθϊΉ, ίξΗΗθ ομολη HcnojiB3yBTCfl β flepeBonepepaóaTHBa, roi ^ efl npÓMHoeHHocTii ocoděHHO ripá η3γοτοβλ0ηηη CTpysenHHX ιυώτ. : 237964

Claims (2)

237964 10 PŘEDMĚT VYNÁLEZU237964 10 OBJECT OF THE INVENTION 1. Způsob výroby lepidel na bázi močovinofonaaldehydových pryskyřic, pro výrobu mate-riálů ze dřeva s velmi nízkým uvolňováním formaldehydu, kondenzací močoviny a formaldehyduv molárním poměru 1:1,8 až 1:2,1 při teplotách 373 až 414 K a přeměně těchto kondenzátů známým způsobem v pryskyřičná lepidla, vyznačující se tím, že se močovina a formaldehyd kon-denzují ve vodném roztoku ze přítomnosti 0,05 až 0,5 % organické a anorganické Icyseliny,vztaženo ne výchozí množství močoviny při tlaku kysličníku uhličitého 1 až 4 z 10^ Pa takdlouho, až se dosáhne více než 40 % kondenzace formaldehydu ve formě metylenových můstků a tento produkt se dále kondenzuje v neutrální nebo slabě alkalické oblasti za přídavkumočoviny do molárního poměru močoviny k formaldehydu 1:0,9 až 1:1,3 a v případě potřebyza současného zvýšení koncentrace.A process for the production of urea-formaldehyde resin based adhesives, for producing very low formaldehyde release wood materials, by urea and formaldehyde condensation in a 1: 1.8 to 1: 2.1 molar ratio at 373 to 414 K and converting these condensates in a known manner in resinous adhesives, characterized in that the urea and formaldehyde are condensed in an aqueous solution from the presence of 0.05 to 0.5% of organic and inorganic acid based on the starting amount of urea at a carbon dioxide pressure of 1 to 4 of 10 Until a formaldehyde condensation of more than 40% in the form of methylene bridges is achieved and the product is further condensed in a neutral or weakly alkaline region with additional urea to a urea to formaldehyde molar ratio of 1: 0.9 to 1: 1.3; if needed to increase concentration simultaneously. 2. Způsob podle bodu i, vyznačující Se tím, že lepidlo na bázi močovinoformaldehydovépryskyřice má viskositu 400 až 1 000 cP/293 K. Uznáno vynálezem na základě výsledků expertizy, provedené Úřadem pro vynálezectví apatentnictví, Berlín, DD.2. Process according to claim 1, characterized in that the urea-formaldehyde resin based adhesive has a viscosity of 400 to 1000 cP / 293 K. Recognized by the invention on the basis of the results of an expert review carried out by the Apatent Inventory Office, Berlin, DD.
CS815971A 1980-10-01 1981-08-07 Method of adhesive production on base of urea-formaldehyde resins CS237964B1 (en)

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EP0103131A3 (en) * 1982-09-10 1985-11-06 Borden, Inc. Amino-formaldehyde resins and use thereof in lignocellulosic composites
DD283732A7 (en) * 1988-10-21 1990-10-24 ������@�����`������@ ���@������� k�� METHOD FOR PRODUCING A REACTIVE UREA FORMALDEHYDE RESIN LIME
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DE906016C (en) * 1950-06-04 1954-03-08 Basf Ag Process for the production of hardenable, stable condensation products
CH375337A (en) * 1958-10-20 1964-02-29 Geistlich Soehne Ag Process for the production of water-soluble urea-formaldehyde condensation products
FR2199543A1 (en) * 1972-09-21 1974-04-12 Nobel Hoechst Chimie U-F resin prodn using two-stage process, - esp for wood chip boards mfr
DE2334380B1 (en) * 1973-07-06 1974-09-05 Basf Ag Process for making a wood glue
GB1480787A (en) * 1975-09-11 1977-07-27 Ciba Geigy Ag Ureaformaldehyde resins
DD139946A3 (en) * 1975-12-22 1980-01-30 Henry Drechsel METHOD FOR THE PRODUCTION OF UREA FORMALDEHYDE RESIN PAPERS WITH IMPROVED COLD ADHESIVE FORCED FOR SPATCHPLANT PRODUCTION
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