AU2003206319B2 - Method of joining wood based materials - Google Patents
Method of joining wood based materials Download PDFInfo
- Publication number
- AU2003206319B2 AU2003206319B2 AU2003206319A AU2003206319A AU2003206319B2 AU 2003206319 B2 AU2003206319 B2 AU 2003206319B2 AU 2003206319 A AU2003206319 A AU 2003206319A AU 2003206319 A AU2003206319 A AU 2003206319A AU 2003206319 B2 AU2003206319 B2 AU 2003206319B2
- Authority
- AU
- Australia
- Prior art keywords
- resin
- pieces
- wood based
- adhesive composition
- composition
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
Links
- 238000000034 method Methods 0.000 title claims description 38
- 239000002023 wood Substances 0.000 title claims description 33
- 239000000463 material Substances 0.000 title claims description 26
- 238000005304 joining Methods 0.000 title claims description 15
- 239000000203 mixture Substances 0.000 claims description 85
- 239000000853 adhesive Substances 0.000 claims description 63
- 230000001070 adhesive effect Effects 0.000 claims description 63
- 229920005989 resin Polymers 0.000 claims description 37
- 239000011347 resin Substances 0.000 claims description 37
- 239000000126 substance Substances 0.000 claims description 33
- 238000003825 pressing Methods 0.000 claims description 23
- 229920001568 phenolic resin Polymers 0.000 claims description 18
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 16
- 238000007731 hot pressing Methods 0.000 claims description 14
- 239000005011 phenolic resin Substances 0.000 claims description 13
- 229920003180 amino resin Polymers 0.000 claims description 11
- 239000004327 boric acid Substances 0.000 claims description 6
- 150000002148 esters Chemical class 0.000 claims description 6
- 229920000877 Melamine resin Polymers 0.000 claims description 5
- 150000001642 boronic acid derivatives Chemical class 0.000 claims description 4
- 229910021645 metal ion Inorganic materials 0.000 claims description 4
- 241000894007 species Species 0.000 claims description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 3
- 150000002596 lactones Chemical class 0.000 claims description 3
- 150000005677 organic carbonates Chemical class 0.000 claims description 3
- 239000011120 plywood Substances 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 235000019422 polyvinyl alcohol Nutrition 0.000 claims description 3
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 claims description 2
- 238000009408 flooring Methods 0.000 claims description 2
- 230000000737 periodic effect Effects 0.000 claims description 2
- 239000011118 polyvinyl acetate Substances 0.000 claims description 2
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 2
- 229910001428 transition metal ion Inorganic materials 0.000 claims description 2
- 241000736839 Chara Species 0.000 claims 1
- 125000005619 boric acid group Chemical group 0.000 claims 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 12
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 9
- 150000001875 compounds Chemical class 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- 239000000654 additive Substances 0.000 description 7
- 239000004848 polyfunctional curative Substances 0.000 description 7
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 6
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 5
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 5
- 150000002989 phenols Chemical class 0.000 description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 4
- 238000004026 adhesive bonding Methods 0.000 description 4
- -1 alkyl phenols Chemical class 0.000 description 4
- 229910052796 boron Inorganic materials 0.000 description 4
- 235000013312 flour Nutrition 0.000 description 4
- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 description 4
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 4
- 229920001187 thermosetting polymer Polymers 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 150000001299 aldehydes Chemical class 0.000 description 3
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 3
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N butyric aldehyde Natural products CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 3
- 235000010339 sodium tetraborate Nutrition 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 2
- ZXSBYAWLZRAJJY-UHFFFAOYSA-N 2,6-dihydroxybenzaldehyde phenol Chemical compound C1(O)=C(C(O)=CC=C1)C=O.OC1=CC=CC=C1 ZXSBYAWLZRAJJY-UHFFFAOYSA-N 0.000 description 2
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 2
- AMIMRNSIRUDHCM-UHFFFAOYSA-N Isopropylaldehyde Chemical compound CC(C)C=O AMIMRNSIRUDHCM-UHFFFAOYSA-N 0.000 description 2
- NBBJYMSMWIIQGU-UHFFFAOYSA-N Propionic aldehyde Chemical compound CCC=O NBBJYMSMWIIQGU-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 241000209140 Triticum Species 0.000 description 2
- 235000021307 Triticum Nutrition 0.000 description 2
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 2
- 239000001164 aluminium sulphate Substances 0.000 description 2
- 235000011128 aluminium sulphate Nutrition 0.000 description 2
- 229910021538 borax Inorganic materials 0.000 description 2
- NMJJFJNHVMGPGM-UHFFFAOYSA-N butyl formate Chemical compound CCCCOC=O NMJJFJNHVMGPGM-UHFFFAOYSA-N 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000007766 curtain coating Methods 0.000 description 2
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 description 2
- 235000019439 ethyl acetate Nutrition 0.000 description 2
- 229940093499 ethyl acetate Drugs 0.000 description 2
- FKRCODPIKNYEAC-UHFFFAOYSA-N ethyl propionate Chemical compound CCOC(=O)CC FKRCODPIKNYEAC-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical group NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
- IXQGCWUGDFDQMF-UHFFFAOYSA-N o-Hydroxyethylbenzene Natural products CCC1=CC=CC=C1O IXQGCWUGDFDQMF-UHFFFAOYSA-N 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920001290 polyvinyl ester Polymers 0.000 description 2
- HUAZGNHGCJGYNP-UHFFFAOYSA-N propyl butyrate Chemical compound CCCOC(=O)CCC HUAZGNHGCJGYNP-UHFFFAOYSA-N 0.000 description 2
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 2
- 239000004328 sodium tetraborate Substances 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical group NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 2
- URAYPUMNDPQOKB-UHFFFAOYSA-N triacetin Chemical compound CC(=O)OCC(OC(C)=O)COC(C)=O URAYPUMNDPQOKB-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-propanediol Substances OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 1
- WERYXYBDKMZEQL-UHFFFAOYSA-N 1,4-butanediol Substances OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 1
- XUKSWKGOQKREON-UHFFFAOYSA-N 1,4-diacetoxybutane Chemical compound CC(=O)OCCCCOC(C)=O XUKSWKGOQKREON-UHFFFAOYSA-N 0.000 description 1
- HNAGHMKIPMKKBB-UHFFFAOYSA-N 1-benzylpyrrolidine-3-carboxamide Chemical compound C1C(C(=O)N)CCN1CC1=CC=CC=C1 HNAGHMKIPMKKBB-UHFFFAOYSA-N 0.000 description 1
- HFZLSTDPRQSZCQ-UHFFFAOYSA-N 1-pyrrolidin-3-ylpyrrolidine Chemical compound C1CCCN1C1CNCC1 HFZLSTDPRQSZCQ-UHFFFAOYSA-N 0.000 description 1
- DGXAGETVRDOQFP-UHFFFAOYSA-N 2,6-dihydroxybenzaldehyde Chemical compound OC1=CC=CC(O)=C1C=O DGXAGETVRDOQFP-UHFFFAOYSA-N 0.000 description 1
- UHOPWFKONJYLCF-UHFFFAOYSA-N 2-(2-sulfanylethyl)isoindole-1,3-dione Chemical compound C1=CC=C2C(=O)N(CCS)C(=O)C2=C1 UHOPWFKONJYLCF-UHFFFAOYSA-N 0.000 description 1
- JTXMVXSTHSMVQF-UHFFFAOYSA-N 2-acetyloxyethyl acetate Chemical compound CC(=O)OCCOC(C)=O JTXMVXSTHSMVQF-UHFFFAOYSA-N 0.000 description 1
- NYBXFCLDEATPCM-UHFFFAOYSA-N 3-methyloxetan-2-one Chemical compound CC1COC1=O NYBXFCLDEATPCM-UHFFFAOYSA-N 0.000 description 1
- JFMGYULNQJPJCY-UHFFFAOYSA-N 4-(hydroxymethyl)-1,3-dioxolan-2-one Chemical compound OCC1COC(=O)O1 JFMGYULNQJPJCY-UHFFFAOYSA-N 0.000 description 1
- 229930188104 Alkylresorcinol Natural products 0.000 description 1
- OKJADYKTJJGKDX-UHFFFAOYSA-N Butyl pentanoate Chemical compound CCCCOC(=O)CCCC OKJADYKTJJGKDX-UHFFFAOYSA-N 0.000 description 1
- FERIUCNNQQJTOY-UHFFFAOYSA-M Butyrate Chemical compound CCCC([O-])=O FERIUCNNQQJTOY-UHFFFAOYSA-M 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- XZMCDFZZKTWFGF-UHFFFAOYSA-N Cyanamide Chemical compound NC#N XZMCDFZZKTWFGF-UHFFFAOYSA-N 0.000 description 1
- ICMAFTSLXCXHRK-UHFFFAOYSA-N Ethyl pentanoate Chemical compound CCCCC(=O)OCC ICMAFTSLXCXHRK-UHFFFAOYSA-N 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 description 1
- JGFBQFKZKSSODQ-UHFFFAOYSA-N Isothiocyanatocyclopropane Chemical compound S=C=NC1CC1 JGFBQFKZKSSODQ-UHFFFAOYSA-N 0.000 description 1
- RJUFJBKOKNCXHH-UHFFFAOYSA-N Methyl propionate Chemical compound CCC(=O)OC RJUFJBKOKNCXHH-UHFFFAOYSA-N 0.000 description 1
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 1
- 235000008577 Pinus radiata Nutrition 0.000 description 1
- 241000218621 Pinus radiata Species 0.000 description 1
- ROJKPKOYARNFNB-UHFFFAOYSA-N Propyl pentanoate Chemical compound CCCCC(=O)OCCC ROJKPKOYARNFNB-UHFFFAOYSA-N 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000016383 Zea mays subsp huehuetenangensis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- XGCTUKUCGUNZDN-UHFFFAOYSA-N [B].O=O Chemical compound [B].O=O XGCTUKUCGUNZDN-UHFFFAOYSA-N 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- GSCLMSFRWBPUSK-UHFFFAOYSA-N beta-Butyrolactone Chemical compound CC1CC(=O)O1 GSCLMSFRWBPUSK-UHFFFAOYSA-N 0.000 description 1
- VEZXCJBBBCKRPI-UHFFFAOYSA-N beta-propiolactone Chemical compound O=C1CCO1 VEZXCJBBBCKRPI-UHFFFAOYSA-N 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- WZRZKFUVOSDSBQ-UHFFFAOYSA-N butane-1,2-diol;carbonic acid Chemical compound OC(O)=O.CCC(O)CO WZRZKFUVOSDSBQ-UHFFFAOYSA-N 0.000 description 1
- ANQJWUKLNGHYIP-UHFFFAOYSA-N butane-1,3-diol;carbonic acid Chemical compound OC(O)=O.CC(O)CCO ANQJWUKLNGHYIP-UHFFFAOYSA-N 0.000 description 1
- OBNCKNCVKJNDBV-UHFFFAOYSA-N butanoic acid ethyl ester Natural products CCCC(=O)OCC OBNCKNCVKJNDBV-UHFFFAOYSA-N 0.000 description 1
- 229940043232 butyl acetate Drugs 0.000 description 1
- PWLNAUNEAKQYLH-UHFFFAOYSA-N butyric acid octyl ester Natural products CCCCCCCCOC(=O)CCC PWLNAUNEAKQYLH-UHFFFAOYSA-N 0.000 description 1
- CHYOCNJYMLMTNE-UHFFFAOYSA-N carbonic acid;pentane-1,2-diol Chemical compound OC(O)=O.CCCC(O)CO CHYOCNJYMLMTNE-UHFFFAOYSA-N 0.000 description 1
- MEYBCCDNSNEEGP-UHFFFAOYSA-N carbonic acid;pentane-1,3-diol Chemical compound OC(O)=O.CCC(O)CCO MEYBCCDNSNEEGP-UHFFFAOYSA-N 0.000 description 1
- 150000001728 carbonyl compounds Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001896 cresols Chemical class 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 150000004691 decahydrates Chemical class 0.000 description 1
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 description 1
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 1
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 description 1
- CDMADVZSLOHIFP-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane;decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 CDMADVZSLOHIFP-UHFFFAOYSA-N 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 description 1
- HANVTCGOAROXMV-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine;urea Chemical compound O=C.NC(N)=O.NC1=NC(N)=NC(N)=N1 HANVTCGOAROXMV-UHFFFAOYSA-N 0.000 description 1
- SLGWESQGEUXWJQ-UHFFFAOYSA-N formaldehyde;phenol Chemical compound O=C.OC1=CC=CC=C1 SLGWESQGEUXWJQ-UHFFFAOYSA-N 0.000 description 1
- WBJINCZRORDGAQ-UHFFFAOYSA-N formic acid ethyl ester Natural products CCOC=O WBJINCZRORDGAQ-UHFFFAOYSA-N 0.000 description 1
- 235000013773 glyceryl triacetate Nutrition 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-M hexanoate Chemical compound CCCCCC([O-])=O FUZZWVXGSFPDMH-UHFFFAOYSA-M 0.000 description 1
- YAMHXTCMCPHKLN-UHFFFAOYSA-N imidazolidin-2-one Chemical compound O=C1NCCN1 YAMHXTCMCPHKLN-UHFFFAOYSA-N 0.000 description 1
- 235000009973 maize Nutrition 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- HNBDRPTVWVGKBR-UHFFFAOYSA-N methyl pentanoate Chemical compound CCCCC(=O)OC HNBDRPTVWVGKBR-UHFFFAOYSA-N 0.000 description 1
- 229940017219 methyl propionate Drugs 0.000 description 1
- YKYONYBAUNKHLG-UHFFFAOYSA-N n-Propyl acetate Natural products CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 description 1
- UUIQMZJEGPQKFD-UHFFFAOYSA-N n-butyric acid methyl ester Natural products CCCC(=O)OC UUIQMZJEGPQKFD-UHFFFAOYSA-N 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 description 1
- 229920000166 polytrimethylene carbonate Polymers 0.000 description 1
- 229960000380 propiolactone Drugs 0.000 description 1
- 229940090181 propyl acetate Drugs 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 239000001648 tannin Substances 0.000 description 1
- 235000018553 tannin Nutrition 0.000 description 1
- 229920001864 tannin Polymers 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 229960002622 triacetin Drugs 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- 125000002256 xylenyl group Chemical class C1(C(C=CC=C1)C)(C)* 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/13—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board all layers being exclusively wood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G11/00—Applying adhesives or glue to surfaces of wood to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1207—Heat-activated adhesive
-
- 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
- C09J161/04—Condensation polymers of aldehydes or ketones with phenols only
-
- 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
- C09J161/04—Condensation polymers of aldehydes or ketones with phenols only
- C09J161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
-
- 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
- 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
- C09J161/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
- C09J161/28—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds with melamine
-
- 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
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/04—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving separate application of adhesive ingredients to the different surfaces to be joined
-
- 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
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/06—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2317/00—Animal or vegetable based
- B32B2317/16—Wood, e.g. woodboard, fibreboard, woodchips
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Veneer Processing And Manufacture Of Plywood (AREA)
- Laminated Bodies (AREA)
Description
WO 03/066765 PCT/SE03/00195
I
METHOD OF JOINING WOOD BASED MATERIALS The present invention relates to a method of joining wood based materials wherein a curable adhesive composition and a composition comprising a gel forming substance are separately applied onto wood based materials. It also relates to wood based products made by the method.
Back.round of the invention Some processes of gluing wood based materials include a pre-pressing step followed by a hot-pressing step. This is particularly the case in gluing processes, such as manufacture of plywood and laminated veneer lumber, where a thermosetting adhesive is applied onto veneers, which are assembled and usually pre-pressed at room temperature forming an assembly of veneers. The assembly is then usually hot-pressed where the curing of the adhesive takes place. It is important that the veneers are sufficiently adhered to each other after the pre-pressing step so that the assembly is not disrupted thereby destroying its shape. If the veneers are insufficiently adhered to each other, the assembly may also get stuck in the hot-pressing equipment. Consequently, bad coldadhesion will lead to that some material cannot be used after pre-pressing, thus forming a waste.
When formulating a typical curable adhesive, various additives are usually mixed into a curable resin. The additives usually affect the pot life, which can be reduced from being up to several weeks for the resin alone, to only a few days or shorter for the formulated curable adhesive composition. Some additives lead to very short pot life which causes handling problems. Thus, problems with too short pot life are frequently present when formulating adhesive compositions.
In order to improve the cold-adhesion, additives such as cereal based materials including wheat flour, maize flour etc. are commonly used as components in curable adhesive compositions. However, cereal base additives can only be used up to a certain amount without thickening the adhesive composition too much. Also, different natural or synthetic polymers have been tested, but not giving any satisfactory improvement. Thus, the performance of the known additives for improving cold-adhesion is insufficient and there is a need for improving the cold-adhesion when joining wood based materials without causing problems with too short pot life.
When gluing together two surfaces, there exists a certain maximum assembly time available, i.e. the maximum length of time between application of the adhesive components and joining of the parts in, for example, a press. The assembly time must be sufficient long to enable assembling and adjusting of the parts to be glued in a practical way.
WO 03/066765 PCT/SE03/00195 2 WO 89/05221 discloses a method for the production of wood products where hardener is applied in a zone along edges of a veneer layer. However, due to the rapid hardener used, the assembly time before pre-pressing, will be very short. Also, the method according to WO 89/05221 may lead to variations of the quality of the adhesive bond between different parts of the adhesive bond, and more waste.
US Patent No. 4,824,896 discloses an adhesive for bonding wood pieces of high moisture content, which optionally includes borax. US Patent No. 2,889,241 discloses a phenolic resin composition comprising a boron oxygen compound, such as boric acid.
EP 0259042 A2 discloses the use of esters as curing agents for a phenol-formaldehyde resin. However, none of US 4,824,896, US 2,889,241 or EP 0259042 A2 discloses anything about cold-adhesion.
It is an object of the present invention to provide a method for joining wood based materials which gives excellent cold-adhesion, minimises pot life problems, and gives suffiient assemby times. The method being suiable or processes where a curable adhesive composition is used comprising a pre-pressing step and a hot-pressing step. It is a further object of the present invention to provide wood based products made by the method.
The invention According to the invention it has surprisingly been found possible to achieve the above mentioned objects by a method of joining two or more pieces of wood based materials, comprising the steps of: providing at least two pieces of wood based material; separately applying an adhesive composition comprising a curable resin, and a composition comprising a gel forming substance, onto at least one of said at least two pieces; joining the two pieces together to form an assembly having the compositions (A) and situated between the pieces; pre-pressing the obtained assembly, with no curing of the resin; and then hot-pressing the assembly to cure the resin.
According to the invention it has also surprisingly been found possible to achieve the above mentioned objects by a method of joining two or more pieces of wood based materials, comprising the steps of: providing at least two pieces of wood based material; separately applying an adhesive composition comprising a curable resin, and a composition comprising a gel forming, non-curing, substance, onto at least one of said at least two pieces; WO 03/066765 PCT/SE03/00195 3 joining the two pieces together to form an assembly having the compositions (A) and situated between the pieces; pre-pressing the obtained assembly; and then hot-pressing the assembly to cure the resin.
By "a gel forming substance" is herein meant a substance, which, by itself or by its derivatives, is able to make the adhesive composition according to the invention form a gel, but not to make any resin in adhesive composition significantly cure at the relatively low temperatures during pre-pressing, for example, at room temperature, 25 0 C, which is an example of a temperature range during pre-pressing.
By "curing" the resin is herein meant transforming the curable resin into a hardened, cross-linked, suitably solid, state.
By "pre-pressing", is herein meant pressing at a temperature below the required curing temperature of a thermosetting adhesive composition applied, so that no significant curing takes place during the pre-pressing time.
By "cold-adhesion" is herein meant the adhesion after pre-pressing between two surfaces having a thermosetting adhesive layer between the surfaces.
By "hot-pressing" is herein meant pressing at a temperature higher than the temperature at pre-pressing, at or over the required curing temperature of a thermosetting adhesive composition applied, so that the adhesive is cured.
A suitable curable adhesive composition according to the invention include any curable adhesive composition requiring an elevation in temperature to cure sufficiently fast. The adhesive composition may comprise more than one resin.
Suitably, the adhesive composition comprises a phenolic resin or a combination of an amino resin and a non-curable resin.
Phenolic resins are condensates of different phenolic compounds and aldehydes. A phenolic compound can be phenol itself, polyhydric phenols and alkyl phenols such as resorcinol, alkyl resorcinol, cresols, ethyl phenol and xylenol, and phenolic compounds of natural origin such as tannins. Examples of suitable aldehydes include formaldehyde, acetaldehyde, glutaraldehyde, propionaldehyde, n-butyraldehyde, isobutyraldehyde and furfural. A phenolic resin can exist as a solution in water, or alcohol such as ethanol. Suitably, the phenolic resin exists as an aqueous solution with varying dry content of resin. A phenolic resin used in the adhesive composition according to the invention is suitably a formaldehyde-based phenolic resin such as a phenolformaldehyde, a resorcinol-formaldehyde and a phenol-resorcinol-formaldehyde resin.
Preferably, the adhesive composition comprises a phenol-formaldehyde resin. The dry resin content in the phenolic resin is suitably from about 20 to about 80 weight WO 03/066765 PCT/SE03/00195 4 preferably from about 30 to about 60 weight most preferably from about 40 to about weight the remaining part of the resin preferably substantially being water. The molar ratio formaldehyde to total amount phenolic compounds (one or both of phenol and resorcinol) when making the resin is suitably from about 0.1 to about 4, for a phenolresorcinol-formaldehyde resin preferably from about 0.5 to about 1. For a phenolformaldehyde resin, the molar ratio phenol to formaldehyde is preferably from about 1 to about 3.
Amino resins are condensates of carbonyl compounds, such as aldehydes, with compounds containing amino, imino or amide groups such as urea, melamine, thiourea, guanamines, ethylene urea, cyanamide, dicyanodiamide and guanidine. Mostly, amino resins refer to condensates of formaldehyde and amine-containing compounds among which the most common ones are urea and melamine giving urea-formaldehyde and melamine-formaldehyde, and melamine-urea-formaldehyde. An amino resin used in the adhesive composition according to the invention is suitably a urea-formaldehyde resin or a melamine-formaldehyde resin. The dry resin content in the amino resin is suitably from about 30 to about 90 weight preferably from about 45 to about 80 weight most preferably from about 55 to about 75 weight the remaining part of the resin preferably substantially being water. The non-curable resin is suitably a polymer comprising polar groups, preferably a polyvinylester or therefrom derived polymers, most preferably polyvinylacetate or polyvinylalcohol. The amount of non-curable resin in the adhesive composition is suitably from about 0.1 to about 40 weight preferably from about to about 30 weight more preferably from about 1 to about 15 weight most preferably from about 2 to about 10 weight calculated as dry matter non-curable resin in the whole, non-dry, adhesive composition The amino resin is suitably cured by using conventional curing agents at elevated temperatures, suitably above preferably above 800C.
The adhesive composition can be formulated in any suitable way according to the state of the art. Suitably, the adhesive composition may comprise various additives, such as curing catalysts, and fillers, such as nutshell flour, or other starchcontaining substances known in the art. The suitable viscosity of the adhesive composition at application onto a surface of a wood based material depends on the application method used. The adhesive composition has suitably a Brookfield viscosity, at 25°C, of from about 100 to about 150000 cP, preferably from about 300 to about 50000 cP.
The gel forming substance is suitably a non-curing substance, by which is herein meant that a curable adhesive composition comprising the substance should not irreversibly cross-link at 20°C even after several hours. Examples of suitable gel forming WO 03/066765 PCT/SE03/00195 substances according to the invention include inorganic and organic gel forming substances. The inorganic gel forming substances include boron-containing compounds and metal ions. A boron-containing compound according to the invention preferably contains oxygen, most preferably the boron-containing compound is selected from the group of boric acid, borate salts, or a combination thereof. By a borate salt is herein included all types of borate salts such as metaborates, triborates, tetraborates etc. The boron-containing compound is suitably dissolved in water or organic solvents such as glycerol, ethylene glycol, diethylene glycol, methanol or ethanol. Preferably, the boroncontaining compound is dissolved in water. The metal ions are preferably belonging to group 3A, or, are transition metal ions belonging to any of groups 3B to 8B in the periodic table of elements, such as zinc, zirconium and chromium. The metal ions are suitably dissolved in water. If one or more inorganic gel forming substances are used, composition comprises the one or more gel-forming substances suitably in an amount of up to saturation of the ge forming substance, or substances, in the solvent used, suitably from about 0.01 to about 50 weight preferably from about 0.1 to about weight more preferably from about 0.5 to about 25 weight most preferably from about 1 to about 20 weight The organic gel forming substances according to the invention include compounds having an ester functional group. An organic gel forming substance is suitable when a phenolic resin is used in the adhesive composition Suitably, such a gel forming substance is selected from the group consisting of esters, lactones, organic carbonates, or mixtures thereof. Suitable esters include, but are not limited to, methyl formate, methyl acetate, ethyl acetate, N-butyl acetate, butylene glycol diacetate, ethylene glycol diacetate and glycerol triacetate (triacetetin). Also, other aliphatic C1-C4 monoesters can be used, such as methylformate, ethylformate, propylformate, butylformate, methylacetate, ethylacetate, butylacetate, propylacetate, methylpropionate, ethyl propionate, propylpropionate, butylpropionate, methylbutyrate, ethylbutyrate, propylbutyrate, propylbutyrate, methylpentanate, ethylpentanate, propylpentanate, butylpentanate. Also multiesters can be used such as ethylene glycol di-alkylester, diethylene glycol di-alkyl ester, propylene glycol di-alkyl ester, butylene glycol di-alkyl ester, glycerol alkyl ester, 1,3-propanediol alkyl ester, 1,3-butanediol alkyl ester, 1,4butanediol alkyl ester, where alkyl is C 1
-C
4 Suitable organic carbonates include, but are not limited to, propylene carbonate, ethylene glycol carbonate, glycerol carbonate, 1,2butanediol carbonate, 1,3-butanediol carbonate, 1,2-pentanediol carbonate, 1,3pentanediol carbonate. Preferably, propylene carbonate is used. Lactones include, but are not limited to, gamma-butyrolactone, beta-propiolactone, beta-butyrolactone, betaisobutyrolactone, beta-isopentylactone, gamma-isopentylactone, and delta-pentylactone.
WO 03/066765 PCT/SE03/00195 If an organic compound, such as a compound having an ester functional group, is used as the gel forming substance, composition suitably comprises from about 1 to about 100 weight preferably from about 10 to about 40 weight of gel forming substance.
The remaining part of composition is suitably substantially water.
Suitably, the Brookfield viscosity of an adhesive composition gelled by the gel forming substance at 20°C should decrease when the gel is moderately heated, for example, to 50°C. This indicates that the gelling is reversible and that no significant irreversible cross-linking in the adhesive composition has taken place.
The weight ratio of applied adhesive composition to applied composition (B) is suitably from about 100:1 to about 2:1, preferably from about 50:1 to about 5:1, most preferably from about 30:1 to about 10:1, calculated per unit area.
The application of the adhesive composition and composition can be made in optional order of application. Preferably, the adhesive composition is applied onto a surface before composition The application of the adhesive composition (A) and composition onto a wood based material can be made by using any suitable method known in the art, such as spraying, brushing, extruding, roll-spreading, curtaincoating etc. forming shapes such as droplets, one or several strands, beads or a substantially continuous layer. Preferably, the adhesive composition is applied by using extruding, roll-spreading or curtain-coating methods, while composition is preferably applied by spraying.
Suitably, from about 20 to about 100 of the surface subjected to application of adhesive composition is subjected to application of composition preferably from about 50 to about 100%, most preferably from about 80 to about 100 By "surface subjected to application" is herein meant the surface exposed to any application method, with no requirement of a certain degree of coverage of any of composition or In the method according to the invention, two or more pieces of wood based materials are joined forming an assembly of pieces, which is subjected to a pre-pressing step, suitably at ambient temperature, preferably at from about 0 to about 40°C, most preferably at from about 5 to about 30°C. The pre-pressing step according to the invention is suitably performed at a pressure of from about 1 to about 50 kg/cm 2 preferably from about 2 to about 25 kg/cm 2 most preferably from about 4 to about kg/cm 2 The pre-pressing time depends on the resin used and the type of assembly to be pressed and is suitably from about 0.1 to about 30 minutes. For a phenolic resin, the prepressing time is preferably from about 0.1 to about 15 minutes, even more preferably from about 1 to about 10 minutes, most preferably from about 3 to about 5 minutes. For an amino resin, the pre-pressing time is preferably from about 5 to about 30 minutes, most preferably from about 8 to about 15 minutes.
WO 03/066765 PCT/SE03/00195 7 The assembly of pieces is further subjected to a hot-pressing step, which is suitably at a temperature at or above the curing temperature of the adhesive composition The hot-pressing step according to the invention is suitably performed at a pressure of from about 1 to about 50 kg/cm 2 preferably from about 2 to about 25 kg/cm 2 most preferably from about 4 to about 15 kg/cm 2 The temperature in the hot-pressing step depends on the resin used and is suitably from about 50 to about 200°C. For a phenolic resin, the hot-pressing temperature is suitably from about 80 to about 200°C, preferably from about 120 to about 170°C. For an amino resin, the hot-pressing temperature is suitably from about 50 to about 150 0 C, preferably from about 90 to about 130°C. The hotpressing time depends on the resin and the thickness of the assembly, and is suitably from about 0.01 to about 5 minutes per mm thickness of the assembly, preferably from about 0.1 to about 2 minutes per mm thickness of the assembly, most preferably from about 0.2 to about 1 minutes per mm thickness of the assembly.
In one preferred embodiment of the inventionn, a curable adhesive composition comprising a phenolic resin is applied onto veneers of wood whereupon a composition comprising boric acid is applied onto the applied adhesive composition. Two or more veneers are pre-pressed forming an assembly, which is thereafter hot-pressed, thereby curing the adhesive composition.
In another preferred embodiment of the invention, a curable adhesive composition comprising a combination of an amino resin and a polyvinylester is applied onto veneers of wood whereupon a composition comprising boric acid is applied onto the applied adhesive composition. Two or more veneers are pre-pressed forming an assembly, which is thereafter hot-pressed, thereby curing the adhesive composition.
The wood based materials according to the method of the invention can be of any kind that can be joined by an adhesive system. Preferably, the wood-based materials are veneers or other wood based sheets.
The wood based products obtainable by the method according to the invention can be of any kind where a pre-pressing step is suitable, examples of such products are plywood, laminated veneer lumber, and flooring materials.
The invention will now further be described in connection with the following examples which, however, not should be interpreted as limiting the scope of the invention.
Examples Example 1: The method according to the invention was tested by gluing veneers into a twoply panel with a standard adhesive composition made of 100 parts by weight of phenolformaldehyde resin, 1 part of sodium carbonate, 9 parts of wheat flour and 5 parts of WO 03/066765 PCT/SE03/00195 8 water. The resin had a dry content of 45 weight The formulated adhesive composition had a Brookfield viscosity at 25 0 C of about 3000 cP. The veneers tested were Radiata Pine of 3 mm thickness. The adhesive composition was applied by extrusion into strands in an amount of 220 g/m 2 A composition according to the invention was made comprising about 5 weight sodium tetraborate decahydrate and about 95 weight of water. Composition was sprayed onto the applied adhesive composition in an amount of about 10 g/m 2 The pre-pressing was made at a pressure of 10 kg/cm 2 and at a temperature of 21-25°C for 60 seconds. Three identical test panels were made and tested. The amount of surface on top and bottom of the two-ply panel that had separated ("released") from each other was recorded after 30 minutes. Release values of 100% means total separation while 0 means that the veneers are still sticking together.
Table 1.
Sample Release at 30 min 1 0 2 3 Comparative example: A test was made as in Example 1, but without spraying composition onto the applied adhesive.
Table 2.
Sample Release at 30 min 1 2 100 3 100 Average:98 It is concluded that separate application of the components according to the invention gives a significant improvement in cold-adhesion.
WO 03/066765 PCT/SE03/00195 9 Example 2: Samples of a PF resin, and a combination of a UF- resin and a polyvinylalcohol (PvAI) were tested with a gel forming substance according to the invention, and a citric acid hardener (for UF) according to WO 89/05221. 15 g of a composition comprising either 10 weight gel forming substance or 20 weight hardener according to WO 89/05221, was mixed with 180 g of an adhesive comprising either a PF resin or a UF/PvAI resin system. The UF/PvAI system also comprised a conventional hardener, and the relations of the components were 100 parts UF, 6 parts PvAI (17 weight and parts hardener. Thereafter, the mixture was allowed to rest for 1 minute at 20°C after which the appearance and viscosity were noted. Thereafter, the temperature was quickly raised to about 50°C and the appearance and the viscosity of the sample were again noted.
Table 3.
Brookfield viscosity and/or appearance Added substance PF 20 0 C PF 50 0 C UF/PvAI 20°C UF/PvAI Sodium tetraborate 30000 cP 3000 cP 50000 cP 5000 cP decahydrate (gel) (fluid) (gel) (fluid) boric acid (1:1) Citric acid >500000 cP hard/brittle aluminium sulphate (hard gel) (WO 89/05221) combination not relevant to test It is concluded that the gel forming substances according to the invention do not irreversibly cross-link the resins at room temperature. Furthermore, a combination of a citric acid/ aluminium sulphate hardener, according to WO 89/05221, with UF/PvAI gives a hard gel already after 1 minute at 20°C, and which does not soften when heated, indicating irreversible curing.
10 In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the word "comprise" or variations such as "comprises" or "comprising" is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.
It is to be understood that, if any prior art publication is referred to herein, such reference does not constitute an admission that the publication forms a part of the common general knowledge in the art, in Australia or any other country.
H:\jolzik\keep\Speci\2003206319 amended pages.doc 21/02/2006
Claims (16)
1. A method of joining two or more pieces of wood based materials, comprising the steps of: providing at least two pieces of wood based material; separately applying an adhesive composition comprising a curable resin, and a composition comprising a gel forming substance, onto a surface of at least one of said at least two pieces; joining the two pieces together to form an assembly having the compositions and situated between the pieces; pre-pressing the obtained assembly, with no curing of the resin; and then, hot-pressing the assembly to cure the resin.
2. A method of joining two or more pieces of wood based materials, comprising the steps of: providing at least two pieces of wood based material; separately applying an adhesive composition comprising a curable resin, and a composition comprising a gel forming, non-curing, substance, onto a surface of at least one of said at least two pieces; joining the two pieces together to form an assembly having the compositions and situated between the pieces; pre-pressing the obtained assembly, and then, hot-pressing the assembly to cure the resin.
3. A method according to any one of claims 1-2, c h a r a c t e r i s e d in that the adhesive composition (A) is applied before composition H:\jolzik\keep\Speci\2003206319 amended pages.doc 21/02/2006 12
4. A method according to any one of claims 1-3, characterised in that the wood based material is a veneer.
A method according to any one of claims 1-4, cha r a c t e r i s e d in that the adhesive composition (A) comprises a phenolic resin.
6. A method according to any one of claims 1-4, c ha r a c t e r i s e d in that the adhesive composition (A) comprises a combination of polyvinylacetate or polyvinylalcohol and an amino resin.
7. A method according to claim 6, characterised in that the amino resin is a urea- formaldehyde resin or a melamine-formaldehyde resin.
8. A method according to any one of claims 1-7, characterised in that the gel-forming substance is boric acid, a borate salt, or a combination thereof.
9. A method according to claim cha r a c t e r i s ed in that the gel forming substance is a metal ion belonging to group 3A, or a transition metal ion belonging to any of groups 3B to 8B, in the periodic table of elements.
A method according to any one of claims 8-9, chara c t e r i s e d in that composition comprises from 0.5 to about 30 weight of gel forming substance.
11. A method according to claim characterised in that the gel forming substance is selected from the group consisting of esters, lactones, organic carbonates, or mixtures thereof.
12. A method according to claim 11, characterised in that composition comprises from 10 to about 40 weight of gel forming substance.
13. A method according to any one of claims 1-12, characterised in that the weight ratio applied H:\jolzik\keep\Speci\2003206319 amended pages.doc 21/02/2006 13 adhesive composition to applied composition is from 30:1 to about 10:1, calculated per unit area.
14. A wood based product obtained by the method according to any one of claims 1-13.
15. A wood based product according to claim 14, which is plywood, laminated veneered lumber, or a flooring material.
16. A method of joining two or more pieces of wood based materials, and/or a wood based product obtained by said method, substantially as herein described with reference to the examples herein. Dated this 21st day of February 2006 AKZO NOBEL COATINGS INTERNATIONAL B.V. By their Patent Attorneys GRIFFITH HACK Fellows Institute of Patent and Trade Mark Attorneys of Australia H:\jolzik\keep\Speci\2003206319 amended pages.doc 21/02/2006
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EP02445018 | 2002-02-07 | ||
EP02445018.1 | 2002-02-07 | ||
PCT/SE2003/000195 WO2003066765A1 (en) | 2002-02-07 | 2003-02-05 | Method of joining wood based materials |
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AU2003206319B2 true AU2003206319B2 (en) | 2006-03-09 |
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EP (1) | EP1472321A1 (en) |
JP (1) | JP2005517076A (en) |
CN (1) | CN1257242C (en) |
AU (1) | AU2003206319B2 (en) |
BR (1) | BR0307423A (en) |
CA (1) | CA2475117A1 (en) |
PL (1) | PL370089A1 (en) |
RU (1) | RU2272060C2 (en) |
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---|---|---|---|---|
RU2458954C2 (en) * | 2006-06-23 | 2012-08-20 | Акцо Нобель Коатингс Интернэшнл Б.В. | Adhesive system and method of obtaining wood-based product |
GB2462619A (en) * | 2008-08-13 | 2010-02-17 | Dynea Austria Gmbh | Two-component adhesive system |
KR100940933B1 (en) * | 2009-07-27 | 2010-02-08 | (주)대협테크 | Binder composition for spary |
JP5361700B2 (en) * | 2009-12-24 | 2013-12-04 | 株式会社サンベーク | Wood adhesive composition and plywood |
RU2488609C1 (en) * | 2012-05-22 | 2013-07-27 | Общество с ограниченной ответственностью "Новохим" | Adhesive composition |
RU2605134C2 (en) * | 2012-07-13 | 2016-12-20 | Акцо Нобель Коатингс Интернэшнл Б.В. | Adhesive system |
WO2016198705A1 (en) * | 2015-06-12 | 2016-12-15 | Grupo Garnica Plywood, S.A. | Tabletop for manufacturing caravan furniture and method for producing said tabletop |
CN106333530A (en) * | 2016-08-29 | 2017-01-18 | 广西横县正林木业有限公司 | Method for producing cabinet board by adopting flame-retardant composite urea resin |
IT201700094824A1 (en) * | 2017-08-21 | 2019-02-21 | Tecnoform Spa | METHOD FOR THE PRODUCTION OF CURVED COMPONENTS FROM FURNITURE AND COMPONENT SO OBTAINABLE |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US3929695A (en) * | 1973-01-29 | 1975-12-30 | Sumitomo Durez Co | Phenolic resin adhesives containing resorcinol, formaldehyde and an alkali metal carbonate |
WO1989005221A1 (en) * | 1987-12-07 | 1989-06-15 | Casco Nobel Ab | A method for the production of wood products |
-
2003
- 2003-02-05 PL PL03370089A patent/PL370089A1/en not_active Application Discontinuation
- 2003-02-05 EP EP03703610A patent/EP1472321A1/en not_active Withdrawn
- 2003-02-05 WO PCT/SE2003/000195 patent/WO2003066765A1/en active Application Filing
- 2003-02-05 BR BR0307423-4A patent/BR0307423A/en not_active IP Right Cessation
- 2003-02-05 AU AU2003206319A patent/AU2003206319B2/en not_active Ceased
- 2003-02-05 CN CN 03803407 patent/CN1257242C/en not_active Expired - Fee Related
- 2003-02-05 CA CA002475117A patent/CA2475117A1/en not_active Abandoned
- 2003-02-05 JP JP2003566122A patent/JP2005517076A/en active Pending
- 2003-02-05 RU RU2004126846/04A patent/RU2272060C2/en not_active IP Right Cessation
- 2003-05-02 UA UA20040907273A patent/UA78545C2/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3929695A (en) * | 1973-01-29 | 1975-12-30 | Sumitomo Durez Co | Phenolic resin adhesives containing resorcinol, formaldehyde and an alkali metal carbonate |
WO1989005221A1 (en) * | 1987-12-07 | 1989-06-15 | Casco Nobel Ab | A method for the production of wood products |
Also Published As
Publication number | Publication date |
---|---|
EP1472321A1 (en) | 2004-11-03 |
JP2005517076A (en) | 2005-06-09 |
AU2003206319A1 (en) | 2003-09-02 |
RU2272060C2 (en) | 2006-03-20 |
CN1628162A (en) | 2005-06-15 |
UA78545C2 (en) | 2007-04-10 |
RU2004126846A (en) | 2005-06-10 |
WO2003066765A1 (en) | 2003-08-14 |
BR0307423A (en) | 2004-12-28 |
CN1257242C (en) | 2006-05-24 |
CA2475117A1 (en) | 2003-08-14 |
PL370089A1 (en) | 2005-05-16 |
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