Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Reexamination Certificate
2011-07-12
2011-07-12
Tucker, Philip C (Department: 1745)
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
C156S307300, C428S425100
Reexamination Certificate
active
07976668
ABSTRACT:
The present invention relates to a process for the production of wood-base materials which have at least one thin veneer layer adhesively bonded over the surface to a substrate or to further veneer layers, which process comprises the following steps:i. impregnation of a veneer with an aqueous curable composition which comprisesa) at least one curable urea compound selected from urea compounds H which have at least one N-bonded group of the formula CH2OR, where R is hydrogen or C1-C4-alkyl, and/or a 1,2-bishydroxyethane-1,2-diyl group bridging the two nitrogen atoms of the urea, precondensates of the urea compound H, and reaction products or mixtures of the urea compound H with at least one alcohol which is selected from C1-C6-alkanols, C2-C6-polyols and oligoethylene glycols, andb) at least one catalyst K effecting crosslinking of the urea compound;ii) gluing of the impregnated veneer and/or the substrate with a glue composition andiii) processing of the glued veneer to give a wood-base material at elevated temperature with curing of the crosslinkable urea compound,the impregnated veneer comprising the crosslinkable urea compound in substantially uncrosslinked form before the gluing in step ii).
REFERENCES:
patent: 2398649 (1946-04-01), Kvalnes
patent: 2452200 (1948-10-01), Kvalnes
patent: 3493417 (1970-02-01), Moren
patent: 3931088 (1976-01-01), Sakurada et al.
patent: 4396391 (1983-08-01), North
patent: 2501053 (2004-04-01), None
patent: 34 32 135 (1986-03-01), None
patent: 199 25 865 (2001-01-01), None
patent: 0 903 451 (1999-03-01), None
patent: 600 961 (1948-04-01), None
patent: 2004 033171 (2004-04-01), None
U.S. Appl. No. 12/088,702, filed Mar. 31, 2008, Kingma, et al.
U.S. Appl. No. 12/089,209, filed Apr. 4, 2008, Kingma, et al.
U.S. Appl. No. 11/817,511, filed Aug. 31, 2007, Baus, et al.
Kingma Arend Jouke
Krause Andreas
Militz Holger
Weingart Franz
Wepner Falko
BASF - Aktiengesellschaft
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Orlando Michael N
Tucker Philip C
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