C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/1401, 154/95
C08L 61/24 (2006.01) B32B 21/00 (2006.01) C08G 12/12 (2006.01) C08G 12/40 (2006.01) C08L 97/00 (2006.01) C08L 97/02 (2006.01) C09J 161/24 (2006.01) C09J 197/00 (2006.01)
Patent
CA 1117693
SULFITE SPENT LIQUOR - UREA FORMALDEHYDE RESIN ADHESIVE PRODUCT ABSTRACT An adhesive product particularly suitable for use in the manufacture of wood particle board comprises from 50-90 parts by weight urea formaldehyde resin and from 10-50 parts by weight spent liquor from the acid sulfite pulping of lignocellulose, the adhesive product containing from 0.2 to 4.0% by weight ammonium ion (expressed as NH3) based on the spent liquor solids. The sulfite spent liquor component of the mixture prior to mixing has a pH of from 3-9; the urea formaldehyde resin prior to mixing, a pH of from 6 to 8. The urea formaldehyde resin is further characterized by a molar ratio of formaldehyde to urea of from 1.0 to 1.8, and a methylol content corresponding to a Witte number of from 1.0 to 1.8. Glued wood products such as wood particle board are made using the hereindescribed adhesive by applying to the surface of wood particles a bonding quantity of the fore- going adhesive, assembling the adhesive-coated pieces, and hot pressing the resulting assembly to cure the adhe- sive and bond the pieces together. -1-
319909
Edler & Company Fargindustri Ab
Gowling Lafleur Henderson Llp
LandOfFree
Method of manufacture of adhesive products does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of manufacture of adhesive products, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of manufacture of adhesive products will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-808170