Phenol resorcinol adhesive
(Cascophen LT-75C) 100 parts Hardener (Cascoset FM-282) 15-17 parts Operational time at room temperature (21[degrees]C) 2.5 h Viscosity 150-170 cPs Clamp time (21[degrees]C-24[degrees]C) 9 h Resin solid content (%) (a) 21 (a) At 6:1 PRF resimhardener ratio.
Two types of adhesives were prepared, one is Resorcinol Adhesive
, and the other is Polyurethane Adhesive.
The cants were then quartered, the exterior surfaces heat treated, resorcinol adhesive
was applied, and the quarters aimed inside-out and clamped together.
Previous studies of the ISO process to produce 4 by 4's (9,16) have used four pieces, required surface heating for a resorcinol adhesive
, and special clamping systems.
The HMR dramatically increased the wet wood failure and resistance to delamination of polyurethanes that were found deficient in the previous study, to levels comparable with the highly durable resorcinol adhesive
. One-part polyurethane adhesives met the strength and durability req uirements of the most rigorous of tests, specifically American Society for Testing and Materials (ASTM) standard D 2559 , when wood surfaces were primed with the HMR coupling agent.
PRF adhesives were introduced to help lower the high cost of ambient-curing resorcinol adhesives
The presented database comprises test results on the creep behavior of nine different PU adhesives, five EPI adhesives, and two phenolic resorcinol adhesives
used for reference purposes and not differentiated within the following.
. In: Handbook of Adhesive Technology.
Additional surface preparation is not required for OSB panels when manufacturing glued splice joints using resorcinol adhesives
. Factory surfaces and a 1 MPa clamping pressure are adequate for producing good quality glue bond.
. Handbook of Adhesive Technology.