Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1984-12-21
1986-06-10
Ivy, C. Warren
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524 60, 524 65, 524 74, 524 78, 524735, 524841, 525 545, 527403, 527503, 528 1, C10F 900, C09J 314, C08L 6112
Patent
active
045943842
ABSTRACT:
The present invention relates to an adhesive composition for manufacturing glued laminated beams and wood constructions. One component of the adhesive composition is resorcinol-phenol resin. Resorcinol-phenol adhesives are as such known in the prior art. The main ingredients of these adhesives are resorcinol, formaldehyde and phenol. Among the drawbacks in the use and production of resorcinol-phenol adhesives are their high price and the fact that the raw materials are difficult to obtain. The purpose for employing the adhesive composition of the invention is to eliminate some of the difficulties connected with the availability of the raw materials, particularly resorcinol, and to help produce a new, more economical resorcinol-phenol based adhesive composition. Part of the resorcinol-phenol resin used in the adhesive composition is replaced by a humus substance extract made of peat, preferably decomposed peat, or by a commixture made of humus substance extract and formaldehyde, providing an adhesive composition according to the invention which contains 40-90% by weight resorcinol-phenol resin, the dry matter content whereof is 30-60% by weight and 10-60% by weight humus substance extract made from peat. Into this adhesive composition there is added, before use, some generally known hardener such as formaldehyde at 5-20% by weight. Into the humus substance extract of the adhesive composition may be added 10-20% by weight formaldehyde.
REFERENCES:
patent: 3293200 (1966-12-01), MacGregor
patent: 3294715 (1966-12-01), Bryner
patent: 3533988 (1970-10-01), Morris
patent: 4514532 (1985-04-01), Hsu
Rose, The Condensed Chemical Dictionary, 7th edition; pp. 483, 556.
Kankaanpaa Pentti
Kilpelainen Harri
Ivy C. Warren
Valtion teknillinen tutkimuskeskus
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