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
1994-10-25
1996-06-25
Clark, W. Robinson H.
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...
428278, 428260, 428524, 525485, C08K 330, C08L 6110
Patent
active
055300480
ABSTRACT:
The present invention is directed to a phenolic resin composition useful for preparing a binder for reinforced composites, to a binder for reinforced composites made using the phenolic resin composition, and to a reinforced composite made using the binder. The phenolic resin composition of the present invention contains an aqueous mixture of: (a) a resole formed by reacting phenol with formaldehyde at a mole ratio of formaldehyde to phenol ranging from about 0.6:1 to about 4:1 and (b) a sulfite or bisulfite, wherein the resole has a pH at least about 7 and less than 9.5 and the composition contains from about 0.007 to about 0.4 mole equivalent of sulfur per mole of phenol.
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Knudsen Mark J.
McDonald Roderick A.
Clark W. Robinson H.
Georgia-Pacific Resins Inc.
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