Mark J Knudsen

US Patent:

55300480, Jun 25, 1996

Filed:

Oct 25, 1994

Appl. No.:

8/328815

Inventors:

Roderick A. McDonald - Bothell WA
Mark J. Knudsen - Seattle WA

Assignee:

Georgia-Pacific Resins, Inc. - Atlanta GA

International Classification:

C08K 330
C08L 6110

US Classification:

524418

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.

US Patent:

52908437, Mar 1, 1994

Filed:

Apr 29, 1993

Appl. No.:

8/053137

Inventors:

Roderick A. McDonald - Bothell WA
Mark J. Knudsen - Seattle WA

Assignee:

Georgia-Pacific Resins, Inc. - Atlanta GA

International Classification:

C08K 714
C08K 338

US Classification:

524405

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 in the presence of an ortho directing catalyst at a mole ratio of formaldehyde to phenol ranging from about 0. 7:1 to about 3:1 and (b) a water-soluble borate, wherein the composition contains at least about 0. 02 equivalent of the ortho directing catalyst per mole of phenol, has a pH at least about 7 and contains from about 0. 02 to about 0. 5 mole borate per mole of phenol.