Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1997-11-03
1999-09-14
Jagannathan, Vasu
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525516, 524421, 524423, 524428, 524596, 528163, C08G 810, C08G 828, C08G 1410, C08L 6106, C08L 6114, C08L 6134
Patent
active
059524405
ABSTRACT:
A curable, alkaline, melamine modified phenol-formaldehyde resin is prepared from an initial phenol-formaldehyde resole resin containing from 0.5 to 2.5 percent of free formaldehyde by scavenging formaldehyde with 1 to 12 parts of melamine for each 100 parts of the initial resin wherein the molar ratio of formaldehyde to melamine is 0.2 to 1.5 moles of formaldehyde for each mole of melamine to reduce the free formaldehyde to less than 70% of that in the initial resin and prepare a storage stable resin which contains less than 0.7% of free formaldehyde and which maintains its stability under application conditions. An ammonium salt of strong acid and additional water is incorporated in the melamine modified resin to prepare an alkaline binder. The binder is sprayed on to fiberglass with low formaldehyde emissions, good stability and rapid cure in the acid range.
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U.S. Ser. No. 08/704, 259 of Aug. 28, 96 to Wayne R. Walisser .
Johnson Calvin K.
Walisser Wayne R.
Borden Chemical, Inc.
Jagannathan Vasu
Maskas George P.
Shosho Callie
Van Wyck Kenneth P.
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