Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1979-05-30
1980-12-16
Woodberry, Edward M.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
264118, 264219, C08L 500
Patent
active
042396654
ABSTRACT:
Resins for use in making resin-coated granules are made by preparing a novolak resin from a phenol and formaldehyde in the presence of lactose and/or galactose, using an acid catalyst. Melt-coating the resin with an amine curing agent on to particulate refractory material gives resin-coated granules which can be moulded to make foundry moulds. The lactose and/or galactose can replace part of the phenol conventionally employed in preparing novolak resins and avoids the need for plasticizers.
REFERENCES:
patent: 1593342 (1926-07-01), Meigs
patent: 1815930 (1931-07-01), Novotny et al.
patent: 2362086 (1944-11-01), Myers et al.
patent: 3865616 (1975-02-01), Akerblom
patent: 4020027 (1977-04-01), Nicholas
patent: 4048127 (1977-09-01), Gibbons et al.
patent: 4058403 (1977-11-01), Funabiki et al.
C.A. 68:30756x, Resin-coated granular refractories, Lemon et al.
Khan Riaz A.
Richards Alan C.
Talres Development (N.A.) N.V.
Woodberry Edward M.
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