Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Reexamination Certificate
2011-04-05
2011-04-05
Kiliman, Leszek (Department: 1788)
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
C428S331000, C428S403000, C428S404000, C428S405000, C428S406000, C428S407000, C523S139000, C523S145000, C523S201000
Reexamination Certificate
active
07919179
ABSTRACT:
To provide resin-coated sand for a multilayer mold in which the consolidation strength of the casting mold obtained by using it and gas permeability thereof are improved at the same time, the amount of occurrence of pyrolytic products (tar, soot and the like) derived from organic substances is effectively inhibited, when molding is performed using such a casting mold, and further, the casting mold after molding can exhibit excellent collapsibility. Disclosed is resin-coated sand for a multilayer mold, in which surfaces of refractory particles are coated with a binder composition containing a phenolic novolak resin having an ortho/para bond ratio of methylene groups of 1.5 or more and an aromatic amine as indispensable constituents, and the grain fineness number is from 80 to 150.
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Furusawa Hiroshi
Shibata Naohisa
Totsuka Masanori
Asahi Organic Chemicals Industry Co. Ltd.
Burr & Brown
Honda Motor Co. Ltd.
Kiliman Leszek
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