SUMILITERESIN® PR-2217 I is a bis-phenol-A modified novolak phenolic resin. It is generally apply for foundry.
Characteristics SUMILITERESIN® PR-2217 I is a novolac phenolic resin modified with Bisphenol-A which has good properties for foundry manufacture. Beside modified bisphenol-A, It is designed in low molecule number and low free phenol monomer in order to get high strength, low thermal expansion and low gas volume. It is preferable add hexamine about 15%/resin when applied in resin coated sand (RCS).