No hexa shell sand
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United States of America Patent
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Jul 27, 2010
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N/A
app pub date -
Dec 27, 2006
filing date -
May 18, 2006
priority date (Note) -
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Abstract
A formulation and method of use for eliminating the use of hexa in shell sand encapsulation is disclosed. The composition of matter consists of standard novalac resins with the hexa component replaced by solid granular resole or curing agent. The preferred formulation and method of compounding is given. Trace elements of ammonia, phenol and the like are further reduced by the addition of a preferred 50:50 mix of an ammonia buffer and masking agent. The preferred compounds for the ammonia buffer and masking agent mix are given.
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