Abrasive articles and method for preparing them
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United States of America Patent
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Nov 2, 1999
Issued Date -
N/A
app pub date -
Apr 25, 1997
filing date -
Nov 2, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A continuous method for preparing a granular molding material for abrasive articles has been developed. The method includes the step of continuously blending an abrasive material with a curing agent and measured portions of phenol-novolac resins, at least one of which has a phenol-formaldehyde molar ratio in the range of about 1:0.2 to 1:0.35. The resulting product is a flowable, granular material homogeneously coated with the phenol-novolac resins. The product can be directly molded, i.e., without an aging step, into various improved abrasive articles, such as grinding wheels, comprising a homogeneous distribution of abrasive grain and having a low volatile organic chemical content.
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