Phenolic modified resorcinolic resins for rubber compounding
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United States of America Patent
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Dec 7, 2004
Grant Date -
Jun 17, 2004
app pub date -
Feb 18, 2003
filing date -
Dec 13, 2002
priority date (Note) -
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Abstract
A vulcanizable rubber composition comprises (a) a rubber component; (b) a methylene donor compound; and (c) a methylene acceptor comprising a blend of a high ortho-ortho bonded phenolic novolak resin and a resorcinolic resin. The resin blend can be made by a number of methods. For example, it can be prepared by first reacting one or more phenolic compounds represented by the following formula: ##STR1## where R is selected from the group consisting of H, an alkyl group chain of 1-16 carbon atoms and an aralkyl group of 8-12 carbon atoms with an aldehyde in the presence of an ortho directing catalyst and then combining a resorcinol-formaldehyde novolak resin to obtain a phenolic and resorcinolic novolak resin blend.
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