C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
402/40
C08L 63/04 (2006.01) C08L 61/06 (2006.01)
Patent
CA 1281842
ABSTRACT This invention is directed to epoxy novolac resins represented by the formula Image having reduced 2-functional components and to a process for reducing 2-functional components in novolac resins represented by the formula Image ( II) which may be used to prepare the epoxy novolac resins. when 2-functional and 3-functional components are present in an epoxy phenol-formaldehyde novolac resins, the weight ratio of the 2-functional component to the 3- functional component is less than 1.1:1. When 2- functional and 3-functional components are present in an epoxy cresol-formaldehyde novolac resin, the weight ratio of the 2-functional component to the 3-functional component is less than 0.5:1. The epoxy novolac resins of this invention when cured exhibit increased glass transition temperatures. These resins are useful in the preparation of composites, molding, castings, coating, adhesives and laminates.
499562
Bertram James L.
Cortez Fermin M.
Mccrary Avis L.
Walker Louis L.
Bertram James L.
Cortez Fermin M.
Mccrary Avis L.
Smart & Biggar
The Dow Chemical Company
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