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EPOXY NOVOLAC RESINS HAVING REDUCED 2-FUNCTIONAL COMPONENTS AND A PROCESS FOR REDUCING 2-FUNCTIONAL COMPONENTS IN NOVOLAC RESINS
EPOXY NOVOLAC RESINS HAVING REDUCED 2-FUNCTIONAL COMPONENTS AND A PROCESS FOR REDUCING 2-FUNCTIONAL COMPONENTS IN NOVOLAC RESINS
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机译:减少了两官能度的环氧树脂酚醛清漆树脂的方法和减少了降酚醛的两官能度化合物的方法
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摘要
Epoxy novolac resins having reduced 2-functional components and a process for reducing 2-functional components in novolac resin 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 resin, 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 temperature. These resins are useful in the preparation of composites, molding, castings, coating, adhesives and laminates.
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