Novolak - Wikipedia
网页Novolaks (sometimes: novolacs) are low molecular weight polymers derived from phenols and formaldehyde. They are related to Bakelite, which is more highly crosslinked. The term comes from Swedish "lack" for lacquer and Latin "novo" for new, since these materials were envisioned to replace natural lacquers such as copal resin.
Phenol formaldehyde resin - Wikipedia
网页Segment of a novolak, illustrating the predominance of cresol subunits and presence of crosslinking. Novolaks (or novolacs) are phenol-formaldehyde resins with a formaldehyde to phenol molar ratio of less than one. In place of phenol itself, they are often produced from cresols (methylphenols).
Novolac Phenolic Resin - an overview | ScienceDirect Topics
网页Indeed, novolac resins are well-known for their good mechanical properties and good flame resistance, which are attributed to their highly aromatic structures and to the inhibiting effect of their phenolic compounds.
Phenolic Novolac And Resol Resins - Plenco
网页Plenco liquid phenolic resol resins with low free phenol and low free formaldehyde contents are available especially for use in adhesive applications. Plastics Engineering Company can also supply low ash content, soluble solid resol resins, and of course a wide range of novolac resin-hexa systems.
Epoxy Novolac Resins and Solutions
网页Epoxy Novolac Resins for Increased Heat and Chemical Resistance. High-functional EPIKOTE™ and EPON™ Epoxy Novolac (EN) Resins are specifically designed to: Increase glass transition temperature (Tg) Improve thermal resistance. Improve mechanical resistance. Improve chemical resistance.
The structure and viscoelasticity of novolac resins | Polymer ...
网页2014年5月28日 · Novolacs are phenol–formaldehyde resins with a formaldehyde-to-phenol molar ratio of less than one and are prepolymers for cured phenolic resins. Polymerization is completed using acid...
Novolac Resins That Perform - Olin Epoxy
网页Multi-functional (±2.8) epoxy novolac resin of lower molecular weight for application where solvents cannot be tolerated and application viscosity (temperature) needs to remain relatively low. Used in adhesives, electrical and structural laminates and castings for elevated temperature service and excellent chemical resistance.