Difference between revisions of "Novolac"
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== Description == | == Description == | ||
| − | A thermoplastic [ | + | A thermoplastic [[phenol%20formaldehyde%20resin|phenol formaldehyde resin]] made in a two step process. The first step involves mixing [[formaldehyde|formaldehyde]] with excess [[phenol|phenol]] to form a brittle, thermoplastic [[phenolic%20resin|phenolic resin]]. Novolac is then crosslinked to produce an insoluble, thermoset material. This is done by reaction with epichlorohydrin, hexamethylenetetramine (hexa), or p-formaldehyde. Novolac has been made into fibers (novoloid) and used a high strength adhesive (Novolac® DEN 438). |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
Revision as of 09:49, 10 May 2016
Description
A thermoplastic Phenol formaldehyde resin made in a two step process. The first step involves mixing Formaldehyde with excess Phenol to form a brittle, thermoplastic Phenolic resin. Novolac is then crosslinked to produce an insoluble, thermoset material. This is done by reaction with epichlorohydrin, hexamethylenetetramine (hexa), or p-formaldehyde. Novolac has been made into fibers (novoloid) and used a high strength adhesive (Novolac® DEN 438).
Synonyms and Related Terms
novolac; novolak; novoloid fiber; phenol formaldehyde resin; Novolac®; Kynol®
Other Properties
Soluble in ethanol.
Sources Checked for Data in Record
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 297
- Theodore J. Reinhart, 'Glossary of Terms', Engineered Plastics, ASM International, 1988
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Marjory L. Joseph, Introductory Textile Science, Holt, Rinehart and Winston, Fort Worth, TX, 1986