novolac resin

novolac resin

[′nō·və‚lak ′rez·ən]
(materials)
Any of the thermoplastic phenol-formaldehyde resins made with an excess of phenol in the reaction; used in varnishes.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Novolac resin is a phenol-formaldehyde resin and was created in our laboratory by progressive polymerization and polycondensation mechanism.
Key statement: A tire component comprising a rubber composition having a highly unsaturated diene elastomer and a reinforcing filler with a first methylene acceptor selected from 3-hydroxydiphenylamine, 4-hydroxydiphenylamine or combinations thereof; a second methylene acceptor selected from a Novolac resin, diphenylolmethane, diphenylolethane diphenylolpropane, diphenylolbutane, a naphthol, a cresol or combinations thereof and a methylene donor.
In this study novolac resin and poly vinyl alcohol are used for the first time as anti-agglomeration agents for preventing urea agglomeration.
Phenolic novolac resin hardener (PN, hydroxyl equivalent weight: 105 g/eq) was supplied by Momentive Chemical Co., Ltd.
Abstract The present research work focuses on the mechanical, chemical, and curing characteristics of novolac resin based on renewable resource materials such as cardanol and furfural.
To overcome the challenges involved in installing flooring within this area, the MAIS team used fiberglass mesh reinforcement, epoxy novolac resin in each of the pits and the trenches and then completed the installation of a seamless monolithic surface from the top of the curbing to the floor drains.
In the prior works attempt insertion of azo group in phenol novolac resin at a molecular level has recently been shown to impart improvements in thermal properties, mechanical properties, flame retardance, and char yields in cured epoxy resins [23, 24].
Process for production of production of wood composites using a mixed pMDI/solid novolac resin binder.
The at least one silane can include a bis-amino silane, a vinyl silane, a bis-sulfur silane or mixtures thereof, and the polymeric resin may include an epoxy resin, acrylate resin, polyurethane resin, novolac resin, or mixtures thereof.
A fusible (meltable) novolac resin is formed by cooking a phenol and a for-maldehyde blend in a reactor where the amount of formaldehyde is "shorted." The cooking is done in an acid medium and is continued until a predetermined solids content is reached.
Mixed pMDI/solid novolac resin binders for the production of wood composite products.
(ii) A trifunctional novolac resin, DEN 431, which is produced by Dow, having an epoxy equivalent weight of 172-179 and an average functionality of 2.8.