Patent · US Active

Modified phenolic novolak resins and applications thereof

US7498371B2 · kind B2 · utility

16Cited by

10References

47Claims

0Family size

Inventors

Raj B. Durairaj · Monroeville, US
C. Michael Walkup · New Kensington, US
Mark A. Lawrence · Mesa, US

Key dates

Filing date	Sep 23, 2005
Grant date	Mar 3, 2009
Priority date	—
Expiry date	Nov 25, 2026

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L61/32
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A modified phenolic novolak resin is prepared by reacting a phenolic compound (e.g., resorcinol) with an aliphatic polyol. The reaction mixture further reacts with a formaldehyde to produce a modified phenolic novolak resin. The reaction is typically carried out in the presence of an acid or a base catalyst. The resulting resin is characterized by a relatively low level of free resorcinol; and rubber compounds containing the resin exhibit low fuming, lower Mooney viscosity (which means better processing), better dynamic stiffness properties (G′), and/or good tear properties. Therefore, the resulting resin can be used as a methylene acceptor compound in a vulcanizable rubber composition.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.