Patent · US Active

Process for the preparation of novolac alkylphenol resins

US10358518B2 · kind B2 · utility

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2References

24Claims

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Assignee

SUMITOMO BAKELITE EUROPE N. V. · BE

Inventors

WOUTER VANORMELINGEN · Genk, BE
Bart Schoofs · Genk, BE
Tom De Smedt · Genk, BE

Key dates

Filing date	Mar 9, 2017
Grant date	Jul 23, 2019
Priority date	—
Expiry date	Mar 9, 2037

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L2205/03
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Process for the preparation of a novolac alkylphenol resin using a defined mixture of mono- and dialkylphenols, an aldehyde, and an acid catalyst. The mixture of mono- and dialkylphenols comprises 20 to 70 mol % mono-alkylphenols having an alkyl group of 1 to 18 carbon atoms, and 30 to 80 mol % of dialkylphenols having alkyl groups of 1 to 18 carbon atoms. The molar ratio of aldehyde in comparison to the mono- and dialkylphenol mixture is greater than or equal to 1. Novolac alkylphenol resins prepared according to this invention contain, of each individual starting material phenolic monomer component, less than 0.5 mass %, and in the best case, less than 0.1 mass % in comparison to the total obtained alkylphenol resin.

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