C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 8/10 (2006.01)
Patent
CA 2107345
2107345 9217528 PCTABS00016 A process for forming a phenol formaldehyde resin including the steps of: (i) forming a first additive including a glycol and an aromatic dicaborxylic acid; (ii) adding said first additive as well as an alpha hydroxy acid to a first resin component comprising resin precursors including phenol, formaldehyde, an acid catalyst or a base catalyst after said precursors have reacted for 40-55 minutes and/or when water has separated from said precursors; (iii) isolating or storing said first resin component which is maintained in a non cured state by the addition of said first additive; (iv) forming a second additive including zinc chloride, an alpha hydroxy acid, para toluene sulphonic acid, sulphuric or hydrochloric acid and a non aqueous solvent; (v) adding said second additive to a second resin component which includes resin precursors phenol, formaldehyde, methanol and an aliphatic dicarboxylic acid after said precursors have reacted for 20-30 minutes; (vi) combining said first resin component and said second resin component and subsequently allowing a mixture formed thereby to cure. There is also included both the first resin component and the second resin component whereby in each component the mole ratio between formaldehyde and phenol is greater than unity.
Ridout & Maybee Llp
Ryan Barry William
LandOfFree
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