Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1996-07-17
1998-04-14
Truong, Duc
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528154, 528243, 528493, 528495, 528501, 528502, 528503, 524354, 524594, C08G 804, C08G 1402
Patent
active
057392552
ABSTRACT:
This invention relates to benzylic ether phenolic resole resins prepared in a sealed reaction vessel. The benzylic ether phenolic resole resins are prepared by heating phenol and an aldehyde in a sealed reaction vessel in the presence of a divalent metal catalyst without removing water generated by the reaction until an appropriate endpoint for the resin is reached. The benzylic ether phenolic resole resins produced by the process are preferably free or essentially free of unreacted formaldehyde and can be used in the resin component of phenolic-urethane foundry binders to make foundry cores and/or molds by the cold-box and no-bake processes. The cores and/or molds are used for making metal castings.
REFERENCES:
patent: Re34228 (1993-04-01), Armbruster et al.
patent: 1653302 (1927-12-01), Matheson
patent: 3429848 (1969-02-01), Robins
patent: 3485797 (1969-12-01), Robins
patent: 3676392 (1972-07-01), Robins
patent: 3687896 (1972-08-01), Vargiu et al.
patent: 4116916 (1978-09-01), Holik
patent: 4157324 (1979-06-01), Culbertson
patent: 4317896 (1982-03-01), Holik
patent: 4546124 (1985-10-01), Laitar et al.
patent: 5043365 (1991-08-01), Gardziella et al.
patent: 5380800 (1995-01-01), Bender et al.
Article "Phenolic resole resins Chemistry, Applications and Performance" A. Knop and L. A. Pilato, Springer-Verlag, 1985, pp. 93-95.
Huttenes-Albertus--Innovation and Partnership Foundry Trade Journal, 167(3487), pp. 736-737, Dec. 10/24, 1993.
Dando Thomas Edward
Dunnavant William Rexford
Fechter Robert Bernard
Langer Heimo Josef
Ashland Inc.
Hedden David L.
Truong Duc
LandOfFree
Benzylic ether phenolic resole resins does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Benzylic ether phenolic resole resins, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Benzylic ether phenolic resole resins will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-635721