Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1994-03-21
1996-11-05
Acquah, Samuel A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528129, 528144, 528151, 528153, 528155, 528165, 525504, 430192, C08G 804
Patent
active
055718868
ABSTRACT:
An essentially aromatic alkali soluble novolak resin comprising the product resulting from the acid condensation of an aromatic aldehyde and a phenol where the resin has a molecular weight in excess of 1500 and a glass transition temperature in excess of 125.degree. C. If desired, the aromatic novolak resin may be blended with a conventional novolak resin to regulate the glass transition temperature of the resin. The aromatic novolak resin and blends formed therefrom are especially suitable as coating resins and are useful for the formation of photoresist coating compositions.
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Hiraoka et al. "Functionally Substituted Novolak Resins: Lithographic Applications, Radiation Chemistry, and Photooxidation," Materials for Microlithography, Am. Chem. Soc., Wash. D.C., 1984, pp. 322-323.
Hiraoka et al., Am Chem Soc., Div Poly. Chem, vol. 25, #1, 1984 pp. 322-323 .
Acquah Samuel A.
Goldberg Robert L.
Shipley Company Inc.
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