Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1991-06-06
1992-05-26
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525350, 525355, 525374, 525380, C08C 1924, C08C 1920, C08C 1922
Patent
active
051169126
ABSTRACT:
A metal treatment solution comprising an effective amount of a soluble or dispersible compound which is a derivative of a polyphenol. A composition for treatment and after treatment of metal with polyphenol compounds is provided. The present invention includes novel derivatives of polyphenol compounds which are useful in surface treatment solutions or dispersions. A method for using these solutions or dispersions is also provided. The molecular weight of the polyphenols used to form the derivatives of the present invention are in the range of from about 360 to 30,000 or greater. The resulting derivatives of the present invention typically have molecular weight of up to about 2,000,000 with molecular weights within the range of about 700 to about 70,000 being preferred.
REFERENCES:
patent: 4517028 (1985-05-01), Lindert
patent: 4544727 (1985-10-01), Ema et al.
Lindert Andreas
McCormic David R.
Pierce John R.
Zimmermann William D.
Henkel Corporation
Jaeschke Wayne C.
Sarofim N.
Schofer Joseph L.
Szoke Ernest G.
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