Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...
Patent
1991-08-29
1993-09-21
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Treating polymer containing material or treating a solid...
524 47, 524 49, 524843, 106213, 156328, 523208, 528487, C09J 1104, C09J10302, C09J16102, C08G 228
Patent
active
052470660
ABSTRACT:
A crosslinking additive for imparting water resistance to starch-based alkaline corrugating adhesive compositions is prepared by reacting acetone and formaldehyde under aqueous alkaline conditions at 20.degree.-80.degree. C. in a molar ratio of from 2 to 5 moles of formaldehyde per mole of acetone. The condensate is thereafter treated with from 1.0 to 2.0 moles of hydrogen peroxide per mole of unreacted formaldehyde which oxidizes the residual formaldehyde to formic acid. The treated crosslinking additive will contain less than 0.4% unreacted formaldehyde and may be added directly to a starch-based corrugating adhesive.
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JACS 53 pp. 1973-1980 (1931) H. S. Fry and J. H. Payne, The Action of Hydrogen Peroxide Upon Simple Carbon Compounds.
Foran Michael
Schoenberg Jules E.
Dec Ellen T.
Merriam Andrew E. C.
Michl Paul R.
National Starch and Chemical Investment Holding Corporation
Szala Edwin M.
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