Modified colophony rosins, a process for their preparation, their use and paper-sizing agents containing such modified colophony rosins
AssigneeKrems-Chemie Gesellschaft m.b.H.
InventorsHelmut Ronge, Erhard Prantz, Wolfgang Schoerkhuber
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Abstract
The colophony rosins which have been esterified with a tertiary amino alcohol are disclosed. These colophony rosins which are normally also reinforced with formaldehyde and/or an .alpha.,.beta.-unsaturated carbonyl compounds are useful in the form of an aqueous dispersion as a paper sizing agent. Disclosed are processes for the formation of such colophony rosins and paper sizing agents containing the same as well as papers so sized.
Claims23
A colophony rosin reinforced with formaldehyde and/or an .alpha.,.beta.-unsaturated carbonyl compound and additionally esterified with an amino alcohol, wherein the colophony rosin is esterified with 2.5 to 10% by weight with one or more tertiary amino alcohols, based on the starting rosin.
A process for preparing an improved colophony rosin which comprises esterifying a colophony rosin with one or more tertiary amino alcohols in an amount of 2.5 to 10% by weight based upon the weight of the starting rosin and reinforcing the same by contacting said rosin with formaldehyde and/or .alpha.,.beta.-unsaturated carbonyl compound.
Dependencies are inferred from the claim text.