Aqueous emulsion coating for individual fibers of a cellulosic sheet providing improved wet strength
AssigneeH. B. Fuller Company
InventorRobert M. Hume, III
Life of this patent
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Abstract
A basic aqueous emulsion composition that can be used as a treatment for cellulosic sheets or articles made of cellulosic fibers to provide improved water resistance by forming a discrete coating on the individual fibers that make up the sheet while not substantially limiting the compatibility of the treated sheet with aqueous glues, dyes or inks comprising a major proportion of water, a mixture of wax and rosin, an emulsion stabilizer and a chelating agent.
Claims15
A basic emulsion composition, that can provide water resistance to a cellulosic sheet while preserving its affinity with aqueous compositions, which comprises in an emulsion:
- (a) a major proportion of water;
- (b) an effective water resistance providing amount comprising about 0.02 to 15 wt-% based upon the total emulsion composition of a mixture of a wax compound and a rosin compound;
- (c) an effective amount comprising about 0.01 to 5 wt-% based upon the total emulsion composition of an emulsion stabilizer comprising the reaction product of a relatively strong basic component and a relatively weak acidic component;
- and
- (d) an effective amount comprising about 0.01 to 10 wt-% of the total emulsion composition of a chelating agent resulting in the chelation of ionic species in the water and in the cellulosic sheet.
Dependencies are inferred from the claim text.