University of Ottawa

Marc Arnold Dube

Lili Qie

Somaieh Salehpour

Methods of preparing latex-based adhesives are provided. Such methods include aging and heating of latex-films to improve performance properties with respect to tack, peel strength, and sheer strength. The latex adhesives may be used as pressure sensitive adhesives.

Methods for making adhesives

Methods are provided for making polyglycerol. The methods include heating glycerol at reduced pressure in the absence of a glyceride and in the presence of a catalytic amount of an acid selected from the group consisting of sulfuric acid, triflic acid, hydrochloric acid, hexafluorophosphoric acid, tetrafluoroboric acid and mixtures thereof.

Methods for making polyglycerol

The present technology provides a latex comprising: a mixture of microgels and sol polymers of an acrylic copolymer, wherein the Mof the acrylic copolymer is greater than or equal to the Mthereof; the Mof the sol polymers is greater than or equal to twice the Mof the acrylic copolymer; the amount of sol polymer having a Mless than twice the Mof the acrylic copolymer is about 20 wt % or less than 20 wt %. Such lattices may be used to form films for use as adhesives such as pressure sensitive adhesives. Also provided are methods for manufacturing the films and adhesives.

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Ottawa, Canada

Marc Arnold Dube