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US 5,055,506 AGranted
Polymer systems and methods for their production
AssigneeUnion Oil Company of California
InventorGaylen M. Knutson
Life of this patent
Estimating the term…
Abstract
Polyamines having at least two amine groups are incorporated into a polymer system comprising an anionic surfactant and a polymer having at least one anionic pendant group. The resulting polymer system typically exhibits at least one improved physical property.
Claims76
An emulsion comprising:
- (a) an alkenyl aromatic/alkadiene copolymer having at least one anionic pendant group;
- (b) a tackifier resin;
- (c) an anionic surfactant capable of emulsifying the alkenyl aromatic/alkadiene or the tackifier or both;
- and
- (d) a polyamine having at least two amine groups,
- whereupon driving, the emulsion yields a pressure-sensitive adhesive.
3 more elements
An emulsion comprising:
- (a) about 40 to about 85 weight percent on a dry basis of a carboxylated sytrene/butadiene copolymer;
- (b) about 15 to about 60 weight percent on a dry basis of a tackifying resin;
- (c) a sufficient amount of an anionic surfactant to emulsify the copolymer and the tackifying resin;
- and
- (d) a sufficient amount of a polyamine for the emulsion to comprise at least about 1.5 equivalents of amine per equivalent of anionic pendant group on the copolymer,
- whereupon drying, the emulsion yields a pressure-sensitive adhesive.
3 more elements
An emulsion comprising:
- (a) about 40 to about 85 weight percent on a dry basis of a carboxylated styrene/butadiene copolymer;
- (b) about 15 to about 60 weight percent on a dry basis of a tackifying resin;
- (c) a sufficient amount of an anionic surfactant to emulsify the copolymer and the tackifying resin;
- and
- (d) a sufficient amount of a polyamine for the amine to anionic pendant group equivalents on both the copolymer and the anionic surfactant to be at least about 0.5 to 1,
- whereupon drying, the emulsion yields a pressure-sensitive adhesive.
3 more elements
Dependencies are inferred from the claim text.