Patent ID: 11926770
Assignee: ROHM AND HAAS COMPANY
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 2:
3. A method for preparing a water-based adhesive composition, comprising:
dispersing at least one unsaturated monomer consisting of (i) at least one acrylate selected from the group consisting of butyl acrylate, ethylhexyl acrylate, ethyl acrylate, methyl acrylate, octyl acrylate, isooctyl acrylate, decyl acrylate, isodecyl acrylate, lauryl acrylate and cyclohexyl acrylate methacrylates such as methyl methacrylate, isobutyl methacrylate, octyl methacrylate, isooctyl methacrylate, decyl methacrylate, isodecyl methacrylate, lauryl methacrylate, pentadecyl methacrylate, stearyl methacrylate, C12 to C18 alkyl methacrylates and cyclohexyl methacrylate, and (ii) optionally acrylic acid, and at least one surfactant in an aqueous medium to form an emulsified mixture;
introducing at least one initiator to the emulsified mixture, thereby polymerizing the at least one unsaturated monomer; and
introducing at least one compound selected from the group consisting of at least one conjugated acid, at least one mono-ester of a conjugated acid, and mixtures thereof to the emulsified mixture during polymerization of the at least one unsaturated monomer, thereby forming an interpolymer comprising the at least one unsaturated monomer and the at least one ester;
wherein the at least one conjugated acid comprises an unsaturated fatty acid having at least three conjugated double bonds,
wherein the unsaturated fatty acid is an unsaturated fatty acid derivable from tung oil, wherein the at least one conjugated acid is present in the emulsified mixture from 0.01 to 2 weight percent, wherein the at least one conjugated acid is introduced to the emulsified mixture after at least 90% of the at least one unsaturated monomer is introduced to the aqueous medium; and
wherein the tung oil comprises a fatty acid including α-eleostearic acid.