PRESSURE SENSITIVE WATER-BASED ADHESIVES AND METHODS FOR PRODUCTION THEREOF Russian patent published in 2020 - IPC C09J133/00 

FIELD: chemistry.

SUBSTANCE: disclosed are pressure sensitive water-based adhesives containing (a) an acrylic emulsion characterized by glass transition temperature of 20 °C or less, (b) optionally, a dispersant or a silane-containing compound, and (c) an emulsion of anethylene or propylene copolymer. In certain embodiments of invention (a) is from 75 to 99 wt. % compositions, (b) ranges from 0.1 to 5 wt. % compositions, if present in the composition, and (c) ranges from 0.1 to 25 wt. % compositions, each of which is calculated from a dry residue of the compositions. Also disclosed are methods of producing pressure sensitive water-based adhesive compositions which include emulsion polymerisation of at least one unsaturated monomer, to form emulsion polymer, characterized by glass transition temperature of −10 °C or less, and mixing the emulsion polymer together with a dispersant or a silane-containing compound and an emulsion of an ethylene or propylene copolymer. Also disclosed are pressure sensitive water-based adhesives and pressure-sensitive adhesive films.

EFFECT: disclosed group of inventions enables to obtain adhesive compositions with improved cohesion/adhesion properties.

10 cl, 6 tbl