DIRECTLY FASTENING, HALOGEN-FREE, QUICK-DRYING, THERMO-BONDING BINDER FOR GLUING FILMS BASED ON POLYESTER WITH POLYSTYRENE, POLYESTER OR PVC Russian patent published in 2019 - IPC C09D133/08 C09D133/10 C09D167/06 C09J133/08 C09J133/10 C09J167/06 

FIELD: chemistry.

SUBSTANCE: invention relates to a heat-sealable system for applying a coating suitable for gluing different types of bases, as well as to a method for gluing films based on polyester or a film coated with polyethylene terephthalate (PET), with polystyrene, polyester and polyvinyl chloride (PVC) using said system. System contains a film-forming dispersion which contains from 10 to 60 % by weight of polyester or mixture of polyesters as polymer of type A, from 10 to 60 % by weight of poly(meth)acrylate as polymer of type B, from 1 to 20 % by weight of graft copolymer consisting of polymer type A and polymer type B, as polymer type AB, from 1 to 30 % by weight of polyolefin as type C polymer and from 1 to 35 % by weight of graft copolymer in quality of a CD type polymer consisting of a polymer of type C and poly(meth)acrylate as a polymer of type D. In each case in terms of total weight of polymers of type A, B, C, AB and CD, and fraction of polymer of type C, including its portion in the CD type polymer is from 5 to 40 wt. % in terms of said total weight, wherein from 10 to 40 % of carbon atoms in the main chain of type C polymer are tertiary carbon atoms. Component C contains repeating ethylene units in ratio of 20 to 70 wt. %, and its weight-average molecular weight M_w ranges from 10,000 to 250,000, and content of solid substances in the dispersion ranges from 25 to 70 % by weight.

EFFECT: technical result consists in producing heat-sealable coatings with better transparency and high strength of the glued line and properties, causing uniform peeling, which are suitable for bonding PET-films and films coated with PET, with different materials.

10 cl, 7 tbl, 5 ex