MULTILAYER ADHESIVE MATERIAL Russian patent published in 2014 - IPC C09J7/02 B32B27/00 B32B27/28 

FIELD: chemistry.

SUBSTANCE: invention relates to adhesive materials and can be used in light industry, including sewing, and for making special-purpose and medical articles. The multilayer adhesive material is obtained in form of a film which is smooth on one side and sticky on the other side. The layers are formed successively from compositions with the same chemical make-up which are an aqueous dispersion of a copolymer of butyl acrylate, methacrylic acid and acrylonitrile. Components of the composition of the adhesive layer are in ratio of (92:5:3)-(97:2:1). Components of the reinforcing layer are in ratio of (70:20:10)-(77:17:6). If there is need for one or more intermediate layers, the components are in ratio of (80:15:5)-(85:13:7). Depending on the purpose of the article, the reinforcing layer can be an intermediate layer. Sections of the sides of the material have a shaped configuration. One or more layers can contain chemical additives, such as a dye, an adhesive property enhancer in form of aqueous solutions or powder.

EFFECT: invention broadens technical capabilities of the multilayer adhesive material, improves the quality of the article, reduces the rigidity of joints, lowers energy, material and labour costs and also increases the reliability of articles in accordance with properties of the material and conditions of use.

2 cl, 5 dwg, 2 tbl