MOLTEN ADHESIVE Russian patent published in 1997 - IPC

FIELD: organic chemistry; production of molten adhesives for use in applying adhesive coatings. SUBSTANCE: proposed molten adhesive comprises film forming agent constituted by mixture of diene-styrene block-copolymers, and antioxidant. Inventive novelty of proposed adhesive resides in fact that it employs, as mixture of block-copolymers, mixture of linear styrene and isoprene (butadiene) block-copolymers having two-, three-, four-, five-, six- and seven-block structure. Molecular weight of isoprene (butadiene)-and-styrene blocks is equal to 2000-15000, block-copolymers present in mixture in following weight ratio, parts by weight: two-block isoprene (butadiene)-and-styrene A-B block-copolymer, 2-20; three-block isoprene (butadiene)-and-styrene A-B-A block-copolymer, 2-10; four-block isoprene (butadiene)-and-styrene A-B-A-B block-copolymer, 2-10; five-block isoprene (butadiene)-and-styrene A-B-A-B-A block-copolymer, 2-10; six-block isoprene (butadiene)-and-styrene A-B-A-B-A-B block-copolymer, 2-10; seven-block isoprene (butadiene)-and-styrene A-B-A-B-A-B-A block-copolymer, 40-90. Components are taken in following weight ratio, parts by weight: film forming agent, 100; antioxidant, 1.0-1.5. EFFECT: enhanced adhesion strength; lower energy consumption. 2 tbl