Melt adhesive contg. block co-polymer - of vinyl:aromatic monomer and butadiene!- isoprene copolymer block, giving heat resistant bond

• Main Authors: DRUSCHKE,.DR.,WOLFGANG, FAHRBACH,.DR.,GERHARD, GROH,.DR.,WOLFGANG
• Format: Patent
• Language: English; German
• Published: 30.04.1981
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS AS ADHESIVES

Melt adhesive is a mixt. of (a) 100 pts. wt. of a non- hydrogenated, linear block copolymer with mol.wt. 30,000-300,000 of formula A-B-A, in which the terminal A blocks form 10-50 wt.% of the block copolymer, each have mol.wt. 5,000-50,000 and are non-elastomeric blocks of a monovinyl-aromatic monomer, and the block B is an elastomeric (co)polymer of butadiene and/or isoprene in ratio by wt. of 70:30-5:95; (b) 25-300 pts. wt. of a tackifying resin; (c) 5-200 pts.wt. of a rubber extending oil; and opt. (d) the usual additives. Compsn. is esp. used as a pressure-sensitive adhesive for self-bonding materials, e.g. films, labels, floor or wall coverings, and medicinal plasters.