UN PROCEDIMIENTO PARA PREPARAR UNA COMPOSICION DE COPOLIMERO DE BLOQUES

• Main Authors: ITO, HISAHARU, MIYACHI, TAKUMI, SAKAGAMI, TOSHINORI, TOYAMA, YASUO
• Format: Patent
• Language: Spanish
• Published: 16.01.1993
• Edition: 5
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; 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

UNA COMPOSICION COPOLIMERICA DE BLOQUE COMPRENDIENDO: - 40 - 85% EN PESO DE UN COPOLIMERO DE BLOQUE A1 - B1 DE UN COMPUESTO VINIL AROMATICO Y UN DIENO CONJUGADO, RESPECTIVAMENTE, A1 SIENDO < 20% EN PESO DE (A1+B1), A1 Y B1 TENIENDO UN PESO MOLECULAR > 12.000 Y > 150.000, RESPECTIVAMENTE Y - 15 - 60% EN PESO DE UN COPOLIMERO DE BLOQUE A2 - B2 - A3 DE UN COMPUESTO VINIL AROMATICO, UN DIENO CONJUGADO Y UN COMPUESTO VINIL AROMATICO, RESPECTIVAMENTE, A2 + A3 SIENDO < 20% EN PESO DE A2 + B2 + A3, A2 Y A3 TENIENDO UN PESO MOLECULAR > 12.000 Y (PESO MOLECULAR DE B2 ) (MENOR O IGUAL) (PESO MOLECULAR DE B1) / 1,5, UN COMPUESTO ADHESIVO COMPRENDIENDO 100 PARTES EN PESO (PBW) DE DICHA COMPOSICION COPOLIMERICA DE BLOQUEO; 20 - 300 PBW DE UNA RESINA Y 0 - 200 PBW DE UN ABLANDADOR Y UN PROCESO PARA LA PREPARACION DE DICHA COMPOSICION ADHESIVA MEZCLANDO LOS COMPONENTES EN CUESTION. A block copolymer composition comprising 40-85% by weight of a block copolymer A1-B1 from an aromatic vinyl compound and a conjugated diene, respectively, A1 being < 20% by weight of (A1+B1), A1 and B1 having a molecular weight > 12,000 and > 150,000, respectively, and 15-60% by weight of a block copolymer A2-B2-A3 from an aromatic vinyl compound, a conjugated diene and aromatic vinyl compound, respectively, A2+A3 being > 20% by weight of A2+B2+A3, A2 and A3 having a molecular weight > 12,000 and (molecular weight of B2) </= (molecular weight of B1)/1.5, an adhesive composition comprising 100 parts by weight (pbw) of said block copolymer composition, 20-300 pbw of a tackifying resin, and 0-200 pbw of a softener, and a process for the preparation of said adhesive composition by mixing the components in question.