POLYPROPYLENE-BASED ADHESIVE COMPOSITION

• Main Authors: KARJALA TERESA P, ANSEMS PATRICIA, RICKEY CYNTHIA L, TAHA ANGELA N, DIEHL CHARLES F, YALVAC SELIM, KARANDE SEEMA V
• Format: Patent
• Language: English
• Published: 07.03.2013
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; 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

PROBLEM TO BE SOLVED: To provide a hot-melt adhesive that includes a low softening temperature, hardness, elasticity, low migration and blooming, and resistance to discoloration.SOLUTION: The hot-melt adhesive comprises a copolymer of propylene and at least one comonomer selected from the group consisting of ethylene and Cα-olefins, the copolymer having (i) units derived from propylene of greater than about 50 mole percent, (ii) a Brookfield viscosity at 190°C from about 50 to about 100,000 cP, (iii) an MWD from about 1.5 to about 15, and (iv) containing less than about 50 ppm residual catalyst metal.