ADHESIVE COMPOSITIONS WITH MULTIPLE TACKIFIERS

• Main Authors: JOSEPH EUGENE G, BHARTI VIVEK, TUMEY MICHAEL L, MA JINGJING
• Format: Patent
• Language: English; Korean
• Published: 07.02.2011
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; DYES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; PAINTS; POLISHES; USE OF MATERIALS AS ADHESIVES

The present invention relates to an adhesive composition comprising: a) a block copolymer comprising at least two A endblock polymeric units that are each derived from a first monoethylenically unsaturated monomer comprising a (meth)acrylate, styrene, or combination thereof, wherein each A endblock has a glass transition temperature of at least 50 °C; and at least one B midblock polymeric unit that is derived from a second monoethylenically unsaturated monomer comprising a (meth)acrylate, vinyl ester, or combination thereof, wherein each B midblock has a glass transition temperature no greater than 20 °C; and b) a tackifier mixture comprising 1) 30 to 70 weight percent weight percent of a first rosin acid, first rosin ester, or mixture thereof having zero or one carbon-carbon bond; 2) 10 to 40 weight percent of a second rosin acid, second rosin ester, or mixture thereof having two carbon-carbon double bonds; and 3) 10 to 50 weight percent of a third rosin acid, third rosin ester, or mixture thereof having three carbon-carbon double bonds.