초록 ▼

An adhesive composition effective in bonding low-energy plastic surfaces to each other which provides improved low temperature performance containing the following components: (1) a first ethylene-vinyl ester copolymer haing from about 4 to about 35 weight percent of a vinyl ester; (2) a second ethy

An adhesive composition effective in bonding low-energy plastic surfaces to each other which provides improved low temperature performance containing the following components: (1) a first ethylene-vinyl ester copolymer haing from about 4 to about 35 weight percent of a vinyl ester; (2) a second ethylene-vinyl ester copolymer having an excess of 35 weight percent of a vinyl ester; (3) a tackifier selected from the following group (a) a rosin, (b) a rosin ester, (c) a terpene resin, (d) a terpene-phenolic resin and (e) a rosin-modified phenolic resin; and (4) a polyethylene wax having a molecular weight of about 600 to about 3000 and a process for bonding low-energy plastic surfaces to each other.

대표청구항 ▼

An adhesive composition effective in bonding low-energy plastic surfaces to each other which provides low temperature performance consisting essentially of: (1) a first ethylene-vinyl ester copolymer having from about 4 to 35 weight percent of a vinyl ester; (2) a second ethylene-vinyl ester copolym

An adhesive composition effective in bonding low-energy plastic surfaces to each other which provides low temperature performance consisting essentially of: (1) a first ethylene-vinyl ester copolymer having from about 4 to 35 weight percent of a vinyl ester; (2) a second ethylene-vinyl ester copolymer having about 36 to about 48 weight percent of a vinyl ester; (3) a tackifier selected from the group consisting of (a) a rosin, (b) a rosin ester, (c) a terpene resin, (d) a terpenephenolic resin and (e) a rosin-modified phenolic resin and (4) a polyethylene wax having a molecular weight of about 600 to about 3000, a penetration as measured by ASTM-D 1321 of about 0.25 to about 1.5 at 25°C., and a density at 25°C. of about 0.93 to about 0.97. A process for bonding low-energy plastic surfaces having a critical surface tension of about 24 to about 37 dynes per centimeter to each other which comprises; (A) heating said surfaces that will be bonded to each other to a temperature of at least about 50°C., (B) applying an adhesive composition effective in bonding low-energy plastic surfaces to each other which provides improved low temperature performance, said adhesive composition consisting essentially of: (1) a first ethylene-vinyl ester copolymer having from about 4 to 35 weight percent of a vinyl ester; (2) a second ethylene-vinyl ester copolymer having an excess of 35 weight percent of a vinyl ester; (3) a tackifier selected from the group consisting of (a) a rosin, (b) a rosin ester, (c) a terpene resin, (d) a terpene phenolic-resin and (e) a rosin-modified phenolic resin; and (4) a polyethylene wax having a molecular weight of about 600 to about 3000, a penetration as measured by ASTM-D 1321 of about 0.25 to about 1.5 at 25° C., and a density at 25°C. of about 0.93 to about 0.97, to at least one of said surfaces and wherein said adhesive composition is in a temperature range of about 140 to about 240°C. at the time of application and (C) then bringing said surfaces in contact with each other.