초록 ▼

Flat rubber sheets are joined together at their primed surfaces utilizing an adhesive tape composition which features at least one EPDM rubber and will provide a long-term, water-tight barrier. The adhesive tape composition is a solventless, preformed, tacky composition comprising a) at least one cr

Flat rubber sheets are joined together at their primed surfaces utilizing an adhesive tape composition which features at least one EPDM rubber and will provide a long-term, water-tight barrier. The adhesive tape composition is a solventless, preformed, tacky composition comprising a) at least one crosslinkable EPDM rubber, b) a filler, either of the reinforcing or semi-reinforcing variety, c) one or more compatible tackifiers, d) a softener, and lastly, e) a cure system for the rubbery polymer. The tape composition itself has excellent ozone, moisture, weathering and heat aging resistance as well as superior low temperature properties.

대표청구항 ▼

An adhesive tape composition, comprising: a first EPDM rubber having an ethylene content of from about 45 to about 58 percent by weight, a diene content of from about 2 to about 12 percent by weight, and a weight average molecular weight of from about 50,000 to about 250,000; a second EPDM rubber h

An adhesive tape composition, comprising: a first EPDM rubber having an ethylene content of from about 45 to about 58 percent by weight, a diene content of from about 2 to about 12 percent by weight, and a weight average molecular weight of from about 50,000 to about 250,000; a second EPDM rubber having an ethylene content of from about 45 to about 58 percent by weight, a diene content of from about 2 to about 10 percent by weight, and a weight average molecular weight of from about 10,000 to about 30,000, said percentages by weight being based on the total weight of the first EPDM rubber and the second EPDM rubber, respectively; from about 10 parts by weight to about 125 parts by weight of a liquid tackifying polybutene polymer or at least one plasticizing agent, or both, per 100 parts by weight of said EPDM rubbers; and a curing agent which is either a nitroso compound or an oxidizing agent of from about 0.1 to about 2.0 parts by weight with a co-curing agent of from about 0.3 to about 1.5 parts by weight of p-quinone dioxime, said weight being based on 100 parts by weight of said EPDM rubbers.