Claims
- 1. An adhesive composition comprising:
- 35-65 parts halogenated butyl rubber having a bromine content of 2.0-2.5% or a chlorine content of 1.1-1.3%; 35-65 parts pre-crosslinked butyl rubber having a weight percent of solubility in cyclohexane of 15-50%;
- - 20parts ethylene-propylene-non-conjugated diene terpolymer; 80-120 parts thermoplastic, aliphatic monomer derived hydrocarbon resin derived from C.sub.5 -C.sub.9 streams polymerized to certain molecular weights to give a softening range of 162.degree.-181.degree. C., an acid number of less than 1 and a bromine number of 16.0-20.0; and
- 10-40 parts aliphatic polyisocyanate wherein said polyisocyanate is based on 1,6 hexamethylene diisocyanate adduct with an NCO content of 15.0-17.0% concentration;
- all in parts per 100 parts by weight of rubbery components.
- 2. The adhesive composition of claim 1 wherein the said halogenated butyl rubber is 40-60 parts, said pre-crosslinked butyl rubber is 35-50 parts, ethylenepropylene-non-conjugated diene terpolymer is 5-15 parts, the thermoplastic hydrocarbon resin is 90-110 parts, and the aliphatic polyisocyanate is 10-30 parts per 100 parts of rubbery polymers.
- 3. An adhesive composition of claim 1, further comprising an adsorbent of the alkali-metal aluminosilica zeolite family of compounds at a concentration of 5.0-15.0 PPHR; zinc oxide at a concentration of 0.5-2.0 PPHR; an organic liquid having a solubility parameter of 8.5-8.9 and a hydrogen bonding index of 3.0-3.5 at a total concentration of 500.0-640.0 PPHR resulting in a total solid level of 31.0-37.0% and carbon black concentration of 2.0-20.0 PPHR.
Parent Case Info
This is a continuation-in-part of application Ser. No. 565,266 filed Dec. 27, 1983, now U.S. Pat. No. 4,501,842.
US Referenced Citations (5)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1272763 |
May 1972 |
GBX |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
565266 |
Dec 1983 |
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