Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1971-06-18
1976-02-24
Czaja, Donald E.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
427340, 427385, 156327, 156330, 428419, 20415918, 260 37R, 260 47EC, 260 775CR, 260 795C, 260609B, 260609R, 260830S, C08G 2300
Patent
active
039403742
ABSTRACT:
Polythiols having more than two terminal and/or pendant thiol groups per polymer molecule are formed by the free radical catalyzed addition of a monomer system made up of either hydrogen sulfide or a dithiol alone or in combination with an acetylenic compound to a polyolefin having at least three olefin sites. The polyolefin is preferably a tri-terminal olefin. The polythiol products are liquid, essentially gel-free materials having number average molecular weights varying from 200 to 30000. The polyfunctional prepolymers of the invention can be cured to stable three-dimensional networks with inexpensive bi-functional oxidants such as lead dioxide. Additionally, prepolymer compositions having 3 or more pendant or terminal thiol groups per molecule when combined with polyfunctional organic reagents, such as diepoxides, form stable, high-tenacity adhesive systems.
REFERENCES:
patent: 3310527 (1967-03-01), De Acetis et al.
patent: 3505166 (1970-04-01), Jones et al.
Hall Daniel N.
Mueller Wolfgang H.
Oswald Alexis A.
Baran Robert J.
Czaja Donald E.
Exxon Research and Engineering Company
Pertilla T.
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