Novel initiators for cationic polymerization
AssigneeMinnesota Mining and Manufacturing Company
InventorOmar Farooq
Life of this patent
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Abstract
Disclosed are novel compounds which are useful as initiators for cationically polymerizable monomers. The novel compounds comprise a carbon containing cation (e.g., trimethyloxonium) which is capable of initiating cationic polymerization and a non-nucleophilic counterion which is an at least partially fluorinated hydrocarbylsulfonato metallate (e.g. perfluoroethylsulfonato-aluminate). The disclosed initiators are capable of initiating the cationic polymerization of a wide variety of monomers such as epoxides, tetrahydrofuans, oxazolines, vinyls, lactones, and the like.
Claims7
An initiator for cationic polymerization comprising a compound of the formula:
- Y.sub.a.sup.b+ [(RSO.sub.3).sub.n M].sup.z-
- wherein:
- Y is a cation selected from the group consisting of oxonium, sulfonium, sulfoxonium, selenonium, iodonium, diazonium, pyrylium, carbenium, and acylium cations;
- R is independently selected from the group consisting of:
- ##STR3## R.sub.1 is hydrogen, halogen, an alkyl group or an aryl group;
- F is fluorine;
- M is an element chosen from the group of elements consisting of:
- Sc, Y, La, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Re, Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, Hg, B, Al, Ga, In, Tl, Ge, Sn, Pb, P, As, Sb, Bi, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu.
- z is 1, 2, 3, or 4;
- and
- a, b, and n are integers such that z is less than or equal to n and the product of integer a multiplied by integer b equals z.
Dependencies are inferred from the claim text.