Claims
- 1. A compound represented by the following formula: ##STR4## wherein R.sub.1 and R.sub.2 are independently selected from hydrogen, C.sub.1 -C.sub.18 alkyl groups, C.sub.3 -C.sub.18 cycloalkyl groups, C.sub.6 -C.sub.18 aryl groups, C.sub.7 -C.sub.30 aralkyl groups and C.sub.7 -C.sub.30 alkaryl groups, R.sub.3 is hydrogen or R.sub.2 and R.sub.3 may combine to form a ring when R.sub.1 is hydrogen; R.sub.4 is selected from divalent, trivalent or tetravalent linear or branched radical chosen from a C.sub.1 -C.sub.18 alkyl, C.sub.2 -C.sub.18 alkenyl, C.sub.2 -C.sub.18 alkynyl, C.sub.3 -C.sub.18 cycloalkyl, C.sub.3 -C.sub.18 polycycloalkyl, C.sub.6 -C.sub.18 aryl, C.sub.6 -C.sub.30 polyaryl, C.sub.7 -C.sub.30 aralkyl, C.sub.7 -C.sub.30 alkaryl, oligomers of one or more of these radicals, and which radicals may optionally contain one or more of oxygen, nitrogen, silicon, phosphorous, sulfur, sulphone, sulfoxy and boron; B and B.sup.1 are independently selected from the following heteroatoms: oxygen and sulfur, X is a metal selected from Mg, Ti, Zn, Cd, Sr, Ba, Fe, V, Sn, Te, Mo, Mn, Pb and Al, m is an integer from 1-3 and n is an integer of from 2-4.
- 2. A compound as claimed in claim 1 wherein R.sub.1, R.sub.2 and R.sub.3 are hydrogen, and B and B.sup.1 are oxygen.
- 3. A compound as claimed in claim 1 wherein R.sub.4 is selected from methylene, ethylene, pentamethylene, isopropylmethylene and phenylene.
- 4. A compound as claimed in claim 1 wherein n is 2 and X is selected from Zn and Mg.
Priority Claims (1)
Number |
Date |
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92201187 |
Apr 1992 |
EPX |
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Parent Case Info
This is a continuation of application Ser. No. 08/566,329 filed on Dec. 1, 1995, now abandoned, which is a divisional application of U.S. application Ser. No. 08/331,472 filed Oct. 31, 1994, now U.S. Pat. No. 5,508,354, which is a 371 application of PCT/EP93/01069 filed Apr. 28, 1993.
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Divisions (1)
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Number |
Date |
Country |
Parent |
331472 |
Oct 1994 |
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Continuations (1)
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Number |
Date |
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Parent |
566329 |
Dec 1995 |
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