Use of stannylenes and germylenes as polymerization...

Details Use of stannylenes and germylenes as polymerization... Use of stannylenes and germylenes as polymerization...

2006-08-01

2006-08-01

Berman, Susan (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From heterocyclic reactant containing as ring atoms oxygen,...

C528S403000, C528S421000, C528S018000, C528S040000, C528S377000, C528S378000, C528S380000, C528S402000

Reexamination Certificate

active

07084237

ABSTRACT:
The use of stannylenes and germylenes of general formula (I) wherein: M represents a tin or geranium atom; L1and L2independently represent a group of formula: -E14(R14) (R′14) (R″14), -E15(R15) (R′15) or -E16(R16)) or together form a chain of formula -L′1-A- L′2; A represents a saturated or unsaturated chain comprising one, two or three elements of group 14; L′1and L′2, represent, independently, a group of formula: -E14(R14) (R′14)-, E15(R15)- or -E16-; E14is an element of group 14; E15is an element of group 15; E16is an element of group 16; R14, R′14, R″14, R15, R′15and R16represent variable groups as polymerization catalysts of heterocycles.

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