Diethylzinc composition, method for heat stabilization, and compound for heat stabilization
AssigneeTosoh Finechem Corporation
InventorsKenichi HAGA, Shizuo TOMIYASU, Kohichi TOKUDOME
Life of this patent
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Abstract
[Object] To improve heat stability of diethylzinc which is used for a catalyst of polymerizing, an organic synthetic reaction reagent and a raw materials for providing a zinc film by MOCVD. And to offer the diethylzinc composition being superior in heat stability, even if it handles for a long term a metal zinc particle does not precipitate. [Solving Means] Use a diethylzinc composition added a compound which is added an aromatic compound as an additive which has isopropenyl group bonded as a side chain.
Claims16
1-4. (canceled)
A heat stabilization method, comprising
- selecting a an aromatic compound having an isopropenyl group as a side chain as an additive in a diethylzinc composition,
- wherein the additive is selected from the group consisting of formula (1), (2) and (3):
- wherein in formula (1), (2) and (3), R represents respectively, hydrogen, a straight chain or branched alkyl group which has 1-8 carbon atoms, a straight chain or branched alkenyl group , including an isopropenyl group, which has 1-8 carbon atoms, an allyl group which has 6-14 carbon atoms, and
- wherein in formula (1), less than all R groups are hydrogen;
- and
- adding the compound at a ratio of addition to diethylzinc of 100 ppm to 20 wt %.
6-7. (canceled)
9-13. (canceled)
A heat stabilization method, comprising:
- selecting a compound as an additive in a diethylzinc composition, and
- adding the compound at a ratio of addition to diethylzinc of 100 ppm-20 wt %,
- wherein the selected compound is at least one of following (1)˜(4):
- (1) particular aromatic compounds having isopropyl group bonded as a side chain;
- (2) particular compound having fulvene structure;
- (3) squalene;
- and
- (4) 2,4-diphenyl-4 -methyl-l-pentene, and
- wherein the selected compound has a melting point or a freezing point of 25 degrees Celsius or less.
15-16. (canceled)
18-23. (canceled)
A heat stabilization method, comprising
- selecting a compound as an additive in a diethylzinc composition, and
- adding the compound at a rate of addition to diethylzinc of 100 ppm to 20 wt %,
- wherein the compound is a naphthalene compound having a melting point or freezing point of 85 degrees Celsius or less.
26-31. (canceled)
A heat stabilization method, comprising
- selecting a compound in as an additive in a diethylzinc composition, and
- adding the compound at a rate of addition to diethylzinc of 100 ppm to 20 wt %,
- wherein the compound has azulene structure represented by the following formula (13).
33-34. (canceled)
36-41. (canceled)
Dependencies are inferred from the claim text.