Compositions: coating or plastic – Coating or plastic compositions – Heavy metal compound containing
Patent
1999-03-30
2000-05-30
Brunsman, David
Compositions: coating or plastic
Coating or plastic compositions
Heavy metal compound containing
501136, C04B 35491, C07F 724, C07F 728, C09K 300
Patent
active
060686901
ABSTRACT:
To form a thin film of ferroelectric substance by sol-gel method, there is provided a process for obtaining a precursor solution from which a coating solution enabling to form a thin film having a film thickness enough to exhibit its property can be obtained just by one coating operation without any multi-coating. After composing a Ti alkoxide oligomer having a cyclic structure or a ladder structure by hydrolysis and poly-condensation of a Ti alkoxide and composing a Zr alkoxide oligomer by hydrolysis and polycondensation of a Zr alkoxide, the Ti alkoxide oligomer is preliminarily hydrolyzed and reacted with the Zr alkoxide oligomer, whereby a Ti--O--Zr precursor is obtained, and a Pb(Ti--O--Zr) is obtained by reacting the Ti--O--Zr precursor with the Pb alkoxide.
REFERENCES:
patent: 4746366 (1988-05-01), Philipp et al.
patent: 4816072 (1989-03-01), Harley et al.
patent: 5032559 (1991-07-01), McSeeeny et al.
patent: 5656073 (1997-08-01), Glaubitt et al.
Brunsman David
KRI International, Inc.
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