US4731437A
Expired / Lapsed
US
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Process of preparing organoboron nitride polymer
Assignee: Individual
•
Filing: 1985-08-06
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Granted: 1988-03-15
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Expires: 2005-08-06
Abstract
Abstract Organoboron nitride polymers are produced by polymerization of organoboron nitride compounds having a cyclic structure of the formula (XBNR) 3 wherein R represents hydrogen, a saturated or unsaturated alkyl group or an aryl group and X represents a primary, secondary or tertiary amino group or a silylamino group in the presence of at least one of amine compounds of the formula R 1 NH 2 and amine compounds of the formula R 1 NHR 2 wherein R 1 and R 2 which may be the same or different individually represent an alkyl, aryl or silyl group. The organoboron nitride polymers are suitable as a raw material for the production of boron nitride and as a binder for boron nitride powders.
Inventors
- 👤 Isoji Taniguchi
- 👤 Yoshiharu Kimura
- 👤 Kenji Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:35
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/08; C01; C01B; C01B21/00; C01B21/06; C01B21/064; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/583; C04B35/622; C04B35/62227; C08K; C08K3/00; C08K3/38; C01P; C01P2002/00; C01P2002/80; C01P2002/82
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
179 words
A process of producing an organoboron nitride polymer which comprises polymerizing an organoboron nitride compound having a cyclic structure of the formula (XBNR) 3 wherein R represents hydrogen, a saturated or unsaturated alkyl group, or an aryl group and X represents NH 2 , NHR 3 or NR 3 R 4 wherein R 3 and R 4 may be the same or different and each represents and alkyl group, an aryl group or a silyl group of -SiR 5 R 6 R 7 where R 5 , and R 6 and R 7 may be the same or different and each represents an alkyl group or an aryl group, in the presence of at least one of an amine compound of the formula R 1 NH 2 and an amine compound of the formula R 1 NHR 2 in the range of from 0.003 to 0.3 mol of the organoboron nitride compound wherein R 1 and R 2 which may be the same or different individually represent a C 12 alkyl, a C 18 alkyl or an aryl group.
Claim 2
Dependent Claim
179 words
A process of producing an organoboron nitride polymer which comprises polymerizing an organoboron nitride compound having a cyclic structure of the formula (XBNR) 3 wherein R represents hydrogen, a saturated or unsaturated alkyl group, or an aryl group and X represents NH 2 , NHR 3 or NR 3 R 4 wherein R 3 and R 4 may be the same or different and each represents and alkyl group, an aryl group or a silyl group of -SiR 5 R 6 R 7 where R 5 , and R 6 and R 7 may be the same or different and each represents an alkyl group or an aryl group, in the presence of at least one of an amine compound of the formula R 1 NH 2 and an amine compound of the formula R 1 NHR 2 in the range of from 0.003 to 0.3 mol of the organoboron nitride compound wherein R 1 and R 2 which may be the same or different individually represent a C 12 alkyl, a C 18 alkyl or an aryl group.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein R 1 or R 2 represents a lauryl or stearyl group.
Claim 4
Dependent Claim
28 words
The process of claim 1 wherein the polymerization is carried out in a solvent selected from the group consisting of aromatic hydrocarbons, ethers, tertiary amines and polar solvents.
Claim 5
Dependent Claim
20 words
The process of claim 1 wherein the polymerization is carried out at a temperature of 80° C. to 500° C.
Claim 6
Dependent Claim
28 words
The process of claim 2 wherein the polymerization is carried out in a solvent selected from the group consisting of aromatic hydrocarbons, ethers, tertiary amines and polar solvents.
Claim 7
Dependent Claim
20 words
The process of claim 2 wherein the polymerization is carried out at the temperature of 80° C. to 500° C.
Claim 8
Dependent Claim
20 words
The process of claim 3 wherein the polymerization is carried out at a temperature of 80° C. to 500° C.
Claim 9
Dependent Claim
20 words
The process of claim 5 wherein the polymerization is carried out at a temperature of 80° C. to 500° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-03-15 | 1991-09-14 | 1992-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-15 | 1995-09-14 | 1996-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-15 | 1999-09-14 | 2000-03-15 | $7700.00 | Window Closed / Lapsed |