Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...
Patent
1990-06-19
1994-06-21
Shaver, Paul F.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From silicon reactant having at least one...
528 19, 528 31, 528 32, 528 33, 528 34, 528 38, 528 39, 556412, 264239, 264280, C08G 7704, C08G 7760, C08G 7762, C07F 708
Patent
active
053229134
ABSTRACT:
Silazanes and related compounds are prepared by (a) providing a precursor containing at least one Si--N bond, cleaving an Si--N bond in the precursor in the presence of hydrogen or a hydrogen donor, and reacting the cleavage product with a second cleavage product or with a compound containing an Si--H bond, an N--H bond, or both, to produce an initial silazane product having at least one newly formed Si--N bond or (b) providing one or more reactants which contain an Si--H bond and an N--H bond, and causing reaction to occur between the two bonds in the presence of a transition metal catalyst to form an initial silazane product having newly formed Si--N bonds. Further products may result from additional reaction of either type. Novel compounds, including siloxazanes and high molecular weight polysilazanes, are provided. The compounds may be pyrolyzed to yield ceramic materials such as silicon nitride, silicon carbide and silicon oxynitride. In a preferred embodiment, substantially pure silicon nitride and articles prepared therefrom are provided. Fibers, coatings, binders, and the like may be prepared from the novel materials.
REFERENCES:
patent: Re31727 (1984-06-01), Eckberg
patent: 2564674 (1951-08-01), Cheronis
patent: 2579416 (1951-12-01), Cheronis
patent: 2579417 (1951-12-01), Cheronis
patent: 2579418 (1951-12-01), Cheronis
patent: 2968530 (1961-01-01), Forgeng et al.
patent: 3007886 (1967-11-01), Parker
patent: 3140288 (1964-07-01), Peake
patent: 3193399 (1965-07-01), Washburn
patent: 3356513 (1967-12-01), Washburn
patent: 3393218 (1968-07-01), Van Wazer et al.
patent: 3518289 (1970-06-01), Pearce et al.
patent: 3530092 (1970-09-01), Borchert
patent: 3853567 (1974-12-01), Verbeek
patent: 3892583 (1975-07-01), Winter et al.
patent: 4097294 (1978-06-01), Rice et al.
patent: 4115427 (1978-09-01), Kotzsch et al.
patent: 4177230 (1979-12-01), Mazdiyasni
patent: 4200666 (1980-04-01), Reinberg
patent: 4255549 (1981-03-01), Christophliemk et al.
patent: 4292422 (1981-09-01), Homan et al.
patent: 4293676 (1981-10-01), Homan et al.
patent: 4312970 (1982-01-01), Gaul, Jr.
patent: 4340619 (1982-07-01), Gaul, Jr.
patent: 4395460 (1983-07-01), Gaul
patent: 4397828 (1983-08-01), Seyferth et al.
patent: 4404153 (1983-09-01), Gaul, Jr.
patent: 4471132 (1984-09-01), Hallgren
patent: 4482669 (1984-11-01), Seyferth et al.
patent: 4482689 (1984-11-01), Haluska
patent: 4535007 (1985-08-01), Cannady
patent: 4540803 (1985-09-01), Cannady
patent: 4543344 (1985-09-01), Cannady
patent: 4594330 (1986-06-01), Suzuki et al.
patent: 4595775 (1986-06-01), Arkles
patent: 4612383 (1986-09-01), Laine et al.
patent: 4656300 (1987-04-01), Lebrun et al.
patent: 4666872 (1987-06-01), Baney et al.
patent: 4668642 (1987-05-01), Bajalski
patent: 4675424 (1987-06-01), King, III et al.
patent: 4689382 (1987-08-01), Lebrun et al.
Blum et al., "A New Catalytic Method for Producing Preceramic Polysilazanes", Materials Research Society Symposium Proceedings, 73:389 (Apr. 1986).
Blum and Laine, Organometallics, 5:2081 (1986).
Brosset and Idrestedt, Nature, No. 4925:1211 (1964).
Coblenz et al., "Formation of Ceramic Composites and Coatings Utilizing Polymer Pyrolysis", in Emergent Process Methods for High Technology Ceramics, ed. Davis et al., (Plenum Publishing, 1984).
Fink, Walter, Helv. Chim. Acta, 49:1408 (1966).
Fox et al., Mat. Res. Soc. Symp. Proc., 73:395-400 (1966).
Kono and Ojima, Organic Preparations and Procedures Int., 5(3):135-139 (1973).
Kruger and Rochow, J. Polymer Sci., 2A:3179-3189 (1964).
Legrow et al., "Ceramics from Hydridopopolysilazane", Mat. Res. Soc. Proc., 73:553-558 (1986).
Penn et al., J. Appl. Polymer Sci., 27(10):3752 (1982).
Schumb and Lefever, "The Ammonolysis of Hexachlorodisiloxane", J. Am. Chem. Soc., 76:5882-84 (1954).
Schwartz, Rowcliffe, Blum and Laine, Mat. Res. Soc. Symp. Proc., 73:407 (Apr. 1986).
Seyferth et al., Comm. Amer. Cer. Soc., Jan. 1983, (pp. C-13-C-14).
Seyferth and Wiseman, "Silazane Precursors to Silicon Nitride", in Ultrastructure Processing of Ceramics, Glasses and Composites, eds. Hench et al., (New York: Wiley & Sons, 1984).
Sommer and Citron, J. Org. Chem., 32:2470-72 (1967).
Washburn, Ceramic Bulletin, 46(7):667-671 (1967).
Wills et al., Ceramic Bulletin, 62(8):904-915 (1983).
Yu and Mah, Mat. Res. Soc. Symp. Proc., 73:559-564 (Apr. 1986).
Zoeckler and Laine, J. Org. Chem., 48:2539-2543 (1983).
Blum Yigal D.
Dodge Allen L.
Laine Richard M.
McLeod Jonathan M.
Platz Robert M.
Reed Dianne E.
Shaver Paul F.
SRI - International
LandOfFree
Polysilazanes and related compositions, processes and uses does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polysilazanes and related compositions, processes and uses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polysilazanes and related compositions, processes and uses will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2221477