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    • 5. 发明授权
    • Method for forming new preceramic polymers for SiC and Si.sub.3 N4/SiC
    • 用于形成用于SiC和Si 3 N 4 / SiC的新的陶瓷前体聚合物的方法
    • US4820783A
    • 1989-04-11
    • US915134
    • 1986-10-03
    • Dietmar SeyferthTimothy G. WoodYuan-Fu Yu
    • Dietmar SeyferthTimothy G. WoodYuan-Fu Yu
    • C01B31/36C01B21/068C04B35/571C04B35/591C08G77/00C08G77/02C08G77/48C08G77/60C08L83/16D01F9/10C08F283/00
    • C08L83/16C08G77/60
    • A method of forming preceramic polymers using a organopolysilane of the formula [(RSiH).sub.x (RSi).sub.y ].sub.n, where R is a lower alkyl group having from 1 to about 6 carbon atoms, a lower alkenyl group having from 2 to about 6 carbon atoms, a substituted or unsubstituted lower aryl group having from 6 to about 10 carbons atoms, a tri(lower)alkyl- or di(lower)alkylsilyl group and n is an integer greater than 1, and reacting it with alkali metal amides or silylamides in catalytic quantities is disclosed. Preferably, the alkali metal amide is a polymeric alkali metal silylamide of the formula [(R.sup.1 SiHNH).sub.a (R.sup.1 SiN).sub.b (R.sup.1 SiHNM).sub.c ].sub.m where a+b+c=I; R.sup.1 is a lower alkyl group having from 1 to about 6 carbon atoms, a substituted or unsubstituted alkenyl group having from 2 to about 6 carbon atoms, a substituted or unsubstituted lower aryl group having from 6 to about 10 carbon atoms, a tri(lower)alkyl- or di(lower)alkylsilyl group or a di(lower)alkylamino group; M is an alkali metal or one-half equivalent of an alkaline earth metal; and n and m are integers greater than I. Novel preceramic polymers formed by this method are also disclosed.
    • 使用式[(RSiH)x(RSi)y] n的有机聚硅烷形成预陶瓷聚合物的方法,其中R是具有1至约6个碳原子的低级烷基,具有2至约6个碳原子的低级烯基 碳原子,具有6至约10个碳原子的取代或未取代的低级芳基,三(低级)烷基 - 或二(低级)烷基甲硅烷基,n是大于1的整数,并与碱金属酰胺反应或 公开了催化量的甲硅烷基酰胺。 优选地,碱金属酰胺是式[(R1SiHNH)a(R1SiN)b(R1SiHNM)c] m的聚合碱金属甲硅烷基酰胺,其中a + b + c = 1; R1是具有1至约6个碳原子的低级烷基,具有2至约6个碳原子的取代或未取代的烯基,取代或未取代的具有6至约10个碳原子的低级芳基,三(低级 )烷基或二(低级)烷基甲硅烷基或二(低级)烷基氨基; M是一种碱金属或一半当量的碱土金属; 并且n和m是大于1的整数。还公开了通过该方法形成的新型前陶瓷聚合物。
    • 6. 发明授权
    • Method for converting organosilicon polymers containing SIH repeat units
and organopolysilazane precursors to new and useful preceramic polymers
and silicon nitride enriched ceramic materials
    • US4767876A
    • 1988-08-30
    • US916109
    • 1986-10-07
    • Dietmar SeyferthJoanne M. SchwarkYuan-Fu Yu
    • Dietmar SeyferthJoanne M. SchwarkYuan-Fu Yu
    • C08G77/60C08L83/16C07F7/08C07F7/10
    • C08G77/60C08L83/16
    • A method of forming preceramic polymers using an organosilicon polymer containing Si--H repeat units by reacting it with alkali metal amide or silylamide is disclosed. Preferably, the silylamide is a polymeric silylamide formed by reacting in solution anhydrous ammonia with a mixture of R.sup.1 SiHX.sub.2 (where R.sup.1 is a lower alkyl group having from 1 to about 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having from 3 to about 6 carbon atoms, a substituted or unsubstituted lower alkenyl group having from 2 to about 6 carbon atoms or a substituted or unsubstituted lower aryl group having from 6 to about 10 carbon atoms; and X is a halogen) and R.sup.2 SiX.sub.3 (where R.sup.2 is H, a lower alkenyl group having from 1 to about 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having from 3 to about 6 carbon atoms, a substituted or unsubstituted lower alkenyl group having from 2 to about 6 carbon atoms or a substituted or unsubstituted lower aryl group having from 6 to about 10 carbon atoms). The Si--H containing organosilicon polymer is preferably selected from the group consisting of organopolysilanes of the formula [(RSiH).sub.x (RSi).sub.y ].sub.n (where R is a lower alkyl group having from 1 to about 6 carbon atoms, a lower alkenyl group having from 2 to about 6 carbon atoms, or a substituted or unsubstituted lower aryl group having from 6 to about 10 carbon atoms, and n is greater than 1), a polycarbosilane having repeat units of the formula [R.sup.a Si(H)--(CH.sub.2).sub.q ] (where R.sup.a is H, a lower alkyl group having from 1 to about 6 carbon atoms, a cycloalkyl group having from 3 to about 6 carbon atoms, or a substituted or unsubstituted lower aryl group having from 6 to about 10 carbon atoms, q is an integer 1 or greater), and a polysiloxane having repeat units of the formula [R.sup.b Si(H)O].sub.n (where R.sup.b is a lower alkyl group having from 1 to about 6 carbon atoms, a cycloalkyl group having from 3 to about 6 carbon atoms, or a substituted or unsubstituted lower aryl group having from 6 to about 10 carbon atoms, and n is an integer greater than 1).Novel preceramic polymers formed by this method are also disclosed.
    • 7. 发明授权
    • Method for forming new preceramic polymers for SiC and Si.sub.3 N.sub.4
/SiC systems
    • 用于形成用于SiC和Si 3 N 4 / SiC体系的新的陶瓷前体聚合物的方法
    • US4645807A
    • 1987-02-24
    • US756353
    • 1985-07-18
    • Dietmar SeyferthTimothy G. WoodYuan-Fu Yu
    • Dietmar SeyferthTimothy G. WoodYuan-Fu Yu
    • C01B31/36C01B21/068C04B35/571C04B35/591C08G77/00C08G77/02C08G77/48C08G77/60C08L83/16D01F9/10C08F283/00
    • C08L83/16C08G77/60
    • A method of forming preceramic polymers using a organopolysilane of the formula [(RSiH).sub.x (RSi).sub.y ].sub.n, where R is a lower alkyl group having from 1 to about 6 carbon atoms, a lower alkenyl group having from 2 to about 6 carbon atoms, a substituted or unsubstituted lower aryl group having from 6 to about 10 carbons atoms, a tri(lower)alkyl- or di(lower)alkylsilyl group and n is an integer greater than 1, and reacting it with alkali metal amides or silylamides in catalytic quantities is disclosed. Preferably, the alkali metal amide is a polymeric alkali metal silylamide of the formula [(R.sup.1 SiHNH).sub.a (R.sup.1 SiN).sub.b (R.sup.1 SiHNM).sub.c ].sub.m where a+b+c=1; R.sup.1 is a lower alkyl group having from 1 to about 6 carbon atoms, a substituted or unsubstituted alkenyl group having from 2 to about 6 carbon atoms, a substituted or unsubstituted lower aryl group having from 6 to about 10 carbon atoms, a tri(lower)alkyl- or di(lower)alkylsilyl group or a di(lower)alkylamino group; M is an alkali metal or one-half equivalent of an alkaline earth metal; and n and m are integers greater than 1. Novel preceramic polymers formed by this method are also disclosed.
    • 使用式[(RSiH)x(RSi)y] n的有机聚硅烷形成预陶瓷聚合物的方法,其中R是具有1至约6个碳原子的低级烷基,具有2至约6个碳原子的低级烯基 碳原子,具有6至约10个碳原子的取代或未取代的低级芳基,三(低级)烷基 - 或二(低级)烷基甲硅烷基,n是大于1的整数,并与碱金属酰胺反应或 公开了催化量的甲硅烷基酰胺。 优选地,碱金属酰胺是式[(R1SiHNH)a(R1SiN)b(R1SiHNM)c] m的聚合碱金属甲硅烷基酰胺,其中a + b + c = 1; R1是具有1至约6个碳原子的低级烷基,具有2至约6个碳原子的取代或未取代的烯基,取代或未取代的具有6至约10个碳原子的低级芳基,三(低级 )烷基或二(低级)烷基甲硅烷基或二(低级)烷基氨基; M是一种碱金属或一半当量的碱土金属; 并且n和m是大于1的整数。还公开了通过该方法形成的新型陶瓷前体聚合物。
    • 10. 发明授权
    • Organopolysilazane precursors to silicon nitride-rich mixed SiC/Si.sub.3
N.sub.4
    • 富硅氮化物混合SiC / Si3N4的有机聚硅氮烷前体
    • US4720532A
    • 1988-01-19
    • US899471
    • 1986-08-22
    • Dietmar SeyferthJoanne M. Schwark
    • Dietmar SeyferthJoanne M. Schwark
    • C04B35/571C04B35/589C08G77/48C08G77/62C08G77/04
    • C08G77/62C04B35/571C04B35/589
    • A method for preparing preceramic polymers is disclosed. This method includes the steps of(1) reacting in solution anhydrous ammonia with a mixture of R.sup.1 SiHX.sub.2 (where R.sup.1 is a lower alkyl group having from 1 to about 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having from 3 to about 6 carbon atoms, a substituted or unsubstituted lower alkenyl group having from 2 to about 6 carbon atoms, or a substituted or unsubstituted lower aryl group having from 6 to about 10 carbon atoms, and X is a halogen) and RSiX.sub.3 (where R is H, a lower alkyl group having from 1 to about 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having from 3 to about 6 carbon atoms, a substituted or unsubstituted lower alkenyl group having from 2 to about 6 carbon atoms, or a substituted or unsubstituted lower aryl group having from 6 to about 10 carbon atoms), thereby forming a mixture of precursor polymers; and reacting the precursor polymers in the presence of a basic catalyst capable of deprotonating the NH functions in the precursor polymers to form the preceramic polymer. Preferably, this preceramic polymer is treated with an electrophile compound. Pyrolyzing the polymer in an inert gas stream or ammonia atmosphere to form a ceramic material is also disclosed.
    • 公开了一种制备预陶瓷聚合物的方法。 该方法包括以下步骤:(1)使无水氨溶液与R1SiHX2(其中R1是具有1至约6个碳原子的低级烷基,具有3至约6个碳原子的取代或未取代的环烷基) ,具有2至约6个碳原子的取代或未取代的低级烯基,或具有6至约10个碳原子的取代或未取代的低级芳基,X为卤素)和RSiX 3(其中R为H,较低级 具有1至约6个碳原子的烷基,取代或未取代的具有3至约6个碳原子的环烷基,取代或未取代的具有2至约6个碳原子的低级烯基,或取代或未取代的低级芳基 具有6至约10个碳原子),从而形成前体聚合物的混合物; 以及在能够使前体聚合物中的NH官能团去质子化的碱性催化剂存在下使前体聚合物反应以形成预陶瓷聚合物。 优选地,该前陶瓷聚合物用亲电子试剂化合物处理。 还公开了在惰性气体流或氨气氛中热解聚合物以形成陶瓷材料。