公开(公告)号：AU6219996A

公开(公告)日：1997-03-06

申请号：AU6219996

申请日：1996-08-22

Applicant: CORNING INC

Inventor： HENDERSON DANNY LEE ,  POWERS DALE ROBERT

IPC: G02B6/00 ,  C03B8/04 ,  C03B19/06 ,  C03B19/14 ,  C03B20/00 ,  C03B37/014 ,  C03B37/018 ,  C03C1/02 ,  C03C3/06 ,  C03C13/04 ,  C07F7/20 ,  C07F7/21 ,  C08G77/04 ,  C08L83/04 ,  C08G77/34

Abstract: The present invention is directed to a purified polyalkylsiloxane composition having a boiling point, under atmospheric conditions, of less than about 250 DEG C and containing high boiling impurities, including siloxanes and silanol-terminated siloxanes, that have boiling points, under atmospheric conditions, of greater than about 250 DEG C in a total concentration of less than 14 ppm. The present invention is further directed to a method of producing a purified polyalkylsiloxane composition, having a boiling point, under atmospheric conditions, of less than about 250 DEG C, by distilling a polyalkylsiloxane starting material containing high boiling impurities having boiling points, under atmospheric conditions, of greater than about 250 DEG C in a total concentration of at least 14 ppm, under conditions effective to produce a purified polyalkylsiloxane composition having a boiling point under atmospheric conditions of less than about 250 DEG C, and containing high boiling impurities, having boiling points, under atmospheric conditions, of greater than about 250 DEG C, in a total concentration of less than 14 ppm. In preferred embodiments, low boiling components (including silanols and preferably also hexamethylcyclotrisiloxane) are reduced to less than about 100 ppm. The present invention is further directed to a method of producing fused silica glass by conversion of the purified polyalkylsiloxane composition.

公开(公告)号：AU714751B2

公开(公告)日：2000-01-13

申请号：AU6219996

申请日：1996-08-22

Applicant: CORNING INC

Inventor： HENDERSON DANNY LEE ,  POWERS DALE ROBERT

IPC: G02B6/00 ,  C03B8/04 ,  C03B19/06 ,  C03B19/14 ,  C03B20/00 ,  C03B37/014 ,  C03B37/018 ,  C03C1/02 ,  C03C3/06 ,  C03C13/04 ,  C07F7/20 ,  C07F7/21 ,  C08G77/04 ,  C08L83/04 ,  C08G77/34

Abstract: The present invention is directed to a purified polyalkylsiloxane composition having a boiling point, under atmospheric conditions, of less than about 250 DEG C and containing high boiling impurities, including siloxanes and silanol-terminated siloxanes, that have boiling points, under atmospheric conditions, of greater than about 250 DEG C in a total concentration of less than 14 ppm. The present invention is further directed to a method of producing a purified polyalkylsiloxane composition, having a boiling point, under atmospheric conditions, of less than about 250 DEG C, by distilling a polyalkylsiloxane starting material containing high boiling impurities having boiling points, under atmospheric conditions, of greater than about 250 DEG C in a total concentration of at least 14 ppm, under conditions effective to produce a purified polyalkylsiloxane composition having a boiling point under atmospheric conditions of less than about 250 DEG C, and containing high boiling impurities, having boiling points, under atmospheric conditions, of greater than about 250 DEG C, in a total concentration of less than 14 ppm. In preferred embodiments, low boiling components (including silanols and preferably also hexamethylcyclotrisiloxane) are reduced to less than about 100 ppm. The present invention is further directed to a method of producing fused silica glass by conversion of the purified polyalkylsiloxane composition.

公开(公告)号：DE69630563D1

公开(公告)日：2003-12-11

申请号：DE69630563

申请日：1996-08-16

Applicant: CORNING INC

Inventor： HENDERSON DANNY LEE ,  POWERS DALE ROBERT

IPC: G02B6/00 ,  C03B8/04 ,  C03B19/06 ,  C03B19/14 ,  C03B20/00 ,  C03B37/014 ,  C03B37/018 ,  C03C1/02 ,  C03C3/06 ,  C03C13/04 ,  C07F7/20 ,  C07F7/21 ,  C08G77/04 ,  C08L83/04

Abstract: The present invention is directed to a purified polyalkylsiloxane composition having a boiling point, under atmospheric conditions, of less than about 250 DEG C and containing high boiling impurities, including siloxanes and silanol-terminated siloxanes, that have boiling points, under atmospheric conditions, of greater than about 250 DEG C in a total concentration of less than 14 ppm. The present invention is further directed to a method of producing a purified polyalkylsiloxane composition, having a boiling point, under atmospheric conditions, of less than about 250 DEG C, by distilling a polyalkylsiloxane starting material containing high boiling impurities having boiling points, under atmospheric conditions, of greater than about 250 DEG C in a total concentration of at least 14 ppm, under conditions effective to produce a purified polyalkylsiloxane composition having a boiling point under atmospheric conditions of less than about 250 DEG C, and containing high boiling impurities, having boiling points, under atmospheric conditions, of greater than about 250 DEG C, in a total concentration of less than 14 ppm. In preferred embodiments, low boiling components (including silanols and preferably also hexamethylcyclotrisiloxane) are reduced to less than about 100 ppm. The present invention is further directed to a method of producing fused silica glass by conversion of the purified polyalkylsiloxane composition.

公开(公告)号：MX9603820A

公开(公告)日：1997-09-30

申请号：MX9603820

申请日：1996-08-30

Applicant: CORNING INC

Inventor： HENDERSON DANNY LEE ,  POWERS DALE R

IPC: G02B6/00 ,  C03B8/04 ,  C03B19/06 ,  C03B19/14 ,  C03B20/00 ,  C03B37/014 ,  C03B37/018 ,  C03C1/02 ,  C03C3/06 ,  C03C13/04 ,  C07F7/20 ,  C07F7/21 ,  C08G77/04 ,  C08L83/04 ,  C08L83/06

Abstract: La presente invencion está dirigida a una composicion de polialquilsiloxano purificada que tiene un punto de ebullicion, bajo condiciones atmosféricas, de menos de aproximadamente 250 degree C y que contiene impurezas de alto punto de ebullicion, incluyendo siloxanos y siloxanos terminados con silanol, que tienen puntos de ebullicion, bajo condiciones atmosféricas, mayores que aproximadamente 250 degree C, en una concentracion total de menos de 14 ppm, así como también a un método para producir una composicion de polialquilsiloxano purificada, que tiene un punto de ebullicion, bajo condiciones atmosféricas menor que aproximadamente 250 degree C, destilando un material de partida de polialquilsiloxano que contiene impurezas del alto punto de ebullicion, bajo condiciones atmosféricas, mayor que aproximadamente 250 degree C, en una concentracion total de por lo menos 14 ppm, bajo condiciones efectivas para producir una composicion de polialquisiloxano purificada que tiene un punto de ebullicion, bajo condiciones atmosféricas, mayor que aproximadamente 250 degree C, y que contiene impurezas de alto punto de ebullicion, que tienen puntos de ebullicion, bajo condiciones atmosféricas, mayor que aproximadamente 250 degree C, en una concentracion total de menos de 14 ppm, en las modalidades preferidas, los componentes de bajo punto de ebullicion incluyendo silanoles y preferiblemente también hexametilciclotrisiloxano se reducen a menos de aproximadamente 100 ppm, estando dirigida la presente invencion también a un método para producir vidrio de sílice fundida mediante conversion de la composicion de polialquilsiloxano purificada.

公开(公告)号：AT253584T

公开(公告)日：2003-11-15

申请号：AT96113176

申请日：1996-08-16

Applicant: CORNING INC

Inventor： HENDERSON DANNY LEE ,  POWERS DALE ROBERT

IPC: C03C3/06 ,  C07F7/20 ,  C07F7/21

公开(公告)号：BR9810245A

公开(公告)日：2000-09-19

申请号：BR9810245

申请日：1998-06-11

Applicant: CORNING INC

Inventor： BLACKWELL JEFFERY L ,  HAWTOF DANIEL WARREN ,  HENDERSON DANNY LEE ,  XIAODONG FU

IPC: C03B20/00 ,  C01B33/18 ,  C03B8/02 ,  C03B19/14 ,  C03B37/014

Abstract: The present invention is directed to a method for making silica glass and silica glass preforms. A liquid, preferably halide-free, silicon-containing compound capable of being converted by thermal oxidative decomposition to SiO2 is provided and introduced directly into the flame of a combustion burner, which converts the compound to silica, thereby forming finely divided amorphous soot. The soot is vaporized proximate the site where the liquid is converted into silica glass by atomizing the liquid, preferably with a stream of atomizing gas. A heater proximate the burner face and around the burner flame increases soot capture rate and allows for a reduction of the velocity of the atomizing gas. The amorphous soot is deposited on a receptor surface where, either substantially simultaneously with or subsequently to its deposition, the soot is consolidated into a body of fused silica glass.

公开(公告)号：BR9603621A

公开(公告)日：1998-05-19

申请号：BR9603621

申请日：1996-08-30

Applicant: CORNING INC

Inventor： POWERS DALE ROBERT ,  HENDERSON DANNY LEE

IPC: C08L83/04

公开(公告)号：CA2181329A1

公开(公告)日：1997-03-02

申请号：CA2181329

申请日：1996-07-16

Applicant: CORNING INC

Inventor： HENDERSON DANNY LEE ,  POWERS DALE ROBERT

IPC: G02B6/00 ,  C03B8/04 ,  C03B19/06 ,  C03B19/14 ,  C03B20/00 ,  C03B37/014 ,  C03B37/018 ,  C03C1/02 ,  C03C3/06 ,  C03C13/04 ,  C07F7/20 ,  C07F7/21 ,  C08G77/04 ,  C08L83/04 ,  C07F7/18

Abstract: The present invention is directed to a purified polyalkylsiloxane composition having a boiling point, under atmospheric conditions, of less than about 250.degree.C and containing high boiling impurities, including siloxanes and silanol-terminated siloxanes, that have boiling points, under atmospheric conditions, of greater than about 250.degree.C in a total concentration of less than 14 ppm. The present invention is further directed to a method of producing a purified polyalkylsiloxane composition, having a boiling point, under atmospheric conditions, of less than about 250.degree.C, by distilling a polyalkylsiloxane starting material containing high boiling impurities having boiling points, under atmospheric conditions, of greater than about 250.degree.C in a total concentration of at least 14 ppm, under conditions effective to produce a purified polyalkylsiloxane composition having a boiling point under atmospheric conditions of less than about 250.degree.C, and containing high boiling impurities, having boiling points, under atmospheric conditions, of greater than about 250.degree.C, in a total concentration of less than 14 ppm. In preferred embodiments, low boiling components (including silanols and preferably also hexamethylcyclotrisiloxane) are reduced to less than about 100 ppm. The present invention is further directed to a method of producing fused silica glass by conversion of the purified polyalkylsiloxane composition.