US4374755A
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Magnesium disiloxide compounds
Assignee: EIDP Inc
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Filing: 1981-06-26
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Granted: 1983-02-22
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Expires: 2001-06-26
Abstract
Abstract Novel magnesium disiloxide compounds and methods for their preparation are disclosed. The magnesium disiloxides so obtained are useful starting materials for the preparation of active catalysts for olefin polymerizations.
Inventors
- 👤 Charles T. Berge
- 👤 Mark P. Mack
- 👤 Charles M. Starks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:21
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/0272; B01J31/0201; B01J31/0211; B01J31/26; C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0836
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
71 words
A method of preparing a magnesium disiloxide of the general formula ##STR9## by contacting a silanol of the general formula ##STR10## with magnesium metal in an inert solvent, allowing reaction to occur, then recovering magnesium disiloxide, wherein R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are, independently, hydrogen, alkyl groups, cycloalkyl groups, alkaryl groups, aralkyl groups, aryl groups or bicycloalkyl groups.
Claim 2
Independent Claim
71 words
A method of preparing a magnesium disiloxide of the general formula ##STR9## by contacting a silanol of the general formula ##STR10## with magnesium metal in an inert solvent, allowing reaction to occur, then recovering magnesium disiloxide, wherein R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are, independently, hydrogen, alkyl groups, cycloalkyl groups, alkaryl groups, aralkyl groups, aryl groups or bicycloalkyl groups.
Claim 3
Independent Claim
93 words
A method of preparing a magnesium disiloxide of the general formula ##STR11## by contacting a silanol of the general formula ##STR12## with a magnesium compound of the general formula R 7 --Mg R 8 in an inert solvent, allowing reaction to occur, then recovering magnesium disiloxide, wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 are, independently, hydrogen, alkyl groups, cycloalkyl groups, aralkyl groups, aryl groups or bicycloalkyl groups each containing from 1 to 20 carbon atoms.
Claim 4
Independent Claim
93 words
A method of preparing a magnesium disiloxide of the general formula ##STR11## by contacting a silanol of the general formula ##STR12## with a magnesium compound of the general formula R 7 --Mg R 8 in an inert solvent, allowing reaction to occur, then recovering magnesium disiloxide, wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 are, independently, hydrogen, alkyl groups, cycloalkyl groups, aralkyl groups, aryl groups or bicycloalkyl groups each containing from 1 to 20 carbon atoms.
Claim 5
Independent Claim
84 words
A method of preparing a magnesium disiloxide of the general formula ##STR13## by contacting a silyl chloride of the general formula ##STR14## with magnesium hydroxide in an inert solvent to initiate a reaction, allowing the reaction to occur, then recovering magnesium disiloxide, wherein R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are, independently, hydrogen, alkyl groups, cycloalkyl groups, aralkyl groups, aryl groups of bicycloalkyl each containing from 1 to 20 carbon atoms or hydride.
Claim 6
Independent Claim
84 words
A method of preparing a magnesium disiloxide of the general formula ##STR13## by contacting a silyl chloride of the general formula ##STR14## with magnesium hydroxide in an inert solvent to initiate a reaction, allowing the reaction to occur, then recovering magnesium disiloxide, wherein R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are, independently, hydrogen, alkyl groups, cycloalkyl groups, aralkyl groups, aryl groups of bicycloalkyl each containing from 1 to 20 carbon atoms or hydride.
Claim 7
Independent Claim
109 words
A method of preparing a magnesium disiloxide of the general formula ##STR15## by contacting a silating agent of general formula ##STR16## with magnesium hydroxide in an inert solvent to initiate a reaction, allowing the reaction to occur, then recovering the magnesium disiloxide, wherein n is 1 or 2 and where R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are, independently, hydrogen, alkyl groups, cycloalkyl groups, alkaryl groups, aralkyl groups, aryl groups or bicycloalkyl groups, and wherein when n=1, Z is selected from the group consisting of ##STR17## and when n=2, Z is selected from the group consisting of ##STR18##
Claim 8
Independent Claim
109 words
A method of preparing a magnesium disiloxide of the general formula ##STR15## by contacting a silating agent of general formula ##STR16## with magnesium hydroxide in an inert solvent to initiate a reaction, allowing the reaction to occur, then recovering the magnesium disiloxide, wherein n is 1 or 2 and where R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are, independently, hydrogen, alkyl groups, cycloalkyl groups, alkaryl groups, aralkyl groups, aryl groups or bicycloalkyl groups, and wherein when n=1, Z is selected from the group consisting of ##STR17## and when n=2, Z is selected from the group consisting of ##STR18##
Claim 9
Independent Claim
92 words
A method of preparing a magnesium disiloxide of the general formula ##STR19## by contacting a silanate of the general formula ##STR20## where M is a Group I metal, with at least one magnesium halide in an inert solvent to initiate a reaction, allowing the reaction to occur, then recovering magnesium disiloxide, wherein R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are, independently, hydrogen, alkyl groups, cycloalkyl groups, aralkyl groups, aryl groups or bicycloalkyl groups each containing from 1 to 20 carbon atoms.
Claim 10
Independent Claim
92 words
A method of preparing a magnesium disiloxide of the general formula ##STR19## by contacting a silanate of the general formula ##STR20## where M is a Group I metal, with at least one magnesium halide in an inert solvent to initiate a reaction, allowing the reaction to occur, then recovering magnesium disiloxide, wherein R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are, independently, hydrogen, alkyl groups, cycloalkyl groups, aralkyl groups, aryl groups or bicycloalkyl groups each containing from 1 to 20 carbon atoms.
Claim 11
Dependent Claim
36 words
A method as described in claim 5 wherein R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are alkyl groups containing from 1 to 4 carbon atoms.
Claim 12
Dependent Claim
33 words
A method as described in claim 6 wherein a mixture of magnesium and MgX 2 is contacted with a silanol, wherein X is selected from the group consisting of chlorine, bromine, and iodine.
Claim 13
Dependent Claim
29 words
A method as described in claim 7 wherein TiCl 4 is contacted with the reaction product of magnesium and MgX 2 mixture and silanol to form a polymerization catalyst.
Claim 14
Dependent Claim
16 words
A method as described in claim 7 wherein the inert hydrocarbon diluent is a saturated hydrocarbon.
Claim 15
Dependent Claim
25 words
A method as described in claim 8 wherein the inert hydrocarbon diluent is selected from the group consisting of n-hexane, n-heptane, n-octane, toluene, benzene, xylenes.
Claim 16
Dependent Claim
25 words
A method as described in claim 10 wherein the reaction is allowed to proceed at temperatures of from about -20° C. to about 100° C.
Claim 17
Dependent Claim
110 words
A catalyst prepared by (a) placing magnesium disiloxides of the general formula ##STR21## in contact with at least one material selected from the group consisting of Mg and MgX 2 in an inert hydrocarbon diluent; (b) adding a Group 4b to Group 8 transition metal compound to form a solid precipitate, then; (c) recovering the solid precipitate as a catalyst wherein R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are, independently hydrogen, alkyl groups, aralkyl groups, alkaryl groups, cycloalkyl groups, aryl groups or bicycloalkyl groups containing from 1 to 20 carbon atoms, and wherein X is chlorine, bromine or iodine.
Claim 18
Dependent Claim
110 words
A catalyst prepared by (a) placing magnesium disiloxides of the general formula ##STR21## in contact with at least one material selected from the group consisting of Mg and MgX 2 in an inert hydrocarbon diluent; (b) adding a Group 4b to Group 8 transition metal compound to form a solid precipitate, then; (c) recovering the solid precipitate as a catalyst wherein R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are, independently hydrogen, alkyl groups, aralkyl groups, alkaryl groups, cycloalkyl groups, aryl groups or bicycloalkyl groups containing from 1 to 20 carbon atoms, and wherein X is chlorine, bromine or iodine.
References Cited (Backward Citations)
US2762825A
Cited
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