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US4645848A
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Phenylene group-containing organopolysiloxanes and method for their preparation
Assignee: Evonik Operations GmbH
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Filing: 1986-05-21
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Granted: 1987-02-24
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Expires: 2006-05-21
Abstract
Abstract Phenylene group-containing organopolysiloxanes formed of a plurality of identical or different units represented by the structural formula: ##STR1## where in each case all three possible isomers in relation to the position of the SiO 3/2 --R 1 substituents on the phenylene group can be present concurrently, in which R 1 stands for --CH 2 --CH 2 -- or CH 3 --CH< and the free valences of the oxygen atoms are saturated by silicon atoms of other groups of formula (1) and/or by cross-linking bridge groups. A process for the preparation of these polysiloxanes and the use thereof for the synthesis of carriers of active substances is also disclosed.
Inventors
- 👤 Peter Panster
- 👤 Peter Kleinschmit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:22
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C08G77/50; C08G77/52; C08G77/58; C12; C12N; C12N11/00; C12N11/02; C12N11/08; C12N11/089
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
130 words
A phenylene group-containing organopolysiloxane comprising a plurality of identical or different units represented by the structural formula: ##STR19## where in each case all three possible isomers in relation to the position of the SiO 3/2 --R 1 substituents on the phenylene group can be present concurrently, in which the bridge groups R 1 represent --CH 2 --CH 2 -- or CH 3 --CH< and can be identical or different, and the free valences of the oxygen atoms are saturated by silicon atoms of other groups of formula (1) and/or by cross-linking bridge groups: ##STR20## in which R' is a methyl or ethyl group, and the ratio of the sum of the Si atoms in formula (1) to the bridge atoms silicon, titanium, zirconium, and aluminum can be 1:0 to 1:15.
Claim 2
Dependent Claim
130 words
A phenylene group-containing organopolysiloxane comprising a plurality of identical or different units represented by the structural formula: ##STR19## where in each case all three possible isomers in relation to the position of the SiO 3/2 --R 1 substituents on the phenylene group can be present concurrently, in which the bridge groups R 1 represent --CH 2 --CH 2 -- or CH 3 --CH< and can be identical or different, and the free valences of the oxygen atoms are saturated by silicon atoms of other groups of formula (1) and/or by cross-linking bridge groups: ##STR20## in which R' is a methyl or ethyl group, and the ratio of the sum of the Si atoms in formula (1) to the bridge atoms silicon, titanium, zirconium, and aluminum can be 1:0 to 1:15.
Claim 3
Dependent Claim
81 words
A process for the preparation of compounds according to claim 1, comprising hydrolyzing and polycondensing a silane represented by the structural formula: ##STR21## in which the bridge groups R 1 represent the groups --CH 2 --CH 2 -- or CH 3 --CH< and can be identical or different, and the substituents R 2 represent a linear or branched alkoxy group having 1 to 3 carbon atoms, or chloride, and can be identical or different, with stoichiometric or excess amounts of water.
Claim 4
Dependent Claim
64 words
The process according to claim 2 wherein the reaction is carried out in the presence of a solvent and/or a cross-linking agent precursor of the general formula: MeR.sub.2-4.sup.3 R'.sub.0-2 or MeR.sub.2-3.sup.3 R'.sub.0-1 in which Me=Si, Ti, Zr or Al, R 3 represents a linear or branched alkoxy group having 1 to 5 carbon atoms or chloride and R' is a methyl or ethyl group.
Claim 5
Dependent Claim
21 words
The process according to claim 2 further comprising separating the product from the liquid phase after the addition of another solvent.
Claim 6
Dependent Claim
13 words
The process according to claim 2 further comprising washing and drying the product.
Claim 7
Dependent Claim
27 words
The process according to claim 5 wherein the drying is carried out under a protective atmosphere or in vacuum at a temperature of up to 200° C.
Claim 8
Dependent Claim
36 words
The process according to claim 2 further comprising tempering for 1 hour to 5 days at temperatures of 100°-400° C., in air or under a protective gas, at standard pressure, in vacuum or at gage pressure.
Claim 9
Dependent Claim
12 words
The process according to claim 5 further comprising grinding the dried product.
Claim 10
Dependent Claim
12 words
The process according to claim 8 further comprising classifying the ground product.
Claim 11
Dependent Claim
34 words
The process of claim 3, wherein the solvent is a member selected from the group consisting of methanol, ethanol, n-propanol and isopropanol, n-butanol and isobutanol, n-pentanol, toluene, xylene, chlorinated hydrocarbons, acetone, and dialkyl ether.
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) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |