US4895919A
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Spirobiindane copolysiloxanecarbonates and method for their preparation
Assignee: SABIC Global Technologies BV
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Filing: 1988-10-07
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Granted: 1990-01-23
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Expires: 2008-10-07
Abstract
Abstract Copolysiloxanecarbonate compositions are prepared by the reaction of a carbonate precursor such as phosgene with a mixture of bisphenols including a spirobiindane bisphenol, at least one of said bisphenols containing polydiorganosiloxane moieties. The reaction may take place in one step or sequentially. The products are characterized by low processing temperature, low orientational birefringence and high ductility.
Inventors
- 👤 Gary R. Faler
- 👤 David M. Dardaris
- 👤 Donald G. LeGrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:27
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/448; C08G64/00; C08G64/04; C08G64/06; C08G64/08; C08G64/085
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
126 words
A copolysiloxanecarbonate composition comprising structural units of the formulas ##STR6## wherein: A 1 is ##STR7## A 2 is ##STR8## R 1 is a hydrocarbon radical, each of R 2 and R 3 is independently C 1-4 alkyl or halo, each of R 4 and R 5 is independently C 1-4 alkyl or phenyl, m is 0-4, n is 0-3, each of x and y has an average value of about 0-200 and the average value of x+y is at least about 5, w is 0 when x is 0 and at least 1 when x is greater than 0, and z is 0 when y is 0 and at least 1 when y is greater than 0; at least one of w and z being 1.
Claim 2
Dependent Claim
126 words
A copolysiloxanecarbonate composition comprising structural units of the formulas ##STR6## wherein: A 1 is ##STR7## A 2 is ##STR8## R 1 is a hydrocarbon radical, each of R 2 and R 3 is independently C 1-4 alkyl or halo, each of R 4 and R 5 is independently C 1-4 alkyl or phenyl, m is 0-4, n is 0-3, each of x and y has an average value of about 0-200 and the average value of x+y is at least about 5, w is 0 when x is 0 and at least 1 when x is greater than 0, and z is 0 when y is 0 and at least 1 when y is greater than 0; at least one of w and z being 1.
Claim 3
Dependent Claim
10 words
A composition according to claim 1 wherein n is 0.
Claim 4
Dependent Claim
20 words
A composition according to claim 2 wherein each of R 4 and R 5 is methyl and m is 0.
Claim 5
Dependent Claim
11 words
A composition according to claim 3 wherein R 1 is methyl.
Claim 6
Dependent Claim
17 words
A composition according to claim 4 which contains about 65-80% by number of units of formula I.
Claim 7
Dependent Claim
27 words
A composition according to claim 5 wherein the number ratio of diorganosiloxane units to A 1 and A 2 moieties is in the range of about 0.1-4.0:1.
Claim 8
Dependent Claim
39 words
A composition according to claim 6 which contains about 70-75% by number of units of formula I, and wherein the number ratio of diorganosiloxane units to A 1 and A 2 moieties is in the range of about 0.8-1.2:1.
Claim 9
Independent Claim
154 words
A method for preparing a copolysiloxanecarbonate composition which comprises effecting reaction between: (A) a carbonate precursor, (B) at least one spirobiindanol compound of the formula ##STR9## (C) at least one dihydroxyaromatic compound of the formula ##STR10## wherein: A 1 is ##STR11## A 2 is ##STR12## R 1 is a hydrocarbon or halohydrocarbon radical, each of R 2 and R 3 is independently C 1-4 alkyl or halo, each of R 4 and R 5 is independently C 1-4 alkyl or phenyl, m is 0-4, n is 0-3, each of x and y has an average value of about 0-200 and the average value of x+y is at least about 5, w is 0 when x is 0 and at least 1 when x is greater than 0, and z is 0 when y is 0 and at least 1 when y is greater than 0; at least one of w and z being 1.
Claim 10
Independent Claim
154 words
A method for preparing a copolysiloxanecarbonate composition which comprises effecting reaction between: (A) a carbonate precursor, (B) at least one spirobiindanol compound of the formula ##STR9## (C) at least one dihydroxyaromatic compound of the formula ##STR10## wherein: A 1 is ##STR11## A 2 is ##STR12## R 1 is a hydrocarbon or halohydrocarbon radical, each of R 2 and R 3 is independently C 1-4 alkyl or halo, each of R 4 and R 5 is independently C 1-4 alkyl or phenyl, m is 0-4, n is 0-3, each of x and y has an average value of about 0-200 and the average value of x+y is at least about 5, w is 0 when x is 0 and at least 1 when x is greater than 0, and z is 0 when y is 0 and at least 1 when y is greater than 0; at least one of w and z being 1.
Claim 11
Dependent Claim
11 words
A method according to claim 8 wherein reagent A is phosgene.
Claim 12
Dependent Claim
10 words
A method according to claim 9 wherein n is 0.
Claim 13
Dependent Claim
22 words
A method according to claim 10 wherein the reaction is effected under interfacial conditions in water and a substantially water-immiscible organic solvent.
Claim 14
Dependent Claim
13 words
A method according to claim 11 wherein the organic solvent is methylene chloride.
Claim 15
Dependent Claim
20 words
A method according to claim 12 wherein each of R 4 and R 5 is methyl and m is 0.
Claim 16
Dependent Claim
11 words
A method according to claim 13 wherein R 1 is methyl.
Claim 17
Dependent Claim
14 words
A method according to claim 14 wherein w is 0 and z is 1.
Claim 18
Dependent Claim
14 words
A method according to claim 14 wherein w is 1 and z is 0.
Claim 19
Dependent Claim
42 words
A method according to claim 14 wherein the reaction is conducted sequentially by initially converting at least one of reagents B and C to a bischloroformate composition, adding a further portion of at least one of reagents B and C and phosgenating.
Claim 20
Dependent Claim
28 words
A method according to claim 17 wherein reagent B is present in the amount of about 65-80 mole percent, based on the total of reagents B and C.
Claim 21
Dependent Claim
34 words
A method according to claim 18 wherein the number ratio of diorganosiloxane units to A 1 and A 2 moieties in reagents B and C taken together is in the range of about 0.1-4.0:1.
Claim 22
Dependent Claim
56 words
A method according to claim 19 wherein reagent B is present in the amount of about 70-75 mole percent, based on the total of reagents B and C, and the number ratio of diorganosiloxane units to A 1 and A 2 moieties in reagents B and C taken together is in the range of about 0.8-1.2:1.
References Cited (Backward Citations)
US3207814A
Cited
US3277055A
Cited
US3679774A
Cited
US3821325A
Cited
US3832419A
Cited
US4167536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-22 | 1993-07-24 | 1994-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-22 | 1997-07-24 | 1998-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-22 | 2001-07-24 | 2002-01-23 | $7700.00 | Window Closed / Lapsed |