US4728716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycarbonate exhibiting improved impact properties containing divalent residue of polymerized alkadiene monomer
Assignee: General Electric Co
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Filing: 1985-11-12
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Granted: 1988-03-01
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Expires: 2005-11-12
Abstract
Abstract An aromatic carbonate resin comprised of: (i) at least one recurring structural unit represented by the formula ##STR1## (ii) at least one recurring structural unit selected from structural units represented by the formulae ##STR2## wherein R is independently selected from halogen, monovalent hydrocarbon, and monovalent hydrocarbonoxy radicals; W is selected from divalent hydrocarbon radicals, --O--, --S--, --S--S--, ##STR3## A is a divalent residue of at least one conjugated alkadiene and has a weight average molecular weight of at least about 600, m is independently selected from integers having a value of from 0 to 4, and b is either zero or one. The carbonate resin contains an amount of (ii) at least effective to improve the impact properties thereof.
Inventors
- 👤 Victor Mark, deceased
- 👤 legal representative Ester H. Mark
- 👤 Edward N. Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:09
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/04; C08G64/06
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
108 words
An aromatic carbonate resin comprised of: (i) at least one recurring structural unit represented by the formula ##STR18## and (ii) at least one recurring structural unit selected from structural units represented by the formulae ##STR19## or mixtures thereof; wherein R is independently selected from halogen, monovalent hydrocarbon radicals, or monovalent hydrocarbonoxy radicals, W is selected from divalent hydrocarbon radicals, --O--, --S--, --S--S--, ##STR20## A is the divalent residue of at least one polymerized conjugated alkadiene and has a weight average molecular weight of at least about 600, m is independently selected from integers having a value of from 0 to 4, and b is either zero or one.
Claim 2
Dependent Claim
108 words
An aromatic carbonate resin comprised of: (i) at least one recurring structural unit represented by the formula ##STR18## and (ii) at least one recurring structural unit selected from structural units represented by the formulae ##STR19## or mixtures thereof; wherein R is independently selected from halogen, monovalent hydrocarbon radicals, or monovalent hydrocarbonoxy radicals, W is selected from divalent hydrocarbon radicals, --O--, --S--, --S--S--, ##STR20## A is the divalent residue of at least one polymerized conjugated alkadiene and has a weight average molecular weight of at least about 600, m is independently selected from integers having a value of from 0 to 4, and b is either zero or one.
Claim 3
Dependent Claim
20 words
The resin of claim 1 which contains an amount of (ii) at least effective to improve the impact properties thereof.
Claim 4
Dependent Claim
27 words
The resin of claim 2 wherein said amount of (ii) is at least about 1.0 weight percent, based on the total amounts of (i) and (ii) present.
Claim 5
Dependent Claim
15 words
The resin of claim 3 wherein said amount is at least about 2 weight percent.
Claim 6
Dependent Claim
15 words
The resin of claim 4 wherein said amount is at least about 3 weight percent.
Claim 7
Dependent Claim
15 words
The resin of claim 5 wherein said amount is at least about 4 weight percent.
Claim 8
Dependent Claim
21 words
The resin of claim 1 which contains an amount of (ii) effective to impart to said resin rubbery and elastomeric properties.
Claim 9
Dependent Claim
47 words
The resin of claim 1 wherein said conjugated alkadiene is a monomer represented by the formula ##STR21## wherein R 1 -R 6 are independently selected from hydrogen, halogen, or alkyl radicals, with the proviso that not more than two of R 1 -R 6 are halogen radicals.
Claim 10
Dependent Claim
18 words
The resin of claim 8 wherein R 1 -R 6 are independently selected from hydrogen or alkyl radicals.
Claim 11
Dependent Claim
16 words
The resin of claim 9 wherein said alkadiene is selected from 1,3-butadiene, 2-methyl-1,3-butadiene, or mixtures thereof.
Claim 12
Dependent Claim
19 words
The resin of claim 1 wherein (ii) is at least one recurring structural unit represented by the formula ##STR22##
Claim 13
Dependent Claim
9 words
The resin of claim 11 wherein b is one.
Claim 14
Dependent Claim
9 words
The resin of claim 11 wherein W is 2,2-propylidene.
Claim 15
Dependent Claim
9 words
The resin of claim 13 wherein m is zero.
Claim 16
Dependent Claim
19 words
The resin of claim 1 wherein (ii) is at least one recurring structural unit represented by the formula ##STR23##
Claim 17
Dependent Claim
9 words
The resin of claim 15 wherein b is one.
Claim 18
Dependent Claim
9 words
The resin of claim 16 wherein W is 2,2-propylidene.
Claim 19
Dependent Claim
9 words
The resin of claim 17 wherein m is zero.
References Cited (Backward Citations)
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US4415722A
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Cited
US4526956A
Cited
US4476294A
Cited
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Cited
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US4628081A
Cited
US4677183A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |