Patent US4998150A successfully refreshed from Google Patents.
Patent US4104259A successfully refreshed from Google Patents.
US4104259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fireproof polyesters from brominated dihydroxy alkoxy-diphenyl sulfones
Assignee: Toyobo Co Ltd
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Filing: 1975-11-18
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Granted: 1978-08-01
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Expires: 1995-11-18
Abstract
Abstract A fireproof linear aromatic polyester having a high stability to ultraviolet rays and heat contains a unit of the formula: ##STR1## WHEREIN R 1 and R 2 are each a straight or branched alkylene group having 1 to 5 carbon atoms and n 1 and n 2 are each an integer of from 1 to 4. The addition of an organic pentavalent phosphorus compound may improve the fireproof properties of products prepared from said polyesters.
Inventors
- 👤 Yasuo Kato
- 👤 Tadashi Ikegami
- 👤 Junichi Harukawa
- 👤 Katsuhiko Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:13
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08G; C08G63/00; C08G63/68; C08G63/682; C08G63/6824; C08G63/6826; C08G63/688; C08G63/6884; C08G63/6886; C08L; C08L67/00; C08L67/02; C08L85/00; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
186 words
A fireproof composition comprising a linear aromatic polyester having in its molecular chain a unit of the formula: ##STR14## wherein R 1 and R 2 are each a straight or branched alkylene group having 1 to 5 carbom atoms and n 1 and n 2 are each of an integer of 1 to 4, said unit being contained in an amount of from about 3 to 30 percent by weight in terms of bromine based on the weight of said polyester, said polyester being prepared by a process comprising polycondensing at least one diol component with at least one dicarboxylic acid component, the diol component containing a brominated compound containing said unit, further including an organic compound of pentavalent phosphorous selected from at least one member of the group consisting of a phosphoric ester, a phosphonic ester, a phosphinic ester and a high molecular weight phosphorus compound having a degree of polymerization of 5 to 100 and wherein said organic phosphorus compound is incorporated into the polyester in an amount of not more than about 1.0 percent by weight based on the weight of the polyester.
Claim 2
Dependent Claim
186 words
A fireproof composition comprising a linear aromatic polyester having in its molecular chain a unit of the formula: ##STR14## wherein R 1 and R 2 are each a straight or branched alkylene group having 1 to 5 carbom atoms and n 1 and n 2 are each of an integer of 1 to 4, said unit being contained in an amount of from about 3 to 30 percent by weight in terms of bromine based on the weight of said polyester, said polyester being prepared by a process comprising polycondensing at least one diol component with at least one dicarboxylic acid component, the diol component containing a brominated compound containing said unit, further including an organic compound of pentavalent phosphorous selected from at least one member of the group consisting of a phosphoric ester, a phosphonic ester, a phosphinic ester and a high molecular weight phosphorus compound having a degree of polymerization of 5 to 100 and wherein said organic phosphorus compound is incorporated into the polyester in an amount of not more than about 1.0 percent by weight based on the weight of the polyester.
Claim 3
Dependent Claim
62 words
The fireproof composition according to claim 1, wherein the phosphoric ester is from at least one member of the group consisting of triphenyl phosphate, tricresyl phosphate, tridecyl phosphate, trinonylphenyl phosphate, phenyldidecyl phosphate, diphenyldecyl phosphate and phosphorus compounds of the formula: ##STR15## wherein R 3 is a monovalent hydrocarbon group of 1 to 18 carbon atoms and n 3 is 0 to 1.
Claim 4
Dependent Claim
39 words
The fireproof composition according to claim 2, wherein said organic phosphorus compound has as R 3 a radical selected from at least one member of the group consisting of methyl, ethyl, propyl, butyl, cyclohexyl, phenyl, p-cresyl, o-cresyl and naphthyl.
Claim 5
Dependent Claim
30 words
The fireproof composition according to claim 1, wherein the phosphonic ester is selected from at least one member of the group consisting of diphenylbenzene phosphonate, diphenylmethane phosphonate and diphenylethane phsophonate.
Claim 6
Dependent Claim
14 words
The fireproof composition according to claim 1, wherein the phosphinic ester is phenyldibenzene phosphinate.
Claim 7
Dependent Claim
63 words
The fireproof composition according to claim 1, wherein the high molecular weight phosphorus compound has a recurring unit of the formula: ##STR16## wherein R 4 is a monovalent hydrocarbon group of 1 to 18 carbon atoms, R 5 is a divalent hydrocarbon group of 1 to 20 carbon atoms, n 4 is 0 to 1 and n 5 is from 5 to 100.
Claim 8
Dependent Claim
33 words
The fireproof composition according to claim 6, wherein R 4 is selected from at least one member of the group consisting of methyl, ethyl, propyl, butyl, pentyl, cyclohexyl, phenyl, cresyl, xylyl and naphthyl.
Claim 9
Dependent Claim
18 words
The fireproof composition according to claim 6, wherein the R 4 group is substituted by chlorine or bromine.
Claim 10
Dependent Claim
79 words
The fireproof composition according to claim 6, wherein R 5 is selected from at least one member of the group consisting of 1,4-butylene, 1,4-phenylene, 1,3-phenylene, 4,4'-biphenylene or a group of the formula: ##STR17## wherein R 6 is the same or different and is hydrogen or methyl and X is selected from at least one member of the group consisting of divalent hydrocarbon group of 1 to 6 carbon atoms, --CO--, --SO 2 --, --O--, --CONH-- or --SO 2 NH--.
Claim 11
Dependent Claim
18 words
The fireproof composition according to claim 9, wherein the R 5 group is substituted by chlorine or bromine.
Claim 12
Dependent Claim
30 words
The fireproof composition according to claim 1, wherein the amount of the organic phosphorus compound is not more than 0.7 percent by weight based on the weight of the polyester.
References Cited (Backward Citations)
US3787526A
Cited
US3794617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-31 | 1982-01-30 | 1982-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-31 | 1986-01-30 | 1986-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-31 | 1990-01-30 | 1990-08-01 | $7700.00 | Window Closed / Lapsed |