US4751323A
Expired / Lapsed
US
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Novel polyaromatic cyanates
Assignee: Dow Chemical Co
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Filing: 1983-11-16
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Granted: 1988-06-14
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Expires: 2003-11-16
Abstract
Abstract This invention relates to a polyaromatic cyanate which corresponds to the formula ##STR1## wherein Ar is an aromatic radical; B is a C 7-20 polycyclic aliphatic radical; D is independently in each occurrence any non-active hydrogen-containing substituent; q, r and s are independently in each occurrence the integers b 0, 1, 2, l or b 3l ; with the proviso that the sum of q, 4 and s is greater than or equal to 2; t is independently in each occurrence an integer of between about 0 and 4 inclusive; and x is a number between about 0 and 5 inclusive. Another aspect of this invention is a novel polytriazine which comprises the reaction product of the polyaromatic cyanate esters of this invention. The novel polytriazines may further comprise the reaction product of the novel polyaromatic cyanates of this invention in admixture with other cyanates known in the art as useful for the preparation of polytriazines.
Inventors
- 👤 Edmund P. Woo
- 👤 Daniel J. Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:51
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0622; C08G73/0638; C08G73/065; C08G73/0655; C07; C07C; C07C261/00; C07C261/02; C07C2603/00; C07C2603/56; C07C2603/58; C07C2603/60; C07C2603/66; C07C2603/68
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
93 words
A polyaromatic cyanate which corresponds to the formula ##STR13## wherein: Ar is an aromatic radical; B is a C 7-20 polycyclic aliphatic radical; D is independently in each occurrence any nonactive hydrogen-containing substituent; q, r and s are independently in each occurence the integers 0, 1, 2, or 3; with the proviso that the sum of q, r and s is greater than or equal to 2; t is independently in each occurrence an integer of between about 0 and 4 inclusive; and x is a number between about 0 and 5 inclusive.
Claim 2
Dependent Claim
93 words
A polyaromatic cyanate which corresponds to the formula ##STR13## wherein: Ar is an aromatic radical; B is a C 7-20 polycyclic aliphatic radical; D is independently in each occurrence any nonactive hydrogen-containing substituent; q, r and s are independently in each occurence the integers 0, 1, 2, or 3; with the proviso that the sum of q, r and s is greater than or equal to 2; t is independently in each occurrence an integer of between about 0 and 4 inclusive; and x is a number between about 0 and 5 inclusive.
Claim 3
Dependent Claim
83 words
The composition of claim 1 wherein: Ar is a benzene, napthalene, phenanthracene, anthracene, or biaromatic radicals, or two or more aromatic radicals bridged by alkylene moieties; B is ##STR14## D is an alkyl, alkenyl, alkynyl, aryl, alkaryl, aralkyl, halo, alkoxy, nitro, carboxylate, sulfone, sulfide, or carbonate moiety; D 1 is C 1-5 alkyl; Y is ##STR15## q, r and s are independently 1 or 2; t is independently 0, 1 or 2; and x is a number between about 0 and 2 inclusive.
Claim 4
Dependent Claim
52 words
The composition of claim 2 wherein: Ar is a benzene, biphenyl, binaphthyl or diphenylalkylene radical; B is ##STR16## D is a C 1-10 alkyl, C 1-10 alkenyl, nitro or halo moiety; q, r and s are 1; t is 0 or 1; and x is a number between 0 and 1 inclusive.
Claim 5
Dependent Claim
29 words
The composition of claim 3 wherein: Ar is benzene; B is ##STR17## D is a C 1-3 alkyl, C 1-3 alkenyl, bromo or chloro moiety; and t is 0.
Claim 6
Dependent Claim
9 words
The composition of claim 4 wherein: B is ##STR18##
Claim 7
Dependent Claim
22 words
The composition of which corresponds to the formula ##STR19## wherein x is a real number of between about 0 and 5, inclusive.
Claim 8
Dependent Claim
22 words
The composition of which corresponds to the formula ##STR19## wherein x is a real number of between about 0 and 5, inclusive.
Claim 9
Dependent Claim
18 words
The composition of claim 6 wherein x is a real number of between about 0 and 2, inclusive.
Claim 10
Dependent Claim
18 words
The composition of claim 6 wherein x is a real number of between about 0 and 1, inclusive.
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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) | 1991-06-14 | 1991-12-14 | 1992-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-14 | 1995-12-14 | 1996-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-14 | 1999-12-14 | 2000-06-14 | $7700.00 | Window Closed / Lapsed |