US4904760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting resin composition from cyanate ester and non-branched aromatic compound
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1988-04-26
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Granted: 1990-02-27
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Expires: 2008-04-26
Abstract
Abstract A thermosetting resin composition polyfunctional cyanate ester resin composition comprising: (I) a cyanate ester compound selected from the group consisting of a polyfunctional cyanate ester having at least two cyanate esters in its molecule, a prepolymer of such a cyanate ester and mixtures thereof; and (II) at least one non-branched aromatic compound in an amount of 5-40% by weight of the total resin composition, said aromatic compound having a number-average molecular weight of 178-800, an average number of aromatic nuclei of 2-6, and a boiling point of more than 300° C., and in which the portion having aromatic nuclei of 2-6 constitutes more than 50% is disclosed.
Inventors
- 👤 Morio Gaku
- 👤 Hidenori Kimbara
- 👤 Mitsuo Eziri
- 👤 Masakazu Motegi
- 👤 Yousuke Funamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:55
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G73/0622; C08G73/0638; C08G73/065; C08G73/0655
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
103 words
A thermosetting resin composition comprising: (I) a cyanate ester compound selected from the group consisting of a polyfunctional cyanate ester having at least two cyanato ester groups, a prepolymer of such a cyanate ester and mixtures thereof, characterized in that said composition contains (II) at least one non-branched aromatic compound in an amount of 5-40% by weight of the total resin composition, said aromatic compound having a number-average molecular weight of 178-800, an average number of aromatic nuclei of 2-6, and a boiling point of more than 300° C., and in which the portion having aromatic nuclei of 2-6 constitutes more than 50%.
Claim 2
Dependent Claim
103 words
A thermosetting resin composition comprising: (I) a cyanate ester compound selected from the group consisting of a polyfunctional cyanate ester having at least two cyanato ester groups, a prepolymer of such a cyanate ester and mixtures thereof, characterized in that said composition contains (II) at least one non-branched aromatic compound in an amount of 5-40% by weight of the total resin composition, said aromatic compound having a number-average molecular weight of 178-800, an average number of aromatic nuclei of 2-6, and a boiling point of more than 300° C., and in which the portion having aromatic nuclei of 2-6 constitutes more than 50%.
Claim 3
Dependent Claim
24 words
The composition of claim 1 wherein the portion comprising the aromatic compound having aromatic nuclei of 2-6 constitutes more than 60% of the composition.
Claim 4
Dependent Claim
23 words
The composition of claim 1 wherein said aromatic compound (II) is used in an amount of 5-35% weight of the total resin composition.
Claim 5
Dependent Claim
239 words
The composition of claim 1 wherein said aromatic compound (II) is selected from the group consisting of (i) compounds having the formula: ##STR5## wherein each of R 1 and R 3 is independently --CHRCH 2 --, >CRCH 3 , >C═CH 2 , --CR═CH-- or ##STR6## R 2 is >CR--CH 2 -- wherein R is hydrogen or methyl; X is halogen, alkyl having carbon atoms of 1-3 or alkoxy having carbon atoms of 1-3; m is 0.5-3; and p, q and r are independently 0 or an integer of 1-5; (ii) compounds having the formula: ##STR7## wherein A and B are the same or different, and A and B are independently replaced by a single bond, or A and B are independently --0--, lower alkylene having carbon atoms of 1-3, --CH 2 O--, --CH 2 OCH 2 -- or --CH 2 OCH 2 OCH 2 --; R is the same or different, and is independently halogen, lower alkyl having carbon atoms of 1-3, lower alkoxy having carbon atoms of 1-3, or --CH 2 OH; m is 0 or an integer of 1-3; p and r are independently 0 or an integer of 1-5; and q is 0 or an integer of 1-4; (iii) a coumarone-indene resin having a softening point of 60°-120° C. or aromatic petroleum resin; (iv) aromatic compounds selected from the group consisting of anthracene, phenanthrene and lower alkyl or bromo-substituted anthracene or phenanthrene; and (v) mixtures thereof.
Claim 6
Dependent Claim
16 words
The composition of claim 4 wherein said aromatic compound is a compound having the formula (1).
Claim 7
Dependent Claim
24 words
The composition of claim 5 wherein said compound is styrene oligomer and the amount of unsaturated double bond is less than 0.2 per molecule.
Claim 8
Dependent Claim
16 words
The composition of claim 4 wherein said aromatic compound is a compound having the formula (2).
Claim 9
Dependent Claim
26 words
The composition of claim 7 wherein said compound is selected from the group consisting of polybromodiphenyl ether, diphenyl benzene, phenyl xylyl ethane and aromatic hydrocarbon resins.
Claim 10
Dependent Claim
13 words
The composition of claim 8 wherein said compound is an aromatic hydrocarbon resin.
Claim 11
Dependent Claim
17 words
The composition of claim 9 wherein said aromatic hydrocarbon resin is substantially free from any functional group.
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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) | 1993-02-26 | 1993-08-28 | 1994-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-26 | 1997-08-28 | 1998-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-26 | 2001-08-28 | 2002-02-27 | $7700.00 | Window Closed / Lapsed |