US4585855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing curable resin composition from cyanate ester and maleimide/diamine reaction product
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1985-02-28
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Granted: 1986-04-29
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Expires: 2005-02-28
Abstract
Abstract A process for producing a curable resin liquid comprising: (a) at least one cyanate ester compound and (b) at least one polyfunctional maleimide compound, characterized in that the process comprises: (A) reacting at least one said maleimide compound with said diamine in the presence of a diluent at a temperature of 60°-200° C., the ratio of the maleimide group to the amine group being in the range of from 1:0.0015 to 1:0.3 to form a preliminary reaction product substantially free from amine group; and (B) mixing said preliminary reaction product with at least one cyanate ester compound ratio by weight of said preliminary reaction product to said cyanate ester compound is disclosed.
Inventors
- 👤 Morio Gaku
- 👤 Hidenori Kimbara
- 👤 Mitsuo Ejiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:49
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12; C08G73/121
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
173 words
A process for producing a curable resin liquid comprising: (a) at least one cyanate ester compound selected from the group consisting of: (i) polyfunctional aromatic cyanate ester monomers having the formula R--(O--C═N).sub.n wherein n is an interger of 2-10 and R is an aromatic organic group, the cyanate group bonded to an aromatic ring or said aromatic organic group, and (ii) homoprepolymer of (i), and (b) a preliminary reaction product of (1) a diamine and (2) at least one polyfunctional maleimide compounds, wherein the process comprises (A) reacting said at least one maleimide compound with said diamine in the presence of a diluent at a temperature of 60°-200° C., the ratio of the maleimide group to the amine group being in the range of from 1:0.0015 to 1:0.3 to form a preliminary reaction product substantially free from amine group; and (B) mixing said preliminary reaction product with at least one said cyanate ester compound in a weight ratio of said preliminary reaction product to said cyanate ester compound of about 90:10 to 1:99.
Claim 2
Dependent Claim
173 words
A process for producing a curable resin liquid comprising: (a) at least one cyanate ester compound selected from the group consisting of: (i) polyfunctional aromatic cyanate ester monomers having the formula R--(O--C═N).sub.n wherein n is an interger of 2-10 and R is an aromatic organic group, the cyanate group bonded to an aromatic ring or said aromatic organic group, and (ii) homoprepolymer of (i), and (b) a preliminary reaction product of (1) a diamine and (2) at least one polyfunctional maleimide compounds, wherein the process comprises (A) reacting said at least one maleimide compound with said diamine in the presence of a diluent at a temperature of 60°-200° C., the ratio of the maleimide group to the amine group being in the range of from 1:0.0015 to 1:0.3 to form a preliminary reaction product substantially free from amine group; and (B) mixing said preliminary reaction product with at least one said cyanate ester compound in a weight ratio of said preliminary reaction product to said cyanate ester compound of about 90:10 to 1:99.
Claim 3
Dependent Claim
25 words
The process of claim 1 wherein the ratio of the maleimide group to the amino group is in the range of from 1:0.008 to 1:0.25.
Claim 4
Dependent Claim
25 words
The process of claim 1 wherein the ratio of the maleimide group to the amine group is in the range of from 1:011 to 1:0.11.
Claim 5
Dependent Claim
27 words
The process of claim 1 wherein the ratio of said preliminary reaction product to said cyanate ester compound is in the range of from 35:65 to 80:20.
Claim 6
Dependent Claim
33 words
The process of claim 1 wherein said diamine is at least one diamine selected from the group consisting of aromatic diamines, aliphatic diamines, alicyclic diamine, alkylene-bis(4-aminobenzoate), 6-alkyl- or aryl-substituted guanamins, and mixtures thereof.
Claim 7
Dependent Claim
11 words
The process of claim 5 wherein said diamine is alkylene bis(4-aminobenzoate).
Claim 8
Dependent Claim
12 words
The process of claim 5 wherein said diamine is an aromatic diamine.
Claim 9
Dependent Claim
12 words
The process of claim 1 wherein said diluent is an organic solvent.
Claim 10
Dependent Claim
39 words
The process of claim 1 wherein said diluent is a reactive diluent which has at least one carbon-carbon double bond and does not substantially react with the diamine and the maleimide during reacting said maleimide compound with said diamine.
Claim 11
Dependent Claim
12 words
The process of claim 8 wherein said organic solvent is N,N-dimethyl formamide.
Claim 12
Dependent Claim
14 words
The process of claim 9 wherein said reactive diluent is trialkenyl isocyanurate or tris(2-acryloxy)isocyanurate.
References Cited (Backward Citations)
US4110364A
Cited
US4499245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |