US4288359A
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Epoxy imide compositions
Assignee: EIDP Inc
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Filing: 1979-04-05
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Granted: 1981-09-08
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Expires: 1999-04-05
Abstract
Abstract A composition useful for making circuit boards which is the reaction product of (a) an epoxy resin or an epoxy novolac resin and optionally, a brominated epoxy resin and (b) a bismaleimide; wherein the product of (a) and (b) is subsequently reacting with a curing agent such as a diamine of the formula H2N-R1-NH2 where R1 is an aromatic, aliphatic or cycloaliphatic group. The composition is used to impregnate a fibrous substrate of fiberglass, high temperature polyamides or graphite fibers which is laminated to a copper sheet; the resulting laminate is used to form a circuit boards that have good electrical and physical properties.
Inventors
- 👤 William F. Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:44
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4042; C08J; C08J5/00; C08J5/24; C08J5/241; C08J5/244; C08J5/249; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/40; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/0346; H05K1/0353; H05K1/0366; C08J2363/00; H05K2201/00; H05K2201/02; H05K2201/0275; H05K2201/0278; H05K2201/03; H05K2201/032; H05K2201/0323; Y; Y10; Y10T; Y10T442/00; Y10T442/60; Y10T442/659; Y10T442/67; Y10T442/671
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
143 words
A composition comprising 20-80% by weight of a reaction product and 20-80% of a nonamide solvent for the reaction product having a dispersion solubility parameter of 7.2-10.5, a polar solubility parameter of 3-9.5 and a hydrogen bonding solubility parameter of 0-5.5; wherein the reaction product consists essentially of (a) an epoxy resin of the formula ##STR14## wherein R is an alkylene group of 1-4 carbon atoms, n is a positive integer; and the resin having an epoxide equivalent of about 150-1000; and (b) a bismaleimide of the formula ##STR15## where R 1 is an aromatic, aliphatic or cycloaliphatic group and wherein (a) and (b) are reacted at 115°-135° C. for about 0.5-2 hours and subsequently contacting the product of (a) and (b) with (c) a diamine of the formula ##STR16## wherein the molar ratio of bismaleimide to diamine is about 0.6 to 0.8.
Claim 2
Dependent Claim
143 words
A composition comprising 20-80% by weight of a reaction product and 20-80% of a nonamide solvent for the reaction product having a dispersion solubility parameter of 7.2-10.5, a polar solubility parameter of 3-9.5 and a hydrogen bonding solubility parameter of 0-5.5; wherein the reaction product consists essentially of (a) an epoxy resin of the formula ##STR14## wherein R is an alkylene group of 1-4 carbon atoms, n is a positive integer; and the resin having an epoxide equivalent of about 150-1000; and (b) a bismaleimide of the formula ##STR15## where R 1 is an aromatic, aliphatic or cycloaliphatic group and wherein (a) and (b) are reacted at 115°-135° C. for about 0.5-2 hours and subsequently contacting the product of (a) and (b) with (c) a diamine of the formula ##STR16## wherein the molar ratio of bismaleimide to diamine is about 0.6 to 0.8.
Claim 3
Dependent Claim
35 words
The composition of claim 1 in which R 1 is an alkylene group having 1-6 carbon atoms, phenylene, cyclohexylene, ##STR17## where R 2 is an alkylene group having 1-4 carbon atoms, SO 2 or O.
Claim 4
Dependent Claim
10 words
The composition of claim 2 in which R is ##STR18##
Claim 5
Dependent Claim
13 words
The composition of claim 3 in which R 1 is an aromatic group.
Claim 6
Dependent Claim
11 words
The composition of claim 4 in which R 1 is ##STR19##
Claim 7
Dependent Claim
46 words
A process for forming the reaction product of claim 1 which comprises the following steps. (1) contacting the epoxy resin with the bismaleimide at about 115°-135° C. for about 0.5-2 hours to form a product and (2) adding the diamine to the product of Step 1.
Claim 8
Dependent Claim
134 words
A composition comprising 20-80% by weight of a reaction product and 20-80% of a nonamide solvent for the reaction product having a dispersion solubility parameter of 7.2-10, a polar solubility parameter 3-9.5 and a hydrogen bonding solubility parameter of 0-5.5; wherein the reaction product consists essentially of (a) an epoxy novolac resin of the formula ##STR20## where n is a positive integer and the resin has an epoxide equivalent of about 150-300 (b) a bismaleimide of the formula ##STR21## where R 1 is an aromatic, aliphatic or cycloaliphatic group and wherein (a) and (b) are reacted at about 115°-135° C. for about 0.5-2 hours and subsequently reacting the product of (a) and (b) with (c) a diamine of the formula ##STR22## wherein the molar ratio of bismaleimide to diamine is about 0.6 to 0.8.
Claim 9
Dependent Claim
134 words
A composition comprising 20-80% by weight of a reaction product and 20-80% of a nonamide solvent for the reaction product having a dispersion solubility parameter of 7.2-10, a polar solubility parameter 3-9.5 and a hydrogen bonding solubility parameter of 0-5.5; wherein the reaction product consists essentially of (a) an epoxy novolac resin of the formula ##STR20## where n is a positive integer and the resin has an epoxide equivalent of about 150-300 (b) a bismaleimide of the formula ##STR21## where R 1 is an aromatic, aliphatic or cycloaliphatic group and wherein (a) and (b) are reacted at about 115°-135° C. for about 0.5-2 hours and subsequently reacting the product of (a) and (b) with (c) a diamine of the formula ##STR22## wherein the molar ratio of bismaleimide to diamine is about 0.6 to 0.8.
Claim 10
Dependent Claim
35 words
The composition of claim 7 in which R 1 is an alkylene group having 1-6 carbon atoms, phenylene, cyclohexylene, ##STR23## where R 2 is an alkylene groups having 1-4 carbon atoms, SO 2 or O.
Claim 11
Dependent Claim
13 words
The composition of claim 8 in which R 1 is an aromatic group.
Claim 12
Dependent Claim
11 words
The composition of claim 9 in which R 1 is ##STR24##
Claim 13
Dependent Claim
46 words
A process for forming the reaction product of claim 7 which comprises the following steps (1) contacting the epoxy novolac resin with the bismaleimide at about 115°-135° for about 0.5-2 hours to form a product and (2) adding the diamine to the product of Step (1).
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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) | 1984-09-07 | 1985-03-09 | 1985-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-07 | 1989-03-09 | 1989-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-07 | 1993-03-09 | 1993-09-08 | $7700.00 | Window Closed / Lapsed |