Patent US4377652A successfully refreshed from Google Patents.
US4377652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide-imide compositions and articles for electrical use prepared therefrom
Assignee: Asahi Kasei Corp
•
Filing: 1979-02-08
•
Granted: 1983-03-22
•
Expires: 1999-02-08
Abstract
Abstract An article for electrical use such as insulative substrates, electrical circuit borads and electrical elements, wholly or partly consisting out of an aromatic polyamide-imide having a reduced viscosity of from about 0.3 to 1.5, which polyamide-imide may contain a granular material dispersed therein, and a composition comprising 100 parts by weight of said polyamide-imide and additional about 100 to 4,000 parts by weight of a granular material and optionally about 10 to 10,000 parts by weight of a polar organic solvent.
Inventors
- 👤 Kaoru Ohmura
- 👤 Ichiro Shibasaki
- 👤 Takeo Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:28
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/303; H01B3/306; C; C08; C08K; C08K3/00; C08K3/02; C08K3/08; C08K3/10; C08K5/00; C08K5/54; H01B3/305; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/0346
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
170 words
An article for electrical use, comprising (a) an aromatic polyamide-imide having a reduced viscosity of from about 0.3 to 1.5 and repeating units for the formula, ##STR72## wherein Ar is a divalent residue represented by the formula, ##STR73## Ar' is a divalent residue represented by the formula, ##STR74## Ar" is a divalent residue represented by the formula, ##STR75## and Ar'" is a divalent residue represented by the formula, ##STR76## wherein R moieties may be the same or different and represent a hydrogen atom, a halogen atom or an alkyl group having 1 to 4 carbon atoms; X is an oxygen atom, a sulfur atom, a sulfonyl group, a carbonyl group, a carbonyloxy group, a methylene group, an ethylene group or a dimethylmethylene group; and (b) about 1 to 40 times the weight of (a) of at least one granular material uniformly dispersed therein selected from the group consisting of metals, metal oxides, metal nitrides, metal carbides, metal silicides, silicon, silicon oxides, silicon nitrides, silicon carbide, boron, boron nitrides and carbon.
Claim 2
Dependent Claim
170 words
An article for electrical use, comprising (a) an aromatic polyamide-imide having a reduced viscosity of from about 0.3 to 1.5 and repeating units for the formula, ##STR72## wherein Ar is a divalent residue represented by the formula, ##STR73## Ar' is a divalent residue represented by the formula, ##STR74## Ar" is a divalent residue represented by the formula, ##STR75## and Ar'" is a divalent residue represented by the formula, ##STR76## wherein R moieties may be the same or different and represent a hydrogen atom, a halogen atom or an alkyl group having 1 to 4 carbon atoms; X is an oxygen atom, a sulfur atom, a sulfonyl group, a carbonyl group, a carbonyloxy group, a methylene group, an ethylene group or a dimethylmethylene group; and (b) about 1 to 40 times the weight of (a) of at least one granular material uniformly dispersed therein selected from the group consisting of metals, metal oxides, metal nitrides, metal carbides, metal silicides, silicon, silicon oxides, silicon nitrides, silicon carbide, boron, boron nitrides and carbon.
Claim 3
Dependent Claim
48 words
The article of claim 1, wherein Ar in the formula of the aromatic polyamide-imide is ##STR77## wherein R is a hydrogen atom or a methyl group; and X is an oxygen atom, a sulfur atom, a sulfonyl group, a carbonyl group, a methylene group or an ethylene group.
Claim 4
Dependent Claim
16 words
The article of claim 1, wherein Ar in the formula of the aromatic polyamide-imide is ##STR78##
Claim 5
Dependent Claim
19 words
The article of claim 1, wherein the aromatic polyamide-imide has a reduced viscosity of from about 0.4 to 1.3.
Claim 6
Dependent Claim
31 words
The article of claim 1, wherein the granular material is at least one member selected from the group consisting of Au, Ag, Pd, Pt, Cu, Ni, Al, Sn and alloys thereof.
Claim 7
Dependent Claim
94 words
The article of claim 1, wherein the granular material is at least one member selected from the group consisting of Ag--PdO, Ag--PdO--Pd, NiO 2 --Ag, C--B--Ag, Ag--PdO--Sb 2 O 3 , C--B, Cu 2 O--CuO, In 2 O 3 , In 2 O 3 --Sb 2 O 3 , Tl 2 O 3 , SnO 2 , SnO 2 --Sb 2 O 3 , SnO 2 --Ta 2 O 5 , MoO 3 --B, ZnO, CdO--ZnO, RuO 2 , TaN, TiN, TiN--Ti, TaN--Ta, WC, WC--W, C, CoSi, ZrSi, TaSi, MnSi, MoSi, NiSi and TiSi.
Claim 8
Dependent Claim
61 words
The article of claim 1, wherein the granular material is at least one member selected from the group consisting of SiO, SiO 2 , Si 3 N 4 , SiC, Ta 2 O 3 , Al 2 O 3 , TiO 2 , BaTiO 3 , BN, BeO, CoO, PdO, B 2 O 3 , Bi 2 O 3 and BaO.
Claim 9
Dependent Claim
31 words
The article of claim 1, wherein the polyamide-imide additionally comprises about 2 to 100 parts by weight, based on 100 parts by weight of the aromatic polyamide-imide, of an epoxy resin.
Claim 10
Dependent Claim
26 words
The article of claim 1, wherein the epoxy resin is a compound of the formula ##STR79## wherein m 1 is a number of 0 to 20.
Claim 11
Dependent Claim
26 words
The article of claim 1, wherein the epoxy resin is a compound of the formula, ##STR80## wherein m 2 is a number of 0 to 5.
Claim 12
Dependent Claim
32 words
The article of claim 1, wherein the polyamide-imide additionally comprises about 2 to 60 parts by weight based on 100 parts by weight of the aromatic polyamide-imide, of a silane coupling agent.
Claim 13
Dependent Claim
93 words
A composition comprising 100 parts by weight of an aromatic polyamide-imide soluble in a polar organic solvent and having a reduced viscosity of from about 0.3 to 1.5 and repeating units of the formula, ##STR81## wherein Ar, Ar', Ar" and Ar'" are the same as defined in claim 1, and about 100 to 4,000 parts by weight of at least one granular material uniformly dispersed therein selected from the group consisting of metals, metal oxides, metal nitrides, metal carbides, metal silicides, silicon, silicon oxides, silicon nitrides, silicon carbide, boron, boron nitrides and carbon.
Claim 14
Dependent Claim
32 words
A composition of claim 12 comprising additionally about 10 to 10,000 parts by weight of at least one solvent selected from the group consisting of N,N-dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide, N-methyl-2-pyrrolidone and hexamethylphosphoramide.
Claim 15
Dependent Claim
19 words
The composition of claim 13, wherein the solvent comprises at least about 5% by weight of N-methyl-2-pyrrolidone or hexamethylphosphoramide.
Claim 16
Dependent Claim
20 words
The composition of claim 13, wherein the amount of the solvent ranges from about 20 to 200 parts by weight.
Claim 17
Dependent Claim
48 words
The composition of claim 12, wherein Ar in the formula of the aromatic polyamide-imide is ##STR82## wherein R is a hydrogen atom or a methyl group; and X is an oxygen atom, a sulfur atom, a sulfonyl group, a carbonyl group, a methylene group or an ethylene group.
Claim 18
Dependent Claim
16 words
The composition of claim 12, wherein Ar in the formula of the aromatic polyamide-imide is ##STR83##
Claim 19
Dependent Claim
19 words
The composition of claim 12, wherein the aromatic polyamide-imide has a reduced viscosity of from about 0.4 to 1.3.
Claim 20
Dependent Claim
41 words
The composition of claim 12, wherein the granular material is at least one member selected from the group consisting of metals, metal oxides, metal nitrides, metal carbides, metal silicides, silicon, silicon oxides, silicon nitrides, silicon carbide, boron, boron nitrides and carbon.
Claim 21
Dependent Claim
31 words
The composition of claim 12, wherein the granular material is at least one member selected from the group consisting of Au, Ag, Pd, Pt, Cu, Ni, Al, Sn and alloys thereof.
Claim 22
Dependent Claim
93 words
The composition of claim 12, wherein the granular material is at least one member selected from the group consisting of Ag--PdO, Ag--PdO--Pd, NiO 2 --Ag, C--B--Ag, Ag--PdO--Sb 2 O 3 , C--B, Cu 2 O--CuO, In 2 O 3 , In 2 O 3 --Sb 2 O 3 , Tl 2 O 3 , SnO 2 , SnO 2 --Sb 2 O 3 , SnO 2--Ta 2 O 5 , MoO 3 B, ZnO, CdO--ZnO, RuO 2 , TaN, TiN, TiN--Ti, TaN--Ta, WC, WC--W, C, CoSi, ZrSi, TaSi, MnSi, MoSi, NiSi and TiSi.
Claim 23
Dependent Claim
62 words
The composition of claim 12, wherein the granular material is at least one member selected from the group consisting of SiO, SiO 2 , Si 3 N 4 , SiC, Ta 2 O 3 , Al 2 O 3 , TiO 2 , BaTiO 3 , BN, BeO, CoO, PdO, B 2 O 3 , Bi 2 O 3 , and BaO.
Claim 24
Dependent Claim
29 words
The composition of claim 12, which additionally comprises about 2 to 100 parts by weight, based on 100 parts by weight of the aromatic polyamide-imide, of an epoxy resin.
Claim 25
Dependent Claim
26 words
The composition of claim 12, wherein the epoxy resin is a compound of the formula, ##STR84## wherein m 1 is a number of 0 to 20.
Claim 26
Dependent Claim
26 words
The composition of claim 12, wherein the epoxy resin is a compound of the formula, ##STR85## wherein m 2 is a number of 0 to 5.
Claim 27
Dependent Claim
30 words
The composition of claim 12, which additionally comprises about 2 to 60 parts by weight, based on 100 parts by weight of the aromatic polyamide-imide, of a silane coupling agent.
References Cited (Backward Citations)
US3513134A
Cited
US3472815A
Cited
US3817942A
Cited
US3753998A
Cited
US3975345A
Cited
US3860559A
Cited
US4066631A
Cited
US4167620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |