US4581158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conductive thermosetting compositions and process for using same
Assignee: WR Grace and Co Conn
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Filing: 1984-09-26
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Granted: 1986-04-08
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Expires: 2004-09-26
Abstract
Abstract This invention is directed to a process and a novel composition for forming a conductive thermoset material which comprises admixing (a) particles of a polymeric material swellable at its plasticization temperature, (b) at least one liquid reactive plasticizer for (a) (c) optionally and preferably a curing agent for the reactive plasticizer, and (d) heat or electrically conductive particles, and thereafter heating the admixture for a time sufficient to flux and cure same to obtain a conductive thermoset material. Upon heating, above the plasticization temperature, the liquid reactive plasticizer plasticizes the polymer particles. This results in the swelling of the polymer particle, forcing the conductive filler to pack tightly and orderly, thereby increasing the conductivity of the plasticized conductive thermoset after curing.
Inventors
- 👤 Shiow C. Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:46
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0073; H05K9/0081; H05K9/0083; C; C08; C08G; C08G59/00; C08G59/18; C08K; C08K3/00; C08K3/02; C08K3/08
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
75 words
A conductive, thermosettable, reactive plastisol dispersion composition comprising an admixture of (a) particles of a non-crosslinked, polymeric material swellable at its plasticization temperature, (b) at least one liquid, reactive plasticizer for (a), and (c) particles of a heat or electrically conductive material, the weight ratio of (a):(b) being 0.0001:99.9999 to 70:30 with (c) being present in an amount in the range 1 to 80% by weight of the total conductive, thermosetable, reactive plastisol dispersion composition.
Claim 2
Dependent Claim
75 words
A conductive, thermosettable, reactive plastisol dispersion composition comprising an admixture of (a) particles of a non-crosslinked, polymeric material swellable at its plasticization temperature, (b) at least one liquid, reactive plasticizer for (a), and (c) particles of a heat or electrically conductive material, the weight ratio of (a):(b) being 0.0001:99.9999 to 70:30 with (c) being present in an amount in the range 1 to 80% by weight of the total conductive, thermosetable, reactive plastisol dispersion composition.
Claim 3
Dependent Claim
14 words
The composition of claim 1 containing in addition a thermal curing agent for (b).
Claim 4
Dependent Claim
13 words
The composition of claim 1 wherein the polymeric material is an epoxy resin.
Claim 5
Dependent Claim
14 words
The composition of claim 1 wherein the polymeric material is an isobutene-maleic anhydride copolymer.
Claim 6
Dependent Claim
14 words
The composition of claim 1 wherein the polymeric material is a styrene-maleic anhydride copolymer.
Claim 7
Dependent Claim
13 words
The composition of claim 2 wherein the polymeric material is an epoxy resin.
Claim 8
Dependent Claim
14 words
The composition of claim 2 wherein the polymeric material is an isobutene-maleic anhydride copolymer.
Claim 9
Dependent Claim
14 words
The composition of claim 2 wherein the polymer material is a styrene-maleic anhydride copolymer.
Claim 10
Independent Claim
101 words
The method of making a conductive thermoset article comprising the steps of admixing (a) particles of a non-crosslinked, polymeric material swellable at its plasticization temperature, (b) at least one liquid reactive plasticizer for (a), and (c) particles of a heat or electrically conductive material to form a conductive reactive plastisol composition, the weight ratio of (a):(b) being 0.0001:99.9999 to 70:30 with (c) being present in an amount in the range 1 to 80% by weight of the conductive, reactive plastisol composition and, thereafter, heating the composition for a time sufficient to plasticize and cure same to obtain a conductive thermoset article.
Claim 11
Independent Claim
101 words
The method of making a conductive thermoset article comprising the steps of admixing (a) particles of a non-crosslinked, polymeric material swellable at its plasticization temperature, (b) at least one liquid reactive plasticizer for (a), and (c) particles of a heat or electrically conductive material to form a conductive reactive plastisol composition, the weight ratio of (a):(b) being 0.0001:99.9999 to 70:30 with (c) being present in an amount in the range 1 to 80% by weight of the conductive, reactive plastisol composition and, thereafter, heating the composition for a time sufficient to plasticize and cure same to obtain a conductive thermoset article.
Claim 12
Dependent Claim
17 words
The method according to claim 9 wherein the admixture also contains a thermal curing agent for (b).
Claim 13
Dependent Claim
14 words
A method according to claim 9 wherein the polymeric material is an epoxy resin
Claim 14
Dependent Claim
15 words
A method according to claim 9 wherein the polymeric material is an isobutene-maleic anhydride copolymer.
Claim 15
Dependent Claim
15 words
A method according to claim 9 wherein the polymeric material is a styrene-maleic anhydride copolymer.
Claim 16
Dependent Claim
13 words
The composition of claim 10 wherein the polymeric material is an epoxy resin.
Claim 17
Dependent Claim
14 words
The composition of claim 10 wherein the polymeric material is an isobutene-maleic anhydride copolymer.
Claim 18
Dependent Claim
14 words
The composition of claim 10 wherein the polymeric material is a styrene-maleic anhydride copolymer.
Claim 19
Dependent Claim
12 words
The composition of claim 1 as a conductive coating on a substrate.
Claim 20
Dependent Claim
12 words
The composition of claim 2 as a conductive coating on a substrate.
Claim 21
Dependent Claim
12 words
The composition of claim 1 as a conductive adhesive between two substrates.
Claim 22
Dependent Claim
12 words
The composition of claim 2 as a conductive adhesive between two substrates.
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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) | 1989-04-07 | 1989-10-07 | 1990-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-07 | 1993-10-07 | 1994-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-07 | 1997-10-07 | 1998-04-08 | $7700.00 | Window Closed / Lapsed |