Patent US4032683A successfully refreshed from Google Patents.
US4032683A
Expired / Lapsed
US
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Structural member and method of making same
Assignee: Phillips Petroleum Co
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Filing: 1976-09-27
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Granted: 1977-06-28
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Expires: 1996-09-27
Abstract
Abstract A structural member is provided which is heat resistant and is formed from a mixture of poly(phenylene sulfide) resin and a filler with the structural member being comprised of an inner core formed from the poly(phenylene sulfide) and filler with the inner core having a cellular structure. The inner core is coated with poly(phenylene sulfide) which is fused and cured to provide additional strength for the member and to seal the porous inner core. Preferably, the structural member is of a honeycomb type having a plurality of voids to further lighten the member. Laminate members can be bonded or otherwise secured to the member to form a laminate type structure. The inner core portion of the structural member is made by molding the mixture and curing same to a predetermined degree of cure, after which the core portion is coated with a coating of poly(phenylene sulfide) which is then fused and cured.
Inventors
- 👤 Harold D. Coale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:06
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/58; C08J9/04; C08J9/12; E; E04; E04C; E04C2/00; E04C2/02; E04C2/26; E04C2/284; C08J2381/00; C08J2381/02; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S264/06; Y10S264/17; Y10S264/83; Y10T; Y10T428/00; Y10T428/23; Y10T428/233; Y10T428/24; Y10T428/24149; Y10T428/24273; Y10T428/24322
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
70 words
A heat resistant article of reinforced plastic comprising: (a) a structural member comprised of cellular poly(phenylene sulfide) and at least one reinforcing filler with said poly(phenylene sulfide) being at least partially cured and is in an amount of at least about 20 weight percent of the member; and (b) a coating on said member, said coating is at least partially comprised of poly(phenylene sulfide) and is at least partially cured.
Claim 2
Dependent Claim
70 words
A heat resistant article of reinforced plastic comprising: (a) a structural member comprised of cellular poly(phenylene sulfide) and at least one reinforcing filler with said poly(phenylene sulfide) being at least partially cured and is in an amount of at least about 20 weight percent of the member; and (b) a coating on said member, said coating is at least partially comprised of poly(phenylene sulfide) and is at least partially cured.
Claim 3
Dependent Claim
29 words
The article as set forth in claim 1 wherein: (a) said member has a plurality of through bores defined by surfaces, said bore defining surfaces have said coating thereon.
Claim 4
Dependent Claim
17 words
The article as set forth in claim 2 wherein: (a) said filler includes a heat resistant filler.
Claim 5
Dependent Claim
23 words
The article as set forth in claim 3 wherein: (a) said heat resistant filler includes at least one of fiber glass and asbestos.
Claim 6
Dependent Claim
32 words
The article as set forth in claim 1 wherein: (a) said member is cellular with the cellular portion, exclusive of the filler, having a density of between about 0.05 to 0.1 grams/cc.
Claim 7
Dependent Claim
22 words
The article as set forth in claim 5 including: (a) a laminate member bonded to at least one surface of said member.
Claim 8
Independent Claim
80 words
A method of making a heat resistant article of reinforced plastic comprising: (a) forming a mixture of poly(phenylene sulfide), at least one reinforcing filler and a foaming agent; (b) molding said mixture into a desired shape in a mold to form a cellular structural member; (c) at least partially curing said mixture during molding; (d) removing said member from the mold; (e) coating said member with a coating comprised of poly(phenylene sulfide): and (f) at least partially curing said coating.
Claim 9
Independent Claim
80 words
A method of making a heat resistant article of reinforced plastic comprising: (a) forming a mixture of poly(phenylene sulfide), at least one reinforcing filler and a foaming agent; (b) molding said mixture into a desired shape in a mold to form a cellular structural member; (c) at least partially curing said mixture during molding; (d) removing said member from the mold; (e) coating said member with a coating comprised of poly(phenylene sulfide): and (f) at least partially curing said coating.
Claim 10
Dependent Claim
41 words
The method as set forth in claim 7 wherein: (a) said mixture contains a foaming agent whereby said member is cellular after curing with the density of the cellular portion, exclusive of the filler, being between about 0.05 to 1.0 grams/cc.
Claim 11
Dependent Claim
26 words
The method as set forth in claim 8 including: (a) at least partially post-curing said member after removing same from the mold and before coating same.
Claim 12
Dependent Claim
41 words
The method as set forth in claim 8 wherein: 8(a) said reinforcing filler including at least one of fiber glass and asbestos and said poly(phenylene sulfide) is in an amount of at least about 20 percent by weight of the member.
Claim 13
Dependent Claim
36 words
The method as set forth in claim 10 including: (a) forming a plurality of holes in said member during molding; and (b) coating surfaces defining said holes with poly(phenylene sulfide) during the coating of the member.
Claim 14
Dependent Claim
18 words
The method as set forth in claim 11 wherein: (a) said coating is coated on the member electrostatically.
Claim 15
Dependent Claim
64 words
The method as set forth in claim 12 wherein: (a) said curing during molding is at a temperature of at least about 700° F. for a time sufficient to effect foaming and to make the member sufficiently rigid to remove same from the mold; (b) said member is substantially completely cured after molding and before coating; and (c) said coating is substantially completely cured.
Claim 16
Dependent Claim
23 words
The method as set forth in claim 8 including: (a) bonding a laminate member to at least one surface of the coated member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |