US5397611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandable films and molded products therefrom
Assignee: Henkel Loctite Corp
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Filing: 1993-08-10
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Granted: 1995-03-14
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Expires: 2013-08-10
Abstract
Abstract A thin, tacky, non-pourable film of incompatible in situ-expandable thermoplastic particles and thermosettable matrix resin that contains an essentially uniform density and thickness across the breadth of the film. The in situ-expandable mass is not pourable yet can be easily dispensed in a uniform manner within a mold and thereafter expanded to the dimensions of the mold. Composites and reinforced compositions, as well as methods of molding, are disclosed.
Inventors
- 👤 Raymond S. Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:15
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0085; B; B29; B29B; B29B15/00; B29B15/08; B29B15/10; B29B15/12; B29B15/122; B29C; B29C43/00; B29C43/22; B29C43/24; B29C43/28; B29C44/00; B29C44/34; B29C44/36; B29C44/38; B29C70/00; B29C70/02; B29C70/021; B29C70/025; B29C70/04; B29C70/28; B29C70/40; B29C70/50; B29C70/504; B29C70/58; B29C70/62; B29C70/66; C08J9/32; B29K; B29K2101/00; B29K2101/12; B29K2105/00; B29K2105/04; B29K2105/06; B29K2105/12; B29K2105/16; B29K2105/165; C08J2363/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/1359; Y10T428/1362; Y10T428/1366; Y10T428/1369; Y10T428/1372; Y10T428/1376; Y10T428/1386; Y10T428/139; Y10T428/1393; Y10T428/249921; Y10T428/249953; Y10T428/249954; Y10T428/249962; Y10T428/249971; Y10T428/249972; Y10T428/249981; Y10T428/249986; Y10T428/249987; Y10T428/249991; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/164; Y10T442/172; Y10T442/174; Y10T442/184; Y10T442/195; Y10T442/198; Y10T442/60; Y10T442/699
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
98 words
A tacky and drapable, non-pourable film having a uniform thickness, that contains (i) a non-pourable thermosetting matrix resin system and (ii) particles of a microcellular in situ-expandable thermoplastic polymer containing an expansion agent therein in which both (i) and (ii) are uniformly distributed throughout the film, so that upon expansion of the thermoplastic polymer into microcells in the non-pourable film, the resulting film is a thermoset thin film syntactic foam the thickness of which is about 1.01 to about 4 times greater than the non-expanded film, which film is composited with at least one layer of another material.
Claim 2
Dependent Claim
98 words
A tacky and drapable, non-pourable film having a uniform thickness, that contains (i) a non-pourable thermosetting matrix resin system and (ii) particles of a microcellular in situ-expandable thermoplastic polymer containing an expansion agent therein in which both (i) and (ii) are uniformly distributed throughout the film, so that upon expansion of the thermoplastic polymer into microcells in the non-pourable film, the resulting film is a thermoset thin film syntactic foam the thickness of which is about 1.01 to about 4 times greater than the non-expanded film, which film is composited with at least one layer of another material.
Claim 3
Dependent Claim
27 words
The thin and drapable, in situ-expandable tacky film of claim 1 wherein the other material strengthens the film prior to expansion and conversion to the thermoset state.
Claim 4
Dependent Claim
20 words
The thin and drapable, in situ-expandable tacky film of claim 2 wherein the other material is calendared to the film.
Claim 5
Dependent Claim
23 words
The thin and drapable, in situ-expandable tacky film of claim 3 wherein the other layer of material comprises scrims, foils and plastic films.
Claim 6
Dependent Claim
18 words
The thin and drapable, in situ-expandable tacky film of claim 3 wherein the other material sandwiches the film.
Claim 7
Dependent Claim
29 words
The thin and drapable, in situ-expandable tacky film of claim 3 wherein the bond of the film to the other material is effected through the tackiness of the film.
Claim 8
Dependent Claim
18 words
The thin and drapable, in situ-expandable tacky film of claim 3 wherein the material is an open scrim.
Claim 9
Dependent Claim
26 words
The thin and drapable, in situ-expandable tacky film of claim 3 wherein the open scrim is one or more of a woven, nonwoven or knitted scrim.
Claim 10
Dependent Claim
38 words
The thin and drapable, in situ-expandable tacky film of claim 1 wherein the film is composited with an uncured syntactic foam that comprises thin films of uniform thickness which contain rigid microballoons uniformly dispersed in a resin matrix.
Claim 11
Dependent Claim
25 words
The thin and drapable, in situ-expandable tacky film of claim 9 wherein the resin matrix in the film and the uncured syntactic foam are cocurable.
Claim 12
Dependent Claim
26 words
The thin and drapable, in situ-expandable tacky film of claim 1 wherein the thin and drapable, tacky film is composited with a layer of a prepreg.
Claim 13
Dependent Claim
36 words
The film of claim 1 scrolled into a small diameter tube about which is adhered one or more prepreg layers containing carbon fiber reinforcement to form a composite tube containing a small hole in the center.
References Cited (Backward Citations)
US5234757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-03-13 | 1998-09-12 | 1999-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-13 | 2002-09-12 | 2003-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-13 | 2006-09-12 | 2007-03-14 | $7700.00 | Window Closed / Lapsed |