US4585701A
Expired / Lapsed
US
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Composites of polyvinylidene fluoride alloys and thermoplastic polymers and their preparation
Assignee: Arkema Inc
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Filing: 1984-02-15
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Granted: 1986-04-29
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Expires: 2004-02-15
Abstract
Abstract Composites of polyvinylidene fluoride alloys, and incompatible thermoplastic polymers are prepared by two-layer coextrusion with recycling of scrap material.
Inventors
- 👤 Edward J. Bartoszek
- 👤 Steven F. Mones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:18
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B29; B29B; B29B17/00; B29C; B29C48/00; B29C48/03; B29C48/06; B29C48/07; B29C48/08; B29C48/09; B29C48/10; B29C48/12; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/30; B29C48/305; B29C48/307; B32B27/30; B32B27/304; B32B27/308; B29K; B29K2027/00; B29K2027/12; B29K2105/00; B29K2105/26; B32B2272/00; B32B2307/00; B32B2307/50; B32B2307/56; B32B2307/70; B32B2307/71; B32B2355/00; B32B2355/02; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31551; Y10T428/31573; Y10T428/3158; Y10T428/31587
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
44 words
A polymer composite comprising a protective layer comprising an alloy of polyvinylidene fluoride and an acrylate polymer which layer is directly bound to a substrate comprising a homogeneous mixture of a thermoplastic polymer which is incompatible with polyvinylidene fluoride and scrap polymer composite material.
Claim 2
Dependent Claim
44 words
A polymer composite comprising a protective layer comprising an alloy of polyvinylidene fluoride and an acrylate polymer which layer is directly bound to a substrate comprising a homogeneous mixture of a thermoplastic polymer which is incompatible with polyvinylidene fluoride and scrap polymer composite material.
Claim 3
Dependent Claim
14 words
The composite of claim 1 wherein said protective layer includes a ultraviolet absorbing compound.
Claim 4
Dependent Claim
14 words
The composite of claim 1 wherein said protective layer includes a ultraviolet screening pigment.
Claim 5
Dependent Claim
122 words
A process for forming a polymer composite comprising conveying in a conduit a first heat-plasticized stream which comprises a mixture of a thermoplastic polymer which is incompatible with polyvinylidene fluoride and previously formed scrap composite material from said process, joining to the surface of the first heat-plasticized stream within said conduit a second heat-plasticized stream comprising an alloy of polyvinylidene fluoride and an acrylate polymer, thereby forming a single stratified stream of heat-plasticized material conforming to the cross-section of the conduit, conveying the stratified stream to an extrusion die, passing the stratified stream of heat-plasticized material through the die, and cooling the stratified stream emerging from the die to form a solid polymer composite wherein the layers of the composite are coextensive.
Claim 6
Dependent Claim
122 words
A process for forming a polymer composite comprising conveying in a conduit a first heat-plasticized stream which comprises a mixture of a thermoplastic polymer which is incompatible with polyvinylidene fluoride and previously formed scrap composite material from said process, joining to the surface of the first heat-plasticized stream within said conduit a second heat-plasticized stream comprising an alloy of polyvinylidene fluoride and an acrylate polymer, thereby forming a single stratified stream of heat-plasticized material conforming to the cross-section of the conduit, conveying the stratified stream to an extrusion die, passing the stratified stream of heat-plasticized material through the die, and cooling the stratified stream emerging from the die to form a solid polymer composite wherein the layers of the composite are coextensive.
Claim 7
Dependent Claim
22 words
The process of claim 4 wherein said first stream contains from about 0.1 to about 50 percent by weight of scrap material.
Claim 8
Dependent Claim
11 words
The process of claim 4 wherein said thermoplastic polymer is polyvinylchloride.
Claim 9
Dependent Claim
11 words
The process of claim 4 wherein said thermoplastic polymer is polyacrylonitrile-butadiene-styrene.
Claim 10
Dependent Claim
20 words
The process of claim 4 wherein said alloy contains from about 20 to 50 percent by weight of acrylate polymer.
Claim 11
Dependent Claim
11 words
The process of claim 4 wherein said acrylate polymer is polymethylmethacrylate.
Claim 12
Dependent Claim
14 words
The process of claim 4 wherein said second stream includes an ultraviolet absorbing compound.
Claim 13
Dependent Claim
16 words
The process of claim 4 wherein said second stream includes a pigment which screens ultraviolet radiation.
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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) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |