US4491553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing filler-loaded thermoplastic resin composite
Assignee: Lion Corp
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Filing: 1982-06-25
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Granted: 1985-01-01
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Expires: 2002-06-25
Abstract
Abstract The invention provides an improved method for producing a filler-loaded thermoplastic resin composite by mixing a thermoplastic resin with a filler, making it possible to be applied to molding machine such as extrusion and injection molding machines without the disadvantage of segregation between the resin and the filler otherwise inevitable leading to inferior uniformity of the shaped articles. The invention is characterized by the presence of a fibrillatable polytetrafluoroethylene during the mixing under mechanical shearing forces, wherein the thermoplastic resin is melted in one case and not melted in other case. The invention is also effective for shaping cellular foamed bodies of a filler-loaded thermoplastic resin with fine and uniform cellular structure.
Inventors
- 👤 Hisashi Yamada
- 👤 Masayuki Makise
- 👤 Tsutomu Katagiri
- 👤 Kaname Abe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:34
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J3/00; C08J3/20; C08J3/203; C08J9/0066; C08K; C08K3/00; C08K3/01; C08K3/013; C08L; C08L101/00; B; B29; B29K; B29K2105/00; B29K2105/04; C08J2427/00; C08L27/00; C08L27/02; C08L27/12; C08L27/18
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
121 words
A method for producing a filler-loaded thermoplastic resin composite with very uniformly dispersed filler, which comprises as components (a) from about 20 to 80 parts by weights of a thermoplastic resin, (b) from about 80 to 20 parts by weight of a filler and (c) a fibrillatable polytetrafluoroethylene in an amount of from 0.01 to 5% by weight based on the total of the resin and the filler, comprising the steps of fibrillating the polytetrafluoroethylene by sufficiently mixing the components in particulate form under shearing forces, to form a substantially dehydrated easy-collapsing agglomerate of the components captured in the entanglement of the fibrils of the polytetrafluoroethylene, and then continuing mixing at a temperature higher than the gelation temperature of the resin.
Claim 2
Independent Claim
121 words
A method for producing a filler-loaded thermoplastic resin composite with very uniformly dispersed filler, which comprises as components (a) from about 20 to 80 parts by weights of a thermoplastic resin, (b) from about 80 to 20 parts by weight of a filler and (c) a fibrillatable polytetrafluoroethylene in an amount of from 0.01 to 5% by weight based on the total of the resin and the filler, comprising the steps of fibrillating the polytetrafluoroethylene by sufficiently mixing the components in particulate form under shearing forces, to form a substantially dehydrated easy-collapsing agglomerate of the components captured in the entanglement of the fibrils of the polytetrafluoroethylene, and then continuing mixing at a temperature higher than the gelation temperature of the resin.
Claim 3
Independent Claim
134 words
A method for producing a shaped article of filler-loaded thermoplastic resin composite which comprises (a) from about 20 to 80 parts by weight of a thermoplastic resin, (b) from about 80 to 20 parts by weight of filler and (c) a fibrillatable polytetrafluoroethylene in an amount of from 0.01 to 5% by weight based on the total of the resin and the filler, comprising the steps of fibrillating the polytetrafluoroethylene by sufficiently mixing the components in particulate form under shearing forces to form a substantially dehydrated easy-collapsing agglomerate of the components captured in the entanglement of the fibrils of the polytetrafluoroethylene, then continuing mixing the agglomerate at a temperature higher than the gelation temperature of the resin to form a uniform mixture of melted filler-loaded resin and shaping the melted filler-loaded thermoplastic resin composite.
Claim 4
Independent Claim
134 words
A method for producing a shaped article of filler-loaded thermoplastic resin composite which comprises (a) from about 20 to 80 parts by weight of a thermoplastic resin, (b) from about 80 to 20 parts by weight of filler and (c) a fibrillatable polytetrafluoroethylene in an amount of from 0.01 to 5% by weight based on the total of the resin and the filler, comprising the steps of fibrillating the polytetrafluoroethylene by sufficiently mixing the components in particulate form under shearing forces to form a substantially dehydrated easy-collapsing agglomerate of the components captured in the entanglement of the fibrils of the polytetrafluoroethylene, then continuing mixing the agglomerate at a temperature higher than the gelation temperature of the resin to form a uniform mixture of melted filler-loaded resin and shaping the melted filler-loaded thermoplastic resin composite.
Claim 5
Dependent Claim
43 words
The method of claim 1 or 2, wherein the thermoplastic resin is selected from the group consisting of polyolefin resins, polystyrenes, polyvinyl chloride resins, polyvinylidene chloride resins, polymethyl methacrylate resins, ABS resins, synthetic rubbers, polyamide resins, polyester resins, polycarbonate resins and the like.
Claim 6
Dependent Claim
45 words
The method of claim 1 or 2, wherein the filler is selected from the group consisting of silica fillers, magnesium carbonate, calcium carbonate, talc, mica powders, kaolin, diatomaceous earth, aluminum hydroxide, calcium sulfate, barium sulfate, calcium sulfite, wood flour, coconut shell flour and the like.
Claim 7
Dependent Claim
10 words
The method of claim 2, wherein the shaping comprises pelletizing.
Claim 8
Dependent Claim
11 words
The method of claim 2, wherein the shaping comprises extrusion molding.
Claim 9
Dependent Claim
10 words
The method of claim 2, wherein the shaping comprises calendering.
Claim 10
Dependent Claim
11 words
The method of claim 2, wherein the shaping comprises injection molding.
Claim 11
Dependent Claim
11 words
The method of claim 2, wherein the shaping comprises blow molding.
Claim 12
Dependent Claim
11 words
The method of claim 2, wherein the shaping comprises press molding.
Claim 13
Dependent Claim
24 words
The method of claim 2, wherein the filler-loaded thermoplastic resin composite contains an effective amount of a foaming agent and optionally a crosslinking agent.
Claim 14
Dependent Claim
29 words
The method of claim 11, wherein the resin composite is shaped to form a plate or sheet and subjected to expansion with heating to form a cellular foamed body.
Claim 15
Dependent Claim
19 words
The method of claim 11 wherein the filler-loaded thermoplastic resin composite contains an effective amount of a crosslinking agent.
Claim 16
Dependent Claim
35 words
The method of claim 1 or claim 2, wherein the fibrillatable polytetrafluoroethylene is used in an amount of from 0.1 to 2% by weight based on the total amount of the resin and the filler.
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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) | 1988-01-01 | 1988-07-02 | 1989-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-01 | 1992-07-02 | 1993-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-01 | 1996-07-02 | 1997-01-01 | $7700.00 | Window Closed / Lapsed |