US4015039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous dispersion aid for thermoplastics
Assignee: Honeywell International Inc
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Filing: 1975-09-02
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Granted: 1977-03-29
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Expires: 1995-09-02
Abstract
Abstract The addition to filled thermoplastic resin systems of small amounts of fibrous material, of aspect ratio at least about 10 times the aspect ratio of the filler, facilitates dispersion and processing of these filled compositions into shaped articles and gives a product exhibiting superior surface properties.
Inventors
- 👤 Leon Segal
- 👤 Albert H. Steinberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:44
CPC Classifications
C; C08; C08J; C08J5/00; C08J3/00; C08J3/20; C08J3/203; C08K; C08K7/00; C08K7/02; C08L; C08L101/00; C08K2201/00; C08K2201/016; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/25; Y10T428/252; Y10T428/26; Y10T428/266; Y10T442/00; Y10T442/60; Y10T442/659; Y10T442/674
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
89 words
A filled thermoplastic resin sheet formable by stamping under heat and pressure into shaped objects wherein the sheet is a laminate comprising: a. at least one layer of a filled thermoplastic composition comprising 15-80% filler and, as a dispersion effecting aid, 0.5-15% fibrous material having an aspect ratio at least about 10 times the aspect ratio of the filler and having a length of less than about 1/8 inch; and b. at least one layer of glass mat formed of fiber lengths of at least 1.5 inches in length.
Claim 2
Dependent Claim
89 words
A filled thermoplastic resin sheet formable by stamping under heat and pressure into shaped objects wherein the sheet is a laminate comprising: a. at least one layer of a filled thermoplastic composition comprising 15-80% filler and, as a dispersion effecting aid, 0.5-15% fibrous material having an aspect ratio at least about 10 times the aspect ratio of the filler and having a length of less than about 1/8 inch; and b. at least one layer of glass mat formed of fiber lengths of at least 1.5 inches in length.
Claim 3
Dependent Claim
12 words
The sheet of claim 1 wherein said layer (a) comprises 25-50% filler.
Claim 4
Dependent Claim
17 words
The sheet of claim 1 wherein a single layer of (b) is between two layers of (a).
Claim 5
Dependent Claim
12 words
The sheet of claim 1 wherein said thermoplastic polymer is nylon 6.
Claim 6
Dependent Claim
12 words
The sheet of claim 1 wherein said thermoplastic polymer is polyethylene terephthalate.
Claim 7
Dependent Claim
12 words
The sheet of claim 1 wherein said thermoplastic polymer is polybutylene terephthalate.
Claim 8
Dependent Claim
25 words
The sheet of claim 1 wherein said fibrous material of layer (a) is present in an amount of 1-5% by weight of the total mixture.
Claim 9
Dependent Claim
12 words
The sheet of claim 1 wherein said fibrous material is glass fiber.
Claim 10
Dependent Claim
11 words
The sheet of claim 1 wherein said fibrous material is alumina.
Claim 11
Dependent Claim
14 words
The sheet of claim 1 wherein said fibrous material is a synthetic polymeric material.
Claim 12
Dependent Claim
26 words
The sheet of claim 1 wherein said fibrous material and/or filler are coated with processing agents in amounts less than 2% of the total inorganic material.
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) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |