US4145227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous dispersion aid for thermoplastics
Assignee: Honeywell International Inc
•
Filing: 1976-11-12
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Granted: 1979-03-20
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Expires: 1996-11-12
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
2026-11-04 23:15
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/203; C08J5/00; C08K; C08K7/00; C08K7/02; C08L; C08L101/00; C08K2201/00; C08K2201/016
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
50 words
A filler premix for use in thermoplastic molding compositions consisting essentially of 82-93.3% particulate filler and 0.7-18% fibrous dispersion effecting material selected from the group consisting of glass fiber, aluminum whiskers, and silicon carbide fiber having an aspect ratio at least about ten times the aspect ratio of the filler.
Claim 2
Dependent Claim
50 words
A filler premix for use in thermoplastic molding compositions consisting essentially of 82-93.3% particulate filler and 0.7-18% fibrous dispersion effecting material selected from the group consisting of glass fiber, aluminum whiskers, and silicon carbide fiber having an aspect ratio at least about ten times the aspect ratio of the filler.
Claim 3
Dependent Claim
40 words
The premix composition of claim 1 wherein said fibrous dispersion effecting material is of sufficient length before said composition is blended with a thermoplastic resin such that the length of said material is less than about 1/8 inch after blending.
Claim 4
Dependent Claim
15 words
The premix composition of claim 2 wherein said fibrous dispersion effecting material is glass fiber.
Claim 5
Dependent Claim
15 words
The premix composition of claim 2 wherein said fibrous dispersion effecting material is alumina whisker.
Claim 6
Dependent Claim
27 words
The premix composition of claim 2 wherein said filler is selected from the group consisting of minerals, metals, metal oxides, siliceous materials, metal salts and mixtures thereof.
Claim 7
Dependent Claim
11 words
The premix composition of claim 5 wherein said filler is kaolin.
Claim 8
Dependent Claim
12 words
The premix composition of claim 5 wherein said filler is calcium carbonate.
Claim 9
Dependent Claim
11 words
The premix composition of claim 5 wherein said filler is silica.
Claim 10
Dependent Claim
11 words
The premix composition of claim 5 wherein said filler is talc.
Claim 11
Dependent Claim
21 words
The premix composition of claim 2 wherein said filler has an average particle size of from about 0.5 to 10 microns.
References Cited (Backward Citations)
US2902379A
Cited
US3732177A
Cited
GB1361322A
Cited
US3951906A
Cited
US3958041A
Cited
GB1504188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |