Patent US1512943A successfully refreshed from Google Patents.
Patent US4207373A successfully refreshed from Google Patents.
US4207373A
Expired / Lapsed
US
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Highly filled polyolefin compositions
Assignee: Honeywell International Inc
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Filing: 1974-11-25
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Granted: 1980-06-10
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Expires: 1994-11-25
Abstract
Abstract A highly filled, mechanically strong and impact resistant composition is prepared by combining about 25-80% polyolefin with about 10-60% rigid inorganic particulate filler of aspect ratio less than 15, thoroughly blending using high shear equipment until the flexural modulus is at least 1.25 times that of the base polyolefin and subsequently incorporating therein, using low or non-shear techniques, about 10-45% fibrous reinforcement of length at least 11/2 inches.
Inventors
- 👤 Leon Segal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:59
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/003; B32; B32B; B32B27/00; B32B27/12; B32B27/18; B32B27/20; B32B27/32; C; C08; C08K; C08K13/00; C08K13/04; B29K; B29K2309/00; B29K2309/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
90 words
A method for producing a highly filled impact resistant polymeric laminate comprising: (a) combining about 25-80% by weight based on the weight of the total system of a polyolefin with about 10-60% by weight rigid inorganic particulate filler of aspect ratio less than 15, (b) thoroughly blending, using high shear equipment, the mixture of (a) until the flexural modulus is at least 1.25 times that of the base polyolefin, and (c) laminating with the filled polyolefin of (a), about 10-45% by weight fiber reinforcement of length at least 11/2 inches.
Claim 2
Independent Claim
90 words
A method for producing a highly filled impact resistant polymeric laminate comprising: (a) combining about 25-80% by weight based on the weight of the total system of a polyolefin with about 10-60% by weight rigid inorganic particulate filler of aspect ratio less than 15, (b) thoroughly blending, using high shear equipment, the mixture of (a) until the flexural modulus is at least 1.25 times that of the base polyolefin, and (c) laminating with the filled polyolefin of (a), about 10-45% by weight fiber reinforcement of length at least 11/2 inches.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein the polyolefin and filler are blended in an extruder prior to incorporation of the fibers.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein the composition comprises, by weight, about 40 to 70% polyolefin, about 25-40% filler and about 15-40% fibrous reinforcement.
Claim 5
Dependent Claim
32 words
The method of claim 1 wherein the polyolefin and filler are mixed with an organo-silane coupling agent and a cross-linking agent under conditions which can provide a free radical to the mixture.
Claim 6
Dependent Claim
72 words
An impact resistant polymeric laminate, capable of being formed into molded parts, comprising about 25-80% by weight polyolefin, about 10-60% rigid inorganic particulate filler of aspect ratio less than 15 and about 10-45% fiber reinforcement of length at least 11/2 inches, in which the filler and polymer as compounded in the melt have a flexural modulus at least 1.25 times that of the base polyolefin prior to introduction of the fiber reinforcement.
Claim 7
Dependent Claim
72 words
An impact resistant polymeric laminate, capable of being formed into molded parts, comprising about 25-80% by weight polyolefin, about 10-60% rigid inorganic particulate filler of aspect ratio less than 15 and about 10-45% fiber reinforcement of length at least 11/2 inches, in which the filler and polymer as compounded in the melt have a flexural modulus at least 1.25 times that of the base polyolefin prior to introduction of the fiber reinforcement.
Claim 8
Dependent Claim
17 words
The laminate of claim 5 comprising about 40-70% polyolefin, about 25-40% filler and about 15-40% fibrous reinforcement.
Claim 9
Dependent Claim
10 words
The laminate of claim 6 wherein the polyolefin is polypropylene.
Claim 10
Dependent Claim
24 words
The laminate of claim 7 wherein the rigid inorganic filler is selected from the groups of filler consisting of asbestos, talc, clay, and silica.
Claim 11
Dependent Claim
11 words
The laminate of claim 8 wherein the filler is microcrystalline novaculite.
Claim 12
Dependent Claim
13 words
The laminate of claim 9 wherein the fibrous reinforcement consists of glass fibers.
Claim 13
Dependent Claim
40 words
The method of claim 1 including the additional steps of softening said laminate by heat, immediately thereafter charging said heat-softened laminate into a matched mold, pressing said laminate into a molded part and removing the molded part from said mold.
Claim 14
Dependent Claim
10 words
A molded part formed from the laminate of claim 8.
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) | 1983-06-10 | 1983-12-10 | 1984-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-10 | 1987-12-10 | 1988-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-10 | 1991-12-10 | 1992-06-10 | $7700.00 | Window Closed / Lapsed |