Patent US4067847A successfully refreshed from Google Patents.
US4067847A
Expired / Lapsed
US
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Self-extinguishing resin composition
Assignee: Mitsubishi Chemical Corp
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Filing: 1975-10-17
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Granted: 1978-01-10
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Expires: 1995-10-17
Abstract
Abstract A self-extinguishing resin composition comprises 55 - 25 wt. % of a thermoplastic resin and 45 - 75 wt. % of magnesium hydroxide, wherein said magnesium hydroxide has a specific surface area of less than or equal to 45 m2/g. Such a composition is not subject to formation of a silver-colored streak upon being extrusion- or injection-molded.
Inventors
- 👤 Hiroshi Yui
- 👤 Saburo Moriwaki
- 👤 Yukihiro Ichikawa
- 👤 Shigekazu Ohi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:06
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/29; H01B7/295; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C09; C09C; C09C1/00; C09C1/02; C09C1/028; C01; C01P; C01P2006/00; C01P2006/12; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
228 words
A self-extinguishing resin composition which prevents the formation of a silver-colored streak when extrusion-molded or injection-molded which comprises: 5- 25 wt. % of a thermoplastic resin and 45 - 75 wt. % of magnesium hydroxide, wherein when said resin is extrusion-molded, the specific surface area of magnesium hydroxide is selected within the ranges of 38 - 45 m 2 /g when said resin has a melt index of more than 8 g/10 minutes; 40 - 33 m 2 /g when said resin has a melt index of 8 - 4 g/10 minutes; 36 - 28 m 2 /g when said resin has a melt index of 4 - 1 g/10 minutes; and 35 - 25 m 2 /g when said resin has a melt index of 1 - 0.1 g/10 minutes; and wherein, when said resin is injection-molded, the specific surface area of magnesium hydroxide is selected from the ranges of 30 - 22 m 2 /g when said resin has a melt index of more than 10 g/10 minutes; 25 - 18 m 2 /g when said resin has a melt index of 10 - 6 g/10 minutes; 22 - 10 m 2 /g when said resin has a melt index of 6 - 3 g/10 minutes; and less than 20 m 2 /g when said resin has a melt index of 3 - 1 g/10 minutes.
Claim 2
Dependent Claim
228 words
A self-extinguishing resin composition which prevents the formation of a silver-colored streak when extrusion-molded or injection-molded which comprises: 5- 25 wt. % of a thermoplastic resin and 45 - 75 wt. % of magnesium hydroxide, wherein when said resin is extrusion-molded, the specific surface area of magnesium hydroxide is selected within the ranges of 38 - 45 m 2 /g when said resin has a melt index of more than 8 g/10 minutes; 40 - 33 m 2 /g when said resin has a melt index of 8 - 4 g/10 minutes; 36 - 28 m 2 /g when said resin has a melt index of 4 - 1 g/10 minutes; and 35 - 25 m 2 /g when said resin has a melt index of 1 - 0.1 g/10 minutes; and wherein, when said resin is injection-molded, the specific surface area of magnesium hydroxide is selected from the ranges of 30 - 22 m 2 /g when said resin has a melt index of more than 10 g/10 minutes; 25 - 18 m 2 /g when said resin has a melt index of 10 - 6 g/10 minutes; 22 - 10 m 2 /g when said resin has a melt index of 6 - 3 g/10 minutes; and less than 20 m 2 /g when said resin has a melt index of 3 - 1 g/10 minutes.
Claim 3
Dependent Claim
14 words
The self-extinguishing resin composition of claim 1, wherein said thermoplastic resin is a polyolefin.
Claim 4
Dependent Claim
18 words
The self-extinguishing resin composition of claim 1, wherein said thermoplastic resin is polypropylene, propylene-ethylene copolymer or high-density polyethylene.
Claim 5
Dependent Claim
54 words
The self-extinguishing resin composition of claim 1, wherein 0.05 - 20 wt. parts of a fine carbon powder having an average particle size diameter of 1mμm - 10μm is blended for each 100 wt. parts of the total of the thermoplastic resin and magnesium hydroxide thereby improving the flame retarding property of the composition.
Claim 6
Dependent Claim
42 words
The self-extinguishing resin composition of claim 4, wherein the range of the fine carbon powder having an average particle size diameter of 1mμm - 10μm is 0.10 - 5 wt. parts for each 100 wt. parts of the total of the composition.
Claim 7
Dependent Claim
19 words
A process of extrusion molding a thermoplastic resin composition wherein the self-extinguishing resin composition of claim 1 is used.
Claim 8
Dependent Claim
19 words
A process of injection molding a thermoplastic resin composition wherein the self-extinguishing resin composition of claim 1 is used.
References Cited (Backward Citations)
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US3816367A
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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) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |