US4379882A
Expired / Lapsed
US
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Halogen-containing polyolefin composition, and method for inactivating halogens therein
Assignee: Kyowa Chemical Industry Co Ltd
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Filing: 1981-11-10
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Granted: 1983-04-12
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Expires: 2001-11-10
Abstract
Abstract A polyolefin composition consisting essentially of (a) 100 parts by weight of a polyolefin containing halogens derived from a polymerization catalyst and/or attributed to the after-halogenation of the polymer, and (b) about 0.001 to about 10 parts by weight of an aluminum-magnesium hydroxide represented by the following formula Mg1-xAlx(OH)2+x.mH2O (1) wherein x is a positive number represented by 0<x</=0.5 and m is a positive number represented by 0</=m<2, and having a BET specific surface area of no more than about 40 m2/g; and a method for inactivating the halogen in a halogen-containing polyolefin.
Inventors
- 👤 Shigeo Miyata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:29
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
A polyolefin composition consisting essentially of (a) 100 parts by weight of a polyolefin containing halogens derived from a polymerization catalyst and/or attributed to the after-halogenation of the polymer, and (b) about 0.001 to about 10 parts by weight of an aluminum-magnesium hydroxide represented by the following formula Mg.sub.1-x Al.sub.x (OH).sub.2+x.mH.sub.2 O (1) wherein x is a positive number represented by 0<x≦0.5 and m is a positive number represented by 0≦m<2, and having a BET specific surface area of no more than about 40 m 2 /g.
Claim 2
Dependent Claim
87 words
A polyolefin composition consisting essentially of (a) 100 parts by weight of a polyolefin containing halogens derived from a polymerization catalyst and/or attributed to the after-halogenation of the polymer, and (b) about 0.001 to about 10 parts by weight of an aluminum-magnesium hydroxide represented by the following formula Mg.sub.1-x Al.sub.x (OH).sub.2+x.mH.sub.2 O (1) wherein x is a positive number represented by 0<x≦0.5 and m is a positive number represented by 0≦m<2, and having a BET specific surface area of no more than about 40 m 2 /g.
Claim 3
Dependent Claim
38 words
The composition of claim 1 wherein the aluminum-magnesium hydroxide is surface-treated with about 1 to about 10 parts by weight, per 100 parts by weight of the hydroxide, of an alkali metal salt of a higher fatty acid.
Claim 4
Dependent Claim
22 words
The composition of claim 1 wherein the aluminum-magnesium hydroxide has an average second-order particle diameter of not more than about 5 microns.
Claim 5
Dependent Claim
26 words
The composition of claim 2 wherein the alkali metal salt of a higher fatty acid is an alkali metal salt of stearic acid or oleic acid.
Claim 6
Dependent Claim
57 words
The composition of claim 1 wherein said polyolefin is a member selected from the group consisting of polymers or copolymers of C 2 -C 8 olefins, copolymers of at least one C 2 -C 8 olefin with a diene, polymers or copolymers of C 4 -C 8 dienes, and the after-halogenated products of said polymers or copolymers.
Claim 7
Independent Claim
92 words
A method for inactivating the halogen in a halogen-containing polyolefin, which comprises mixing 100 parts by weight of a polyolefin containing halogens derived from a polymerization catalyst and/or attributed to after-halogenation of the polymer with about 0.001 to about 10 parts by weight of an aluminum-magnesium hydroxide of the following formula Mg.sub.1-x Al.sub.x (OH).sub.2+x.mH.sub.2 O (1) wherein x is a positive number represented by 0<x≦0.5 and m is a positive number represented by 0≦m<2, said aluminum-magnesium hydroxide having a BET specific surface area of not more than about 40 m 2 /g.
Claim 8
Independent Claim
92 words
A method for inactivating the halogen in a halogen-containing polyolefin, which comprises mixing 100 parts by weight of a polyolefin containing halogens derived from a polymerization catalyst and/or attributed to after-halogenation of the polymer with about 0.001 to about 10 parts by weight of an aluminum-magnesium hydroxide of the following formula Mg.sub.1-x Al.sub.x (OH).sub.2+x.mH.sub.2 O (1) wherein x is a positive number represented by 0<x≦0.5 and m is a positive number represented by 0≦m<2, said aluminum-magnesium hydroxide having a BET specific surface area of not more than about 40 m 2 /g.
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) | 1986-04-11 | 1986-10-11 | 1987-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-11 | 1990-10-11 | 1991-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-11 | 1994-10-11 | 1995-04-12 | $7700.00 | Window Closed / Lapsed |