US4587318A
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Ethylene copolymer compositions for rotational molding
Assignee: Eneos Corp
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Filing: 1985-01-24
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Granted: 1986-05-06
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Expires: 2005-01-24
Abstract
Abstract Provided is an ethylene copolymer composition for rotational molding, comprising a copolymer of a predominant ethylene and 0.02 to 1 mole % of a non-conjugated diene represented by the following formula (I) or (II) or a derivative thereof: <IMAGE> (I) <IMAGE> (II) wherein R1 is an alkylene group having one or two carbon atoms and R2 is hydrogen or an alkyl group having one or two carbon atoms, and an organic peroxide, said copolymer having a melt index of 2 to 50 g/10 min, a density of 0.930 to 0.970 g/cm3 and a maximum peak temperature (Tm) measured according to Differential Scanning Calorimetry (DSC) of not lower than 100 DEG C.
Inventors
- 👤 Takashi Inoue
- 👤 Mituji Miyoshi
- 👤 Kazuo Matsuura
- 👤 Kaoru Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:21
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/16; C08F210/18; C08K; C08K5/00; C08K5/04; C08K5/14; C08F210/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
110 words
An ethylene copolymer composition for rotational molding, comprising a copolymer of ethylene, 0-3 mole % of an α-olefin and 0.02 to 1% of a non-conjugated diene represented by the following formula (I) or (II) or a derivative thereof: ##STR3## wherein R 1 is an alkylene group having one or two carbon atoms and R 2 is hydrogen or an alkyl group having one or two carbon atoms, and an organic peroxide, said copolymer having a melt index of 2 to 50 g/10 min, a density of 0.930 to 0.970 g/cm 3 and a maximum peak temperature (Tm) measured according to Differential Scanning Calorimetry (DSC) of not lower than 100° C.
Claim 2
Dependent Claim
110 words
An ethylene copolymer composition for rotational molding, comprising a copolymer of ethylene, 0-3 mole % of an α-olefin and 0.02 to 1% of a non-conjugated diene represented by the following formula (I) or (II) or a derivative thereof: ##STR3## wherein R 1 is an alkylene group having one or two carbon atoms and R 2 is hydrogen or an alkyl group having one or two carbon atoms, and an organic peroxide, said copolymer having a melt index of 2 to 50 g/10 min, a density of 0.930 to 0.970 g/cm 3 and a maximum peak temperature (Tm) measured according to Differential Scanning Calorimetry (DSC) of not lower than 100° C.
Claim 3
Dependent Claim
18 words
An ethylene copolymer composition for rotational molding as claimed in claim 1, wherein said non-conjugated diene is 5-vinyl-2-norbornene.
Claim 4
Dependent Claim
22 words
An ethylene copolymer composition for rotational molding as claimed in claim 1, wherein said α-olefin is a C 3 -C 10 α-olefin.
Claim 5
Dependent Claim
36 words
An ethylene copolymer composition for rotational molding as claimed in claim 1, wherein said organic peroxide is used in an amount of 0.1 to 5 parts by weight per 100 parts by weight of said copolymer.
Claim 6
Dependent Claim
30 words
A process for producing a shaped article, characterized by charging a powder of the composition of claim 1 into a mold for rotational molding and then performing a rotational molding.
Claim 7
Dependent Claim
25 words
An ethlylene copolymer composition for rotational molding as claimed in claim 1, wherein the amount of said nonconjugated diene is 0.05 to 1.0 mole %.
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) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |