US4239803A
Expired / Lapsed
US
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Ethylene polymer composition
Assignee: Adeka Corp
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Filing: 1977-06-14
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Granted: 1980-12-16
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Expires: 1997-06-14
Abstract
Abstract A composition for enhancing and maintaining mechanical properties such as tensile strength of an ethylene polymer on heating at elevated temperature comprises (A) an initiator of cross-linking having a half-life measured at 110° C. of 0.1 to 50 hours and (B) an alkylthioalkylenecarboxylic acid ester of a polycarbocyclic polyhydric phenol.
Inventors
- 👤 Toshio Ohzeki
- 👤 Mitsuo Akutsu
- 👤 Yutaka Nakahara
- 👤 Tohru Haruna
- 👤 Motonobu Minagawa
- 👤 Masahiro Nonoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:35
CPC Classifications
C; C07; C07C; C07C323/00; C08; C08K; C08K5/00; C08K5/04; C08K5/14; C08K5/36; C08K5/37; C08K5/375; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
155 words
An ester of an alkylthioalkylenecarboxylic acid with a polycarbocyclic polyhydric phenol having the formula: ##STR29## in which R is an alkyl group having from 1 to 32 carbon atoms, A is a residue of a polycarbocyclic phenol having 2 to 4 benzene rings each substituted with one phenolic hydroxyl group and connected through oxygen, sulfur, --CH 2 S--CH 2 --, or saturated aliphatic hydrocarbon cycloaliphatic hydrocarbon, or hydroxyaryl-substituted aliphatic hydrocarbon groups, R' is an alkylene, phenylene, alkenylene, alkylenethioalkylene, alkylenedithioalkylene, or alkylenethioalkylenethioalkylene group having up to 12 carbon atoms, m is 0 or 1, n is an integer from 1 to 5, a is an integer from 1 to 4, b, c, d, and e are integers from 0 to 3, provided that the sum of a, b, and c is an integer from 2 to 4, and when c is not zero, the sum of d and e is an integer from 1 to 3.
Claim 2
Dependent Claim
155 words
An ester of an alkylthioalkylenecarboxylic acid with a polycarbocyclic polyhydric phenol having the formula: ##STR29## in which R is an alkyl group having from 1 to 32 carbon atoms, A is a residue of a polycarbocyclic phenol having 2 to 4 benzene rings each substituted with one phenolic hydroxyl group and connected through oxygen, sulfur, --CH 2 S--CH 2 --, or saturated aliphatic hydrocarbon cycloaliphatic hydrocarbon, or hydroxyaryl-substituted aliphatic hydrocarbon groups, R' is an alkylene, phenylene, alkenylene, alkylenethioalkylene, alkylenedithioalkylene, or alkylenethioalkylenethioalkylene group having up to 12 carbon atoms, m is 0 or 1, n is an integer from 1 to 5, a is an integer from 1 to 4, b, c, d, and e are integers from 0 to 3, provided that the sum of a, b, and c is an integer from 2 to 4, and when c is not zero, the sum of d and e is an integer from 1 to 3.
Claim 3
Dependent Claim
9 words
An ester according to claim 1 in which n=2.
Claim 4
Dependent Claim
9 words
An ester according to claim 1 in which a=2.
Claim 5
Dependent Claim
9 words
An ester according to claim 1 in which a=1.
Claim 6
Dependent Claim
9 words
An ester according to claim 1 in which a=3.
Claim 7
Dependent Claim
14 words
An ester according to claim 1 in which the phenol is a thiobis (alkylphenol).
Claim 8
Dependent Claim
14 words
An ester according to claim 1 in which the phenol is an alkylidenebis (alkylphenol).
Claim 9
Dependent Claim
14 words
An ester according to claim 1 in which the phenol is an alkyl-substituted trisphenol.
Claim 10
Dependent Claim
10 words
an ester according to claim 1 having the formula: ##STR30##
Claim 11
Dependent Claim
73 words
A composition capable of enhancing the tensile strength of an ethylene polymer upon heating at 150° C. comprising (A) at least one organic peroxide or organic azo compound initiator of cross-linking having a half-life measured at 110° C. in the range from 0.1 to 100 hours and (B) at least one ester according to claim 1, in which the portions of (A) to (B) range from 100 to 1 to 1 to 2.
Claim 12
Dependent Claim
16 words
A composition according to claim 10 in which the initiator of cross-linking is an organic peroxide.
Claim 13
Dependent Claim
14 words
A composition according to claim 11 in which the organic peroxide is bis(2-phenyl-2-propyl) peroxide.
Claim 14
Dependent Claim
17 words
A composition according to claim 10 in which the initiator of cross-linking is an organic azo compound.
Claim 15
Dependent Claim
14 words
A composition according to claim 13 in which the organic azo compound is azodicarbonamide.
Claim 16
Dependent Claim
103 words
An ethylene polymer composition having, as a result of cross-linking in the presence of at least one organic peroxide or organic azo compound initiator of cross-linking having a half-life measured at 110° C. in the range from 0.1 to 100 hours, a tensile strength of at least 130 kg/cm 2 , comprising an ethylene polymer which is low density polyethylene, high density polyethylene, or a copolymer of at least 75% ethylene with not more than 25% of at least one co-monomer which is propylene, 1-butene, 1-hexene, vinyl acetate, or ethylene acrylate, and from 0.01 to 2% of an ester according to claim 1.
Claim 17
Dependent Claim
17 words
An ethylene polymer composition according to claim 15 in which the ethylene polymer is low density polyethylene.
Claim 18
Dependent Claim
21 words
An ethylene polymer composition according to claim 15 in which the ethylene polymer is a copolymer of ethylene and vinyl acetate.
Claim 19
Dependent Claim
18 words
An ethylene polymer composition according to claim 15 in the form of insulation on a conductor of electricity.
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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) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |