US4831095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel ethylene copolymer and process for producing said copolymer
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1988-01-19
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Granted: 1989-05-16
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Expires: 2008-01-19
Abstract
Abstract A novel ethylene copolymer and a process for producing said copolymer are disclosed. This ethylene copolymer contains from 40 to 95% by weight of ethylene, from 60 to 5% by weight of at least one dialkylaminoalkyl acrylamide comonomer represented by formula (A): ##STR1## wherein the symbols are as defined in the appended claims, and 0 to 20% by weight of at least one ethylenically unsaturated comonomer, and has a number average molecular weight of from 5,000 to 50,000.
Inventors
- 👤 Tadayuki Ohmae
- 👤 Kentaro Mashita
- 👤 Noboru Yamaguchi
- 👤 Kouichiro Asao
- 👤 Hisao Tanaka
- 👤 Tadashi Sakurai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:22
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44; C08F210/00; C08F210/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
170 words
An ethylene copolymer comprising from 40 to 95% by weight of ethylene, from 60 to 5% by weight of at least one dialkylaminoalkyl acrylamide comonomer represented by formula (A): ##STR5## wherein R 1 is a hydrogen atom or a methyl group; R 2 and R 3 are each an alkyl group having from 1 to 4 carbon atoms; and n is an integer of from 2 to 5, and from 0 to 20% by weight of at least one ethylenically unsaturated comonomer, and having a number average molecular weight of from 5,000 to 50,000, which is produced by a process comprising copolymerizing from 40 to 99% by weight of ethylene, from 60 to 1% by weight of at least one dialkylaminoalkyl acrylamide comonomer represented by formula (A) and from 0 to 20% by weight of at least one ethylenically unsaturated comonomer in the presence of a radical polymerization initiator under conditions of polymerization pressure of from 500 to 3,000 kg/cm 2 and polymerization temperature of from 100° to 300° C.
Claim 2
Dependent Claim
170 words
An ethylene copolymer comprising from 40 to 95% by weight of ethylene, from 60 to 5% by weight of at least one dialkylaminoalkyl acrylamide comonomer represented by formula (A): ##STR5## wherein R 1 is a hydrogen atom or a methyl group; R 2 and R 3 are each an alkyl group having from 1 to 4 carbon atoms; and n is an integer of from 2 to 5, and from 0 to 20% by weight of at least one ethylenically unsaturated comonomer, and having a number average molecular weight of from 5,000 to 50,000, which is produced by a process comprising copolymerizing from 40 to 99% by weight of ethylene, from 60 to 1% by weight of at least one dialkylaminoalkyl acrylamide comonomer represented by formula (A) and from 0 to 20% by weight of at least one ethylenically unsaturated comonomer in the presence of a radical polymerization initiator under conditions of polymerization pressure of from 500 to 3,000 kg/cm 2 and polymerization temperature of from 100° to 300° C.
Claim 3
Dependent Claim
27 words
An ethylene copolymer as claimed in claim 1, wherein the dialkylaminoalkyl acrylamide comonomer is at least one of dimethylaminopropyl acrylamide, dimethylaminopropyl methacrylamide, dimethylaminoethyl acrylamide and dimethylaminoethyl methacrylamide.
Claim 4
Dependent Claim
31 words
An ethylene copolymer as claimed in claim 1, wherein the ethylenically unsaturated comonomer is at least one of methyl acrylate, ethyl acrylate, methyl methacrylate, vinyl acetate, dimethylaminoethyl methacrylate and dimethylaminoethyl acrylate.
Claim 5
Dependent Claim
16 words
An ethylene copolymer as claimed in claim 2, wherein the dialkylaminoalkyl acrylamide comonomer is dimethylaminopropyl acrylamide.
Claim 6
Dependent Claim
44 words
An ethylene copolymer as claimed in claim 4, wherein when the content of the dimethylaminopropyl acrylamide comonomer is expressed by M (mol %), the melting point (Tm) and the crystallization temperature (Tc) of the copolymer are in the following relation: Tm=3.3(M)+113 (°C.) Tc=4.1(M)+97 (°C.).
References Cited (Backward Citations)
JPS60229904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |