Patent US4078017A successfully refreshed from Google Patents.
US4078017A
Expired / Lapsed
US
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Process for production of modified polypropylene
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1977-03-03
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Granted: 1978-03-07
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Expires: 1997-03-03
Abstract
Abstract A process for producing modified polypropylene comprising reacting polypropylene with a liquid rubber and maleic anhydride in a solvent in the presence of a radical generator.
Inventors
- 👤 Kikuo Nagatoshi
- 👤 Toshimichi Ito
- 👤 Atsunobu Sakoda
- 👤 Akio Inayoshi
- 👤 Noriki Fujimoto
- 👤 Hidehiko Kaji
- 👤 Hirozo Sugahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:30
CPC Classifications
C; C08; C08F; C08F291/00; C08F291/02; C08F255/00; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/14; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L23/26; C08L2312/00; C08L2555/00; C08L2555/40; C08L51/00; C08L51/06; C08L9/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
29 words
A process for producing a modified polypropylene which comprises reacting a polypropylene with a liquid rubber and maleic anhydride in a solvent in the presence of a radical generator.
Claim 2
Dependent Claim
29 words
A process for producing a modified polypropylene which comprises reacting a polypropylene with a liquid rubber and maleic anhydride in a solvent in the presence of a radical generator.
Claim 3
Dependent Claim
62 words
Process according to claim 1, wherein 100 parts by weight of polypropylene are reacted with from 1 to 20 parts by weight of liquid rubber and from 5 to 50 parts by weight of maleic anhydride in from 500 to 1,000 parts by weight of the solvent in the presence of from 0.5 to 10 parts by weight of the radical generator.
Claim 4
Dependent Claim
34 words
Process according to claim 1, wherein the radical generator is selected from the group consisting of benzoyl peroxide, lauroyl peroxide, azobis-isobutyronitrile, dicumyl peroxide, α,α'-bis(t-butylperoxydiisopropyl)benzene, 2,5-dimethyl-2,5-di(t-butylperoxy)hexane, di-t-butyl peroxide, cumene hydroperoxide, t-butyl hydroperoxide, and mixtures thereof.
Claim 5
Dependent Claim
25 words
Process according to claim 1, wherein the solvent is selected from the group consisting of xylene, toluene, tetralin, decalin, heptane, monochlorobenzene, dichlorobenzene, and mixtures thereof.
Claim 6
Dependent Claim
17 words
Process according to claim 1, wherein the liquid rubber is a terminal-hydroxylated poly-1,2-butadiene or a terminal-hydroxylated poly-1,4-butadiene.
Claim 7
Dependent Claim
25 words
Process according to claim 1, wherein the reaction temperature is from 50° to 150° C. and the reaction time is from 2 to 5 hours.
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) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |