EP0366412A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Graft polymers of functionalized ethylene-alpha-olefin copolymer with polypropylene, methods of preparation, and use in polypropylene compositions
Assignee: ExxonMobil Chemical Patents Inc
•
Filing: 1989-10-24
•
Granted: —
•
Expires: 2009-10-24
Abstract
Abstract Graft polymer comprising functionalized ethylene-alpha-olefin copolymer having polypropylene grafted thereto through one or more functional linkages, the process for making the graft polymer comprising combining the functionalized ethylene-alpha-olefin with maleated polypropylene, the use of the graft polymer for improving the impact properties of polypropylene compositions, and improved polypropylene blends.
Inventors
- 👤 Sudhin Datta
- 👤 David John Lohse
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 11:50
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/003; C08L23/00; C08L23/02; C08L23/10; C08F; C08F255/00; C08F255/02; C08G; C08G81/00; C08G81/02; C08G81/021; C08L23/16; C08L51/06; C08L2205/00; C08L2205/03; C08L2205/035; C08L2314/00; C08L2314/02; C08L2666/00; C08L2666/02; C08L2666/24
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
19 words
A graft copolymer composition comprising a functionalized ethylene-alpha-olefin copolymer having polypropylene grafted thereto through one or more functional linkages.
Claim 2
Dependent Claim
19 words
A graft copolymer composition comprising a functionalized ethylene-alpha-olefin copolymer having polypropylene grafted thereto through one or more functional linkages.
Claim 3
Dependent Claim
39 words
The composition of claim 1 wherein said functionalized ethylene-alpha-olefin copolymer is comprised of ethylene, propylene and at least one functional group-containing monomer and said functional group is selected from the group consisting of hydroxy, primary amino, and secondary amino.
Claim 4
Dependent Claim
18 words
The composition of claim or 2 wherein said functionalized ethylene-alpha-olefin copolymer additionally comprises at least one diene monomer.
Claim 5
Dependent Claim
12 words
The composition of any preceding claim wherein said polypropylene comprises isotactic polypropylene.
Claim 6
Dependent Claim
39 words
The composition of any preceding claim wherein said functionalized ethylene-alpha-olefin copolymer comprises from 20 to 90 wt.% ethylene, 10 to 80 wt.% alpha-olefin, 0 to 15 wt.% diene monomers, and from 0.01 to 15 wt.% polar functional group-containing monomer.
Claim 7
Dependent Claim
17 words
The composition of any preceding claim wherein said polypropylene graft prior to said grafting is maleated polypropylene.
Claim 8
Dependent Claim
20 words
A polypropylene blend composition comprising isotactic polypropylene and a graft copolymer composition according to any one of the preceding claims.
Claim 9
Dependent Claim
11 words
The polypropylene blend composition of claim 7 further comprising ethylene-propylene rubber.
Claim 10
Dependent Claim
54 words
The polypropylene blend composition of claim 7 or 8 wherein said functionalized ethylene-alpha-olefin copolymer comprises from 20 to 90 wt.% ethylene, 10 to 80 wt.% alpha-olefin, 0 to 15 wt.% diene monomers, and from 0.01 to 15 wt.% polar functional group-containing monomer and wherein said polypropylene graft prior to said grafting is maleated polypropylene.
Claim 11
Dependent Claim
66 words
The polypropylene blend composition of claim 7, 8 or 9 wherein said isotactic polypropylene is present in an amount of from 45 to 98 wt.%, said ethylene-propylene rubber is present in an amount from 0 to 50 wt.%, and said graft copolymer composition is present in an amount from 0.1 to 25 wt.%, said weight percentages based upon the total weight of the polypropylene blend composition.
Claim 12
Dependent Claim
35 words
A process for preparing a graft copolymer composition comprising combining functionalized ethylene-alpha-olefin copolymer with maleated polypropylene under conditions sufficient to permit grafting of at least a minor portion of the functionalized polymer with the polypropylene.
Claim 13
Dependent Claim
35 words
A process for preparing a graft copolymer composition comprising combining functionalized ethylene-alpha-olefin copolymer with maleated polypropylene under conditions sufficient to permit grafting of at least a minor portion of the functionalized polymer with the polypropylene.
Claim 14
Dependent Claim
19 words
The process of claim 11 wherein said functionalized copolymer comprises ethylene, propylene, and at least one functional group-containing monomer.
Claim 15
Dependent Claim
91 words
A process in accordance with claim 11 or 12 comprising the steps of: A) combining under polymerization conditions sufficient to form said functionalized ethylene-alpha-olefin copolymer, ethylene, at least one alpha-olefin monomer, and at least one functional group-containing monomer, in the presence of a non-stereospecific Ziegler- Natta catalyst system selected for its capability for producing random copolymers; B) combining a polymer composition prepared in accordance with step A) and a maleated polypropylene composition under conditions sufficient to permit grafting of at least a minor portion of the functionalized copolymer with maleated polypropylene.
Claim 16
Dependent Claim
25 words
The process of claim 13 wherein at least one diene monomer is additionally combined in accordance with step A) to form said functionalized ethylene-alpha-olefin copolymer.
Claim 17
Dependent Claim
23 words
The process of claim 13 or 14 wherein the non-stereospecific Ziegler-Natta catalyst system comprises a hydrocarbon soluble Vanadium salt and an aluminum alkyl.
Claim 18
Dependent Claim
21 words
The process of claim 13, 14 or 15 wherein said combining of step A) occurs in a substantially mix-free, tubular reactor.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.