US4382128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin grafted with polycarboxylic acid, ester or anhydride and modified with polyhydroxy compound
Assignee: Standard Oil Co
•
Filing: 1981-05-11
•
Granted: 1983-05-03
•
Expires: 2001-05-11
Abstract
Abstract Moldable polyolefin compositions exhibiting improved heat distortion and modulus characteristics, and a method of preparing such compositions are described. The method of preparing these polyolefin compositions comprises reacting (a) a graft-modified polyolefin obtained by reacting a polyolefin with an unsaturated polycarboxylic acid, ester or anhydride which is graft-polymerizable therewith, and (b) at least one organic hydroxy compound. These polyolefin compositions can be reinforced with fibers, minerals and fillers for particular applications.
Inventors
- 👤 George S. Li
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:53
CPC Classifications
C; C08; C08F; C08F255/00; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/053
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
63 words
A method of preparing polyolefin compositions having improved properties which comprises reacting (a) a graft-modified polyolefin obtained by reacting a polyolefin with an unsaturated polycarboxylic acid, ester or anhydride which is graft-polymerizable therewith, and (b) at least one organic polyhydroxy compound, the molar ratio of said organic polyhydroxy compound to unreacted unsaturated polycarboxylic acid, ester or anhydride in (a) being at least 5:1.
Claim 2
Independent Claim
63 words
A method of preparing polyolefin compositions having improved properties which comprises reacting (a) a graft-modified polyolefin obtained by reacting a polyolefin with an unsaturated polycarboxylic acid, ester or anhydride which is graft-polymerizable therewith, and (b) at least one organic polyhydroxy compound, the molar ratio of said organic polyhydroxy compound to unreacted unsaturated polycarboxylic acid, ester or anhydride in (a) being at least 5:1.
Claim 3
Dependent Claim
42 words
The method of claim 1 wherein the polyolefin in (a) is derived from at least one monoolefin containing from about 2 to 12 carbon atoms, or mixtures of one or more monoolefins with a diolefin containing up to about 12 carbon atoms.
Claim 4
Dependent Claim
19 words
The method of claim 1 wherein the polycarboxylic acid, ester or anhydride is a dicarboxylic acid, ester or anhydride.
Claim 5
Dependent Claim
13 words
The method of claim 3 wherein the dicarboxylic acid anhydride is maleic anhydride.
Claim 6
Dependent Claim
12 words
The method of claim 3 wherein the polyolefin is derived from polypropylene.
Claim 7
Dependent Claim
26 words
The method of claim 1 wherein the polyolefin of (a) is a copolymer of propylene with up to about 25 mole percent of another alpha olefin.
Claim 8
Dependent Claim
27 words
The method of claim 1 wherein the polyolefin is reacted in (a) with from about 0.1 to 10 weight percent of the polycarboxylic acid, ester or anhydride.
Claim 9
Dependent Claim
20 words
The method of claim 1 wherein the polyhydroxy compound is an aliphatic, cycloaliphatic or aromatic, monomeric or polymeric polyhydroxy compound.
Claim 10
Dependent Claim
14 words
The method of claim 8 wherein the polyhydroxy compound is an aliphatic polyhydroxy compound.
Claim 11
Dependent Claim
15 words
The method of claim 8 wherein the polyhydroxy compound is an aliphatic or aromatic polyetherpolyol.
Claim 12
Dependent Claim
17 words
A polyolefin composition prepared in accordance with the process of any one of claims 1 to 10.
Claim 13
Dependent Claim
20 words
The polyolefin composition of claim 11 also containing up to about 75 percent by weight of fibrous material and fillers.
Claim 14
Independent Claim
61 words
A method of preparing polypropylene compositions having improved properties which comprises reacting (a) a graft-modified propylene polymer obtained by grafting a propylene polymer with from about 0.1 to about 10 weight percent of maleic anhydride, with (b) at least one organic polyhydroxy compound, the molar ratio of said organic polyhydroxy compound to unreacted maleic anhydride in (a) being at least 5:1.
Claim 15
Independent Claim
61 words
A method of preparing polypropylene compositions having improved properties which comprises reacting (a) a graft-modified propylene polymer obtained by grafting a propylene polymer with from about 0.1 to about 10 weight percent of maleic anhydride, with (b) at least one organic polyhydroxy compound, the molar ratio of said organic polyhydroxy compound to unreacted maleic anhydride in (a) being at least 5:1.
Claim 16
Dependent Claim
29 words
The method of claim 13 wherein the graft-modified propylene polymer is reacted with from about 0.5 to about 10 percent by weight of at least one organic polyhydroxy compound.
Claim 17
Dependent Claim
14 words
The method of claim 14 wherein the polyhydroxy compound is an aliphatic polyhydroxy compound.
Claim 18
Dependent Claim
15 words
The method of claim 14 wherein the polyhydroxy compound is an aliphatic or aromatic polyetherpolyol.
Claim 19
Dependent Claim
17 words
A polypropylene composition prepared in accordance with the process of any one of claims 13 through 16.
Claim 20
Dependent Claim
24 words
The composition of claim 17 wherein the polypropylene composition is reinforced with up to about 50 percent by weight of glass fibers and fillers.
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) | 1986-05-02 | 1986-11-01 | 1987-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-02 | 1990-11-01 | 1991-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-02 | 1994-11-01 | 1995-05-03 | $7700.00 | Window Closed / Lapsed |