Patent US4888391A successfully refreshed from Google Patents.
US4888391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paintable thermoplastic polyolefin compositions having improved flexural properties
Assignee: Advanced Elastomer Systems LP
•
Filing: 1988-08-12
•
Granted: 1989-12-19
•
Expires: 2008-08-12
Abstract
Abstract A polyolefin composition of ethylene, propylene, or copolymers thereof having good paint retention and improved flexural modulus is described. The properties result from incorporation into said polyolefin of a discontinuous phase made up of an ethylene/lower alkyl (meth)acrylate/(meth)acrylic acid terpolymer. This composition is particularly useful for molding paintable auto parts.
Inventors
- 👤 Joseph D. Domine
- 👤 Anton J. Buchner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:14
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L2205/00; C08L2205/02; C08L2205/03; C08L2205/035; C08L23/04; C08L23/06; C08L23/08; C08L23/0846; C08L23/0869; C08L23/16
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
70 words
A molded part having good paint adhesion and a lowered Secant Flexural Modulus molded from a thermoplastic polyolefin composition consisting essentially of from 70 wt % to 85 wt % polypropylene and ethylene/propylene copolymer elastomer and from 15 wt % to 30 wt % of a terpolymer consisting essentially of ethylene, 5 wt % to 25 wt % methyl acrylate and 4.5 wt % to 8 wt % acrylic acid.
Claim 2
Dependent Claim
70 words
A molded part having good paint adhesion and a lowered Secant Flexural Modulus molded from a thermoplastic polyolefin composition consisting essentially of from 70 wt % to 85 wt % polypropylene and ethylene/propylene copolymer elastomer and from 15 wt % to 30 wt % of a terpolymer consisting essentially of ethylene, 5 wt % to 25 wt % methyl acrylate and 4.5 wt % to 8 wt % acrylic acid.
Claim 3
Dependent Claim
11 words
The part of claim 1 is a molded auto body part.
Claim 4
Dependent Claim
102 words
A thermoplastic polyolefin exhibiting good paint adhesion and having a reduced flexural modulus and improved elongation comprising: (A) as a continuous phase, a blend of from about 60 to about 90 parts by weight of (1) propylene polymer and (2) ethylene-propylene copolymer elastomer; and (B) as a dispersed phase from about 10 to about 40 parts by weight of an ethylene/lower alkyl acrylic acid terpolymer wherein said terpolymer comprises from about 4% to about 30% by weight of a lower alkyl acrylate, and from about 3% to about 10% by weight of acrylic acid with the balance of said terpolymer being ethylene.
Claim 5
Dependent Claim
102 words
A thermoplastic polyolefin exhibiting good paint adhesion and having a reduced flexural modulus and improved elongation comprising: (A) as a continuous phase, a blend of from about 60 to about 90 parts by weight of (1) propylene polymer and (2) ethylene-propylene copolymer elastomer; and (B) as a dispersed phase from about 10 to about 40 parts by weight of an ethylene/lower alkyl acrylic acid terpolymer wherein said terpolymer comprises from about 4% to about 30% by weight of a lower alkyl acrylate, and from about 3% to about 10% by weight of acrylic acid with the balance of said terpolymer being ethylene.
Claim 6
Dependent Claim
47 words
The paintable thermoplastic polyolefin of claim 3, wherein said dispersed phase is a terpolymer comprising from 5% to about 25% by weight of methyl acrylate, from 4.5% to 8% by weight of acrylic acid, and ethylene, and having a melt index of about 4 to about 6.
Claim 7
Dependent Claim
31 words
The thermoplastic polyolefin of claim 3 wherein the continuous phase is from 70 parts to 85 parts by weight of (1) a copolymer of propylene and an (2) ethylene/propylene copolymer elastomer.
Claim 8
Dependent Claim
18 words
The thermoplastic polyolefin of claim 3 wherein the terpolymer contains from 5% to 25% by weight methyl acrylate.
Claim 9
Dependent Claim
18 words
The thermoplastic polyolefin of claim 6 wherein the terpolymer contains from 4.5% to 8% by weight acrylic acid.
Claim 10
Dependent Claim
22 words
The thermoplastic polyolefin of claim 5 wherein the continuous phase includes from about 8% to about 12% by weight high density polyethylene.
Claim 11
Dependent Claim
21 words
The thermoplastic polyolefin of claim 3 wherein the terpolymer has a melt index of from about 1 to about 10 dg/min.
Claim 12
Dependent Claim
16 words
The thermoplatic polyolefin of claim 3 wherein said propylene polymer of said continuous phase comprises polypropylene.
Claim 13
Dependent Claim
14 words
The thermoplatic polyolefin of claim 10 wherein said polypropylene is an impact polypropylene copolymer.
References Cited (Backward Citations)
US3410928A
Cited
US3249570A
Cited
US4277578A
Cited
US4433073A
Cited
US4420580A
Cited
WO1986004912A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-18 | 1993-06-19 | 1993-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-18 | 1997-06-19 | 1997-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-18 | 2001-06-19 | 2001-12-19 | $7700.00 | Window Closed / Lapsed |