Patent US4526919A successfully refreshed from Google Patents.
US4526919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin extrusion coating compositions having good coatability and good adhesion to the substrate
Assignee: Huntsman Corp
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Filing: 1984-06-27
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Granted: 1985-07-02
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Expires: 2004-06-27
Abstract
Abstract This invention relates to novel blends containing crystalline polypropylene or propylene containing copolymer, low density polyethylene, hydrocarbon tackifying resin, and a fatty acid amide useful as extrusion coating compositions which provide coatings having good coatability and good heat sealability. These coated substrates then can be used in fabricating bags and other packaging applications. These extrusion coating compositions are a blend of a crystalline polypropylene, or propylene containing copolymer, low density polyethylene, hydrocarbon tackifying resin, and a fatty acid amide containing 16 to 40 carbon atoms.
Inventors
- 👤 Ray Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:43
CPC Classifications
C; C09; C09D; C09D123/00; C09D123/02; C09D123/10; C08; C08K; C08K5/00; C08K5/16; C08K5/20; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/10; C09J; C09J123/00; C09J123/02; C09J123/10; C08L2666/00; C08L2666/02; C08L2666/28
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
174 words
An extrusion coating composition having a flow rate of 40 to 100 dg/min. at 230° C. which provides coatings of less than 1 mil which have heat seal strengths of at least 4.5 kg. per linear 2.5 cm. at coating speeds greater than 122 m./min. comprising a blend of (1) about 90 to 65 percent, by weight, of at least one crystalline polypropylene or propylene containing copolymer containing at least 80 weight percent propylene and having a melt flow rate of 30 to 140 dg/min. at 230° C., and (2) about 5 to 20 percent, by weight, of at least one polyethylene having a density of 0.916 to 0.925, a melt index at 190° C. of 2 to 7, and a swell ratio of about 1.5 to 2.2, (3) about 0.5 to 12.5 percent, by weight, of a hydrocarbon tackifying resin having a Ring and Ball softening point of about 75° C. to about 150° C., and (4) about 0.2 to 1.0 percent, by weight, fatty acid amide having 16 to 40 carbon atoms.
Claim 2
Dependent Claim
174 words
An extrusion coating composition having a flow rate of 40 to 100 dg/min. at 230° C. which provides coatings of less than 1 mil which have heat seal strengths of at least 4.5 kg. per linear 2.5 cm. at coating speeds greater than 122 m./min. comprising a blend of (1) about 90 to 65 percent, by weight, of at least one crystalline polypropylene or propylene containing copolymer containing at least 80 weight percent propylene and having a melt flow rate of 30 to 140 dg/min. at 230° C., and (2) about 5 to 20 percent, by weight, of at least one polyethylene having a density of 0.916 to 0.925, a melt index at 190° C. of 2 to 7, and a swell ratio of about 1.5 to 2.2, (3) about 0.5 to 12.5 percent, by weight, of a hydrocarbon tackifying resin having a Ring and Ball softening point of about 75° C. to about 150° C., and (4) about 0.2 to 1.0 percent, by weight, fatty acid amide having 16 to 40 carbon atoms.
Claim 3
Dependent Claim
19 words
An extrusion coating composition according to claim 1 wherein said crystalline polypropylene or propylene containing copolymer is crystalline polypropylene.
Claim 4
Dependent Claim
24 words
An extrusion coating composition according to claim 2 wherein said crystalline polypropylene has a melt flow rate of 50 to 70 at 230° C.
Claim 5
Dependent Claim
34 words
An extrusion coating composition according to claim 3 wherein said low density polyethylene has a melt index of 3.5 dg/min. at 190° C., a density of 0.917 g/cc, and a swell ratio of 1.70.
Claim 6
Dependent Claim
28 words
An extrusion coating composition according to claim 4 wherein said tackifying resin is a hydrocarbon tackifying resin having a Ring and Ball softening point of about 130° C.
Claim 7
Dependent Claim
37 words
An extrusion coating composition according to claim 4 wherein said tackifying resin is pentaerythritol ester of tall oil rosin having a Ring and Ball softening point of about 100° C. and an acid number of about 11.
Claim 8
Dependent Claim
16 words
An extrusion coating composition according to claim 6 wherein said fatty acid amide is stearyl erucamide.
Claim 9
Dependent Claim
173 words
An extrusion coating composition having a flow rate of 45 to 60 dg/min. at 230° C. which provides coatings of less than 1 mil which have heat seal strengths of at least 4.5 kg. per linear 2.5 cm. at coating speeds greater than 122 m./min. comprising a blend of (1) about 90 to 80 percent, by weight, of at least one crystalline polypropylene or propylene containing copolymer containing at least 80 weight percent propylene and having a melt flow rate of 30 to 140 dg/min. at 230° C., and (2) about 5 to 10 percent, by weight, of at least one polyethylene having a density of 0.916 to 0.925, a melt index at 190° C. of 2 to 7, and a swell ratio of about 1.5 to 2.2, (3) about 2 to 10 percent, by weight, of a tackifying resin having a Ring and Ball softening point of about 75° C. to about 150° C., and (4) about 0.3 to 0.5 percent, by weight, fatty acid amide having 16 to 40 carbon atoms.
Claim 10
Dependent Claim
173 words
An extrusion coating composition having a flow rate of 45 to 60 dg/min. at 230° C. which provides coatings of less than 1 mil which have heat seal strengths of at least 4.5 kg. per linear 2.5 cm. at coating speeds greater than 122 m./min. comprising a blend of (1) about 90 to 80 percent, by weight, of at least one crystalline polypropylene or propylene containing copolymer containing at least 80 weight percent propylene and having a melt flow rate of 30 to 140 dg/min. at 230° C., and (2) about 5 to 10 percent, by weight, of at least one polyethylene having a density of 0.916 to 0.925, a melt index at 190° C. of 2 to 7, and a swell ratio of about 1.5 to 2.2, (3) about 2 to 10 percent, by weight, of a tackifying resin having a Ring and Ball softening point of about 75° C. to about 150° C., and (4) about 0.3 to 0.5 percent, by weight, fatty acid amide having 16 to 40 carbon atoms.
Claim 11
Dependent Claim
19 words
An extrusion coating composition according to claim 8 wherein said crystalline polypropylene or propylene containing copolymer is crystalline polypropylene.
Claim 12
Dependent Claim
24 words
An extrusion coating composition according to claim 9 wherein said crystalline polypropylene has a melt flow rate of 50 to 70 at 230° C.
Claim 13
Dependent Claim
34 words
An extrusion coating composition according to claim 10 wherein said low density polyethylene has a melt index of 3.5 dg/min. at 190° C., a density of 0.917 g/cc, and a swell ratio of 1.70.
Claim 14
Dependent Claim
28 words
An extrusion coating composition according to claim 11 wherein said tackifying resin is a hydrocarbon tackifying resin having a Ring and Ball softening point of about 130° C.
Claim 15
Dependent Claim
37 words
An extrusion coating composition according to claim 11 wherein said tackifying resin is pentaerythritol ester of tall oil rosin having a Ring and Ball softening point of about 100° C. and an acid number of about 11.
Claim 16
Dependent Claim
16 words
An extrusion coating composition according to claim 13 wherein said fatty acid amide is stearyl erucamide.
Claim 17
Dependent Claim
173 words
An extrusion coating composition having a flow rate of 45 to 55 dg/min. at 230° C. which provides coatings of less than 1 mil which have heat seal strengths of at least 4.5 kg. per linear 2.5 cm. at coating speeds greater than 122 m./min. comprising a blend of (1) about 90 to 80 percent, by weight, of at least one crystalline polypropylene or propylene containing copolymer containing at least 80 weight percent propylene and having a melt flow rate of 30 to 140 dg/min. at 230° C., and (2) about 5 to 10 percent, by weight, of at least one polyethylene having a density of 0.916 to 0.925, a melt index at 190° C. of 2 to 7, and a swell ratio of about 1.5 to 2.2, (3) about 2 to 10 percent, by weight, of a tackifying resin having a Ring and Ball softening point of about 75° C. to about 150° C., and (4) about 0.3 to 0.5 percent, by weight, fatty acid amide having 16 to 40 carbon atoms.
Claim 18
Dependent Claim
173 words
An extrusion coating composition having a flow rate of 45 to 55 dg/min. at 230° C. which provides coatings of less than 1 mil which have heat seal strengths of at least 4.5 kg. per linear 2.5 cm. at coating speeds greater than 122 m./min. comprising a blend of (1) about 90 to 80 percent, by weight, of at least one crystalline polypropylene or propylene containing copolymer containing at least 80 weight percent propylene and having a melt flow rate of 30 to 140 dg/min. at 230° C., and (2) about 5 to 10 percent, by weight, of at least one polyethylene having a density of 0.916 to 0.925, a melt index at 190° C. of 2 to 7, and a swell ratio of about 1.5 to 2.2, (3) about 2 to 10 percent, by weight, of a tackifying resin having a Ring and Ball softening point of about 75° C. to about 150° C., and (4) about 0.3 to 0.5 percent, by weight, fatty acid amide having 16 to 40 carbon atoms.
Claim 19
Dependent Claim
19 words
An extrusion coating composition according to claim 15 wherein said crystalline polypropylene or propylene containing copolymer is crystalline polypropylene.
Claim 20
Dependent Claim
24 words
An extrusion coating composition according to claim 16 wherein said crystalline polypropylene has a melt flow rate of 50 to 70 at 230° C.
Claim 21
Dependent Claim
34 words
An extrusion coating composition according to claim 17 wherein said low density polyethylene has a melt index of 3.5 dg/min. at 190° C., a density of 0.917 g/cc, and a swell ratio of 1.70.
Claim 22
Dependent Claim
28 words
An extrusion coating composition according to claim 18 wherein said tackifying resin is a hydrocarbon tackifying resin having a Ring and Ball softening point of about 130° C.
Claim 23
Dependent Claim
37 words
An extrusion coating composition according to claim 18 wherein said tackifying resin is pentaerythritol ester of tall oil rosin having a Ring and Ball softening point of about 100° C. and an acid number of about 11.
Claim 24
Dependent Claim
16 words
An extrusion coating composition according to claim 20 wherein said fatty acid amide is stearyl erucamide.
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) | 1988-07-01 | 1988-12-31 | 1989-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-01 | 1992-12-31 | 1993-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-01 | 1996-12-31 | 1997-07-02 | $7700.00 | Window Closed / Lapsed |