US4528312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Degraded polyolefin containing extrusion coating compositions having good adhesion to a substrate at fast coating speeds
Assignee: Huntsman Corp
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Filing: 1984-06-27
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Granted: 1985-07-09
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Expires: 2004-06-27
Abstract
Abstract This invention relates to novel blends containing degraded 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. Particularly, these coatings are a blend of a degraded 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 20:51
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: 28
Claim 1
Independent Claim
158 words
An extrusion coating composition having a flow rate of 5 to 40 dg/min. at 230° C. which provides coatings of less than 1 mil which have heat seal strengths of at least 7 kg. per linear 2.5 cm. at coating speeds greater than 180 m./min. comprising a blend of (1) about 90 to 75 percent, by weight, of at least one degraded crystalline polypropylene or propylene containing copolymer containing at least 80 weight percent propylene and having a melt flow rate of 1 to 100 dg/min. at 230° C., and (2) about 2.5 to 15 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, about 0.5 to 12.5 percent, by weight, of a hydrocarbon tackifying resin, and about 0.2 to 1.0 percent, by weight, fatty acid amide containing 16 to 40 carbon atoms.
Claim 2
Dependent Claim
158 words
An extrusion coating composition having a flow rate of 5 to 40 dg/min. at 230° C. which provides coatings of less than 1 mil which have heat seal strengths of at least 7 kg. per linear 2.5 cm. at coating speeds greater than 180 m./min. comprising a blend of (1) about 90 to 75 percent, by weight, of at least one degraded crystalline polypropylene or propylene containing copolymer containing at least 80 weight percent propylene and having a melt flow rate of 1 to 100 dg/min. at 230° C., and (2) about 2.5 to 15 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, about 0.5 to 12.5 percent, by weight, of a hydrocarbon tackifying resin, and about 0.2 to 1.0 percent, by weight, fatty acid amide containing 16 to 40 carbon atoms.
Claim 3
Dependent Claim
20 words
An extrusion coating composition according to claim 1 wherein said degraded crystalline polypropylene or propylene containing copolymer is crystalline polypropylene.
Claim 4
Dependent Claim
23 words
An extrusion coating composition according to claim 2 wherein said degraded crystalline polypropylene has a melt flow rate of 15 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
27 words
An extrusion 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
28 words
An extrusion coating composition according to claim 2 wherein said degraded crystalline polypropylene or propylene containing copolymer is crystalline ethylene/propylene copolymer containing less than 5 weight percent ethylene.
Claim 10
Dependent Claim
24 words
An extrusion coating composition according to claim 8 wherein said degraded crystalline ethylene/propylene copolymer has a melt flow rate of 10 at 230° C.
Claim 11
Dependent Claim
34 words
An extrusion coating composition according to claim 9 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 12
Dependent Claim
27 words
An extrusion composition according to claim 10 wherein said tackifying resin is a hydrocarbon tackifying resin having a Ring and Ball softening point of about 130° C.
Claim 13
Dependent Claim
37 words
An extrusion coating composition according to claim 10 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 14
Dependent Claim
16 words
An extrusion coating composition according to claim 12 wherein said fatty acid amide is stearyl erucamide.
Claim 15
Dependent Claim
158 words
An extrusion coating composition having a flow rate of 5 to 40 dg/min. at 230° C. which provides coatings of less than 1 mil which have heat seal stengths of at least 7 kg. per linear 2.5 cm. at coating speeds greater than 180 m./min. comprising a blend of (1) about 90 to 80 percent, by weight, of at least one degraded crystalline polypropylene or propylene containing copolymer containing at least 80 weight percent propylene and having a melt flow rate of 1 to 100 dg/min. at 230° C., and (2) about 5 to 7.5 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, about 0.5 to 10 percent, by weight, of a hydrocarbon tackifying resin, and about 0.2 to 0.5 percent, by weight, fatty acid amide containing 16 to 40 carbon atoms.
Claim 16
Dependent Claim
158 words
An extrusion coating composition having a flow rate of 5 to 40 dg/min. at 230° C. which provides coatings of less than 1 mil which have heat seal stengths of at least 7 kg. per linear 2.5 cm. at coating speeds greater than 180 m./min. comprising a blend of (1) about 90 to 80 percent, by weight, of at least one degraded crystalline polypropylene or propylene containing copolymer containing at least 80 weight percent propylene and having a melt flow rate of 1 to 100 dg/min. at 230° C., and (2) about 5 to 7.5 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, about 0.5 to 10 percent, by weight, of a hydrocarbon tackifying resin, and about 0.2 to 0.5 percent, by weight, fatty acid amide containing 16 to 40 carbon atoms.
Claim 17
Dependent Claim
20 words
An extrusion coating composition according to claim 14 wherein said degraded crystalline polypropylene or propylene containing copolymer is crystalline polypropylene.
Claim 18
Dependent Claim
23 words
An extrusion coating composition according to claim 15 wherein said degraded crystalline polypropylene has a melt flow rate of 15 at 230° C.
Claim 19
Dependent Claim
34 words
An extrusion coating composition according to claim 16 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 20
Dependent Claim
27 words
An extrusion composition according to claim 17 wherein said tackifying resin is a hydrocarbon tackifying resin having a Ring and Ball softening point of about 130° C.
Claim 21
Dependent Claim
37 words
An extrusion coating composition according to claim 17 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 22
Dependent Claim
16 words
An extrusion coating composition according to claim 19 wherein said fatty acid amide is stearyl erucamide.
Claim 23
Dependent Claim
28 words
An extrusion coating composition according to claim 15 wherein said degraded crystalline polypropylene or propylene containing copolymer is crystalline ethylene/propylene copolymer containing less than 5 weight percent ethylene.
Claim 24
Dependent Claim
24 words
An extrusion coating composition according to claim 21 wherein said degraded crystalline ethylene/propylene copolymer has a melt flow rate of 10 at 230° C.
Claim 25
Dependent Claim
34 words
An extrusion coating composition according to claim 22 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 26
Dependent Claim
27 words
An extrusion composition according to claim 23 wherein said tackifying resin is a hydrocarbon tackifying resin having a Ring and Ball softening point of about 130° C.
Claim 27
Dependent Claim
37 words
An extrusion coating composition according to claim 23 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 28
Dependent Claim
16 words
An extrusion coating composition according to claim 25 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) | 1988-07-08 | 1989-01-07 | 1989-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-08 | 1993-01-07 | 1993-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-08 | 1997-01-07 | 1997-07-09 | $7700.00 | Window Closed / Lapsed |