US3900694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot melt adhesive containing amorphous polypropylene
Assignee: Phillips Petroleum Co
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Filing: 1972-08-30
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Granted: 1975-08-19
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Expires: 1992-08-30
Abstract
Abstract Hot melt adhesive composition with high softening temperatures are prepared from a mixture of amorphous polypropylene having a molecular weight range of 500 to 15,000, an olefin copolymer of 95 to 98 percent by weight propylene and 5 to 2 percent by weight ethylene, and a polytorpene tackifier. The improved hot melt adhesive formulation can contain from about 25 to about 35 percent by weight amorphous polypropylene, from about 35 to about 45 percent by weight of the olefin copolymer and from about 20 to about 40 percent by weight of a polyterpene tackifier and is particularly useful for sealing folding cartons and corrugated paperboard cartons.
Inventors
- 👤 Lawrence D Jurrens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:00
CPC Classifications
D; D21; D21H; D21H27/00; D21H27/30; D21H27/32; C; C09; C09J; C09J123/00; C09J123/02; C09J123/10; C09J123/12; C09J123/16; C08; C08L; C08L2666/00; C08L2666/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
94 words
A LAMINATE EXHIBITING GOOD BOND STRENGTH AT CROSSHEAD SPEEDS OF 0.2 INCHES PER MINUTE AS TESTED BY ASTM D 187661T COMPRISING AT LEAST TWO POROUS STRATA BONDED BY A DISTINCT INTERLAYED STRATUM OF A HOT MELT ADHESIVE CONSISTING OF (1) 25 TO 35 PERCENT BY WEIGHT AMORPHOUS POLYPROPYLENE HAVING A MOLECUALR WEIGHT RAGE OF 500 TO 15,000,(2) TO 45 PERCENT BY WEIGHT OF CRYSTALLINE OLEFIN COPOLYMER OF 95 TO 98 PERCENT BY WEIGHT POLYPROPYLENE AND 5 TO 2 PERCENT BY WEIGHT ETHYLENE, AND (3) 40 TO 20 PERCENT BY WEIGHT OF A POLYTERPENE TACKIFIER.
Claim 2
Dependent Claim
94 words
A LAMINATE EXHIBITING GOOD BOND STRENGTH AT CROSSHEAD SPEEDS OF 0.2 INCHES PER MINUTE AS TESTED BY ASTM D 187661T COMPRISING AT LEAST TWO POROUS STRATA BONDED BY A DISTINCT INTERLAYED STRATUM OF A HOT MELT ADHESIVE CONSISTING OF (1) 25 TO 35 PERCENT BY WEIGHT AMORPHOUS POLYPROPYLENE HAVING A MOLECUALR WEIGHT RAGE OF 500 TO 15,000,(2) TO 45 PERCENT BY WEIGHT OF CRYSTALLINE OLEFIN COPOLYMER OF 95 TO 98 PERCENT BY WEIGHT POLYPROPYLENE AND 5 TO 2 PERCENT BY WEIGHT ETHYLENE, AND (3) 40 TO 20 PERCENT BY WEIGHT OF A POLYTERPENE TACKIFIER.
Claim 3
Dependent Claim
11 words
A laminate of claim 1 wherein the porous strata are paper.
Claim 4
Dependent Claim
39 words
A laminate according to claim 1 wherein the hot melt adhesive composition contains an antioxidant formulation in the range of up to 0.1 percent by weight of the total weight of the total of amorphous polypropylene crystalline olefin copolymer.
Claim 5
Dependent Claim
22 words
A laminate of claim 1 wherein said amorphous polypropylene has a molecular weight in the range of about 500 to about 1500.
Claim 6
Dependent Claim
23 words
A laminate of claim 1 wherein said amorphous polypropylene has a molecular weight in the range of about 1,500 to about 15, 000.
Claim 7
Dependent Claim
56 words
A laminate of claim 1 wherein the hot melt adhesive consists of 28 to 32 percent by weight amorphous polypropylene; 38 to 42 percent by weight of a crystalline olefin copolymer of 95 to 98 percent by weight propylene and 5 to 2 percent by weight ethylene; and 35 to 25 percent by weight polyterpene tackifier.
Claim 8
Dependent Claim
47 words
A laminate of claim 1 wherein the hot melt adhesive consists of 30 percent by weight amorphous polypropylene, 40 percent by weight of a crystalline copolymer of about 97 percent by weight propylene and about 3 percent by weight ethylene; and 30 percent by weight polyterpene tackifier.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |