US4247502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting of high surface-tack hot melt adhesives
Assignee: Unitech Chemical Inc
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Filing: 1979-07-03
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Granted: 1981-01-27
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Expires: 1999-07-03
Abstract
Abstract High surface-tack hot melt adhesives, when coated with certain powders, can be cut into small pieces with little difficulty after extrusion onto a cooling belt.
Inventors
- 👤 Carl C. Loechell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:53
CPC Classifications
B; B26; B26D; B26D7/00; B26D7/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
101 words
A method of cutting high surface-tack hot melt adhesives which comprises heating the hot melt adhesive to a temperature of between about 225° F. and about 600° F., extruding the adhesive in the form of narrow strips of about one inch wide and less than about 1/2 inch in thickness onto a cooling belt, dusting the adhesive with a compatible powder in an amount to form a monomolecular coating thereon so that the subsequent performance of the adhesive properties is not impaired, and subdividing the dusted adhesive strips when they obtain a temperature of about 85° F. to about 115° F.
Claim 2
Independent Claim
101 words
A method of cutting high surface-tack hot melt adhesives which comprises heating the hot melt adhesive to a temperature of between about 225° F. and about 600° F., extruding the adhesive in the form of narrow strips of about one inch wide and less than about 1/2 inch in thickness onto a cooling belt, dusting the adhesive with a compatible powder in an amount to form a monomolecular coating thereon so that the subsequent performance of the adhesive properties is not impaired, and subdividing the dusted adhesive strips when they obtain a temperature of about 85° F. to about 115° F.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein the adhesive strips are dusted with about 0.5 to about 8 pounds of powder per 4,000 pounds of adhesive.
Claim 4
Dependent Claim
28 words
The method of claim 1 wherein the strips are dusted with a member selected from the group consisting of antioxidants, metal salts of di-n-alkyl dithiocarbamates and N,N'-dialkyl ethylenediamines.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein the dusting powder is zinc di-n-butylidithiocarbamate.
Claim 6
Dependent Claim
13 words
The method of claim 1 wherein the dusting powder is N,N' distearyl ethylenediamine.
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) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |