US3884786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot melt compositions produced by irradiating ethylene copolymers in the presence of wax
Assignee: Union Carbide Corp
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Filing: 1973-10-02
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Granted: 1975-05-20
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Expires: 1993-10-02
Abstract
Abstract Hot melt compositions produced by preparing a concentrate of wax and copolymer, irradiating the concentrate to produce an irradiated concentrate and then diluting the irradiated concentrate with additional quantities of wax to obtain the hot melt composition. The improved three step method permits the incorporation of copolymers having higher molecular weights in the hot melt composition; it was also found that the copolymers are more readily dissolved in the wax. The copolymers used are the ethylene-vinyl acylate and ethylene-alkyl acrylate copolymers.
Inventors
- 👤 Joseph Dominic Domine
- 👤 Roy Henry Schaufelberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:33
CPC Classifications
C; C08; C08L; C08L91/00; C08L91/06; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
103 words
AN IRRADIATED CONCENTRATE OF WAX AND AN ETHYLEN-VINYL ACYLATE COPOLYMER OR AN ETHYLENE-ALKYL ACRYLATE COPOLYMER CONTANING A MAJOR AMOUNT OF SAID COPOLYMER, WHEREIN THE VINYL ACYLATE OR THE ALKYL ACRYLATE CONTENT IS FROM 5 TO 20 WEIGHT PERCENT, SAID COPOLYMER HAVING AN INITIAL METAL INDEX OF FROM ABOUT 1.5 DGM./MIN. TO ABOUT 100 DGM./MIN., SAID IRRADIATED CONCENTRATE OBTAINED BY THE STEPS OF (A) PRODUCING A CONCENTRATE OF SAID WAX AND SAID COPOLYMER AND (B) IRRADIATING SAID CONCENTRATE WITH HIGH ENERGY IONIZING RADIATION OF AN ABSORBED DOSE OF FROM 0.01 TO 5 MEGRAR MOLECULAR WEIGHT OF SAID COPOLYMER AND THEREBY PRODUCE SAID IRRADIATED CONCENTRATE.
Claim 2
Dependent Claim
103 words
AN IRRADIATED CONCENTRATE OF WAX AND AN ETHYLEN-VINYL ACYLATE COPOLYMER OR AN ETHYLENE-ALKYL ACRYLATE COPOLYMER CONTANING A MAJOR AMOUNT OF SAID COPOLYMER, WHEREIN THE VINYL ACYLATE OR THE ALKYL ACRYLATE CONTENT IS FROM 5 TO 20 WEIGHT PERCENT, SAID COPOLYMER HAVING AN INITIAL METAL INDEX OF FROM ABOUT 1.5 DGM./MIN. TO ABOUT 100 DGM./MIN., SAID IRRADIATED CONCENTRATE OBTAINED BY THE STEPS OF (A) PRODUCING A CONCENTRATE OF SAID WAX AND SAID COPOLYMER AND (B) IRRADIATING SAID CONCENTRATE WITH HIGH ENERGY IONIZING RADIATION OF AN ABSORBED DOSE OF FROM 0.01 TO 5 MEGRAR MOLECULAR WEIGHT OF SAID COPOLYMER AND THEREBY PRODUCE SAID IRRADIATED CONCENTRATE.
Claim 3
Dependent Claim
31 words
An irradiated concentrate as claimed in claim 1, wherein the vinyl acylate is vinyl acetate and wherein said copolymer in said irradiated concentrate has a melt index below about 1 dgm./min.
Claim 4
Dependent Claim
31 words
An irradiated concentrate as claimed in claim 1, wherein the alkyl acrylate is ethyl acrylate and wherein said copolymer in said irradiated concentrate has a melt index below about 1 dgm./min.
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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |