US3847769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for curing hydantoin-containing polyacrylates with ionising radiation
Assignee: Novartis AG
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Filing: 1972-01-13
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Granted: 1974-11-12
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Expires: 1992-01-13
Abstract
Abstract Process for curing polyacrylates, especially in the form of thin layers or coatings, of the formula WHEREIN R1 and R2 denote a hydrogen atom or the methyl group and n denotes the number 2 or 3 and A denotes an organic radical which contains at least one grouping WHEREIN Z represents a divalent radical required to complete a five-membered or six-membered ring, by means of ionising rays, for example electron beams, X-rays or gamma-rays. The resulting coatings show improved weathering resistance, extensibility and gloss retention.
Inventors
- 👤 P Garratt
- 👤 E Leumann
- 👤 P Zuppinger
- 👤 J Habermeier
- 👤 D Porret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:28
CPC Classifications
C; C09; C09D; C09D131/00; C09D131/02; B; B05; B05D; B05D3/00; B05D3/14; B05D3/141; B05D3/145; B05D3/147; Y; Y10; Y10S; Y10S522/00; Y10S522/915; Y10S525/00; Y10S525/908; Y10S525/922
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
48 words
PROCESS FOR CURING POLYACRYLATES BY MEANS OF IONIZING RAYS SELECTED FROM ACCELERATED ELECTRON RAYS IN THE DOSAGE OF FROM 0.5 TO 7 MEGARADS AND GAMMA RADIATION IN THE DOSAGE OF FROM 0.25 TO 1.25 MEGARADS, SAID DOSAGES PRODUCING NONTACKY FILMS CHARACTERIZED IN THAT COMPOUNDS OF THE FORMULA I
Claim 2
Dependent Claim
48 words
PROCESS FOR CURING POLYACRYLATES BY MEANS OF IONIZING RAYS SELECTED FROM ACCELERATED ELECTRON RAYS IN THE DOSAGE OF FROM 0.5 TO 7 MEGARADS AND GAMMA RADIATION IN THE DOSAGE OF FROM 0.25 TO 1.25 MEGARADS, SAID DOSAGES PRODUCING NONTACKY FILMS CHARACTERIZED IN THAT COMPOUNDS OF THE FORMULA I
Claim 3
Dependent Claim
34 words
Process according to claim 1, characterized in that polyacrylates of formula I mixed with olefinically unsaturated monomers in the ratio of 66 to 80 to 34 to 20 parts by weight, respectively, are irradiated.
Claim 4
Dependent Claim
35 words
Process according to claim 1, characterised in that the curing of the polyacrylates is effected with an ionising radiation by means of electrons of average energy at least 50 keV and at most 4 MeV.
Claim 5
Dependent Claim
30 words
Process according to claim 1, characterised in that the curing of the polyacrylates is effected with an ionising radiation by means of electrons of average energy 50 to 600 KeV.
Claim 6
Dependent Claim
24 words
Process according to claim 1, characterised in that the curing of the polyacrylates is effected with an ionising radiation in the form of gammarays.
Claim 7
Dependent Claim
27 words
Process according to claim 1, characterised in that the polyacrylates are additionally subjected to a heat treatment before, during or after the action of an ionising radiation.
Claim 8
Dependent Claim
29 words
Process according to claim 1, characterised in that the action of an ionising radiation on the polyacrylates is allowed to take place in an atmosphere of low oxygen content.
Claim 9
Dependent Claim
24 words
Process according to claim 1, characterised in that polyacrylates of the formula I are used, in which the radical A contains one hydantoinylene group.
Claim 10
Dependent Claim
26 words
Process according to claim 1, characterised in that polyacrylates of the formula I are used in which the radical A denotes a radical of the formula
Claim 11
Dependent Claim
26 words
Process according to claim 9, characterised in that polyacrylates of the formula I are used to which the radical A denotes a radical of the formula
Claim 12
Dependent Claim
26 words
Process according to claim 1, characterised in that polyacrylates of the formula I are used in Which the radical A contains at least two hydantoinylene groups.
Claim 13
Dependent Claim
26 words
Process according to claim 11, characterised in that polyacrylates of the formula I are used in which the radical A denotes a radical of the formulae
Claim 14
Dependent Claim
32 words
Process according to claim 2, characterised in that the curable polyacrylate mixture contains methyl acrylate, butyl acrylate, methyl methacrylate, acrylonitrile, styrene, ethylene glycol dimethacrylate, divinylbenzene, vinyl acetate or diallyl-o-phthalate as the monomer.
Claim 15
Dependent Claim
19 words
Process according to claim 1, characterised in that the curable synthetic resin mixture additionally contains fillers, pigments and/or plasticisers.
References Cited (Backward Citations)
US3377406A
Cited
US3432478A
Cited
US3408422A
Cited
US3256226A
Cited
US3641064A
Cited
US3640910A
Cited
US3586529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |