US4113593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzophenone-containing photopolymerizable binders for printing inks and coating compositions
Assignee: BASF SE
•
Filing: 1977-09-19
•
Granted: 1978-09-12
•
Expires: 1997-09-19
Abstract
Abstract Photopolymerizable binders for UV-curing printing inks and coating compositions, which contain benzophenone-based photoinitiators and photosensitizers including p-dimethylaminobenzaldehyde and esters of p-dimethylaminobenzoic acid.
Inventors
- 👤 Helmut Barzynski
- 👤 Guenter Heil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:17
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/101; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/12; Y10S522/00; Y10S522/904; Y10S522/905; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24868; Y10T428/24917; Y10T428/24934
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
118 words
A binder for UV-curing coating compositions and printing inks, based on one or more polymerizable olefinically unsaturated compounds, which contains, as photoinitiator, a mixture of (a) a photoinitiator which consists essentially of benzophenone or a benzophenone derivative which has a relatively low absorption at from 300 to 380 nm and (b) a photosensitizer which has a stronger absorption in the same wavelength range, wherein the sensitizer (b) consists essentially of p-dimethylaminobenzaldehyde or an ester of p-dimethylaminobenzoic acid of the formula ##STR2## where R is alkyl of 1 to 12 carbon atoms, aryl of 6 to 14 carbon atoms or cycloalkyl or aralkyl of 15 to 40 carbon atoms and a second p-diemthylaminobenzoate group may be present in R.
Claim 2
Dependent Claim
118 words
A binder for UV-curing coating compositions and printing inks, based on one or more polymerizable olefinically unsaturated compounds, which contains, as photoinitiator, a mixture of (a) a photoinitiator which consists essentially of benzophenone or a benzophenone derivative which has a relatively low absorption at from 300 to 380 nm and (b) a photosensitizer which has a stronger absorption in the same wavelength range, wherein the sensitizer (b) consists essentially of p-dimethylaminobenzaldehyde or an ester of p-dimethylaminobenzoic acid of the formula ##STR2## where R is alkyl of 1 to 12 carbon atoms, aryl of 6 to 14 carbon atoms or cycloalkyl or aralkyl of 15 to 40 carbon atoms and a second p-diemthylaminobenzoate group may be present in R.
Claim 3
Dependent Claim
46 words
A binder as set forth in claim 1, wherein the olefinically unsaturated compound or compounds are selected from esters and amides of unsaturated carboxylic acids, vinyl esters, N-vinyl compounds, allyl compounds, unsaturated epoxy resins and unsaturated polyurethanes, or mixtures of two or more of these materials.
Claim 4
Dependent Claim
55 words
A binder as set forth in claim 1, wherein a prepolymer of molecular weight of from 300 to 1,200, manufactured by reaction of acrylic acid or methacrylic acid with a hydroxy compound, epoxy compound or isocyanate compound, mixed with a low molecular weight acrylic acid ester or N-vinyl compound, is used as olefinically unsaturated compound.
Claim 5
Dependent Claim
45 words
A binder as set forth in claim 1, wherein the prepolymer is an acrylic acid ester of an aliphatic or cycloaliphatic polyol, an epoxy-acrylate from a polyepoxide and acrylic acid or methacrylic acid, or a urethane-acrylate from a polyisocyanate and acrylic acid or methacrylic acid.
Claim 6
Dependent Claim
28 words
A binder as set forth in claim 1, wherein the olefinically unsaturated compounds are a mixture of prepolymers based on urethane acrylates, and copolymerizable epoxy-acrylates or N-divinyl compounds.
Claim 7
Dependent Claim
40 words
A binder as set forth in claim 1, wherein component (a) of the photoinitiator is a benzophenone substituted by halogen, halogenalkyl, alkyl or alkoxy, an o- or p-substituted benzophenonemonocarboxylic acid ester or a benzophenonedicarboxylic acid ester or benzophenonetetracarboxylic acid ester.
Claim 8
Dependent Claim
26 words
A binder as set forth in claim 1, wherein component (a) of the photoinitiator is an ester of o- or p-benzophenonecarboxylic acid and an epoxy resin.
Claim 9
Dependent Claim
24 words
A binder as set forth in claim 1, wherein the sensitizer (b) comprises a p-dimethylaminobenzoic acid ester of methanol, ethanol, propanol or a butanol.
Claim 10
Dependent Claim
29 words
A binder as set forth in claim 1, wherein the sensitizer (b) comprises a reaction product of p-dimethylaminobenzoic acid with an epoxy resin based on bisphenol A and epichlorohydrin.
Claim 11
Dependent Claim
42 words
A binder as set forth in claim 1, wherein a reaction product of an epoxy resin, of molecular weight less than 2,000, with from 40 to 96 mole percent of p-dimethylaminobenzoic acid per mole of epoxide groups, is used as sensitizer (b).
Claim 12
Dependent Claim
30 words
A binder as set forth in claim 1, wherein the photoinitiator is used in a total amount of from 1 to 30 percent by weight, based on the unpigmented binder.
Claim 13
Dependent Claim
31 words
A binder as set forth in claim 1, wherein the sensitizer (b) also includes Michler's ketone present in an amount of at most 2.5 percent by weight, based on unpigmented binder.
Claim 14
Dependent Claim
29 words
A binder as set forth in claim 1, wherein the photoinitiator component (a) and the photoinitiator component (b) are employed in a weight ratio of from 1:15 to 10:1.
Claim 15
Dependent Claim
27 words
A binder as set forth in claim 13, wherein about one aldehyde-carbonyl or ester-carbonyl group is employed per ketocarbonyl group in the benzophenone or benzophenone derivative (a).
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) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |