Claims
- 1. A process for curing ethylenically unsaturated polymerisable compounds, which comprises adding to said compounds at least one photoinitiator of formula I ##STR7## wherein R.sub.1 is C.sub.1 -C.sub.12 alkyl, cyclopentyl, cyclohexyl, unsubstituted phenyl, naphthyl or biphenyl,
- R.sub.2 and R.sub.3 are each independently of the other C.sub.1 -C.sub.12 alkyl,
- R.sub.4 is hydrogen or C.sub.1 -C.sub.12 alkyl, and
- R.sub.5 is hydrogen or methyl,
- and irradiating the mixture so obtained with daylight or with light sources equivalent to daylight.
- 2. A process according to claim 1, wherein R.sub.1 in the compound of formula I is C.sub.2 -C.sub.10 alkyl, cyclopentyl, cyclohexyl or phenyl.
- 3. A process according to claim 2, wherein R.sub.1 in the compound of formula I is C.sub.3 -C.sub.8 alkyl, cyclopentyl, cyclohexyl or phenyl.
- 4. A process according to claim 1, wherein R.sub.1 in the compound of formula I is C.sub.4 -C.sub.12 alkyl, cyclopentyl or cyclohexyl, R.sub.2 and R.sub.3 are each independently of the other C.sub.1 -C.sub.12 alkyl and R.sub.4 is hydrogen or C.sub.1 -C.sub.12 alkyl.
- 5. A process according to claim 1, wherein R.sub.2 and R.sub.3 in the compound of formula I are C.sub.1 -C.sub.4 alkyl and R.sub.4 is hydrogen or C.sub.1 -C.sub.4 alkyl.
- 6. A process according to claim 5, wherein R.sub.2, R.sub.3 and R.sub.4 in the compound of formula I are methyl and R.sub.5 is hydrogen.
- 7. A process according to claim 1, wherein R.sub.1 in the compound of formula I is C.sub.3 -C.sub.8 alkyl.
- 8. A process according to claim 7, wherein R.sub.1 in the compound of formula I is isobutyl.
- 9. A process according to claim 1, wherein R.sub.1 in the compound of formula I is phenyl.
- 10. A process according to claim 1, wherein the ethylenically unsaturated polymerisable compounds are a mixture of (i) at least one oligomeric compound and (ii) at least one monomer.
- 11. A process according to claim 10, wherein the ethylenically unsaturated polymerisable compounds are a mixture of (i) unsaturated polyesters and (ii) acrylates, methacrylates and/or styrene.
- 12. A process according to claim 11, wherein the ethylenically unsaturated polymerisable compounds are a mixture of (i) unsaturated polyesters and (ii) acrylates and/or methacrylates.
- 13. A process according to claim 11, wherein the unsaturated polyesters (i) are prepared from maleic acid, fumaric acid and/or phthalic acid and one or more than one diol, and have molecular weights of 500 to 3000.
- 14. A process according to claim 10, wherein the ethylenically unsaturated polymerisable compounds are a mixture of (i) polyester acrylates and (ii) acrylates and/or methacrylates.
- 15. A process according to claim 1, wherein the ethylenically unsaturated polymerisable compounds are dissolved or emulsified in water.
- 16. A process according to claim 1, wherein the photoinitiator is used in an amount of 0.05 to 15% by weight, preferably 0.2 to 5% by weight.
- 17. A process according to claim 1, wherein other photoinitiators and/or other additives are used in addition to the photoinitiator of formula (I).
- 18. A composition comprising
- (A) at least one ethylenically unsaturated polymerisable compound, and
- (B) at least one photoinitiatior of formula I,
- which composition is curable by irradiation with daylight or with light sources equivalent to daylight.
- 19. A process for coating surfaces, which comprises applying a composition as claimed in claim 18 to said surface and curing the layer by irradiation with daylight or with light sources equivalent to daylight.
Priority Claims (1)
Number |
Date |
Country |
Kind |
816/93 |
Mar 1993 |
CHX |
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Parent Case Info
This application is a continuation of application Ser. No. 08/212,524, filed Mar. 11, 1994, now abandoned.
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Number |
Name |
Date |
Kind |
4737593 |
Ellrich et al. |
Apr 1988 |
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4792632 |
Ellrich et al. |
Dec 1988 |
|
5218009 |
Rutsch et al. |
Jun 1993 |
|
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Number |
Date |
Country |
0160723 |
Nov 1985 |
EPX |
0184095 |
Jun 1986 |
EPX |
4231579 |
Mar 1993 |
DEX |
04239508 |
Aug 1992 |
JPX |
2259704 |
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GBX |
Non-Patent Literature Citations (2)
Entry |
Research Disclosure, (1993) No. 350, Emsworth, GB. |
Derwent Abstract 85-284454/46. |
Continuations (1)
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Number |
Date |
Country |
Parent |
212524 |
Mar 1994 |
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