US5061603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photocurable compositions
Assignee: Sericol Ltd
•
Filing: 1989-12-12
•
Granted: 1991-10-29
•
Expires: 2009-12-12
Abstract
Abstract Photopolymerizable polyvinyl alcohols including a group of formula ##STR1## wherein R 1 represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, or a hydrogen atom; R 2 represents a substituted or unsubstituted alkyl group, a primary, secondary or tertiary amino group, a cyano, hydroxy or nitro group, a halogen or hydrogen atom or, together with the pyridine ring to which it is attached, part of a quinolyl group; R 3 represents a chlorine or hydrogen atom or, together with the benzene ring to which it is attached, part of a naphthyl group; and X - represents an anion, and photocurable compositions for producing screen printing stencils including such polyvinyl alcohol derivatives. Compositions of the invention show high light sensitivity with low levels of photocrosslinkable groups grafted to the polyvinyl alcohol.
Inventors
- 👤 John Hamilton
- 👤 Peter Dickinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:46
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/89; G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/032; G03F7/033; G03F7/038; G03F7/0388; G03F7/09; G03F7/105
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
104 words
Photopolymerisable grafted polyvinyl alcohol including grafted thereto groups of formula ##STR3## wherein R 1 represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aralkyl group; R 2 represents a substituted or unsubstituted alkyl group, a primary, secondary or tertiary amino group, a cyano group, a hydroxy group, a nitro group, a halogen or hydrogen atom or, together with the pyridine ring to which it is attached, part of a quinolyl group; R 3 represents a chlorine or hydrogen atom or, together with the benzene ring to which it is attached, part of a naphthyl gruop; and X - represents an anion.
Claim 2
Dependent Claim
104 words
Photopolymerisable grafted polyvinyl alcohol including grafted thereto groups of formula ##STR3## wherein R 1 represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aralkyl group; R 2 represents a substituted or unsubstituted alkyl group, a primary, secondary or tertiary amino group, a cyano group, a hydroxy group, a nitro group, a halogen or hydrogen atom or, together with the pyridine ring to which it is attached, part of a quinolyl group; R 3 represents a chlorine or hydrogen atom or, together with the benzene ring to which it is attached, part of a naphthyl gruop; and X - represents an anion.
Claim 3
Dependent Claim
15 words
Photopolymerisable grafted polyvinyl alcohol according to claim 1, wherein R 1 represents a methyl group.
Claim 4
Dependent Claim
15 words
Photopolymerisable grafted polyvinyl alcohol according to claim 1, wherein R 2 represents a hydrogen atom.
Claim 5
Dependent Claim
15 words
Photopolymerisable grafted polyvinyl alcohol according to claim 1, wherein R 3 represents a hydrogen atom.
Claim 6
Dependent Claim
18 words
Photopolymerisable grafted polyvinyl alcohol according to claim 1, wherein the group of formula I is a N-methoxy-4-styrylpyridinium group.
Claim 7
Dependent Claim
24 words
Photopolymerisable grafted polyvinyl alcohol according to claim 1, wherein the group of formula I is grafted to the polyvinyl alcohol by an acetal group.
Claim 8
Dependent Claim
31 words
Photopolymerisable grafted polyvinyl alcohol according to claim 1, wherein the group of formula I is grafted to the polyvinyl alcohol through the 4-position of the benzene ring of the styryl group.
Claim 9
Dependent Claim
27 words
Photopolymerisable grafted polyvinyl alcohol according to claim 1, wherein up to 20% of the hydroxy groups of the polyvinyl alcohol have groups of formula I grafted thereto.
Claim 10
Dependent Claim
26 words
Photopolymerisable grafted polyvinyl alcohol according to claim 1, wherein the polyvinyl alcohol is hydrolysed polyvinyl acetate with a degree of hydrolysis of from 72 to 99%.
Claim 11
Dependent Claim
19 words
Compositions for producing screens for screen printing, the compositions comprising a photocurable grafted polyvinyl alcohol according to claim 1.
Claim 12
Dependent Claim
16 words
Compositions according to claim 10, containing up to 30% by weight of the grafted polyvinyl alcohol.
Claim 13
Dependent Claim
8 words
Compositions according to claim 10, containing a filler.
Claim 14
Dependent Claim
10 words
Compositions according to claim 10, containing a photopolymerisable, ethylenically-unsaturated compound.
Claim 15
Dependent Claim
8 words
Compositions according to claim 10, containing eosin Y.
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) | 1994-10-28 | 1995-04-29 | 1995-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-28 | 1999-04-29 | 1999-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-28 | 2003-04-29 | 2003-10-29 | $7700.00 | Window Closed / Lapsed |