US4478977A
Expired / Lapsed
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Photopolymer derivatives of polyvinyl alcohol
Assignee: MacDermid Autotype Ltd
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Filing: 1983-03-15
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Granted: 1984-10-23
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Expires: 2003-03-15
Abstract
Abstract Photopolymers which are derivatives of polyvinyl alcohol and are useful as resists, stencils and relief images are made by reacting a compound having one or two formyl or acetal groups, such as terephthaldehyde, a naphthalene dialdehyde or the reaction product of an acetal and hydroxy-benzaldehyde, with an aromatic or heterocyclic compound carrying an acetyl group, so as to produce an intermediate of the formula: ##STR1## and reacting this with a polyvinyl alcohol to yield a photosensitive product of the formula: ##STR2## wherein m is 0 or 1, n is an integer from 1 to 6, X is an aromatic or heterocyclic group carrying at least one polar group and Z is an aromatic group of the formula: ##STR3## wherein R' and R", when both are present, are the same or different and each represents a hydrogen or a halogen atom or an alkyl, alkoxy, hydroxyalkyl, hydroxy, nitro or cyano group.
Inventors
- 👤 John A. Sperry
- 👤 Dennis D. Maguire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:15
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/0388; C; C08; C08F; C08F8/00; C08F8/48; C08J; C08J5/00; C08J5/18
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
86 words
A photopolymer, characterized by comprising a polyvinyl alcohol derivative which incorporates a constituent of the formula: ##STR16## wherein m is 0 or 1, n is an integer from 1 to 6, X is an aromatic or heterocyclic group carrying at least one polar group and Z is an aromatic group of the formula: ##STR17## wherein R' and R", when both are present, are the same or different and each represents a hydrogen or a halogen atom or an alkyl, alkoxy, hydroxyalkyl, hydroxy, nitro or cyano group.
Claim 2
Dependent Claim
86 words
A photopolymer, characterized by comprising a polyvinyl alcohol derivative which incorporates a constituent of the formula: ##STR16## wherein m is 0 or 1, n is an integer from 1 to 6, X is an aromatic or heterocyclic group carrying at least one polar group and Z is an aromatic group of the formula: ##STR17## wherein R' and R", when both are present, are the same or different and each represents a hydrogen or a halogen atom or an alkyl, alkoxy, hydroxyalkyl, hydroxy, nitro or cyano group.
Claim 3
Dependent Claim
24 words
A photopolymer according to claim 1, which is capable of absorbing light of a wavelength in the range from 320 nm to 500 nm.
Claim 4
Dependent Claim
40 words
A photopolymer according to claim 1, wherein the polar group in X is selected from carboxylic acids and their salts, sulphonic acids and their salts and primary, secondary and tertiary amines and their salts, including quaternary salts of tertiary amines.
Claim 5
Dependent Claim
35 words
A photopolymer according to claim 3, wherein X is selected from structures of the formulae: ##STR18## wherein R'" represents a hydrogen atom or an alkyl or hydroxyalkyl group and Y is a strong acid anion.
Claim 6
Dependent Claim
28 words
A photopolymer according to claim 1, wherein m is 0, X is a benzenesulphonic group or a salt thereof and R' and R" each represent a hydrogen atom.
Claim 7
Dependent Claim
28 words
A photopolymer according to claim 1, wherein m is 1, X is a benzenesulphonic group or a salt thereof and R' and R" each represent a hydrogen atom.
Claim 8
Dependent Claim
29 words
A photopolymer according to claim 1, wherein m is 1, X is a pyridyl group or a quaternary salt thereof and R' and R" each represent a hydrogen atom.
Claim 9
Dependent Claim
45 words
A photopolymer according to claim 1, which is the product of reaction of a polyvinyl alcohol with an intermediate of the general formula: ##STR19## wherein Y is a formyl or acetal group and Z, X, n and m have the meanings defined in claim 1.
Claim 10
Dependent Claim
28 words
A photopolymer according to claim 8, which has been prepared from a reaction mixture which also contains one or more non-light-sensitive modifier compounds containing formyl or acetal groups.
Claim 11
Dependent Claim
18 words
A photopolymer according to claim 9, wherein the modifier compound is selected from acetaldehyde, acetaldehyde-dimethyl-acetal, chloral and chloracetaldehyde-dimethyl-acetal.
Claim 12
Dependent Claim
73 words
A process of preparation of a photopolymer of formula (1) as defined in claim 1, characterized in that a compound of the formula: ##STR20## wherein Y represents a formyl or acetal group and Z, n and m have the meanings defined in claim 1, is reacted with a compound of the formula: ##STR21## wherein X has the meaning defined in claim 1, and the product is condensed under acid conditions with polyvinyl alcohol.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1987-10-23 | 1988-04-23 | 1988-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-23 | 1992-04-23 | 1992-10-23 | $3760.00 | Window Closed / Lapsed |
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