US4683190A
Expired / Lapsed
US
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Process to lower the viscosity of coating solutions for the production of light-sensitive reproduction materials
Assignee: EIDP Inc
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Filing: 1985-12-18
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Granted: 1987-07-28
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Expires: 2005-12-18
Abstract
Abstract Process for lowering the viscosity of coating solutions containing a thixotropy-causing filler for the production of light-sensitive reproduction materials by adding at least one compound corresponding to one of the following formulas: ##STR1## wherein R is a linear saturated or unsaturated hydrocarbon chain having 2 to 12 carbon atoms, optionally substituted in which one or more carbon atoms can be replaced by N(R 5 ), O, S, and/or an aromatic radial, or a 5 to 8 membered aliphatic ring. R 1 to R 4 are H, alkyl, aryl, and aralkyl, whereby R 1 to R 4 can be the same or different; R 5 is R 1 to R 4 ; R 6 and R 7 are R 1 to R 4 , --(CHR 8 ) p --OH; p is 1 to 6; q and r are 1 to 6 and can be the same or different; R 8 is H, alkyl; R 9 and R 10 are H, alkyl, --(CHR 8 ) p --OH.
Inventors
- 👤 Manfred A. J. Sondergeld
- 👤 Dietmar Dudek
- 👤 Klaus Hossner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:55
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
359 words
A process to lower the viscosity of coating solutions for the production of light-sensitive reproduction materials comprising (A) dissolving in a mixture of solvents a mixture comprising the constituents: (1) at least one polymeric binder containing salt-forming groups in an amount of 20 to 90% by weight based on the total constituents of the coating less any solvents present, and (2) at least one light-sensitive compound that, when exposed to actinic radiation in the form of a layer, changes the solubility, tackiness, or adhesion of the light-sensitive layer taken from the group consisting of light-curing systems of the addition polymerizable and photocrosslinkable types and photosoluble systems, and (B) adding to the solvent mixture (3) at least one thixotropy-causing filler which is a silicic acid having silanol groups present at least partially in free form and an SiO 2 content greater than 70% by weight in an amont of up to 15% by weight of thixotropy-causing filler relative to the solids content of a dried layer, and (4) at least one amine-containing compound to lower the viscosity of the coating solution, said amine-containing compound being of the following formulas ##STR3## wherein R is a linear saturated or unsaturated hydrocarbon chain having 2 to 12 carbon atoms in which one or more carbon atoms can be replaced by N(R 5 ) O, S, and/or an aromatic radical, or a 5 to 8 membered aliphatic ring; R 1 to R 4 are H, alkyl, aryl, and aralkyl, whereby R 1 to R 4 can be the same or different; R 5 is R 1 to R 4 ; R 6 and R 7 are R 1 to R 4 , --(CHR 8 ) p --OH; p is 1 to 6; q and r are 1 to 6 and can be the same or different; R 8 is H, alkyl; R 9 and R 10 are H, alkyl, --(CHR 8 ) p --OH, the at least one amine-containing compound being present in an amount of 0.01 to 5% by weight relative to the solids content of a dried layer and being added to the coating solution before or after adding the thixotropy-causing filler.
Claim 2
Dependent Claim
359 words
A process to lower the viscosity of coating solutions for the production of light-sensitive reproduction materials comprising (A) dissolving in a mixture of solvents a mixture comprising the constituents: (1) at least one polymeric binder containing salt-forming groups in an amount of 20 to 90% by weight based on the total constituents of the coating less any solvents present, and (2) at least one light-sensitive compound that, when exposed to actinic radiation in the form of a layer, changes the solubility, tackiness, or adhesion of the light-sensitive layer taken from the group consisting of light-curing systems of the addition polymerizable and photocrosslinkable types and photosoluble systems, and (B) adding to the solvent mixture (3) at least one thixotropy-causing filler which is a silicic acid having silanol groups present at least partially in free form and an SiO 2 content greater than 70% by weight in an amont of up to 15% by weight of thixotropy-causing filler relative to the solids content of a dried layer, and (4) at least one amine-containing compound to lower the viscosity of the coating solution, said amine-containing compound being of the following formulas ##STR3## wherein R is a linear saturated or unsaturated hydrocarbon chain having 2 to 12 carbon atoms in which one or more carbon atoms can be replaced by N(R 5 ) O, S, and/or an aromatic radical, or a 5 to 8 membered aliphatic ring; R 1 to R 4 are H, alkyl, aryl, and aralkyl, whereby R 1 to R 4 can be the same or different; R 5 is R 1 to R 4 ; R 6 and R 7 are R 1 to R 4 , --(CHR 8 ) p --OH; p is 1 to 6; q and r are 1 to 6 and can be the same or different; R 8 is H, alkyl; R 9 and R 10 are H, alkyl, --(CHR 8 ) p --OH, the at least one amine-containing compound being present in an amount of 0.01 to 5% by weight relative to the solids content of a dried layer and being added to the coating solution before or after adding the thixotropy-causing filler.
Claim 3
Dependent Claim
19 words
A process according to claim 1 wherein the mixture of solvents is a mixture of methylene chloride and methanol.
Claim 4
Dependent Claim
31 words
A process according to claim 1 wherein the amine-containing compound is an aliphatic amine having at least 2 amino groups and a saturated hydrocarbon chain with 2 to 6 carbon atoms.
Claim 5
Dependent Claim
19 words
A process according to claim 1 wherein the amine-containing compound is 1,2-diaminoethane, N-ethyl-1,2-diaminoethane, N,N'-diethyl-1,2-diaminoethane, 1,6-diaminohexane or a mixture thereof.
Claim 6
Dependent Claim
18 words
A process according to claim 1, wherein the amine-containing is a mono-, bis-, tris-(2-hydroxyethyl)-amine or a mixture thereof.
Claim 7
Dependent Claim
57 words
A process according to claim 1 wherein pyrogenic silicic acid having silanol groups present at least partially in free from, an SiO 2 content greater than 70% by weight, a surface according to BET of between 50 and 400 m 2 /g, and an average primary particle size of 7-50 nm, is present as the thixotrophy-causing filler.
Claim 8
Dependent Claim
24 words
A process according to claim 1 wherein a photoinitiator or a photoinitiator system is present as one of the constituents of the solvent mixture.
Claim 9
Dependent Claim
18 words
A process according to claim 7 wherein the light-sensitive compound is at least one photopolymerizable ethylenically unsaturated compound.
Claim 10
Dependent Claim
51 words
A process according to claim 1 wherein R is a substituted linear saturated or unsaturated hydrocarbon chain having 2 to 12 carbon atoms in which one or more carbon atoms can be replaced by N(R 5 ), O, S, and/or an aromatic radial, or a 5 to 8 membered aliphatic ring.
Claim 11
Dependent Claim
12 words
A process according to claim 3 wherein the amino groups are substituted.
Claim 12
Dependent Claim
20 words
A process according to claim 1 wherein the amine-containing compound is added to the coating solution before the thixotrophy-causing filler.
Claim 13
Dependent Claim
20 words
A process according to claim 1 wherein the amine-containing compound is added to the coating solution after the thixotrophy-causing filler.
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) | 1990-07-27 | 1991-01-26 | 1991-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-27 | 1995-01-26 | 1995-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-27 | 1999-01-26 | 1999-07-28 | $7700.00 | Window Closed / Lapsed |