US4409313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder deposition to form pattern on light imaged photosensitive diazonium salt coating having salt of aromatic amine
Assignee: Hitachi Ltd
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Filing: 1982-09-29
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Granted: 1983-10-11
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Expires: 2002-09-29
Abstract
Abstract A photosensitive composition improved in sensitivity by adding a salt of a compound represented by the general formula: ##STR1## (wherein R 1 and R 2 each represents a straight chain alkyl group, and X, Y and Z each represents H, a straight chain alkyl group or an alkoxy group, but two or more of X, Y and Z can not be H at the same time) to an aromatic diazonium salt which gets sticky upon exposure to light.
Inventors
- 👤 Hajime Morishita
- 👤 Takahiro Kohashi
- 👤 Saburo Nonogaki
- 👤 Motoo Akagi
- 👤 Nobuaki Hayashi
- 👤 Shoichi Uchino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:11
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/016; G03F7/0166; G03C; G03C5/00; H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/22
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
134 words
A process for forming a pattern of powder coat layer comprising the steps of coating a substrate with a photosensitive composition containing an aromatic diazonium salt which gets sticky upon exposure to light and a salt of a compound represented by the general formula: ##STR11## (wherein R 1 and R 2 each represents a straight chain alkyl group, and X, Y and Z each represents H, a straight chain alkyl group or an alkoxy group, but two or more of X, Y and Z can not be H at the same time) to form a thin coat layer on said substrate, subjecting said thin layer to pattern light exposure to make the exposed part sticky, and contacting the powder particles with the exposed thin layer to have the powder deposited on the exposed part.
Claim 2
Dependent Claim
134 words
A process for forming a pattern of powder coat layer comprising the steps of coating a substrate with a photosensitive composition containing an aromatic diazonium salt which gets sticky upon exposure to light and a salt of a compound represented by the general formula: ##STR11## (wherein R 1 and R 2 each represents a straight chain alkyl group, and X, Y and Z each represents H, a straight chain alkyl group or an alkoxy group, but two or more of X, Y and Z can not be H at the same time) to form a thin coat layer on said substrate, subjecting said thin layer to pattern light exposure to make the exposed part sticky, and contacting the powder particles with the exposed thin layer to have the powder deposited on the exposed part.
Claim 3
Dependent Claim
35 words
The process according to claim 1, wherein the amount of a salt of a compound represented by the above-shown general formula is within the range of 300-1% by weight based on the aromatic diazonium salt.
Claim 4
Dependent Claim
31 words
The process according to claim 1, wherein R 1 and R 2 in the above shown general formula are each a straight chain alkyl group having two or less carbon atoms.
Claim 5
Dependent Claim
22 words
The process according to claim 3, wherein R 1 and R 2 in the above-shown general formula are each a methyl group.
Claim 6
Dependent Claim
37 words
The process according to any of claims 1 to 4, wherein the straight chain alkyl group represented by one or more of X, Y and Z in the above-shown general formula has two or less carbon atoms.
Claim 7
Dependent Claim
35 words
The process according to any of claims 1 to 4, wherein the alkoxy group represented by one or more of X, Y and Z in the above-shown general formula has two or less carbon atoms.
Claim 8
Dependent Claim
29 words
The process according to any of claims 1 to 4, wherein the salt of a compound represented by the above-shown general formula is a hydrochloride zinc chloride double salt.
Claim 9
Dependent Claim
45 words
The process according to any of claims 1 to 4, wherein the salt of a compound represented by the above-shown general formula is a salt of at least one compound selected from the group consisting of 2,6-dimethyl-N,N-dimethylaniline, 3,5-dimethyl-N,N-dimethylaniline, 2,4,6-trimethyl-N,N-dimethylaniline, 2,6-diethyl-N,N-dimethylaniline, 3-methoxy-2,6-dimethyl-N,N-dimethylaniline, 3-ethoxy-2,6-dimethyl-N,N-dimethylaniline, 4-methoxy-2,6-dimethyl-N,N-dimethylaniline and 4-ethoxy-2,6-dimethyl-N,N-dimethylaniline.
Claim 10
Dependent Claim
25 words
The process according to claim 8, wherein the salt of a compound represented by the above-shown general formula is a hydrochloride zinc chloride double salt.
Claim 11
Dependent Claim
36 words
The process according to any of claims 1 to 4, wherein said photosensitive composition further contains an organic polymer compound in an amount within the range of 0.5-500% by weight based on the aromatic diazonium salt.
Claim 12
Dependent Claim
45 words
The process according to claim 10, wherein the organic polymer compound is at least one member selected from the group consisting of gum arabic, polyvinyl alcohol, polyacrylamide, poly-N-vinylpyrrolidone, hydroxypropylmethyl cellulose, alginic acid, propylene glycol ester of alginic acid, acrylamide-diacetoacrylamide copolymer and methylvinyl ether-maleic anhydride copolymer.
Claim 13
Dependent Claim
19 words
The process according to any of claims 1 to 4, wherein the thin layer of photosensitive composition is crystalline.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |