[특허]Photosensitive microcapsules containing a synthetic viscosity modifier in the continuous phase

Photosensitive microcapsules containing a synthetic viscosity modifier in the continuous phase 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G03F-007/033 G03F-007/09 B01J-013/02 B05D-007/00
출원번호	US-0099793 (2002-03-15)
발명자 / 주소	Katampe, Ibrahim Polykarpov, Alexander Y. Camillus, Joseph C.
출원인 / 주소	Eastman Kodak Company
인용정보	피인용 횟수 : 0 인용 특허 : 40

초록 ▼

A process for forming photosensitive microcapsules having discrete capsule walls comprising the steps of forming an emulsion of an oily core material in a continuous aqueous phase containing a carboxyvinyl polymer and enwrapping particles of the oily core material in an amine-formaldehyde condensation product produced by in situ condensation of an amine and formaldehyde wherein the carboxyvinyl polymer comprises a crosslinked polymer of acrylic acid is disclosed.

대표청구항 ▼

1. A process for forming photosensitive microcapsules having discrete capsule walls comprising the steps of forming an emulsion of an oily core material in a continuous aqueous phase comprising an aqueous solution of a carboxyvinyl polymer and enwrapping particles of said oily core material in an amine-formaldehyde condensation product produced by in situ condensation of an amine and formaldehyde wherein said carboxyvinyl polymer comprises a crosslinked polymer of acrylic acid.2. The process of claim 1 wherein said carboxyvinyl polymer is present in said aqueous phase in an amount of about 1.0 to 8% by weight based on the amount of water in the aqueous phase.3. The process of claim 2 wherein said carboxyvinyl polymer is present in said aqueous phase in an amount of about 2 to 4%.4. The process of claim 1 wherein said formaldehyde condensation product is a melamine-formaldehyde resin.5. The process of claim 1 wherein said carboxyvinyl polymer comprises a copolymer of acrylic acid and C10-C30 alkyl acrylate crosslinked with a crosslinking monomer selected from the group consisting of polyalkenyl ethers and divinyl glycol.6. The process of claim 5 wherein said crosslinking monomer is allylpentaerythritol.7. The process of claim 1 wherein said aqueous phase further contains a sulfonated polystyrene.8. The process of claim 1 wherein said microcapsules have an average particle size in a range from about 4 to 8 microns.9. The process of claim 8 wherein at least 90% of said microcapsules have a particle size less than 10 microns.10. The process of claim 9 wherein said microcapsules have an average particle size of about 5 microns.11. The process of claim 1 wherein said core material is a photopolymerizable composition.12. The process of claim 11 wherein said photopolymerizable composition contains an ethylenically unsaturated compound.13. An imaging sheet comprising a first support carrying on one surface thereof an imaging layer comprising an aqueous phase, a developer and microcapsules having discrete capsule walls, said microcapsules containing a radiation-sensitive material in the internal phase and containing an aqueous solution of a carboxyvinyl polymer as a viscosity modifier in the aqueous phase, said microcapsules being formed by enwrapping particles of an oil-in-water emulsion in a formaldehyde condensation product produced by in situ polymerization of formaldehyde and an amine, wherein said carboxyvinyl polymer comprises a crosslinked polymer of acrylic acid.14. The imaging sheet of claim 13 wherein said sheet further comprises a protective coating layer overlying said imaging layer.15. The imaging sheet of claim 13 further comprising a second support wherein said imaging layer is positioned between said supports.16. The imaging sheet of claim 13 wherein said formaldehyde condensation product is a melamine-formaldehyde resin.17. The imaging sheet of claim 13 wherein said carboxyvinyl polymer is present in said aqueous phase in an amount of about 1.0 to 8% by weight based on the amount of water in the aqueous phase.18. The imaging sheet of claim 13 wherein said carboxyvinyl polymer comprises a copolymer of acrylic acid and C10-C30 alkyl acrylate crosslinked with a crosslinking monomer selected from the group consisting of polyalkenyl ethers and divinyl glycol.19. The imaging sheet of claim 18 wherein said crosslinking monomer is allylpentaerythritol.20. Photosensitive microcapsules exhibiting improved sensitometric response under a range of humidity conditions, said microcapsules having discrete capsule walls and comprising an internal phase encapsulated in a continuous aqueous phase whereinsaid internal phase comprises a photohardenable composition and a color former; and said aqueous phase comprises an aqueous solution of a carboxyvinyl synthetic viscosity modifier comprising a crosslinked polymer of acrylic acid, wherein said photosensitive microcapsules provide substantially the same sensitometric response over a relative humidity range of from about 20% RH to 80% RH.

이 특허에 인용된 특허 (40)

Johnson Mark A. (Chillicothe OH) Pokora Alexander R. (Pickerington OH) Cyrus ; Jr. William L. (Ray OH), Biocatalytic oxidation using soybean and other legume peroxidases.
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Brown, Robert W.; Bowman, Richard P., Capsule manufacture.
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Shackle Dale Richard (Scottsboro AL), Cross-linked hydroxypropylcellulose microcapsules and process for making.
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Maubru Mireille,FRX, Direct capillary dyeing composition comprising a cross-linked polymer with acrylic and alkyl C.sub.10 -C.sub.30 acrylate units.
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Shanklin Michael S. (Miamisburg OH) Gottschalk Peter (Centerville OH), Dye branched-alkyl borate photoinitiators.
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Shanklin Michael S. (Dayton OH), Dye-benzyltriaryl borate photoinitiators and photohardenable composition containing these photoinitiators.
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Matsushita Toshihiko (Tokyo JPX) Morishita Sadao (Ushiku JPX), Image-receiving sheet for transfer recording.
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Yamamoto Soichiro (Kanagawa JPX) Ishikawa Shun-ichi (Shizuoka JPX) Shinozaki Fumiaki (Shizuoka JPX) Ohmatsu Hideki (Kanagawa JPX), Image-recording method comprising heating a light-sensitive material containing microcapsule.
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Polykarpov Alexander Y. ; Camillus Joseph C., Imaging system having opaque support.
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Jerry Roger E. (Bellbrook OH), Imaging system with integral cover sheet.
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Yamaguchi Jun (Shizuoka JPX) Washizu Shintaro (Shizuoka JPX) Matsumoto Hirotaka (Shizuoka JPX) Iwakura Ken (Shizuoka JPX) Fukushige Yuuichi (Shizuoka JPX), Light- and heat-sensitive recording material.
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Colyer E. Keith (Kettering OH) O\Connor Joseph G. (Springboro OH) Hammann ; IV W. A. (Centerville OH), Method for producing amino-formaldehyde microcapsules and photosensitive microcapsules produced thereby.
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Liang Rong-Chang (Centerville OH) Hipps ; Sr. Jesse (Dayton OH) Chen Jing-Den (Spring Valley OH), Method for producing microcapsules and photosensitive microcapsules produced thereby.
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Marabella Charles P. (Woodbury MN), Method for producing microcapsules and photosensitive microcapsules produced thereby.
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Katampe, Ibrahim; Camillus, Joseph C., Method for producing microcapsules having improved wall characteristics.
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Gottschalk Peter (Centerville OH) Schuster Gary B. (Champaign IL), Photohardenable compositions containing a dye borate complex and photosensitive materials employing the same.
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Gottschalk Peter (Centerville OH) Schuster Gary B. (Champaign IL), Photohardenable compositions containing a dye borate complex and photosensitive materials employing the same.
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Gottschalk Peter (Centerville OH) Schuster Gary B. (Champaign IL), Photohardenable compositions containing a dye-borate complex and photosensitive materials employing the same.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Photosensitive microcapsules containing a synthetic viscosity modifier in the continuous phase 원문보기

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Photosensitive microcapsules containing a synthetic viscosity modifier in the continuous phase 원문보기

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