摘要:
Copolymers containing the units A, B, C, D and optionally E are used to prepare radiation sensitive compositions and lithographic printing plates. The copolymer contains about 25 to 55 mol % of unit A which has the formula The copolymer contains about 0.5 to 25 mol % of unit B which has the formula wherein R1 is selected from the group consisting of alkyl, aryl and aralkyl. The copolymer contains about 0.5 to 40 mol % of unit C which has the formula wherein X is an aliphatic or aromatic spacer group, and Ac is an acidic group selected from the group consisting of —COOH, —SO3H, —SO2NR9R10 with R9 and R10 independently being selected from hydrogen and alkyl; and when X is phenylene, Ac can also be OH. The copolymer contains about 20 to 70 mol % of unit D which has the formula wherein Ci is selected from the group consisting of Ci-1, Ci-2, Ci-3 and Ci-4 which are represented by the following formulae wherein: k, m and n are integers independently selected from 0 to 5, R3, R4 and R7 are independently selected from the group consisting of alkyl, alkoxy, —COOR8, —NR9R10, —NH—CO—CH3, halogen, and cyano, R8 is selected from hydrogen and alkyl, R9 and R10 are independently selected from hydrogen and alkyl, R5 is selected from the group consisting of hydrogen, alkyl, aryl and aralkyl, R6 is selected from the group consisting of alkyl, aryl and aralkyl and Y is selected from the group consisting of alkylene, arylene and arylenealkylene. The copolymer contains about 0 to 50 mol % of unit E which has the formula wherein R2 is selected from the group consisting of alkyl, aryl and aralkyl groups.
摘要:
A beam combining device for combining light from a first light source and light from a second light source of a light-source device for a medical apparatus includes a body made of a transparent material, a face which reflects in at least either a dichroic or polarization-dependent manner and is situated in or on the body, which face is transparent to light having a first spectrum or a first polarization and reflects light having a second spectrum or a second polarization, and a light-entrance face on the body, which light-entrance face is provided and arranged so that light enters the beam combining device through the light-entrance face. At least either the light-entrance face or the face reflecting in a dichroic or polarization-dependent manner is curved.
摘要:
A negative-working lithographic printing plate precursor comprises a negative-working radiation-sensitive imageable layer and an outermost layer comprising a vinyl alcohol copolymer comprising at least one unit of each of the (a), (b), and (c) recurring units, in any order, defined in the disclosure. The (c) recurring units are present in the vinyl alcohol copolymer in an amount of at least 0.5 mol %, based on the total recurring units. These precursors can be used to prepare lithographic printing plates either on-press or off-press after imaging using near-UV, visible, or infrared radiation.
摘要:
A lithographic printing plate precursor comprises an imageable layer comprising a free radically polymerizable component, an initiator composition capable of generating free radicals upon exposure to imaging infrared radiation, an infrared radiation absorbing dye that is defined by Structure (I) shown in the disclosure, which dyes comprise one or more ethylenically unsaturated polymerizable groups in an organic group that is attached to the methine chain. These infrared radiation absorbing dyes exhibit a reduced tendency to crystallize in the imageable layers in the presence of tetraaryl borate counter anions and therefore provide improved shelf life.
摘要:
A method is described for producing an imaged lithographic printing plate, wherein the developer comprises a hydrophilic polymer comprising (m1) structural units derived from at least one compound comprising both a polyalkylene oxide chain and a free radical polymerizable group, and (m2) structural units derived from at least one compound copolymerizable with the free radical polymerizable group of (i) and comprising at least one functional group with pKs
摘要:
Negative-working imageable elements can be imaged and processed to provide lithographic printing plates. These imageable elements are sensitive to infrared radiation but are insensitive to “white” light and thus can be more easily handled under white light conditions. These properties are possible by incorporating a filter dye having a λmax of from about 300 to about 500 nm into the imageable layer of the imageable elements.
摘要:
A medical instrument includes a housing with an aperture, a window component that comprises a transparent material and closes off the aperture, and a thin-walled area that surrounds the aperture.
摘要:
A backside coating is applied to lithographic printing plate precursors and this coating provides sufficient protection so that adjacent precursors are not scratched or otherwise damaged when stacked. The backside coating is readily dissolved during processing or development at a pH of at least 6.5 after the precursors are imaged.
摘要:
Negative-working imageable elements are prepared with radiation-sensitive imageable layers that contain surface-modified silica particles such as fumed silica particles and sol-gel silica particles, that are present in an amount of from about 1 to about 40 weight %, have an average particle size of from about 1 to about 500 nm, have surface hydroxy groups, and have a carbon content of from about 0.5 to about 15 weight % that is derived from surface hydrophobic groups having 1 to 30 carbon atoms. The presence of the surface-modified silica particles provides improved abrasion resistance, reduced tackiness, and various other desired properties.
摘要:
Process for the production of a lithographic printing plate, comprising (a) providing a lithographic printing plate precursor comprising (i) a substrate; (ii) a radiation-sensitive coating comprising one or more layers and (iii) optionally an oxygen-impermeable overcoat; (b) image-wise exposing the lithographic printing plate precursor to radiation of a wavelength to which the radiation-sensitive coating is sensitive; (c) optionally subjecting the image-wise exposed precursor to a preheat treatment and/or rinsing with water; (d) removing the non-image areas from the image-wise exposed precursor by means of an alkaline developer solution; (e) optionally subjecting the imaged precursor obtained in step (d) to rinsing with water; (f) treating the imaged lithographic printing plate obtained in step (d) or (e) with a finisher solution; and (g) optionally subjecting the finisher treated plate obtained in step (f) to at least one further process step selected from rinsing with water, drying and baking; characterized in that the finisher solution comprises 0.01 to 15 wt. %, based on the total weight of the finisher, of a hydrophilic polymer comprising: (m1) primary, secondary and/or tertiary amino groups, and (m2) acid groups selected from —COOH, —SO3H, —PO2H2 and PO3H2, and (m3) optionally alkylene oxide units —(CHR1—CH2—O)P—, wherein each R1 independently represents H or —CH3 and p is an integer from 1 to 50.