A lithographic printing plate precursor including a photopolymerisable coating and an overcoat layer provided on top of said layer, characterized in that the overcoat layer includes a compound comprising at least one moiety having a structure according to Formula (I): (I).
SYNTHESES, NMR STUDY AND STEREOCHEMISTRY OF NEW P-H TRICYCLOPHOSPHORANES
作者:Margarita Tlahuextl、Martínez-martínez、María De Jesús Rosales-Hoz、Rosalinda Contreras
DOI:10.1080/10426509708044194
日期:1997.4.1
Abstract Four new tricyclophosphoranes 1b-4b were synthesized derived from N,N′-bis[2-hydroxy phenyl]ethylenediamine (1a), N,N′-bis[2-hydroxyphenyl]oxamide (a), N,N′-bis[(-)-norephedrinelethylene (3a), N,N′-bis[(-)-norpseudoephedrine]oxalyl (4a), The syntheses of compounds 3b and 4b were completely stereoselective giving only one epimer in each case (epimer helix Δ, 3b; helix Λ, 4b). For both the phosphorus
Sterically (un)encumbered mer-tridentate N-heterocyclic carbene complexes of titanium(<scp>iv</scp>) for the copolymerization of cyclohexene oxide with CO<sub>2</sub>
作者:Julie Hessevik、Ralte Lalrempuia、Hajar Nsiri、Karl W. Törnroos、Vidar R. Jensen、Erwan Le Roux
DOI:10.1039/c6dt01706a
日期:——
Titanium(IV) complexes bearing an unsubstituted tridentate bis(phenolate) N-heterocyclic carbene (NHC) were synthesized and structurally identified. While sterically unencumbered NHC–Ti(IV) complexes bearing chloro and alkoxy co-ligands tend to dimerize in solution and in solid-state, the use of a bulky aryloxy as co-ligand favors the monomeric species. Upon activation by onium salts, all these complexes
合成并结构鉴定了带有未取代的三齿双(酚盐)N-杂环卡宾(NHC)的钛(IV)配合物。尽管带有氯和烷氧基共配体的空间不受阻碍的NHC-Ti(IV)配合物在溶液和固态下趋于二聚,但使用大体积的芳氧基作为共配体有利于单体种类。通过鎓盐活化后,发现所有这些络合物对环己烯氧化物(CHO)与CO 2在温和条件下(P CO 2 <1 bar)的共聚具有高度选择性,尽管在空间上不受阻碍的NHC-Ti(IV)络合物与带有较大取代基的结构类似物相比,它们的稳定性和活性较差。
STRETCHED POLYSTYRENE FILM AND PROCESS FOR THE PREPARATION OF STRECHTED POLYSTYRENE FILM
申请人:IDEMITSU PETROCHEMICAL CO., LTD.
公开号:EP0742246A1
公开(公告)日:1996-11-13
There are disclosed a polystyrenic stretched film which comprises a styrenic resin composition containing 70 to 100 % by weight of a styrenic polymer having a high degree of the syndiotactic configuration, has a crystallinity of 35 % or more, and contains 200 ppm or less of residual monomer components and 1000 or less of particles of foreign substances having a size of 9 µm or larger in 1 cm3, and a process for producing the polystyrenic stretched film which comprises extruding the styrenic resin composition in a specific amount in combination with melt filtration of the composition, cooling the extruded composition, biaxially stretching the cooled composition, and heat treating the stretched composition under the condition that the degree of heat treatment is 1 × 10-1 or more and less than 5 × 102.
According to the present invention, a stretched film having excellent printing property and other properties, such as a high peeling strength after vapor deposition, and a process for efficiently producing the polystyrenic stretched film having the excellent properties are provided.
POLYSTYRENE RESIN COMPOSITION AND ORIENTED POLYSTYRENE FILM
申请人:IDEMITSU PETROCHEMICAL CO., LTD.
公开号:EP0747432A1
公开(公告)日:1996-12-11
The present invention relates to a styrenic resin composition which comprises 90 to 99.99% by weight of a styrenic polymer having a high degree of syndiotctic configuration (SPS) and 0.01 to 10% by weight of a spherical aluminosilicate having pH in the range of 5 to 11; a polystyrene oriented film which comprises the above styrenic resin composition molded into an oriented film; a styrenic resin composition which comprises 99.2 to 99.95% by weight of a styrenic polymer having a high degree of syndiotactic configuration and 0.05 to 0.8% by weight of a spherical regular elastomer having an average grain size in the range of 0.1 to 3 µm, and which has a melt index at 300°C under 2.16kg load being in the range of 1 to 50; and a polystyrene oriented film which comprises the asbove styrenic resin composition molded into an oriented film. According to the present invention, there are provided styrenic resin compositions each being excellent in melt-heat-stability, minimized in the generation of white powders at the time of continuous film forming and capable of producing oriented films that are favorable in slipperiness, dielectric breakdown voltage (AC), tear strength and the like; and polystyrene oriented films useful as a variety of base materials for films.