摘要:
A catalyst composition for the preparation of 3-pentenoic ester from butadiene. The catalyst composition includes a palladium complex; and a bidentate phosphine with the following formula: .sub.1 R.sub.2 P--(CH.sub.2)n--PR.sub.3 R.sub.4, wherein n is a integer from 1 to 6; and a bulky benzoic carboxylic acid.
摘要:
The present invention discloses an improved catalyst composition for preparing 5-formylvalerate esters by hydroformylation of pentenoic esters monoxide with good activity, high selectivity in the presence of hydrogen and carbon.
摘要:
The present invention provides a graft copolymer of a syndiotactic styrene/para-alkylstyrene copolymer, having the formula of wherein R1 and R2 are independently selected from the group consisting of hydrogen, alkyl, and primary and secondary haloalkyl; X is a functional group selected from a group containing halogen, oxygen, sulfur, silicon, nitrogen, carbon, phosphorus, and mixtures thereof; Y is an atactic polymer moiety; a ranges from 10 to 30000; b ranges from 0 to 30000; c ranges from 0 to 30000; and d ranges from 1 to 30000. The compatibility of the graft copolymer of syndiotactic styrene/para-alkylstyrene copolymer of the present invention with other polymers is improved over a syndiotactic styrene polymer. Also, the graft copolymer of the present invention can serve as a compatibilizer for a polymer blend.
摘要:
A novel dinuclear metallocene complex is disclosed, which is represented by the following formula (I): wherein M1 and M2 are the same or different and are independently selected from the group consisting of Group IIIB, Group IVB and Group VB transition metals; each X is the same or different and is indepedently an anionic ligand with −1 valence, which is selected from the group consisting H, C1-20 hydrocarbyl, halogen, C1-20 alkoxy, C1-20 aryloxy, NH2, NHR11, NR11R12, —(C═O)NH2, —(C═O)NHR13, and —(C═O)NR13R14, wherein R11, R12, R13 and R14 are C1-20 alkyl; i is an integer from 1 to 3; j is an integer from 1 to 3, R1, R2, R3, R4, R5, R6, R7, and R8 are the same or different and are independently H, a C1-20 linear, branched or cyclic hydrocarbyl group, or a C2-4 cyclic hydrocarbylene group which forms a C4-6 fused ring system; Y1 and Y2 are the same or different and each is an electron-donating group independently selected from a Group 15 or Group 16 element; R9 and R10 are the same or different and each is a divalent radical selected from (—C(R15)2—)p, (—Z(R15)2—)p, or (—Z(R15)2—C(R15)2—)p, Z being silicon, germanium, or tin, R15 being C1-6 alkyl, p being an integer from 1 to 4; R16 is a divalent unsubstituted or alkyl-substituted cyclic alkylene group; and each R17 is independently a C1-20 linear, branched or cyclic hydrocarbyl group. By using the dinuclear metallocene complex as the catalyst, a high molecular weight olefin polymer can be obtained.
摘要:
An optical sheet is moved by a conveyor belt, and at least one beam is configured above the conveyor belt. When the beam is intersected by the moving optical sheet, the optical sheet is determined to be curled. The present invention achieves automatic in-line measuring of optical sheet curls by precise optical measurement and thus enhances measuring accuracy and raises measuring speed.
摘要:
An antiglare film applicable to polarizers or displays includes a light-transparent resin, first light-transparent particles dispersed on surface of the light-transparent resin and second light-transparent particles dispersed inside the resin. The first light-transparent particles have a same refractive index as that of the resin and particle diameters of 9 to 500 nanometers that provide a less roughness surface of the resin in order to prevent from large angle diffusion to the interior light and improve clarity of image. The second particles have a different refractive index from the resin so as to diffuse the exterior light that comes to the antiglare film so as to decrease glare. The antiglare film can be made by one time of coating. The two layer light-transparent particles provide light interference and achieve a low reflectivity.
摘要:
An optical sheet is moved by a conveyor belt, and at least one beam is configured above the conveyor belt. When the beam is intersected by the moving optical sheet, the optical sheet is determined to be curled. The present invention achieves automatic in-line measuring of optical sheet curls by precise optical measurement and thus enhances measuring accuracy and raises measuring speed.
摘要:
A liquid crystal structure for compensating for the retardation of STN LCD is described. The liquid crystal structure has at least a first polarizer, a first liquid crystal compensation film, a main liquid crystal layer, a second liquid crystal compensation film, and a second polarizer. A main retardation is introduced when the light passes through the main liquid crystal layer. When the light passes through the first liquid crystal compensation film and the second liquid crystal compensation film, a first compensation retardation and a second compensation retardation are obtained, respectively, to compensate for the main retardation, so that a biaxial compensation is achieved. The material of the first liquid crystal compensation film and the second liquid crystal compensation film is nematic liquid crystal.
摘要:
The present invention provides a polarizing film with high polarization degree and high transmittance, which is directed to the use of polyvinyl alcohol (PVA)-based film by subjecting to a monoaxial multi-step dry-stretch process, thereafter conducting a swelling process in a water-washing tank, cross-dyeing in a dyeing-crosslinking tank comprising an aqueous iodine containing solution, then subjecting to a post stretch process in an stretch tank 05 comprising PVA crosslinking agent, as to obtaining a polarizing film with a transmittance of at least 43% and a polarization degree of at least 98%; and the producing method thereof, a polarizing plate and an optical component produced from the same.