Abstract:
PROBLEM TO BE SOLVED: To make it possible to maintain the impermeability of a relatively small organic molecule comprising, e.g. methanol for a long period of time even under a mechanical load by fluorinating, sulfonating, oxidizing or activating the surface of a plastic molding, and then coating it with a silane coating material. SOLUTION: This method for coating a plastic molding comprises activating the surface of a plastic molding by fluorination, sulfonation, oxidization or the like, coating the surface with a silane coating material preferably containing a silane compound represented by the formula (wherein A is a 1-20C alkylene group of which the nonadjacent methylenes except methylenes at the α and ωpositions can be substituted by the oxygen atoms of an ether functional group; and R is a 1-4C alkyl group) and bisphenol A as a dihydroxy compound serving to crosslink, and curing the coating.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing the subject polymer, capable of efficiently obtaining the polymer, easy in the activation and reactivation of a catalyst and capable of inhibiting the generation of a troublesome polymerization phenomenon in the polymerization system by polymerizing an alkene monomer in the presence of a specific catalyst composition in a specified temperature range and in a specified pressure range. SOLUTION: This method for producing the polymer comprises polymerizing a 2-12C alkene monomer (preferably a 2-12C alkene-1, e.g. ethylene or propylene) in the presence of a catalyst composition of the formula (M is boron, aluminum, gallium, indium, thallium; R , R are each H, a 1-10C alkyl, a 6-15C aryl, etc.) at a temperature of -50 to 300 deg.C under a pressure of 0.5 to 3000 bar. The catalyst composition includes a Ziegler-Natta catalyst composition, especially preferably a catalyst system containing a metallocene complex and a metallocene ion-forming compound. Thereby a troublesome polymerization phenomenon generated due to a high catalyst action in the catalyst system can be suppressed. The used catalyst can simply be inactivated and further reactivated.
Abstract:
PROBLEM TO BE SOLVED: To provide a propylene polymer which has a high rigidity/strength ratio and low chlorine content, and can be produced by a process with high productivity. SOLUTION: A propylene polymer containing a matrix comprising a propylene homopolymer and a copolymer of propylene with other alkene is first dissolved in boiling xylene, the solution is cooled at a cooling rate of 10 deg.C per hr to 25 deg.C, the temperature is then raised to separate the propylene polymer into fractions of various solubilities according to the stereoregularities of polymer chains and the comonomer distributions, wherein the matrix remaining undissolved when the cooled propylene polymer solution is heated to 80 deg.C satisfies one or more of the following conditions: i) the matrix remains undissolved in an amount above 20 wt.% when further heated to 112 deg.C; ii) it remains undissolved in an amount above 8 wt.% when further heated to 117 deg.C; and iii) it remains undissolved in an amount above 1 wt.% when further heated to 122 deg.C.
Abstract:
PROBLEM TO BE SOLVED: To obtain a propylene homopolymer having a very low content of xylene-soluble component, low content of chlorine and high content of long and complete isotactic polymer component. SOLUTION: This propylene homopolymer is to satisfy at least one of the following conditions when the propylene homopolymer subjected to stereoregularity is separated by dissolving the propylene homopolymer into a boiling xylene, cooling the resultant solution to 25 deg.C at a cooling rate of 10 deg.C/h, followed by separating the polymer into different fractions in stereoregularity while raising the temperature, i) an insoluble fraction of the propylene homopolymer is >20 wt.% when the cooled propylene homopolymer is heated to 112 deg.C, ii) an insoluble fraction of the propylene homopolymer is >8 wt.% when the cooled propylene homopolymer is heated to 117 deg.C, and iii) an insoluble fraction of the propylene homopolymer is >1 wt.% when the cooled propylene homopolymer is heated to 122 deg.C.
Abstract:
PROBLEM TO BE SOLVED: To obtain an expandable styrene polymer containing a foaming agent and a specific foaming auxiliary and exhibiting an improved expandable characteristic without affecting other treating characteristics and product characteristics. SOLUTION: This expandable styrene polymer contains a foaming agent and 0.5-20wt.% of a foaming auxiliary. Therein, the foaming auxiliary comprises a 2-20C aliphatic olefin oligomer which is liquid at room temperature and has a number - average polymerization degree of 2-200, preferably 2-100, and plural terminal double bonds, such as propene oligomer or isobutene oligomer.
Abstract:
PROBLEM TO BE SOLVED: To obtain polyolefin particles having high degree of porosity, easy in handling, free from dust, and having a narrow mol.wt. distribution by polymerizing an olefin in the presence of a metallocene catalyst in an emulsion. SOLUTION: Ethylene, propylene or a cyclic olefin or their mixture (preferably ethylene or propylene alone) is polymerized in the presence of a metallocene catalyst in an emulsion. A dispersant used in the polymerization is preferably a styrene-diene block binary copolymer or a styrene/diene/styrene block terpolymer. A dispersing solvent is preferably an aliphatic hydrocarbon. The obtained crystalline polymer can be used for obtaining functional compounds such as an epoxide.
Abstract:
Verfahren zur Herstellung von Polymerisaten von C 2 - bis C 12 -Alkenen bei Temperaturen im Bereich von -50 bis 300°C und Drücken von 0,5 bis 3000 bar in Gegenwart eines Katalysatorsystems, wobei man eine Verbindung der allgemeinen Formel I in der
M 1
Bor, Aluminium, Gallium, Indium oder Thallium bedeutet
und
R 1 , R 2
für Wasserstoff, C 1 - bis C 10 -Alkyl, C 6 - bis C 15 -Aryl, Alkylaryl oder Arylalkyl mit jeweils 1 bis 10 C-Atomen im Alkylrest und 6 bis 20 C-Atomen im Arylrest, 5- bis 7-gliedriges Cycloalkyl, das seinerseits ein C 1 - bis C 10 -Alkyl als Substituent tragen kann oder wobei R 1 und R 2 gemeinsam für 4 bis 15 C-Atome aufweisende cyclische Gruppen stehen
Abstract:
Verfahren zur Herstellung von kristallinen Polymerisaten aus Ethylen, Propylen oder cyclischen Olefinen oder deren Mischungen, wobei man in Gegenwart von Metallocenkatalysatorsystemen in Dispersion polymerisiert.
Abstract:
Expandable polystyrene (EPS) containing blowing agent also contains 0.1-20 wt.% of a blowing aid comprising an oligomeric aliphatic 2-20C olefin (I) and a number average degree of polymerisation (DP) of 2-200, which is liquid at room temperature. Also claimed are methods of producing expandable polystyrene beads.
Abstract:
Propylene polymers (I) contain a matrix of propylene homopolymer and a copolymer of propylene and other alkenes. The novelty is that the polymers satisfy certain condition(s) when separated by tacticity and comonomer distribution of the polymer chain. They are first dissolved in boiling xylene, then the solution is cooled to 25 degrees C at a rate of 10 degrees C/hour. The polymers are separated, into fractions of different solubility at increasing temperature, whilst the matrix remains undissolved on heating the cooled solution to 80 degrees C. The conditions are that the amount of matrix remaining undissolved on further heating is (i) > 20 wt.% at 112 degrees C; (ii) > 8 wt.% at 117 degrees C and/or > 1 wt.% at 122 degrees C. Also claimed are (1) a method of producing (I); and (2) films, fibres or mouldings made from (I).