摘要:
There is provided a process and apparatus which utilizes a purger capable of handling different solids having different particle sizes and operating at a purge gas velocity higher than the minimum fluidization velocity of solids without gas channeling or solids backmixing. The purger has tapered walls and a conically-shaped, gas-permeable, solids-impermeable constraint means.
摘要:
The present invention is directed to a process for preparing polymers which may be coupled (reacted) at temperatures above about 200.degree. C., the process comprising first reacting monomer(s) selected from conjugated dienes and monoalkenyl arenes with an organomonolithium initiator and then reacting the resulting polymeric arms (P-Li) with certain arylcyclobutene monomers. These arylcyclobutene monomers have the formula ##STR1## where X is an alkylene or arylene group, Z is an arylcyclobutene group, R is selected from the group consisting of aryl groups, alkyl groups, ##STR2## and H, and R.sup.1 is an aryl group or alkyl group.
摘要:
A process for producing cyclized isoprene polymers having a dispersion degree not higher than 2, which comprises living-polymerizing isoprene monomers using as initiator an organometal compound which is expressed by a general formula RM (where R is alkyl, aryl or aralkyl group and M is lithium, sodium or potassium atom), to obtain an isoprene polymer having a dispersion degree not larger than 1.1, which is close to a unit dispersion, and bringing the obtained polymer into contact with a catalyst composed of a boron trifluoride-ether complex and a carboxylic acid expressed by a general formula Cl.sub.3-n H.sub.n CCOOH (where n is an integer ranging from 0 to 3) under a mild condition. The cyclized polymer is very useful for negative resists in integrated circuits.
摘要:
Producing modified petroleum resins by the Friedel Crafts copolymerization of a C.sub.5 olefines and diolefines, C.sub.6 olefines or diolefines or a mixture of C.sub.5 and C.sub.6 olefines and diolefines feed and carene optionally together with a branched chain olefine.
摘要:
A process for preparing a polydiene having increased viscosity and reduced cold flow that includes polymerizing a conjugated diene monomer in the presence of a lanthanide-containing compound to form an intermediate polymer, and then adding a non-organometallic trimellitate ester compound as a coupling agent to raise the viscosity of the intermediate polymer. The coupling agent is added to the intermediate polymer mixture in an amount of about 0.01 to about 0.15 parts per hundred monomer (phm) of the starting monomer amount.
摘要:
A method for preparing a functionalized polymer, the method comprising the steps of: (i) polymerizing monomer to form a reactive polymer, and (ii) reacting the reactive polymer with an imine compound containing a heterocyclic group and a hydrocarbyloxy-substituted or silyloxy-substituted aryl group.
摘要:
The present invention relates to a hydrogenated block copolymer including a polymer block (A) containing a constitutional unit derived from an aromatic vinyl compound and a polymer block (B) containing from 1 to 100% by mass of a constitutional unit (b1) derived from farnesene and from 99 to 0% by mass of a constitutional unit (b2) derived from a conjugated diene other than the farnesene, in which 50 mol % or more of carbon-carbon double bonds in the polymer block (B) are hydrogenated.
摘要:
Disclosed is a blue dye compound for a color filter represented by Chemical Formula 1. The blue colored resin composition including the blue dye compound has excellent solubility to an organic solvent, such as propylene glycol methyl ether acetate (PGMEA), excellent miscibility with the other dyes or pigments and high heat resistance. Therefore, when using the blue dye compound, it is possible to obtain a color filter having high luminance and contrast.
摘要:
An object of the invention is to provide a chloroprene polymer composition resistant to discoloration under heat or light. Provided is a chloroprene rubber composition, prepared by carrying out emulsion polymerization in the presence of 0.5 to 7.0 parts by mass of a rosin acid salt as emulsifier and terminating the emulsion polymerization by addition of a polymerization inhibitor and a phosphorus- or phenol-based compound as antioxidant. It is possible according to the invention to obtain a chloroprene polymer composition superior in discoloration resistance under heat or light. The chloroprene polymer composition according to the present invention can be used favorably for adhesion of cloths, leathers, foamed sheets, papers, woods, shoe parts, and others.
摘要:
Described is process technology for producing brominated aromatic polymer compositions from low molecular weight aromatic polymer compositions. The specified conditions used in the process enable the formation of products having superior color and thermal stability properties.