Patent application number | Description | Published |
20100069573 | PRODUCTION OF META-BLOCK COPOLYMERS BY POLYMER SEGMENT INTERCHANGE - Meta-block copolymers and a process for preparing a product mixture comprising meta-block copolymers by contacting a metathesis catalyst under metathesis conditions with a composition comprising two or more ethylenically unsaturated polymers, said unsaturation defining one or more polymer segments in each ethylenically unsaturated polymer, at least one polymer segment in at least one ethylenically unsaturated polymer being chemically distinguishable from at least one polymer segment in at least one other ethylenically unsaturated polymer, characterized in that each meta-block copolymer in the product mixture comprises a random distribution of said chemically distinguishable polymer blocks. | 03-18-2010 |
20100222513 | PRODUCTION OF METATHESIS PRODUCTS BY AMORPHOUS POLYMER SEGMENT INERCHANGE - A cross-metathesized product mixture is prepared by contacting a metathesis catalyst under metathesis conditions with a composition comprising two or more chemically distinguishable ethylenically unsaturated polymers, at least one of said ethylenically unsaturated polymers (first polymer) having from 0.001 to 50 mole percent unsaturation and at least one other of said ethylenically unsaturated polymers (second polymer) being an amorphous polymer having a Tg less than 0° C. and having from 0.001 to 5 mole percent unsaturation. | 09-02-2010 |
20110224389 | METHOD FOR RECYCLING AMINE CATALYST IN INTERFACIAL POLYCARBONATE MANUFACTURING PROCESS - The present invention relates to an improved process for recycling a coupling catalyst, preferably an amine catalyst in an interfacial polycarbonate manufacturing process. Specifically, the amine catalyst is recycled in an acidic wash water solution. | 09-15-2011 |
20110288243 | Carbonate Block Copolymers - Disclosed are novel carbonate block copolymers and methods of making the same. Some carbonate block copolymers include oligomeric carbonate blocks bonded to one or more silicon-containing non-carbonate block, wherein the silicon-containing non-carbonate block is comprised of a diamine moiety and the carbonate block is joined to the silicon-containing non-carbonate block through a urethane group. Other carbonate block copolymers include oligomeric carbonate blocks bonded to one or more non-silicon-containing non-carbonate block, wherein the non-silicon-containing non-carbonate block is comprised of a diamine moiety and the carbonate block is joined to the non-silicon-containing non-carbonate block through a urethane group. The carbonate block may include Bisphenol-A moieties. The diamine from which either the silicon-containing or non-silicon-containing non-carbonate block is derived may be primary, secondary or tertiary. | 11-24-2011 |