摘要:
A novel alternating copolymer is prepared by copolymerizing a compound having a polar group, such as a carbonyl or thiocarbonyl group, at a non-conjugated position and a conjugated vinyl compound in the presence of an organoaluminum halide. Alternating copolymers thus-produced are superior in thermal stability to conventional random copolymers and is resistant to coloration. Alternating copolymers obtained by copolymerizing vinyl acetate and methyl acrylate or acrylonitrile are preferred examples of these products.
摘要:
THIS INVENTION RELATES (A) TO A PROCESS FOR PRODUCING A TRIAZINE BY REACTION OF A PERFLUOROALKANE NITRILE IN THE PRESENCE OF A CATALYTIC AMOUNT OF A METAL NITRIDE AND (B) THE CROSS-LINKING OF A POLYMER OR COPOLYMER CONTAINING AT LEAST GREATER THAN AN AVERAGE OF ONE CYANOHALOALKYL GROUP ON THE CHAIN OF THE POLYMER OR COPOLYMER, TO FORM A CROSS-LINKED POLYMER OR COPOLYMER, IN THE PRESENCE OF A METAL NITRIDE.
摘要:
A process for the free radical-initiated polymerization of ethylenically unsaturated monomers in the presence of a free radical initiator compound comprising a 1,1,2,2-tetracarboalkoxydiaryl-ethane.
摘要:
A COMPOUND HAVING A C$N OR C=O GROUP IN THE CONJUGATED POSITION RELATIVE TO THE C=C BOND FORMS A COMPLEX WITH AN ORGANOHALIDE OF ALUMINUM OR BORON. AN ALTERNATING COPOLYMER IS OBTAINED FROM A MONOMER SATISFYING SAID REQUIREMENT AND INNER OLEFINIC MONOMERS OR POLYMERS OR ACETYLENES HAVING A DONOR PROPERTY. IN THIS CASE, AN ORGANOALUMINUM HALIDE OR AN ORGANOBORON HALIDE IS SUITABLE AS THE CATALYST FOR SAID COPOLYMERIZATION. THIS TYPE OF ACITIVE SPECIES CAN ALSO BE OBTAINED BY MIXING AN ORGANIC COMPOUND OF A METAL OF GROUP II, III OR IV OF THE PERIODIC TABLE WITH A HALIDE OF A METAL OF GROUP III OR IV IN THE PRESENCE OF THE ABOVE-MENTIONED CONJUGATED MONOMER.
摘要:
THIS INVENTION RELATES (A) TO A PROCESS FOR PRODUCING A TRIAZINE BY REACTION OF A PERFLUOROALKANE NITRILE IN THE PRESENCE OF A CATALYTIC AMOUNT OF A SILVER SALT, AND (B) THE CROSS-LINKING POLYMER OR COPOLYMER CONTAINING GREATER THAN THE AVERAGE OF ONE CYANOHALOALKYL GROUP PER MOLECULE OF THE POLYMER OR COPOLYMER, TO FORM A CROSS-LINKED POLYMER OR COPOLYMER, IN THE PRESENCE OF A SILVER SALT.
摘要:
AN ALTERNATING COPOLYMER CONSISTS OF (A) A TERMINALLY UNSATURATED OLEFINIC COMPOUND, FOR EXAMPLE, AN A-OLEFIN, AN ISOOLEFIN, OR A HALOGENATED OLEFINIC COMPOUND (VINYL) CHLORIDE, VINYLIDENE CHLORIDE, ALLYL CHLORIDE OR THE LIKE) AND (B) A SUBSTITUTED CONJUGATED VINYL COMPOUND, SUCH AS A SUBSTITUTED ARCYLONITRILE OR A SUBSTITUTED ARCYL ACID DERIVATIVE (ESTERS, AMIDES, ACIDS, ACID HALIDES, KETONES, ACOLEIN AND THE LIKE WHICH HAS A SUBSTITUENT, SUCH AS A HYDROCARBON, HALOGENETED HYDROCARBON OR HALOGEN SUBSTITUENT ON THE A-OR B-POSITION. SAID ALTERNATING COPOLYMER CAN BE PREPARED BY SUBJECTING SAID MONOMERS TO COPOLYMERIZATION WITH AN ORGANOALUMINUM HALIDE OR AN ORGANOBORON HALIDE OR A PRODUCT OF REACTION BETWEEN AN ORGANIC COMPOUND OF A METAL OF GROUPS IIIB, IIIB AND IVB OF THE PERIODIC TABLE AND A HALIDE OF A METAL OF GROUPS IIIB AND IVB OF THE PERIODIC TABLE IN THE PRESENCE OF AT LEAST SAID SUBSTITUTED CONJUGATED VINYL COMPOUND, AT LEAST ONE OF SAIG ORGANIC COMPOUND AND HALIDE BEING ALUMINUM OR BORON-CONTAING COMPOUND.
摘要:
A method is disclosed for initiating the polymerization of small amounts of relatively sensitive liquid monomer compositions, comprising esters of cyanoacrylic acid, by means of a polymerization catalyzing particle adapted to be added to the monomer composition and then separated from the same prior to gelation of the monomer. The catalyzing particle may be in the form of a discrete particle such as beads, chips, or the like, or in the form of a rod sufficiently long so that the same can be used to simultaneously stir and activate the monomer.