摘要:
ALKALI METAL MARCAPTIDES HAVE BEEN FOUND USEFUL AS CATALYSTS IN THE REACTION OF ORGANIC ISOCYANATES WITH COMPOUNDS HAVING A REACTIVE HYDROGEN ATOM. THE CATALYST ARE PARTICULARLY EFFECTIVE IN THE PRODUCTION OF URETHANE AND SIOCYANURATE COMPOUNDS.
摘要:
COMPATIBLE ALLOYS OR BLENDS OF AT LEAST ONE VINYL HALIDE POLYMER AND AT LEAST ONE COPOLYMER OF AN OLEFIN AND A NITROGEN-CONTAINING COMONOMER HAVING A BASIC CHARACTERISTIC ARE PRODUCED; E.G. AN ALLOY OF POLY(VINYL CHLORIDE) AND A COPOLYMER OF ETHYLENE AND N-METHYL-N-VINYLACETAMIDE OR N,N-DIMETHYLACRYLAMIDE.
摘要:
1. A NORMALLY SOLID, FUSIBLE COMPOSITION CAPABLE OF BEING TRANSFORMED INTO A THERMOSET COMPOSITON BY SUBJECTING SAID FUSIBLE COMPOSITION TO HEAT, WHEREIN SAID FUSIBLE COMPOSITION COMPRISES THE REACTION PRODUCT OF (A) AN ALKYLENE OXIDE CONDENSATE OF A NOVOLAK, (B) A STOICHIOMETRIC EXCESS OF AN ORGANIC POLYISOCYANATE, AND (C) A CATALYTICALLY EFFECTIVE QUANTITY OF A CATALYST FOR PROMOTING THE FORMATION OF ISOCYANURATE FROM ISOCYANATE, WHEREIN THE REACTION IS INTERRUPTED BY COOLING BEFORE REACHING THERMOSET STAGE.
摘要:
CERTAIN AMIDE COMPOUNDS BASED ON AROMATIC AMINES ARE UTILIZED AS POLYMERIZTION INITIATORS OR ACTIVATORS WITH ALKALINE CATALYSTS IN THE ANIONIC POLYMERIZATION OF LACTAM MONOMERS SO AS TO PROVIDE POLYMERIZATION SYSTEMS WHICH MAY BE UTILIZED IN A VARIETY OF MOLDING OPERATIONS.
摘要:
Certain amide compounds based on aromatic amines are utilized as polymerization initiators or activators with alkaline catalysts in the anionic polymerization of lactam monomers so as to provide polymerization systems which may be utilized in a variety of molding operations.
摘要:
BLENDS OF THERMOPLASTIC POLYHYDROXYETHERS, DERIVED FROM BISPHENOL A AND EPICHLOROHYDRIN, WITH POLYAMIDES WERE PREPARED HAVING SUPERIOR ENVIRONMENTAL STRESS CRACK RESISTANCE OVER THAT OF THE POLYHYDROXYETHERS ALONE. THE RESULTANT BLENDS ARE MECHANICALY COMPATIBLE AND CAN BE MOLDED AND BLOWN INTO FILM FORM.
摘要:
This invention relates to improved block copolycarbonates containing an amorphous, soft, rubbery segment or block composed of lactone units and other crystalline, hard, thermoplastic segment or block composed of dihydric phenol carbonate units. The present invention also relates to novel liquid compositions formed by extending an appropriate polylactone diol with an extending agent selected from the group consisting of dihydric phenols, aliphatic diols, dicarboxylic acids and hydroxy monocarboxylic acids. The aforementioned extended diols are particularly useful in the production of the block copolycarbonates of this invention. This invention also contemplates a novel method for reducing the extent of annealing time normally required for the primary crystallization of a block copolycarbonate of this invention comprising including in the block copolycarbonate composition, prior to primary crystallization, a nucleating agent.
摘要:
CERTAIN HALOGEN AROMATIC COMPOUNDS ARE UTILIZED AS POLYMERIZATION INITATORS OR ACTIVATORS WITH ALKALINE CATALYSTS IN THE ANIONIC POLYMERIZATION OF LACTAM MONOMERS TO PROVIDE LONG POT LIFE, A RAPID POLYMERIZATION AND NOVEL POLYMERS. THE INITIATORS ARE COMPOUNDS CONTAINING AT LEAST ONE CARBOCYCLIC AROMATIC RING SUBSTITUTED WITH AT LEAST ONE HALOGEN ATOM WHICH HAS BEEN ACTIVATED TOWARDS NUCLEOPHILIC SUBSTITUTION.
摘要:
BLOCK COPOLYMERS ARE PREPARED FROM LACTAM MONOMER AND VINYL POLYMER HAVING THE STRUCTURE
T-(C(-X1)(-X3)-C(-X2)(-X4))M-T''
WHEREIN X1, X2, X3 AND X4 ARE SELECTED SUBSTITUENT GROUPS, T AND T ARE SELECTED TERMINAL GROUP AND M IS A WHOLE NUMBER OF ABOUT 16 100.000. THE POLYMERS ARE PREPARED IN A LACTAM ANIONIC POLYUMERIZATION REACTION USING AN ALKALINE CATALYST AND THE VINYL POLYMER AS AN ACTIVATOR OR INITIATOR.
摘要:
Certain amide compounds based on aromatic amines are utilized as polymerization initiators or activators with alkaline catalysts in the anionic polymerization of lactam monomers so as to provide polymerization systems which may be utilized in a variety of molding operations.