Abstract:
A laminate structure having improved resistance to delamination because of enhanced interaction between the laminae and binder. The basic unit of this structure is a lamina which is initially coated or impregnated with a surface-active block copolymer and then coated or impregnated with a binder or base polymer. The clock copolymer contains a polymerized comonomer component which is compatible with the binder or base polymer thereby bonding it to the block copolymer, and a polymerized comonomer component which is sufficiently surface-active that the block copolymer wets and adheres to the lamina.
Abstract:
AROMATIC POLYSULFONZAIDES HAVE BEEN FOUND TO BE EFFECTIVE FOR CURING A WIDE VARIETY OF ORGANIC POLYMERS HAVING AT LEAST 20 MOL PERCNET OF AROMATIC SUBSTITION, SUCH AS POLYSTYRENE, AROMATIC POLYCARBONATES. POLY(PHENYLSILSESQUIOXANES), AROMATIC POLYESTERS, ETC. THE RESULTING CURED PRODUCTS HAVE A HIGH DEGREE OF INFUSIBILITY AND INSOLUBILITY.
Abstract:
HEXAMETHYLPHOSPHORAMIDE-COMPLEXES OF ALKALI METAL SILANOLATES ARE PROVIDED, AND A METHOD FOR MAKING THESE MATERIALS. THESE ALKALI METAL SILANOLATE-COMPLEXES CAN BE USED AS POLYMERIZATION INITIATORS FOR THE PREPARATION OF ORGANOPOLYSILOXANES AND ORGANOPOLYSILOXANE BLOCK POLYMERS.
Abstract:
A POLYMER-FILLER COMPOSITION HAVING IMPROVED PROPERTIES COMPRISED OF A BASE POLYMER, A FILLER AND A SURFACEACTIVE ADDITIVE WHICH IS A BLOCK COPOLYMER. THE BLOCK COPOLYMER ADDITIVE CONTAINS AT LEAST TWO POLYMERIZED COMONOMERS, ONE OF WHICH IS COMPATIBLE WITH THE BASE POLYMER THEREBY IMPARTING STABILITY TO THE COMPOSITION, AND THE SECOND OF WHICH IS SURFACE-ACTIVE IN THE COMPOSITION SO THAT THE BLOCK COPOLYMER IS CONCENTRATED AT THE INTERFACE BETWEEN THE FILLER AND BASE POLYMER TO PROVIDE A BOND THEREBETWEEN.
Abstract:
A CONDENSATION METHOD IS PROVIDED FOR MAKING BRANCHED AND MULTIPLE SEQUENCE BLOCK POLYMERS. A SILANE HAVING AT LEAST TWO HYDROLYZABLE RADICALS ATTACHED TO SILICON IS EMPLOYED TO COUPLE ACTIVE POLYDIORGANOSILOXANE HAVING AT LEAST ONE TERMINAL ALKALI METAL SILANOLATE RADICAL. THE POLYDIORGANOSILOXANE CAN BE IN THE FORM OF A BINARY OR TERNARY BLOCK AND THE ALKALI METAL SILANOLATE IS COMPLEXED WITH HEXAMETHYLPHOSPHORAMIDE TO PROVIDE A STABLE NON-RANDOMIZING ACTIVATED SITE. THE MULTIPLE SEQUENCE BLOCK POLYMERS EXHIBIT IMPROVED PHYSICAL PROPERTIES OVER THE CORRESPONDING BINARY OR TERNARY BLOCK POLYMERS.