Abstract: A reactive, powdered polymeric material, the polymeric material comprising polymer particles (i) having an average particle size less than about 1000 .mu.m; (ii) which are made up of a plurality of smaller particles; and (iii) having energy stored therein. A process for producing the powdered polymeric material is described. The process comprises the steps of: (i) placing polymeric material in a milling chamber equipped with impact means; (ii) accelerating the impact means to at least about 50 ml/s.sup.2 ; (iii) impacting the polymeric material with the impact means; (iv) repeatedly welding and fracturing the polymeric material; and (v) repeating Steps (ii), (iii) and (iv) until a powdered polymeric material is produced having an average particle size less than about 1000 .mu.m. During Steps (iii) and (iv), the temperature of the milling chamber is maintained below the glass transition temperature of the polymeric material.

Abstract: A method of treating hazardous material or other substrate with an aqueous air foam, comprising the steps of (1) preparing an aqueous solution or dispersion comprising (a) water-soluble polyhydroxy polymer having a plurality of hydrogen-bondable 1,2- and/or 1,3-diol structures capable of complexation with the borate anion, B(OH).sub.4.sup.

Abstract: A method of treating hazardous material or other substrate with an aqueous air foam, comprising the steps of (1) preparing an aqueous solution or dispersion comprising (a) water-soluble polyhydroxy polymer having a plurality of hydrogen-bondable 1,2- and/or 1,3-diol structures capable of complexation with the borate anion, B(OH).sub.4.sup.

Abstract: A precipitation polymerization process for the production of a macroporous cross-linked copolymer in which there is added to a reactor equipped with a stirrer, at least one monounsaturated monomer and at least one polyunsaturated monomer, dissolving an inorganic polymerization reaction initiator in a homogeneous minimum-boiling binary azeotrope including a solvent and water, and conducting the polymerization in the azeotrope.

Abstract: A process for the production of expanded particles, which comprises providing an aqueous dispersion containing expandable particles which are formed of a polypropylene resin and which contain a blowing agent and an expansion aid and maintained at a temperature higher than the softening point of the resin and under a pressurized condition, and subjecting the dispersion to a lower pressure so that the expandable particles are expanded. The expansion aid is organic or inorganic solids having a particle size of 0.1 to 150 .mu.m and a melting point higher than the temperature at which the expansion of the expandable particles is performed and serves to improve the expansion ratio.

Abstract: Polyvinyl chloride resin in particulate form characterized by said resin particles being spherical in shape and said resin having low amounts of glassy content. Extrudates, such as pipe, formed from the novel resin of this invention have high impact strength. The novel resin of this invention has high bulk density and fast extrusion rates.

Abstract: Microporous polylactide powders having an intrinsic isotropic structure being spherical in a shape and containing interconnecting hollow spaces or openings i.e., micropores are obtained by the steps of heating a polylactide in xylene until substantially complete solution is reached; cooling the resultant clear solution; and separating off the xylene.The microporous powder form powders can have active substances such as a medicament introduced therein i.e. unto the pores and the resultant powder can be used for controllably dispensing the medicament i.e., as a prolonged release form.

Abstract: A porous polystyrene gel is produced by a suspension polymerization in an aqueous system under an incorporation of more than 5 mole % of a radical polymerization catalyst to a total amount of styrene and divinyl benzene with an inert organic solvent.