Abstract: A process is described for the preparation of latices based on polychloroprene, comprising the polymerization of chloroprene in the presence of a first latex essentially consisting of polymeric particles produced in a first polymerization of a composition of monomers comprising (a) alpha-, beta-unsaturated carboxylic acids and/or derivatives thereof, (b) vinyl aromatic compounds, (c) conjugated dienes; said first latex having a content of alpha-, beta-unsaturated carboxylic acids, expressed as parts of alpha-, beta-unsaturated carboxylic acids per 100 grams of polymeric particles, ranging from 1 to 15%, thus obtaining a final latex, the solid particles of said final latex having an quantity of chloroprene ranging from 50 to 95% by weight, preferably from 80 to 95% by weight.

Abstract: A process is described for the preparation of latices based on polychloroprene, comprising the polymerization of chloroprene in the presence of a first latex essentially consisting of polymeric particles produced in a first polymerization of a composition of monomers comprising (a) alpha-, beta-unsaturated carboxylic acids and/or derivatives thereof, (b) vinyl aromatic compounds, (c) conjugated dienes; said first latex having a content of alpha-, beta-unsaturated carboxylic acids, expressed as parts of alpha-, beta-unsaturated carboxylic acids per 100 grams of polymeric particles, ranging from 1 to 15%, thus obtaining a final latex, the solid particles of said final latex having an quantity of chloroprene ranging from 50 to 95% by weight, preferably from 80 to 95% by weight.

Abstract: A process is described for the preparation of latices based on polychloroprene, comprising the polymerization of chloroprene in the presence of a first latex essentially consisting of polymeric particles produced in a first polymerization of a composition of monomers comprising (a) alpha-, beta-unsaturated carboxylic acids and/or derivatives thereof, (b) vinyl aromatic compounds, (c) conjugated dienes; said first latex having a content of alpha-, beta-unsaturated carboxylic acids, expressed as parts of alpha-, beta-unsaturated carboxylic acids per 100 grams of polymeric particles, ranging from 1 to 15%, thus obtaining a final latex, the solid particles of said final latex having an quantity of chloroprene ranging from 50 to 95% by weight, preferably from 80 to 95% by weight.

Abstract: Process for coating and protecting elastomers, particu- larly EP(D)M elastomeric polymers, by the application of a coating to the above elastomers, consisting of at least one layer of protective material (material A), optionally reinforced with one or more layers of reinforcing material (material B), characterized in that:material A essentially consists of an expanded material selected from (i) branched or linear polyethylenes, (ii) ethylene-vinylacetate copolymer with a content of vinyl acetate of from 2 to 18%, ionomeric resins, branched propylenes, and the relative mixtures,material B essentially consists of a non-expanded material again selected from (i), (ii), and the relative mixtures.

Abstract: A disposable sprinkler line for localized irrigation comprising a hose having outlet holes at equal distances from each other, and inner flexible membranes attached to the inner wall of the hose capable of forming interstices with the inner wall in the presence of a water flow. The inner flexible membranes are provided with openings at regular intervals and staggered relative to the outlet holes in the hose for receiving the pressurized water.