Abstract: Process for the production of acrylic fibre, for fabrics with a low pilling formation, having a titer within the range of 1.0 to 5.6 dtex, which comprises the wet spinning in a solvent of a copolymer essentially consisting of acrylonitrile, in a quantity within the range of 97 to 99.99% by weight, and a comonomer with a strong acid group of the sulfonic type having the general formula: CH2?C(R)—CH2SO3—M wherein R represents a hydrogen atom or the CH3 radical whereas M represents a hydrogen atom or an alkaline metal in a quantity ranging from 0.01 to 3% by weight.

Abstract: Outdoor fabric based on spun acrylic fibres in which the said fabric is associated with at least one polymer selected from a group comprising melamine resins, fluoropolymers and mixtures thereof, and anatase titanium dioxide nanoparticles. A process for improving the resistance of an outdoor fabric to atmospheric agents and pollutants comprising the steps of associating an outdoor fabric based on spun acrylic fibres with at least one polymer selected from the group comprising melamine resins, fluoropolymers and mixtures thereof, and with anatase titanium dioxide nanoparticles.

Abstract: A process for the preparation of water repellent acrylic fiber materials which includes (a) a first step in which the material is subjected to plasma treatment in the presence of a reactive gas or a mixture thereof with a noble gas; and (b) a second step in which the material obtained in step (a) is subjected to waterproofing by means of (i) traditional resin finish or (ii) with plasma generated in the presence of fluorinated compounds. The materials made of acrylic fiber obtained by the process have a waterproofing degree higher than 25 cm of water column and have a rigid appearance or good draping and softness depending on whether they have been water-proofed with treatment (i) or (ii). These materials may used in the preparation of covers or sun shields.

Abstract: A process is described for the preparation of end-products made of acrylic fiber, for external use, by the joining of one or more sheets with a copolyamide adhesive, resistant to solar light, the above junction been effected by the melting of said adhesive on the acrylic matrix and subsequent pressing of the glued area with a system capable of exerting an adequate pressure.

Abstract: A process is described for the preparation of water repellent materials made of acrylic fibre which comprises:

Abstract: A process is described for the preparation of end-products made of acrylic fiber, for external use, by the joining of one or more sheets with a copolyamide adhesive, resistant to solar light, the above junction been effected by the melting of said adhesive on the acrylic matrix and subsequent pressing of the glued area with a system capable of exerting an adequate pressure.

Abstract: Non-woven mat consisting of one or more overlapped layers, each made of continuous, parallel, monodirectional filaments of an acrylic polymer having a tenacity of at least 50 cN/tex, an elastic modulus equal to at least 1000 cN/tex, and an ultimate elongation lower than 15%.Use of this non-woven mat as reinforcement for organic and inorganic matrices, and manufactured articles thus obtained.

Abstract: Agglomerates of acrylic fibers with improved dispersability in viscous organic or inorganic matrices constituted by at least 10 fibers bonded to each other, and wherein each fiber has a diameter shorter than 50 microns and a length higher than 3 mm.

Abstract: Continuous process for preparing a spinning solution of acrylic polymeric material. Process utilizes acrylic polymers obtained in a bulk polymerization slurry, and comprises adding a solvent such as dimethylacetamide to the slurry in such quantity as to be insufficient to attack and dissolve the polymer, bringing the resulting mixture to a temperature not exceeding 170.degree.C, such temperature being such as to not result in any appreciable attack of the polymer by the solvent, removing unreacted monomer by vacuum adiabatic evaporation, and then heating to a temperature not exceeding 170.degree.C, such temperature being sufficiently high to result in solvent attack and dissolution of the polymer.