| 摘要 |
1,274,870. Producing poromeric materials; bonded fibre fabrics. BADISCHE ANILIN-& SODA-FABRIK A.G. 19 Sept., 1969 [21 Sept., 1968], No. 46198/69. Headings DIP and D1R. [Also in Division C3] A process for producing poromeric materials comprises (a) impregnating a flat fibrous structure with a liquid containing one or more monoolefinically unsaturated monomers and one or more high polymeric plastics materials in dissolved, emulsified or dispersed form, but no polyolefinically unsaturated monomers, (b) freezing the impregnated fibrous structure with complete or partial crystalline solidification of the liquid, (c) irradiating the frozen structure with electromagnetic radiation having a wavelength of less than 0.70Ám or ionising radiation to effect polymerisation of the monoolefinically unsaturated monomer(s), (d) thawing the frozen structure, and (e) separating said liquid from the resultant poromeric material. Suitable monomers include acrylate and methacrylate esters, acrylic and methacrylic amides and their N-methylol derivatives and ethers thereof, acrylic and methacrylic acids, vinyl carboxylate esters, vinyl ethers, N-vinyl caprolactam, N-vinyl carbamic acid ethyl ester, vinyl chloride, vinylidene chloride, styrene, vinyl toluene, vinyl thio ethers and also monomers containing one or more chromophoric groups, e.g. 1-amino-4-acryloylaminoanthraquinone-2-carboxylic acid 2-n-propoxyethyl ester. The medium in which the monomer is incorporated may be, for example, acetic acid, dioxan, benzene, water, trioxan or urea. The high polymer may be an addition polymer of a mono- and/or di-olefinically unsaturated monomer, or a polyester, polyurethane, polyamide, polyvinyl alcohol, polyalkylene oxide, polyacetal, polycarbonate, polyurea, cellulose ester or ether, or polyamine. When appropriate, the liquid may include a photoinitiator or photosensitiser. The fibrous structure may be non-woven e.g. spunbonded, woven or knitted fabric formed from materials such as wool, cellulosic, cellulose acetate, viscose, polypropylene, polyamide, polyacrylonitrile and/or polyethylene terephthalate fibres. The irradiation in step (c) may be actinic (including daylight or sunlight), or ionising such as electron beams, X-rays and radioactive radiation. Monomer conversion is generally from 60-90%. The products obtained can be used as floor coverings, thermal insulating materials, leather substitutes and coating materials.
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