| 摘要 |
Polyolefin fibres consisting of isotactic macronolecules have elastomeric, saturated and amorphous ethylene-alpha-olefine copolymers adhesively bonded thereto by applying directly to the fibres a mix of an ethylene-alpha-olefine copolymer containing a curing agent and a reinforcing filler and heating the whole to a temperature sufficient to vulcanize the copolymer mix without melting the polyolefin fibre. The copolymer may be a copolymer of ethylene with propylene or butene-1. The mix can be used as a foamed, spongy product. The fibre may be formed from isotactic polyproylene. The curing agent may be organic peroxides admixed with coagents acting as free radical acceptors such as sulphur, quinonimide compounds, furfural and derivatives thereof, maleic acid, anhydride. The reinforcing filler may be carbon black, or mineral fillers. The mix may be subjected to a thermo-mechanical pre-treatment prior to the addition of the curing agent.ALSO:Polyolefin fibres consisting mainly of isotactic macromolecules or articles obtained therefrom, have elastomeric, saturated and amorphous ethylene-alpha-olefine copolymers adhesively bonded thereto by applying directly to the fibres or articles a mix of an ethylene-alphaolefine copolymer containing a curing agent and a reinforcing filler and heating the whole to a temperature sufficient to vulcanize the copolymer mix without melting the polyolefin fibre. The mix copolymer may be a copolymer of ethylene with propylene or butene 1 obtained by copolymerizing the monomers in the presence of organometallic compounds of aluminium e.g. AlEt3, AlEt2Cl and Al(iso Bu)3, and soluble or dispersed vanadium compounds e.g. VCl4, VOCl3, VAc3 where Ac is acetylacetone, and may have a Mol. Wt. of 50,000 to 500,000 and an ethylene content of 20 to 80% mols. The mix can be used as such or in the form of a foamed, spongy product. The fibre may be formed from polypropylene consisting mainly of isotactic macromolecules obtained through polymerization of the monomer in the presence of stereospecific catalysts consisting of aluminium organometallic compounds such as AlEt3, AlEt2Cl, and titanium compounds such as TiCl3. The curing agents may be organic peroxides, admixed with coagents acting as free radical acceptors such as sulphur, quinonimide compounds, furfurol and its derivatives. Other coagents may be maleic acid, maleic anhydride and other maleic derivatives. Reinforcing fillers may be carbon black or mineral fillers. When a white mineral filler is used, the mix may be subjected to a thermo-mechanical pre-treatment prior to the addition of the curing agents. Other additives may be used in the mix e.g. neutralizing substances for acidic fillers, dyes. In Examples, fabrics for conveyor belts, satin fabrics and fabrics for tapestry are treated. |
