Hot-melt adhesive for bonding polyethylene and other poly (alpha-olefins), in particular for the isolation of pre-insulated district heating pipes joints, and its manufacturing

摘要

the subject of the invention is termotopliwy glue gluing of polyethylene and other poly (alpha - olefins), especially for isolation of pre insulated pipes heating, and high adhesion to the surface of adhesive polyethylene high, medium and low density, the standard and the lu b cross-linked using various methods, as well as other poly (alpha - olefins).the glue is replaced by two components: a polyamide homogenisation and based on amorphous polyolefins.poliamidowy component produced by polycondensation dimers fatty acids 36 carbon atoms in the molecule in a mixture of acids dikarboksylowymi about 6 - 12 carbon atoms in the molecule and monokarboksylowymi acids containing 2 to 18 carbon atoms in the molecule and a mixture of d iamin aliphatic containing from 2 to 10 carbon atoms in the molecule with diaminami heterocyklicznymi,advantageously piperazinu0105 using excess molar amin of 1 to 20 mole%. the polycondensation is in temperature gradually increasing from 140 to 250u00b0c, and at the end of the reaction is carried out under reduced pressure.component based amorphous polyolefins produced by fusion in the heated gas mixing piece alifatycznej resin wu0119glowodorowej, flavouring liquid resin wu0119glowodorowej; a copolymer of ethylene and vinyl acetate, oxidised wax polyethylene, polyisobutylene and modified acid laminated aluminosilicate citric haloizytu.after the total homogenization glue is directly on the substrate, or konfekcjonuje standard methods. the adhesive exhibits resistance to oddzieranie welds: polyethylene cross-linked polyethylene ldpe hdpe - more than 50 n / cm. the temperature of the glue is 155 - 165u00b0c.