摘要:
Process for producing regular porous pearl cellulose with a particle size in the range from 2 to 1,000 &mgr;m, comprising the steps: a) a cellulose having a degree of polymerisation in the range from 150 to 2,000 is dissolved in a solvent to form a solution of 0.5 to 25% by mass, b) the cellulose solution is finely divided and dispersed in a dispersant which is immiscible with said solution and has a viscosity in the range from 10 to 80,000 mPa·s, c) the dispersed solution particles are solidified to regular pearl particles by precipitating with a liquid precipitating agent miscible with the solvent (1) after cooling the dispersion to below the melting temperature of the cellulose solution and separating the frozen particles of the cellulose solution from the dispersant or (2) directly in the dispersion, and d) the pearl particles are separated from the liquid mixture of solvent, precipitating agent and possibly dispersant.
摘要:
The invention relates to a method for producing novel reactive organic compounds containing poly-DOPO and having a higher phosphorus content than known comparable DOPO (9,10-dihydro-9-oxa-10-phospha-phenenthrene-10-oxide) adducts, and to the use thereof for flameproofing thermoplastic polymers, such as polyesters and polyamides. The same flameproofing effect is achieved with smaller additive quantities than previously, thus reducing the influence of the physical, especially textile-physical properties of the polymers. The adducts containing poly-DOPO are formed by reacting DOPO with acetylenes carrying reactive groups, in the presence of a catalyst.
摘要:
The invention relates to a method for producing novel reactive organic compounds containing poly-DOPO and having a higher phosphorus content than known comparable DOPO (9,10-dihydro-9-oxa-10-phospha-phenenthrene-10-oxide) adducts, and to the use thereof for flameproofing thermoplastic polymers, such as polyesters and polyamides. The same flameproofing effect is achieved with smaller additive quantities than previously, thus reducing the influence of the physical, especially textile-physical properties of the polymers. The adducts containing poly-DOPO are formed by reacting DOPO with acetylenes carrying reactive groups, in the presence of a catalyst.
摘要:
This invention relates to a method for producing and processing polyester block copolymers, in particular, polyester side-chain grafted, rigid side-chain and/or semi-rigid side-chain polymers. According to the invention, the monomeric units of rigid side-chain and/or semi-rigid side-chain polymers are, preferably in the melt, polycondensated together with monofunctionalized and/or difunctionalized, cyclic dicarboxylic acid anhydrides to form polymers having anhydride terminal and/or side groups. The formed polyester anhydrides are reacted with the hydroxyl groups and/or with the ester groups of meltable linear polyesters in order to form side-chain grafted, rigid side-chain and/or semi-rigid side-chained polymers and, together with meltable polyesters, they form molecularly reinforced blends. These blends can be shaped into filaments or fibers having a high orientation of the reinforcing polymer or they serve as compatibility mediators in blends consisting of a polyester matrix and of rigid side-chain and/or semi-rigid side-chain polymers. The filaments are used, in particular, in technical fields or in the carpet industry.
摘要:
The invention relates to a method for producing shaped bodies, especially threads or foils, from at least one polymer of the groups consisting of polysaccharide, polysaccharide derivative or polyvinyl alcohol by forming a solution of the polymer that contains an additive in a solvent containing amine-N-oxide, extruding the solution and precipitating the extrudate by contacting with a coagulant. The invention is characterized in that at least two polymeric solutions are formed. At least one of the two polymeric solutions contains one or more finely distributed additives and the at least two polymeric solutions are simultaneously extruded forming a combined extrudate.
摘要:
For production of a seamless edible cellulose tubing from underivatized cellulose, a solution of the underivatized cellulose in tertiary amine N-oxide, of additives and water, is extruded as tubing from an annular die and conducted through an air gap into a water bath. The cellulose tubing is conducted out of the water bath, cleaned by spraying with heated water and thereafter passed through at least two wash sections and a plasticizing section. After exit from the plasticizing section, the wet cellulose tubing is predried in the laid-flat state, before it is dried to its final moisture. The predryer 13 is arranged vertically or horizontally and consists of an insulated tube to which is fed air heated by a heat exchanger in an accurately metered amount and at a constant temperature of up to 130° C. The main dryer 19 is arranged horizontally and contains tangentially and radially directed air nozzles, the air jets of which keep the inflated cellulose tubing 20 suspended during the drying operation.
摘要:
The invention relates to tubular, edible food casings which include cellulose, at least one protein and at least one filler in which the ratio of the wet tear strength in the transverse direction to the wet tear strength in the longitudinal direction is from 1.3:1 to 1:3.5. The casing is gathered to form a shirred stick which is particularly suitable for processing on high-speed stuffing machines. The sticks can be deshirred and stuffed with sausage meat emulsion without difficulty on the stuffing horn. The sticks are particularly suitable in the production of cooked-meat sausages and scalded-emulsion sausages and frying sausages, especially small sausages in which the casing is co-consumed.