Abstract: The present invention relates to a process for coloring polytrimethylene terephthalate fibers by treating the fibers with an aqueous liquor containing at least one dispersing colorant, in the absence of a carrier and the application of pressure. The temperature of the treatment is carried out at or below the boiling point of the liquid, within 20.degree. C. of the boiling point of the liquor. The coloring process begins at a liquor temperature between 20.degree. and 50.degree. C., and the temperature is raised over a period of 20 to 90 minutes. The liquor is then cooled to a temperature between 20.degree. and 50.degree. C., preferably at a rate of cooling of 1.degree. C. per minute, so that at least 95% wt. % of the colorant is absorbed by the fibers, and the dispersing colorant penetrates the fibers to a relative depth of at least 5% with respect to the diameter of the fibers.

Abstract: Heat-curable coating materials having the compositionA) 10-50 wt. % of polyesters consisting ofa) aromatic and aliphatic and/or cycloaliphatic polycarboxylic acids, havingaa) 40-90 mol-% are aromatic polycarboxylic acids andbb) 60-10 mol-% are aliphatic and/or cycloaliphatic polycarboxylic acids, withb) polyols, whereinaa) 30-85 mol-% is neopentyl glycol andbb) >15-<50 mol-% is 1,3-propanediol;B) 5-40 wt. % of cross-linking agentsC) 15-50 wt. % of solvents and optionallyD) pigments andE) conventional paint additives.

Abstract: Use of isophoronediamine isomer mixtures containing more than 40%, preferably more than 50 up to 70%, of the trans-isomer and less than 60%, preferably less than 50 down to 30%, of the cis-isomer as reactant in polyaddition resins selected from epoxy, polyurethane and polyurea resins. As curing agents in epoxy resins compared with previously known isomer mixtures, the isomer mixtures containing more than 40% of the trans-isomer and less than 60% of the cis-isomer unexpectedly lead to an extended pot life with simultaneously reduced maximum curing temperature and therefore reduced shrinkage problems. The isomer mixtures are also surprisingly suitable as amine components with reduced reactivity for the chain extension of polyurethane/polyureas.

Abstract: Aqueous solutions can be doped in a simple, safe and economic manner with acrolein in biocidally effective concentration by converting acrolein acetals in aqueous phase in the presence of a strongly acidic deacetalation catalyst into acrolein, cleaving the alcohol component, constantly removing the formed acrolein from the decetalation mixture and transferring it by means of an inert gas stream or a liquid jet pump with the aqueous solution to be doped as jet fluid into the aqueous solution to be doped.