Abstract: Mixtures containing active hydrogen compounds such as polyols and aminoalcohols useful for the production of polyurethane foams and also containing trichlorofluoromethane or 1,1,2-trichloro-1,2,2-trifluoroethane as foam blowing agent, are stabilized against reaction of the active hydrogen compound(s) with the chlorofluorohydrocarbon by incorporating a stabilizing amount of amylene, ortho-(isopropenyl) aniline or diisobutylene.

Abstract: A solvent composition comprising 1,1,1-trichloroethane and a stabilizing amount of an epoxide of formula ##STR1## wherein R.sub.1 and R.sub.2 are hydrogen, alkyl of 1 to 4 carbon atoms, phenyl or benzyl,R.sub.3 is hydrogen or alkyl of 1 to 4 carbon atoms,R.sub.4 is alkyl of 1 to 4 carbon atomsand n is 0 or 1.Preferably the or each alkyl group contains 1 or 2 carbon atoms; examples of useful epoxides are ethyl trans-2,3-epoxybutyrate, ethyl 3,4-epoxy-3-methylvalerate and ethyl beta-methyl-beta-phenylglycidate.

Abstract: A solvent composition for cleaning metal and other articles which comprises 1,1,1-trichloroethane having dissolved therein a stabilizing amount of a mixture of stabilizing components comprising (i) tertiary butanol (ii) nitromethane and (iii) 1-or 2-nitropropane or nitroethane, in which mixture the specified stabilizing components are present in the mole fraction percent ranges encompassed by Contour K in FIG. 1 of the drawings in the case where component (iii) is 1-or 2-nitropropane or by Contour A in FIG. 2 of the drawing in the case where component (iii) is nitroethane.

Abstract: A process for strengthening or toughening a phosphate glass the process comprising contacting the surface of the phosphate glass with a solution of a carboxylic acid in a liquid diluent, the carboxylic acid comprising an amino-carboxylic acid, or a hydroxy-carboxylic acid, or a mixture of an amino-carboxylic acid and a hydroxy-carboxylic acid. Particularly useful is an aqueous solution of an amino-polycarboxylic acid.