Abstract: A thermally-responsive indicating device comprising a housing which defines a cavity therein, an indicating means in said cavity, a biasing means in said cavity, and a class of nitrogen-containing organic locking means in said cavity, wherein said locking means is adapted to fuse at a predetermined temperature.

Abstract: Polyhalogenated copolyethers containing recurring units of the formula ##STR1## WHEREIN X is halogen selected from Br and Cl, m and n are each integers of 1 to 4 and each Q is selected from --CH.sub.2 --, ##STR2## wherein not more than 75 mole % of the Q groups are ##STR3## said polyether having a weight average degree of polymerization of at least 50 and an inherent viscosity of at least 0.2.

Abstract: Coating compositions for polymeric substrates which reduce or eliminate dripping of the substrates by forming a cohesive, intumescent, adherent char during exposure to flame. The coating compositions comprise halogenated polymers containing oxacyclobutane units, especially the polycondensation product of tetrahalobisphenol and bishaloalkyl oxetane monomers.

Abstract: Polyhalogenated aromatic copolymers and the intermediate 3,3-bis(polyhalophenoxymethyl)oxetanes and 2,2-bis(polyhalophenoxymethyl)-1,3-propanediols.

Abstract: A novel class of chain-coupling compounds for polyesterification reactions which are represented by the formula: ##EQU1## wherein R is an organic radical which will not render the chain-coupling compound thermally unstable at about 280.degree.C, andX is an inert substituentAre added to polyesterification reaction mixtures after initiation of the reaction to produce novel polyesters containing a residue of the chain-coupling compound bound into the polymer chain. Reduced polymerization times and improved thermal stability can be obtained through use of these chain-coupling compounds.

Abstract: Addition of polycarboxylic chain coupling compounds of the formula: ##SPC1##To a polyesterification reaction mixture of at least one polyol and at least one polycarboxylic compound (other than the polycarboxylic chain coupling compound) after polyesterification has begun increases the polymerization rate and does not diminish physical properties of the polyester.