Abstract: A low temperature process for polymerizing nylon monomers to freely flowing polymers is disclosed. The polymerization process is carried out at lower than conventional polymerization temperatures and produces a freely flowing polymer without thermal degradation.

Abstract: Incorporation of 0.2 to 3.0 weight percent of linear low density polyethylene into polyoxymethylene compositions results in improved elongation for such compositions.

Abstract: Incorporation of 0.05 to 5 weight percent of a microcrystalline or fibrous cellulose having an average particle size of 100 microns or less and 0.05 to 4 weight percent of at least one co-stabilizer compound selected from the group consisting of polyamides and polymers or oligomers containing hydroxy groups into polyacetal molding compositions results in improved thermal stability of such compositions.

Abstract: Incorporation of 0.05 to 5 weight percent of certain microcrystalline or fibrous cellulose polymers into polyacetal molding compositions results in improved thermal stability for such compositions.

Abstract: A stabilizer compound for synthetic resinous materials is a tri-substituted triazine in which each substituent is a N.sup.4 -methylated 2-keto-1,4-diazacyclohexane connected to the triazine ring through an alkylene bridge. This bridge permits efficient methylation of the N.sup.4 atom in every substituent under conditions which yield crystals having at least 90% purity. These crystals may be further purified to at least 95% purity at which purity level they contain less than 500 ppm ash. The stabilization effect of 95% pure compound in a polyacetal is such that, even with an ash content of 50 ppm, it has better stabilization properties than its 99.2% pure precursor (the non-methylated tri-substituted triazine) with an ash content of 10 ppm, as evidenced by lower formaldehyde evolved and better color retention, that is, developing less color in a water white sample after testing at 259.degree. C.

Abstract: Incorporation into polyacetal molding compositions stabilized for processing with a non-meltable polymer stabilizer of 0.01-1.00 weight percent of at least one meltable co-stabilizer, said co-stabilizer being a thermal stabilizer for polyacetal, and 0.02-1.0 weight percent of at least one primary antioxidant results in significantly improved long term stability, as evidenced by greater retention of physical properties over time, of such compositions.

Abstract: Polyacetal compositions containing 0.05 to 5 weight percent of an oxo-piperazinyl-triazine hindered amine light stabilizer wherein the hindered N.sup.4 atom in the piperazinone ring of the stabilizer is alkylated with a metyl, ethyl, or propyl group, said compositions being relatively stable upon exposure to UV light. A polyacetal composition containing a specific oxo-piperazinyl-triazine hindered amine light stabilizer wherein the hindered N.sup.4 atom is not alkylated is shown to be relatively stable upon exposure to UV light. Both compositions possess stability during melt processing and do not significantly lose physical properties upon exposure to heat and light.

Abstract: Incorporation into polyacetal molding compositions stabilized with a non-meltable polymer stabilizer of 0.02-1.0 weight percent of at least one amide-containing phenolic antioxidant results in significantly improved long term stability, as evidenced by greater retention of physical properties over time, of such compositions.