Celanese Gmbh

Hoechst Celanese Corporation

Rajal M Kusumgar

Carl A Amond

James L Paul

Michael F Froix

Andrew H DiEdwardo

K M Natarajan

An electrically conductive polyacetal molding resin composition having improved flexibility and impact strength is provided by formulating an oxymethylene polymer, an electrically conductive carbon black having a surface area, BET N.sub.2 of greater than 1,200 m.sup.2 /g and a pore volume, DBP absorption of greater than 500 cc/100 g, and an elastomeric polyurethane.

Conductive polyacetal composition exhibiting improved flexibility and

The printability of oxymethylene polymers such as by the heat transfer of sublimable dyes is improved by the addition of an amorphous or partially crystalline polymer to the oxymethylene polymer molding composition.

Printable polyacetal compositions

The invention relates to polyoxymethylene molding composition exhibiting improved toughness and containing from about 50 to about 95 wt. % of a polyoxymethylene, from about 5 to about 40 wt. % of a multiphase composite interpolymer and from about 0.05 to about 5.0 wt. % of a reactive titanate, such as neoalkoxy, tri(n-ethylaminoethylamino) titanate, based on the total weight of the composition and based on 100% reactivity of the reactive titanate.

Polyoxymethylene molding compositions exhibiting improved toughness

The invention relates to acetal polymer molding compositions having improved impact strength and containing lower amounts than the acetal polymer of a thermoplastic polyurethane, e.g. a polyether- or polyester- based polyurethane, and a multiphase composite interpolymer, e.g. comprising an elastomeric acrylic phase onto which is grafted a rigid thermoplastic polymeric phase. The composition is preferably blended at a shear rate of less than about 5000 sec.sup.-1.

Acetal polymer compositions having improved impact strength

An oxymethylene polymer which is modified with 1,2-polybutadiene is provided which exhibits enhanced physical properties, including tensile impact, elongation, and work to break. The oxymethylene polymer may be a homopolymer, consisting essentially of recurring oxymethylene groups, or a copolymer (as described).

Oxymethylene polymer modified with 1,2-polybutadiene exhibiting enhanced

A polymer blend comprising a first copolymer and a second copolymer and having improved impact resistance is provided. The first copolymer has recurring units which consist essentially of oxymethylene groups having the formula --OCH.sub.2 --interspersed with ##STR1## groups, where each R.sub.1 and R.sub.2 is selected from the group consisting of hydrogen, lower alkyl radicals, and halogen-substituted lower alkyl radicals, each R.sub.3 is selected from the group consisting of methylene, oxymethylene, lower alkyl and haloalkyl substituted methylene, and lower alkyl and haloalkyl substituted oxymethylene radicals, and n is an integer from zero to three, each lower alkyl radical having one to two carbon atoms. The oxymethylene units comprise approximately 85 to approximately 99.9 mole percent of the recurring units of the first copolymer. The second copolymer has recurring units which consist essentially of oxymethylene groups having the formula--OCH.sub.2 --interspersed with ##STR2## groups where R.sub.1, R.sub.2, R.sub.3, and n have the same meanings as the corresponding symbols used with regard to the first copolymer and where the selections made with regard to the second copolymer are independent of the selections made with regard to the first copolymer, the oxymethylene groups of the second copolymer comprising approximately 50 to approximately 75 mole percent of the recurring units of the second copolymer. The second copolymer comprises approximately 1.5 to approximately 40 weight percent of the blend.

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Livingston, NJ, United States of America

Rajal M Kusumgar