Ticona Gmbh

Hoechst Celanese Corporation

Bruce M Mulholland

Kirsten Markgraf

Michael D Golder

Ursula Ziegler

Mark Allen Tyler

Dan Murena

Joachim Floeck

Coralie Adéle Richard

The polymer composition containing a polyamide resin, a metallic pigment, and a carrier is disclosed that exhibits a metallic appearance.

Polyamide composition containing a metallic pigment

A shaped part that is formed from a polymer composition that contains a liquid crystalline polymer and a black pigment is provided. By selectively controlling the type and relative concentration of these components, the polymer composition and shaped parts formed therefrom can have a dark black appearance, and yet still exhibit good thermal and mechanical properties at high temperatures.

Liquid crystalline composition having a dark black color

A polymer composition is disclosed containing a coupling agent and an impact modifier that renders the composition resistant to ultraviolet light degradation. The polymer composition contains an aliphatic coupling agent, an aliphatic impact modifier, or both an aliphatic coupling agent and an aliphatic impact modifier. The polymer composition is well suited to producing molded articles, especially articles that will later be exposed to substantial amounts of ultraviolet light. For example, molded articles made according to the present disclosure are well suited for use on the interior of vehicles where the parts are not only exposed to ultraviolet light, but are also exposed to repeated thermal cycles.

Impact modified polyoxymethylene composition and articles made therefrom that are stable when exposed to ultraviolet light

Polymer compositions are described that contain at least two different immiscible phases for producing molded articles having a swirl-like or marble-like appearance. The first phase, for instance, may contain one or more polyoxymethylene polymers. The second phase, on the other hand, contains one or more polymers that together have a melting point that is from about 5&#xb0; to about 30&#xb0; different than the melting point of the polyoxymethylene polymer. In one embodiment, the second phase may contain a thermoplastic elastomer, a glycol-modified polyethylene terephthalate, or a polyimide and may have a melting point that is higher than the melting point of the polyoxymethylene polymer. The second phase is present in the polymer composition in relatively low amounts, such as in amounts less than about 5% by weight. The second phase can contain a high concentration of colorants that creates a contrast of colors when the molded article is produced.

Molded articles having a swirl-like or marble-like appearance and compositions for producing same

The present invention relates to a composition comprising a) at least one polyoxymethylene (A) having terminal OH-groups of more than 15 mmol/kg, b) at least one coupling agent (B), c) one or more hindered amine light stabilizer (C) having a molecular weight ranging from 500 to 1000 g/mol, and d) optionally at least one reinforcing fiber (D).

Weather resistant polyoxymethylene compositions

A polymeric composition containing a polyacetal resin in conjunction with a blend of metal salts for reducing formaldehyde emissions. In one embodiment, the blend of metal salts comprises a metal salt of a fatty acid blended with a metal salt of a polycarboxylic acid. The metal salt of the fatty acid may comprise calcium propionate, while the metal salt of the polycarboxylic acid may comprise calcium citrate. The metal salts have been found to reduce formaldehyde emissions, especially when the composition contains a low gloss additive, such as acrylic polymer particles.

Polyacetal compositions and molded products made therefrom

A polymer composition that contains a liquid crystalline polymer and a pearlescent filler is provided. By selectively controlling the type and relative concentration of these components, the polymer composition and shaped parts formed therefrom can be achieved that have a pearly luster appearance similar to parts plated with metals, such as copper, brass, or bronze.

Liquid crystalline composition having a pearly luster

Polymer compositions are described that contain at least two different immiscible phases for producing molded articles having a swirl-like or marble-like appearance. The first phase, for instance, may contain one or more polyoxymethylene polymers. The second phase, on the other hand, contains one or more polymers that together have a melting point that is from about 5&#xb0; to about 30&#xb0; different than the melting point of the polyoxymethylene polymer. In one embodiment, the second phase may contain a thermoplastic elastomer, a glycol-modified polyethylene terephthalate, or a polyamide and may have a melting point that is higher than the melting point of the polyoxymethylene polymer. The second phase is present in the polymer composition in relatively low amounts, such as in amounts less than about 5% by weight. The second phase can contain a high concentration of colorants that creates a contrast of colors when the molded article is produced.

A polymer composition containing a polyacetal resin, a metallic pigment, and an ultraviolet light stabilizer is disclosed that exhibits a metallic brilliant appearance. The metallic pigment, the ultraviolet light stabilizer and the polyacetal resin can be mixed in a high intensity mixer prior to being used to mold polymer articles.

Polymer composition for producing articles having a metallic appearance

A polymeric composition containing a polyacetal resin in conjunction with a formaldehyde inhibiting agent is described. The formaldehyde inhibiting agent comprises an aluminum pigment. The aluminum pigment may comprise elemental aluminum, such as aluminum flakes that cannot only drastically reduce formaldehyde emissions from the composition but can also give the composition a metallic appearance. In one embodiment, the aluminum pigment may be combined with the polyacetal resin in conjunction with an unhindered phenol and/or a polyethylene resin. In order to further reduce formaldehyde emissions, in one embodiment, a formaldehyde scavenger comprising a nitrogen containing compound can also be added.

Low formaldehyde emission polyacetal composition

Polymeric compositions characterized by containing polymeric acetals and zinc-containing inorganic fillers exhibiting improved resistance to the formation and adhesion of mineral deposits when used in applications wherein the composition is exposed to water containing dissolved minerals for extended periods of time. The composition may be prepared into shaped articles which are useful as mineral resistant, plumbing fixtures.

Polymeric acetals resistant to mineral deposition

Nylon molding compositions, and molded parts formed of the same, include a UV-light stabilization system having between about 0.5 to about 1.0 wt. % of a hindered phenolic antioxidant, between about 0.05 to about 1.5 wt. % of a phosphite compound, between about 0.05 to about 1.5 wt. % of a hindered amine light stabilizer, and optionally, between about 0.05 to about 5.0 wt. % of a benzotriazole UV absorber. The nylon molding compositions and molded parts formed thereof exhibit improved color difference, as calculated in CIELab units under illuminant 'D-65' according to ASTM Standard D-2244, of less than about 1.5 when exposed to 601.6 kJ/m.sup.2 irradiation in a Xenon arc weatherometer operated according to SAE J1885, and improved surface gloss retention characteristics after such irradiation.

Nylon molding compositions exhibiting improved protection against

Polyester molding compositions include an effective amount of a triazine-based antioxidant and a benzophenone ultraviolet light absorber sufficient to achieve a clor difference, as calculated in CIELab units under illuminant 'D-65' according to ASTM Standard D-2244, of less than about 10,0, when exposed in a Xenon arc weather-ometer operated according to SAE J1885 for 315 Kj/sq.m. The triazine-based antioxidant is of the formula: ##STR1## wherein R is a phenolic group attached to the triazine ring via a C1 to C5 alkyl or an ester substituent. Preferably, the triazine-based antioxidant is 3,5-di-tert-butyl-4-hydroxyhydrocinnamic acid triester with 1,3,5-tris-(2-hydroxyethyl)-s-triazine-2,4,6-(1H, 3H, 5H) trione. The benzophenone UV-absorber is of the general formula: ##STR2## where R' is hydrogen or an alkyl radical.

UV-light stabilized polyester molding compositions

A polyoxymethylene composition which exhibits improved stability against the degradative effects of ultraviolet light includes a triazine-based antioxidant and UV stabilizers. One preferred composition of the invention includes, based upon the total weight of the composition, an oxymethylene copolymer, between 0.015 to about 0.4 weight percent of 2,4,6-triamino-sym-triazine (as a formaldehyde scavenger), between about 0.25 to about 1.0 weight percent of each of 2-2(hydroxy-5-t-octylphenyl) benzotriazole, and bis(2,2,6,6-tetramethyl-4-piperidinyl)sebacate as UV light stabilizers, and between about 0.25 to about 1.0 weight percent of 3,5-di-tert-butyl-4-hydroxyhydrocinnamic acid triester with 1,3,5-tris(2-hydroxy-ethyl)-s-triazine-2,4,6-(1H, 3H, 5H)-trione as an antioxidant. Due to their enchanced UV-light stability property, the compositions of the invention find particular utility as molded automobile components.

Growing community of inventors

Union, KY, United States of America

Bruce M Mulholland