Hoechst Celanese Corporation

Celanese Gmbh

Celanese Acetate Limited

Alkaril Chemicals, Inc.

Norman S Anderson

Albert L Promislow

John D Gibbon

Edward J Powers

M Ishaq Haider

Randy L Rayborn

Gerard Lees

Gunilla E Gillberg-La Force

Anthony W Yankowsky

Rastko Vukov

Albert J Promislow

The invention is directed to LCP monofilaments and yarn made therefrom which have improved adhesion properties, said monofilaments, and yarn made therefrom, comprising a liquid crystalline polymer filament having a finish selected from the group consisting of esters formed between (a) pentaerythritol and saturated polyols of up to 10 carbon atoms and 2 to 6 hydroxyl groups, and (b) a carboxylic acid of formula C.sub.x H.sub.2x=1 COOH, wherein x is from 2 to 20, and wherein 2 to 6 of the hydroxy functions are converted to ester functions. In a preferred embodiment of the invention the finish is an ester formed from the reaction of pentaerythritol and a carboxylic acid of formula C.sub.x H.sub.2x=1 COOH, wherein x is from 2 to 20, and preferably between 14 and 20. The most preferred esters are pentaerythritol tetrapelargonate and pentaerythritol tetraisostearate.

Liquid crystalline polymer monofilaments having improved adhesion

Organic polymer surfaces are modified by contacting such surfaces with a haloester compound and a cationic compound of having a pK.sub.a &gt;5. Preferably the organic polymer is selected from the group consisting of polyesters, aromatic polyamides, and graphitic polymers and the contacting is conducted at an elevated temperature.

Organic polymers having a modified surface and process therefor

Organic polymer surfaces are modified by contacting such surfaces with a halohydroxy compound and a cationic compound of a volatile acid having a pK.sub.a &gt;2.5. Preferably the organic polymer is selected from the group consisting of polyesters, aromatic polyamides and graphitic polymers and the contacting is conducted at an elevated temperature.

Organic polymers having a surface modified with haloester polymers

Organic polymer surfaces are modified by contacting such surfaces with a halohydroxy compound and a cationic compound of an acid having a pK.sub.a &gt;2.5. Preferably the organic polymer is selected from the group consisting of polyesters, aromatic polyamides, polyimides, and graphitic polymers and the contacting is conducted at an elevated temperature.

A composition for the adhesive activation of polymeric material. The composition is comprised of a non-resinous quaternary ammonium salt of a polyepoxide wherein the nitrogen atom of the ammonium group is bonded directly to a carbon atom of the polyepoxide and wherein the composition is substantially free of free amine. The composition may be used as a spin finish or topcoat composition and is particularly useful in the preparation of polyethylene terephthalate tire cord which is ultimately incorporated into rubber.

Polyester yarn and adhesively activated with a quaternary ammonium salt

A halogenated polyether is provided having a chemical structure which has been found to possess the requisite characteristics for satisfactory service as a promoter of good adhesion between a polymeric surface (e.g., a polyethylene terephthalate tire cord) and an elastomeric material (e.g., rubber). The halogenated polyether may be formed by (1) the reaction of an organic polyhydroxy compound with epihalohydrin (e.g., epichlorohydrin) to create ether linkages, (2) the epoxidation of the ends of the ether chains which extend from the residual portion of the organic polyhydroxy compound, and (3) the substantial hydrolysis of the epoxy groups (as described). The resulting halogenated polyether is substantially free of epoxy groups, contains at least one 2-halomethyloxyethylene unit, and contains 2,3-dihydroxypropyl end groups (as described). Such halogenated polyether optionally may be provided in the form of an oligomer (as described). The novel compounds when handled are not believed to require the cumbersome worker protection measures which are commonly being utilized when epoxy compounds are employed in similar end uses.

Novel polyether containing at least one 2-halomethyloxyethylene unit and

The aging period for chemically stabilized, adhesive activated polyester material can be reduced by contacting the material before it is substantially drawn or stretched with a composition containing a defined epoxide compound catalyzed with ions of at least one of potassium, cesium, rubidium or ammonium at a pH of between about 7.5 to about 13.0. The composition preferably also contains chloride, bromide or iodide ions which stabilizes the pH and/or an amine which improves adhesion to rubber.

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Charlotte, NC, United States of America

Norman S Anderson