Celanese Gmbh

Hoechst Celanese Corporation

John R Costanza

George L Collins

Anthony B Conciatori

Ronald N DeMartino

Richard Vicari

Balaram B Gupta

O Richard Hughes

Louis E Trapasso

Nelson R Lazear

Ronald R Lamonte

Henry A Terwedow, Jr

Ralph M Miano

Arthur M Goldstein

Ellsworth E Faust

A polyarylate is formed by reacting a mixture of a diester of a dihydric phenol, at least one aromatic dicarboxylic acid and an inert diluent comprising a poly(fluorinated alkylene oxide). Polyarylates of improvided color can be formed and the diluent can be easily separated from the polyarylate and reaction byproducts.

Preparation of poly(arylate) using a non-solvent

A process is described for producing shapable aromatic polyesters derived from bisphenol A and a dicarboxylic acid comprising isophthalic acid, terephthalic acid, or a mixture of the two, comprising forming a mixed anhydride of said dicarboxylic acid and acetic acid, and subsequently reacting said mixed anhydride with bisphenol A while drawing off acetic acid by-product to obtain said aromatic polyester.

Process for producing aromatic polyesters

Greenbodies are produced by a RIM injection molding process wherein a homogeneous mixture of finely divided ceramic or metallic material and a polymerizable monomeric binder is injected into a mold and held at an elevated temperature for a sufficient time to polymerize the binder and form the greenbody. A preferred monomeric binder includes di- and tri-acrylate or -methacrylate esters of polyols. The low viscosity of the monomeric binder allows a loading of ceramic material of greater than 50 vol. % without adversely affecting the ability to injection mold the mixture.

Reaction injection molding of ceramic or metallic greenbodies

An emulsifiable concentrate of Imidan, an acrylic resin, a surfactant and a common organic solvent functions as a controlled release insecticide when applied to plant foliage.

Controlled release insecticide composition

Thermosetting resin coatings are provided which cure rapidly and exothermically at ambient temperatures. Accelerated crosslinking is accomplished by the reaction of oxalic acid esters with amine-containing polymeric compositions.

Amine containing resin with oxalate esters for casting

The use of acrylate or methacrylate esters of polyalkylene oxide derivatives of alkyl/aryl phenols as wetting agents and adhesion promoters in ultraviolet curable systems is disclosed. These materials may be added to the ultraviolet system in a quantity between about 5 and 50 weight percent, based on the total weight of the ultraviolet curable composition.

Acrylate or methacrylate esters of alkylene oxide adducts of alkyl/aryl

This invention provides a process for preparing self-pigmented ultraviolet cured coating compositions, which involves preparing a dispersion of water in certain polyunsaturated ultraviolet curable monomers at a solids level of about 35 to about 85 weight percent, applying the dispersion as a coating on a substrate and curing the substrate coating by exposure to ultraviolet light. These cured compositions have utility as self-pigmented protective coatings.

Radiation cured microvoid coatings

The preparation of rapidly curable ultraviolet coating compositions utilizing, in addition to standard photoinitiators, an aromatic sulfide is disclosed. Utilized in conjunction with the aromatic sulfide may be a triplet state sensitizer, such as a fused ring aromatic compound.

Ultraviolet photoinitiator systems utilizing aromatic sulfides and

This invention relates to the irradiation of compositions comprising non-ethylenically unsaturated brominated and chlorinated aromatic polyester fibrous materials with low intensity ultraviolet light radiation for relatively brief periods of time under appropriate conditions to yield a product of enhanced solvent resistance. The irradiation of the halogenated polyesters (as defined) generates free radicals within the fibrous material which react to produce sufficient cross-linking to enhance solvent resistance without a significant detrimental change of other product properties.

Production of solvent resistant brominated and/or chlorinated aromatic

The use of an aliphatic saturated ether as a promoter to insure complete polymerization of residual unsaturation in ultraviolet curable coating compositions is disclosed.

Completely polymerized ultraviolet cured coatings

An improved ultraviolet curable coating composition particularly useful with titanium dioxide pigmented systems is disclosed containing about 5 to about 85 percent, by weight, based on the total ultraviolet curable composition, of an alpha beta ethylenically unsaturated vinyl polymerizable compound containing at least about 2 sites of alpha beta ethylenic unsaturation, up to about 50 percent, by weight, of an alpha beta ethylenically unsaturated vinyl polymerizable compound containing a single site of alpha beta ethylenic unsaturation, about 0.05 to about 15 percent, by weight, on the same basis, of an ultraviolet photoinitiator, and about 5 to about 50 percent, by weight, of a polyacrylate or methacrylate ester of a polyhalogenated polyol.

Polyunsaturated halogenated monomers for use in ultraviolet coating

This invention provides novel highly acidic gels of polygalactomannan allyl ether gum and sulfur dioxide. The gels exhibit dimensional stability, and are useful for oil well acidizing and borehole plugging, and for the preparation of explosive slurries.

Polygalactomannan allyl ether gels

There is disclosed a process for utilizing titanium dioxide pigments in ultraviolet coating compositions. Basically, the process involves forming a vinyl aqueous emulsion in the presence of titanium dioxide pigments; precipitating and drying the titanium dioxide-polymeric emulsion and adding the dried precipitate as pigment to an ultraviolet curable coating composition.

Polymerized titanium dioxide for ultraviolet coatings

There is disclosed a direct roll coating technique whereby a continuously revolving silk screen is interposed between the roll coating roll and the substrate to be coated. This silk screen serves to eliminate ridges which are usually formed when a direct roll coater is used. This technique is of special usefulness where ultraviolet curing of the coating on the substrate is contemplated.

Continuous silk screen with direct roll coater

An improved process for applying an ultraviolet curable coating to tin free steel is disclosed in this invention, whereby prior to applying the main ultraviolet curable composition, a thin pre-coating of a monomer containing at least one ultraviolet polymerizable site of alpha beta ethylenic unsaturation and at least two carbonyl groups is first applied to the surface to be coated, to a thickness of at least about 10.sup..sup.-3 microns, and heated at temperatures ranging from 50.degree. to 125.degree. C. for 5-25 minutes. Following this step, an ultraviolet curable coating composition is applied and cured.

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North Plainfield, NJ, United States of America

John R Costanza