Celanese Gmbh

Nelson R Lazear

Robert W Stackman

Anthony B Conciatori

John R Costanza

The present invention is directed to a process for rendering a normally hydrophobic polyolefinic open celled microporous film relatively permanently hydrophilic, improving the water flow rate therethrough, and reducing the electrical resistance thereof by chemically fixing a controlled amount of at least one hydrophilic organic hydrocarbon monomer to the surface of the micropores of the film with ionizing radiation. The amount of hydrophilic monomer which is chemically fixed to the surface of the micropores is controlled to avoid plugging of the pores subsequent to the radiation treatment.

Hydrophilic monomer treated microporous films and process

There is disclosed a pressure sensitive adhesive composition having improved adhesive strength and tack. This adhesive composition comprises three terpolymers, each terpolymer comprising an alkyl acrylate wherein the alkyl group contains four to fourteen carbon atoms, a vinyl ester of a saturated carboxylic acid having from one to six carbon atoms, and an ethylenically unsaturated carboxylic acid having three to five carbon atoms. The composition of terpolymers comprises a mixture of three of the terpolymers described above wherein each individual terpolymer has a different number average molecular weight. The final terpolymer composition has a specifically defined number average molecular weight, and a specifically defined molecular weight distribution.

Pressure sensitive adhesive compositions comprising a mixture of

An improved process and product for use in ultraviolet curable pressure-sensitive adhesives is disclosed. The product, a standard ultraviolet curable pressure-sensitive adhesive to which has been added a benzoin C.sub.1 -C.sub.12 hydrocarbon alkyl ether and a triplet state sensitizer, exhibits adhesive strength properties which are substantially greater than those of prior art systems.

Ultraviolet initiator systems for pressure-sensitive adhesives

Photocurable polyester resin compositions are provided which are adapted for use in coating applications. The polyester resin compositions are air-uninhibited and are low energy photocurable at room temperature as substantially 100% solids systems. The photocurable polyester resin compositions are cured by exposure to activating light, without the necessity of incorporating any additional ingredients in the polyester compositions. Each photocurable polyester resin composition comprises a prepolymer(A) containing maleate and/or fumarate groups, and allyl ether groups; a solvent(B) which is a non-volatile polymerizable ester of acrylic or methacrylic acid derivative; and an organic polymerization initiator(C) which is photosensitive in the presence of oxygen.

Polyester resin compositions which are photocurable in the presence of

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.

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Chatham, NJ, United States of America

Nelson R Lazear