The Dow Chemical Company

James A Allen

David P Flores

Gerald M Lancaster

George W Knight

Morris S Edmondson

Ricky L Tabor

Tu-Anh Pham

Randall S Shipley

Osborne K McKinney

Walter L Vaughn

Succinic acid or succinic anhydride grafts of HDPE are blended with LLDPE, especially ethylene/1-octene copolymers, to form blends having useful adhesive properties at elevated temperatures. The succinic acid or succinic anhydride groups are provided by grafting, respectively, maleic acid or maleic anhydride onto HDPE. The resin blends are useful for coating metal foil substrates. The adhesion of the resin blend to the metal foil substrate is particularly good at elevated temperatures (e.g., temperatures above about 60.degree. C.).

Resin blends of maleic anhydride grafts of olefin polymers for extrusion

Carbon monoxide-containing ethylene polymers are blended with vinyl alcohol polymers, including vinyl alcohol homopolymers and copolymers, to prepare oxygen barrier resins having good processability.

Oxygen barrier resins

Succinic acid or succinic anhydride grafts of HDPE are blended with ungrafted LLDPE and with ungrafted LDPE to form blends having useful adhesive properties. The succinic acid or succinic anhydride groups are provided by grafting, respectively, maleic acid or maleic anhydride onto HDPE. Laminates of the blends on various metals and polymers are shown.

Maleic anhydride grafts of olefin polymers

Blends of linear low density polyethylene (LLDPE) with ethylene/acrylic acid copolymer (E/AA) are prepared which exhibit improved optical, impact, heat-seal, and anti-blocking properties as compared to the E/AA copolymer alone.

Blends of ethylene/acrylic acid copolymers with linear low density

Carbon monoxide-containing polymers are disclosed which are heatable with high frequency (HF) electromagnetic radiation, including RF-frequencies and MW-frequencies, and which are used in imparting RF-sealability in structures, packaging material, laminates, and the like, including, e.g., multi-wall bags or containers, and co-extruded laminates.

Co-extruded laminates containing carbon monoxide interpolymers

Olefin polymers which are unsuited, or ill-suited, for heating, sealing, or bonding by the action of high-frequency electromagnetic radiation, especially microwave radiation, are rendered heatable by such radiation by incorporating carbon monoxide, as a comonomer, into the polymer structure. Novel adhesives comprising terpolymers of ethylene/carbon monoxide/acids are disclosed, where the acid moiety of the terpolymer is at least one carboxylic acid which is polymerizable through carbon-to-carbon unsaturation, and salts thereof.

High-frequency heatable plastics

Olefin polymers which are unsuited, or ill-suited, for heating, sealing, or bonding by the action of high-frequency electromagnetic radiation, especially microwave radiation, are rendered heatable by such radiation by incorporating carbon monoxide, as a comonomer, into the polymer structure.

The blocking characteristics of ethylene interpolymers containing --COOH groups are reduced by treating such polymers with a solution of an inorganic compound of a Group I-A metal such as trisodium phosphate and an organic compound of a Group I-A metal such as sodium acetate or a combination thereof.

Method for reducing block of ethylene interpolymers containing --COOH

Transition metal-derived coordination catalyst residues are neutralized by contacting with a pseudo-polyester material such as calcium stearoyl lactylate, which is comprised of a metal salt of a condensation reaction product of a fatty acid and a hydroxyl-containing acid.

Neutralizing polyethylene catalyst residues

Extrusion-cast films of high molecular weight, linear, low density ethylene copolymers which inherently have high block and high cling characteristics are compounded with a minor amount of a low molecular weight organic, such as a polyglycol, before being extrusion-cast as a thin film, the low molecular weight organic serving to substantially reduce the block, but retaining high cling characteristics.

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Lake Jackson, TX, United States of America

James A Allen