White-pigmented, melt-stable ethylene/carboxylic acid copolymer

Details White-pigmented, melt-stable ethylene/carboxylic acid copolymer White-pigmented, melt-stable ethylene/carboxylic acid copolymer

1989-11-14

1991-02-12

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524515, 524522, 524523, 524528, 525221, C08K 910

Patent

active

049924869

ABSTRACT:
A composition stabilized against thermal crosslinking and consequent reduction of its melt index, consisting essentially of a uniform dispersion of alumina-coated titanium dioxide pigment in a blend of a matrix polymer which is a dipolymer of ethylene with an ethylenically unsaturated carboxylic acid or a terpolymer of ethylene with an ethylenically unsaturated carboxylic acid and with another ethylenically unsaturated comonomer, or with carbon dioxide or sulfur dioxide, with a stabilizing polymer which is a high melt index copolymer of ethylene with acrylic or methacrylic acid. Such compositions are useful in melt-fabricating white-pigmented articles such as, e.g., toothpaste tubes and condiment pouches.

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