Chevron Phillips Chemical Company LP

Chevron Phillips Cheimcal Company, LP

Clifford C Pettey

Charlie Rees

Carleton E Stouffer

Chen-Youn Sue

Michael J Hanner

Paul M Hunt

Ken E Bowen

The present invention discloses multilayer blown films for shrink label and related applications. These multilayer blown films can comprise a core layer containing an ethylene polymer, and inner and outer layers containing conjugated diene monovinylarene block copolymers.

Multilayer blown films for shrink applications

Compositions, processes, and methods are provided relating to styrenic polymers, including high impact polystyrene (HIPS), also referred to as rubber-modified polystyrene. In one aspect, a process is provided for making high impact polystyrenes, comprising the steps of combining a monovinylarene component, a monovinylarene-conjugated diene block copolymer, and a conjugated diene polymer. In another aspect, the feed components form an emulsion having a continuous phase and a dispersed phase. The continuous phase comprises at least a portion of the monovinylarene component and at least a portion of the conjugated diene polymer. The dispersed phase is suspended within the continuous phase, and comprises globules having at least a portion of the monovinylarene-conjugated diene block copolymer, a remaining portion of the monovinylarene component, and a remaining portion of the conjugated diene polymer. The monovinylarene component is polymerized in the presence of the emulsion alone or in the presence of other feedstocks.

Process for making high impact strength polystyrene and related compositions

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Fleming, OH, United States of America

Clifford C Pettey