Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

BLEND COMPOSITIONS COMPRISING SUBSTANTIALLY RANDOM ETHYLENE/VINYL AROMATIC MONOMER INTERPOLYMERS AND AROMATIC POLYETHERS

IP.com Disclosure Number: IPCOM000016462D
Publication Date: 2003-Jun-23
Document File: 4 page(s) / 39K

Publishing Venue

The IP.com Prior Art Database

Abstract

Blend compositions comprising (a) substantially random interpolymers of alpha-olefin/vinyl aromatic monomers and (b) aromatic polyethers are disclosed in United States Patent Number 6201067. The specific combination of one or more interpolymers having relatively high comonomer styrene contents with low molecular weight aromatic polyethers, and the potential utility of these blends in a range of applications are the subjects of this disclosure. Low molecular weight aromatic polyethers can have certain desirable attributes as blend components in combination with substantially random interpolymers, for example in providing improved processability of these blend systems.

This text was extracted from a Microsoft Word document.
This is the abbreviated version, containing approximately 27% of the total text.

BLEND COMPOSITIONS COMPRISING SUBSTANTIALLY RANDOM ETHYLENE/VINYL AROMATIC MONOMER INTERPOLYMERS AND AROMATIC POLYETHERS

Blend compositions comprising (a) substantially random interpolymers of a-olefin/vinyl aromatic monomers and (b) aromatic polyethers are disclosed in United States Patent Number 6201067. The specific combination of one or more interpolymers having relatively high comonomer styrene contents with low molecular weight aromatic polyethers, and the potential utility of these blends in a range of applications are the subjects of this disclosure. Low molecular weight aromatic polyethers can have certain desirable attributes as blend components in combination with substantially random interpolymers, for example in providing improved processability of these blend systems.

The terms copolymer and interpolymer are used interchangeably in this disclosure. The term "substantially random" includes copolymers and interpolymers such as described in United States patent number 5,703,187, United States patent number 5,872,201, copolymers of ethylene and styrene produced by bridged metallocene catalysts such as those described in United States patent number 5,652,315 and also copolymers of ethylene and styrene as described by Arai, Toshiaki and Suzuki (Polymer Preprints, Am. Chem. Soc., Div. Polym. Chem.) Volume 38, pages 349, 350 [1997]).

The polymer blend compositions of interest comprise:

(A)  1 to 99 weight percent of one or more substantially random interpolymers, wherein the interpolymers comprise:

(i)                  ethylene

(ii)                1 to 65 mol%, preferably 15 to 60 mol%, and more preferably 25 to 50 mol% of one or more vinyl aromatic monomers. The vinyl aromatic monomers include styrene and para-methyl styrene

(iii)               optionally one or more additional copolymerizable monomers, including dienes, norbornene and substituted norbornenes, and C3 to C20 olefin monomers, exemplified by a-olefin monomers including propylene, 4-methyl 1-pentene, butene-1, pentene-1, hexene-1 or octene-1.

Interpolymers of particular interest include ethylene/styrene (E/S) copolymers and ethylene/styrene/propylene (E/S/P) terpolymers prepared by solution polymerization techniques, employing single-site constrained geometry catalysts.

(B)  1 to 99 weight percent of one or more aromatic polyethers, especially poly(2,6-dimethyl-1,4-phenylene ether) (PPE), having a relatively low degree of polymerization (number average molecular weight, Mn < 30,000).

(C)  Optional formulation components include:

(i)                  up to 98 weight percent of one or more styrene homopolymers or copolymers, such as polystyrene or high impact polystyrene.

(ii)                up to 50 weight percent of one or more impact modifiers, such as styrenic block copolymers or ethylene/α-olefin elastomers.

(iii)               up to 90 weight percent of one or more fillers.

It is considered that the blend combination of interpolymers with low molecular weight PPE will be of utility when combined with additional polymers, especially polyolefins (including ethyle...