Polyolefin composition with poly(phenylene ether) filler and article thereof
a polyethylene ether and polymer technology, applied in the field of polyethylene ether composition with polyethylene ether filler and article thereof, can solve the problems of low practical end use temperature of polyethylene, loss of mechanical properties above glass transition temperature,
Active Publication Date: 2015-06-18
SABIC GLOBAL TECH BV
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Benefits of technology
This patent describes a composition that includes a polyolefin, an oligomeric poly(phenylene ether), and a compatibilizer. The composition has improved processability and impact strength. Another embodiment of the patent describes an article made from the described composition. The technical effects of this patent are improved processing and impact performance of polymer compositions.
Problems solved by technology
Polyethylene is not a high-performance plastic.
Therefore it tends to lose its mechanical properties above its glass transition temperature.
Thus polyethylene has a low practical end use temperature.
However, polypropylene has poor UV stability, and UV stabilizers must be used for outdoor applications.
However the use of inorganic fillers leads to increases in specific gravity and adversely affects melt flow properties, elongation, and impact strength.
However, other properties, such as elongation, impact strength, and melt flow, can be adversely affected by blending poly(phenylene ether)s with polyolefins.
Method used
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embodiment 1
[0060]A composition comprising: 65 to 97.5 weight percent of a polyolefin; 2.5 to 25 weight percent of an oligomeric poly(phenylene ether) having an intrinsic viscosity of 0.01 to 0.15 deciliters per gram, as measured in chloroform at 25° C.; and 0 to 10 weight percent of a compatibilizer; wherein all weight percents are based on the combined weight of the polyolefin, the poly(phenylene ether), and the compatibilizer.
embodiment 2
[0061]The composition of embodiment 1, wherein the oligomeric poly(phenylene ether) has a weight average molecular weight of 1,000 to 10,000 atomic mass units, as measured by gel permeation chromatography.
embodiment 3
[0062]The composition of embodiment 1 or 2, wherein the oligomeric poly(phenylene ether) comprises poly(2,6-dimethyl-4-phenylene ether).
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Abstract
Polyolefin compositions having improved properties comprise oligomeric poly(phenylene ether) as an organic filler. The composition comprises specific amounts of polyolefin, oligomeric poly(phenylene ether), and optionally a compatibilizer. The polyolefin can be a polyethylene homopolymer, an ethylene-containing copolymer, a polypropylene homopolymer, a polypropylene-containing copolymer, or a combination thereof. The oligomeric poly(phenylene ether) can be monofunctional or bifunctional. The compositions can have increased flexural modulus, heat deformation resistance, and flame resistance, compared to compositions without the oligomeric poly(phenylene ether). A compatibilizer can partially restore elongation when high levels of oligomeric poly(phenylene ether) are present.
Description
BACKGROUND OF THE INVENTION[0001]Polyethylene is a versatile and inexpensive plastic that is used in the highest volume of any plastic. Polyethylene has toughness, near zero moisture absorption, excellent electrical insulating properties, low coefficient of friction, and is easily processed. Specialty grades of polyethylene include low density polyethylene (LDPE), medium density (MDPE), and many others. For example, LDPE is used in food packaging film, including stretch and shrink wrap; for plastic bags such as grocery bags, laundry and dry cleaning bags; for extruded wire and cable insulation; and for bottles, closures, and toys.[0002]Polyethylene is not a high-performance plastic. Polyethylene, which is semi-crystalline, has a low glass transition temperature and crystalline melting point. Therefore it tends to lose its mechanical properties above its glass transition temperature. For example, polyethylene can have a low heat deflection temperature. Thus polyethylene has a low pra...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C08L23/12C08L23/06
CPCC08L23/06C08L23/12C08L71/12C08L53/025C08K3/016C08K5/0066C08L27/18C08L2666/84C08L2201/02
InventorLEVASALMI, JUHA-MATTIBALFOUR, KIM G.
OwnerSABIC GLOBAL TECH BV