摘要:
A polymeric composition having improved melt extrusion properties comprising: A) an olefin polymer; B) a catalyst neutralizer comprising a cationic derivative of a poly(oxyalkylene) compound; and C) a processing additive composition comprising a fluoropolymer and optionally, an interfacial agent.
摘要:
Durable stretch fabrics are made and processed from one or more inelastic and one or more elastic fibers, for example, a substantially linear, homogeneously branched ethylene polymer. The fabrics can be made by any process, such as, weaving, knitting, etc., and from any combination of crosslinked, heat-resistant olefin elastic and inelastic ('hard') fibers, for example, cotton and wool. These fabrics exhibit excellent chemical, resistance (for example chlorine or caustic resistance) and durability, that is they retain their shape and feel ('hand') over repeated exposure to processing conditions, such as stone-washing, dye-stripping, PET-dyeing and the like, and service conditions, such as washing, drying, etc.
摘要:
A polymeric composition having improved melt extrusion properties comprising: A) an olefin polymer; B) a catalyst neutralizer comprising a cationic derivative of a poly(oxyalkylene) compound; and C) a processing additive composition comprising a fluoropolymer and optionally, an interfacial agent.
摘要:
The present invention includes a process of preparing a coupled polymer by heating an admixture containing (1) at least one elastomer comprising ethylene and at least one comonomer which is selected from alpha olefins having at least 3 carbon atoms, dienes and combinations thereof and (2) a coupling amount at least one poly(sulfonyl azide) to at least the decomposition temperature of the poly(sulfonyl azide) for a period sufficient for decomposition of at least 80 weight percent of the poly(sulfonyl azide) and sufficient to result in a coupled polymer having a gel content of less than 2 weight percent. The elastomer preferably comprises ethylene, and alpha olefin of at least three carbon atoms and optionally at least one diene and preferably has a density of at least 0.850 and up to 0.90 g/mL. The poly(sulfonyl azide) and elastomer preferably react at a temperature at least the decomposition temperature and greather than 150 °C.
摘要:
This invention relates to a method of making a film-fabric composite (including a film-fabric laminate) wherein the fabric is characterized as having improved tensile elongation (without rupture). In particular, the invention pertains to a method of making a film-fabric laminate having structural elastic-like behavior wherein the fabric is a nonwoven thermally bonded fabric characterized as having improved high strain rate tensile elongation and comprises a plurality of fibers comprised of at least one polypropylene polymer and at least one ethylene polymer, wherein the method comprises stretching the laminate at a high strain rate. The improved fabric is characterized by higher high strain rate tensile properties and a broader bond window which is also shifted to substantially lower temperatures with regard to maximum tensile properties. The improved fabric enables higher stretching levels or speeds on stretching apparati often employed to impart elasticity or elastic-like behavior to inelastic polymeric materials. Polypropylene copolymers as well as polypropylene homopolymers may be used in the invention which is useful for durable and disposable articles such as diapers, bandages, pantiliners, continence pads, and sanitary napkins.
摘要:
The instant invention is a high-density polyethylene composition, method of producing the same, articles made therefrom, and method of making such articles. The high- density polyethylene composition according to instant invention includes a first component, a second component, and a third component. The first component is a high-density polyethylene polymer having a density in the range of 0.940 to 0.980 g/cm3. The second component is polyethylene glycol, and the third component is octadecyl 3-(3,5-di-tert-butyl- 4-hydroxyphenyl)propionate. The high-density polyethylene composition of the instant invention has a Yellowness Index of less than about -2.5 at 0 hour of accelerated aging at 1000C. according to ASTM D-6290. The process for producing the high-density polyethylene composition according to instant invention includes the following steps: (1) providing a first component, wherein the first component is a high-density polyethylene polymer having a density in the range of 0.940 to 0.980 g/cm3; (2) providing a second component, wherein the second component is polyethylene glycol; (3) providing a third component, wherein the third component is octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate; (4) blending the second and third components into the first component thereby forming a blend; (5) pelletizing the blend; and (6) thereby forming pellets of the high-density polyethylene composition having a Yellowness Index of less than about -2.5 at 0 hour of accelerated aging at 100 0C. according to ASTM D-6290. Articles according to instant invention comprises the above- described inventive high-density polyethylene composition.
摘要:
The present invention relates to a method of making improved polyolefinic elastic articles from cured, irradiated or crosslinked amorphous ethylene interpolymers. In particular, the invention relates to a method of making a shaped article (e.g. film or fiber) characterized by improved elevated temperature elasticity as well as washability and dryability. The inventive elastic article comprises a substantially cured, irradiated, or crosslinked (or curable, irradiated or crosslinkable) homogeneously branched ethylene interpolymer characterized as having a density less than 0.90 g/cm3 and containing at least one nitrogen-containing stabilizer. The improved elastic article of the present invention is particularly suitable for use in applications where good elasticity must be maintained at elevated temperatures and after laundering such as, for example, elastic waist bands of undergarments and other clothing.
摘要:
Stabilized polyethylene materials which offer an advantageously balanced combination of thermal, mechanical and processing properties, and which maintain their physical properties in chlorinated water environments are disclosed. The materials include an antioxidant system with components to provide extraction resistance in hot water environments and additionally provides oxidation resistance to both chlorine in the water interior of the pipe and oxygen in contact with the pipe's exterior.