摘要:
A process for fluid phase in-line blending of plasticized polymers is provided. The process includes providing two or more reactor trains configured in parallel and a separator for product blending and product-feed separation, wherein one or more of the reactor trains produces one or more polymers and one or more of the reactor trains produces one or more plasticizers; contacting in at least one of the parallel reactor trains olefin monomers, catalyst systems, optional comonomers, optional scavengers, and optional diluents or solvents, at a temperature above the solid-fluid phase transition temperature of the polymerization system and a pressure no lower than 10 MPa below the cloud point pressure of the polymerization system and less than 1500 MPa; forming a reactor effluent including a homogeneous fluid phase polymer-monomer mixture and plasticizer-monomer mixture in each parallel reactor train; passing the reactor effluents through the separator; maintaining the temperature and pressure within the separator above the solid-fluid phase transition point but below the cloud point pressure and temperature to form a fluid-fluid two-phase system including a plasticized polymer-rich blend phase and a monomer-rich phase; and separating the monomer-rich phase from the plasticized polymer-rich blend phase. The polymer-rich blend phase is conveyed to a downstream finishing stage for further monomer stripping, drying and/or pelletizing to form a plasticized polymer product blend. Suitable plasticizers for in-line production and blending include polyalphaolefin oligomers, polybutenes, low glass transition temperature polymers and combinations thereof.
摘要:
A process for fluid phase in-line blending of plasticized polymers is provided. The process includes providing two or more reactor trains configured in parallel and a separator for product blending and product-feed separation, wherein one or more of the reactor trains produces one or more polymers and one or more of the reactor trains produces one or more plasticizers; contacting in at least one of the parallel reactor trains olefin monomers, catalyst systems, optional comonomers, optional scavengers, and optional diluents or solvents, at a temperature above the solid-fluid phase transition temperature of the polymerization system and a pressure no lower than 10 MPa below the cloud point pressure of the polymerization system and less than 1500 MPa; forming a reactor effluent including a homogeneous fluid phase polymer-monomer mixture and plasticizer-monomer mixture in each parallel reactor train; passing the reactor effluents through the separator; maintaining the temperature and pressure within the separator above the solid-fluid phase transition point but below the cloud point pressure and temperature to form a fluid-fluid two-phase system including a plasticized polymer-rich blend phase and a monomer-rich phase; and separating the monomer-rich phase from the plasticized polymer-rich blend phase. The polymer-rich blend phase is conveyed to a downstream finishing stage for further monomer stripping, drying and/or pelletizing to form a plasticized polymer product blend. Suitable plasticizers for in-line production and blending include polyalphaolefin oligomers, polybutenes, low glass transition temperature polymers and combinations thereof.
摘要:
Plastic toughened plastics include a polymer composition having a polypropylene component and a second polymer component. The polypropylene component is present in an amount from about 50 to about 95 weight percent based on the total weight of the blend. The second polymer component is present in an amount from about 5 to about 50 weight percent based on the total weight of the blend, is a BOCD or BCD blend of at least two ssPE components, and has an overall density greater than about 0.90 g/cm3. Optionally, the plastic toughened plastics include one or more third polymer component selected from propylene-olefin elastomers and ethylene-propylene rubbers, which are present in an amount from about 1 to about 50 weight percent, based on the total weight of the blend.
摘要:
Plastic toughened plastics include a polymer composition having a polypropylene component and a second polymer component. The polypropylene component is present in an amount from about 50 to about 95 weight percent based on the total weight of the blend. The second polymer component is present in an amount from about 5 to about 50 weight percent based on the total weight of the blend, is a BOCD or BCD blend of at least two ssPE components, and has an overall density greater than about 0.90 g/cm3. Optionally, the plastic toughened plastics include one or more third polymer component selected from propylene-olefin elastomers and ethylene-propylene rubbers, which are present in an amount from about 1 to about 50 weight percent, based on the total weight of the blend.
摘要:
This invention relates to a polymer composition comprising a blend comprising: (a) greater than 30 wt (based upon the weight of the composition) of a cyclic olefin polymer having a Tg greater than 60° C. and having a Tm heat of fusion (ΔHf) of 40 J/g or less selected from the group consisting of: i) copolymers comprising at least one acyclic olefin and at least 15 mole % of one or more cyclic olefins; ii) partially or completely hydrogenated copolymers comprising at least one acyclic olefin and at least 15 mole % of one or more cyclic olefins; iii) metathesis copolymers comprising two or more cyclic olefins; iv) partially or completely hydrogenated metathesis copolymers comprising two or more cyclic olefins; v) metathesis homopolymers comprising cyclic olefins; vi) partially or completely hydrogenated metathesis homopolymers comprising cyclic olefins; and vii) mixtures thereof; (b) from 1 to 50 wt % (based upon the weight of the composition) of an acyclic olefin polymer modifier having a glass transition temperature of less than 0° C.; (c) from 0.1 to 50 wt % (based upon the weight of the composition) of a non-functionalized plasticizer having a kinematic viscosity at 100° C. of 3 to 3000 cSt, a viscosity index of 120 or more, a pour point of 0° C. or less and a flash point of 200° C. or more.
摘要:
An elastomeric composition and method for making the same are provided. The composition can include a rubber component comprising one or more ethylene-propylene elastomers, one or more peroxide curing agents and one or more non-functionalized plasticizers having a viscosity index of 120 or more.
摘要:
Functional polymer compositions and methods of forming such compositions are provided. The functional polymer compositions include at least 50 wt % of one or more polymer components; from 0.1 to 50 wt % of one or more fluids; and from 1 to 50 wt % of one or more active substrates. The combination of one or more fluids and one or more active substrates provides an article from such polymer composition with one or more special functional effects selected from moisturizing, anti-bacterial, disinfecting, anti-viral, anti-mildew, anti-mold, anti-fungal, anti-microbial, moisture/odor absorbing, fragrancing, insect repelling, anti-static and combinations thereof. The one or more fluids and one or more active substrates are released to the surface of polymer based articles. The functional polymer compositions are suitable for a wide range of end use applications including woven and non-woven fabrics.
摘要:
A high strength, flexible crosslinked polyethylene (PEX) material is provided wherein the base polymer is intermixed with a polymer modifier which affects the amorphous region of the polymer, leaving the crystalline portion of the base polymer virtually unaffected. Consequently, the amorphous region's density is lowered, resulting in a more flexible final product, while the crosslinked molecular structure and/or crystalline portion of the polymer, which controls the strength of the base polymer, remains strong. The polymer modifier can comprise a hydrocarbon fluid such as PAO, Group III basestocks, or a gas-to-liquid hydrocarbon. A method for producing the plastic material is also provided. The plastic material has particular utility in the production of tubing, piping, and conduits for transporting gases, liquids, and the like, as well as wire and cable coatings such as jacketing and insulation.