Showing papers on "Plastomer published in 2007"

Scratch and mar resistant polymer compositions, methods for making and articles made from the same

Abstract: Provided is a polymer composition comprising a thermoplastic, an ethylene alpha-olefin plastomer, a fibrous inosilicate and a slip agent. The polymer composition exhibits superior scratch and mar resistance as indicated by a Ford Five Finger scratch resistance on Ford Fawn 2ZK grain of at least 15 N. Also provided are shaped articles made from the polymer compositions. Also provided are methods for making scratch and mar resistant polymer compositions. Finally, articles made from the polymer compositions are also provided, particularly automotive exterior, interior and fascia parts, requiring scratch and mar resistance.

Effects of ultrasonic oscillations on rheological behavior and mechanical properties of novel propylene‐based plastomers

Abstract: The effects of ultrasonic oscillations on the die pressure, productivity of extrusion, melt apparent viscosity, melt surface appearance, and die swell of novel propylene-based plastomers were studied in a specially designed ultrasonic oscillations extrusion system developed in our laboratory. The effects of ultrasonic oscillations on molecular weights, tensile strength, and dynamic mechanical properties of extrudates were also studied. The experimental results showed that the presence of ultrasonic oscillations during extrusion could significantly increase the productivity of plastomers at the same die pressure, and reduce die swell and melt fracture such as sharkskin at a given screw rotation speed. The die pressure and apparent viscosity of plastomers remarkably decreased with increasing ultrasonic intensity. Introduction of ultrasonic oscillations into plastomer melts can improve their processibility. The possible mechanism for ultrasonic improvement of rheological behavior was also proposed in this article. Under certain conditions, ultrasound-assisted extrusion could slightly decrease the glass transition temperature (Tg) and storage modulus of plastomers due to the minor reduction in molecular weights, but showed no significant impact on yield strength and strength at break. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007

Polyolefin based peelable seals

Abstract: The invention relates to a polyolefin-based heat sealable and peelable seal having improved haze values. The peelable seals comprise from about 45 to about 55 percent by weight of a propylene based plastomer or elastomer and.from about 45 to about 55 percent by weight of low density polyethylene. Such peelable seals exhibit total haze values of less than about 8 percent, based on a film thickness of 50 microns.

Flame-retardant thermoplastic resin composition and its molded article

Abstract: PROBLEM TO BE SOLVED: To provide a flame-retardant thermoplastic resin composition which is free from the deterioration of physical properties even when a large amount of an inorganic flame retardant is incorporated, is excellent in heat resistance and low temperature resistance and also is excellent in the processability for insulation displacement contact. SOLUTION: The flame-retardant thermoplastic resin composition is prepared by melting/kneading (A) 100 pts.mass of a thermoplastic resin component, (B) 120-300 pts.mass of an inorganic flame retardant, (C) 0.001-2 pts.mass of an organic peroxide, (D) 0-4 pts.mass of a (meth)acrylate-based and/or allyl-based crosslinking aid and (E) 0-2 mass% of a silane coupling agent based on the amount of the component (B), at a temperature of the 1-minute half-life temperature of the organic peroxide (C) or higher. The above thermoplastic resin component (A) comprises (a) 10-80 mass% of a propylene-based elastomer and/or propylene-based plastomer, (b) 10-80 mass% of a crystalline propylene-based resin and (c) 5-25 mass% of other components. COPYRIGHT: (C)2008,JPO&INPIT

Bitumen composition and use thereof

Abstract: Bitumen composition for built structure seals, especially roofing membranes, based on plastomer bitumen are very soft at high temperatures because they possess a poor tread resistance, while such bitumen compositions have a low flexibility at low temperatures. Therefore, known bitumen compositions have to be provided with a comparatively large amount of APP, APAO or IPP. Through the addition only of small amounts of high-boiling saturated hydrocarbons (flux oil) and paraffins, the invention achieves elimination of the disadvantages of plastomer bitumen, without the proportion of expensive APP, APAO or IPP having to be increased for this purpose.

The resin composition from used thermoplasic olefin resin

Abstract: Provided is a waste thermoplastic olefinic resin-containing composition, which has excellent weather resistance, allows molding in a complicated mold structure or into an injection molded component, shows improved physical properties, and is applicable to car wheel guards. The waste thermoplastic olefinic resin-containing composition comprises: 30-50 wt% of a waste olefinic resin having a melt index of 10-20 g/10 min.; 20-50 wt% of a highly crystalline polypropylene resin having a melt index of 100-250 g/ 10 min.; 1-40 wt% of a copolypropylene resin; and 3-9 wt% of a polypropylene-polyethylene copolymer plastomer. The resin composition optionally further comprises a thermal stabilizer, weather resistance stabilizer or a mixture thereof.