DA 3303 E hostanox P-EPQ 09.07 RZ

More documents

Recommendations

Info

Conclusion Hostanox ® * P-<strong>EPQ</strong> ® has to be considered as the additive of choice in applications of polypropylene where superior stabilization is required. Particularly in clarified or nucleated polypropylene, the use of Hostanox P-<strong>EPQ</strong> safeguards excellent melt and color stability during processing of the resin. 6 Experimental Third-generation polypropylene random copolymer was melt compounded with the respective additive formulations. The following base stabilization (BS) was used: 0.1 % calcium stearate plus 0.05 % AO-2. Processing stabilizers (PS) were applied at 0.1 % and nucleating agents (NA) at a level of 0.25 %. Preparation of the Samples Additives were dry blended with the polymer and pre-extruded at 210 °C. Multiple extrusions were carried out on a single screw laboratory extruder (compression ratio 1:3, L:D = 25, 50 rpm). The strand was chilled in water and pelletized. These samples were used for MFR characterization, reprocessing and for injection molding into 100 x 100 x 1 mm3 plaques on an Arburg Allrounder 221-75-350 at 245 °C.
Mode of Characterization Melt Flow Ratio (MFR) according to ASTM D-1238 (equivalent to ISO 1133) using pelletized polymer. Yellowness Index (YI) according to ASTM D-1925 measuring light reflection on 1 mm plaques. Haze Value according to ASTM D-1003 measuring light scattering through 1 mm plaques. Tensile Strength (TS) according to DIN 53455 applying a crosshead speed of 10 cm/min. The specimens for tensile testing were punched out of 1 mm injection moulded plaques. Crystallization Onset Temperature (COT) measured on Mettler DSG. Temperature (COT) 20 thermoanalyzer. Starting temperature 200 °C, cooling rate -10 °C/min. Key to Abbreviations AO-2: Tetrakis-[methylene-3-(3',5'di-tert-butyl-4'-hydroxy-phenyl)propionate]-methane P-2: Tris(2,4-di-tert-butylphenyl) phosphite P-4: Tris(nonylphenyl) phosphite (TNPP) Heterogeneous Nucleators Hostanox ® * 4030: Aluminium-monohydroxy-di- (4-tert-butyl-benzoate) NA-3: Sodium-di-(4-tert-butyl-phenyl) phosphate Homogeneous Nucleators NA-1: 1,3:2,4 Di-benzylidene sorbitol (DBS) NA-2: 1,3:2,4 Di-(4-methyl-benzylidene) sorbitol 7
Page 1 and 2: Pigments & Additives Division Plast
Page 3 and 4: Nucleating Properties of Hostanox P
Page 5: Yellowness Index (on Plaques) 5 4 3

DA 3303 E hostanox P-EPQ 09.07 RZ

Create successful ePaper yourself

Delete template?

Save as template?