Boron nitride based processing aids

Savvas G. Hatzikiriakos; Nimish Rathod

Korea-Australia Rheology Journal, Vol.15, No.4, 173-178, December, 2003

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Boron nitride based processing aids

Savvas G. Hatzikiriakos^†, and Nimish Rathod

Department of Chemical and Biological Engineering, The University of British Columbia, 2216 Main Mall Vancouver, BC, V6T 1Z4, Canada

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Boron nitride is a new processing aid that is capable of eliminating gross melt fracture in several polymer processing operations. Its combinations with other processing aids i.e. fluoropolymers offer additional possibilities of obtaining enhanced processing aids that may take the processes to rates not realized before. A variety of different such combinations are discussed in this paper. The essential componenets are (1) boron nitride capable of eliminating gross melt fracture and (2) suitable lubricant capable of eliminating surface melt fracture such as stearates for the polyolefin processing and polyethylenes for the processing of fluoropolymers.

Keywords:melt fracture;processing aid;boron nitride;fluoroelastomer;fluoropolymer;polyethylene;stearates

[References]

Achilleos EC, Georgiou G, Hatzikiriakos SG, J. Vinyl Additive Technol., 8, 7 (2002)
Bird RB, Armstrong RC, Hassager O, Dynamics of Polymeric Liquids, John Wiley & Sons, NY (1987)
Buckmaster Md, Henry DL, Randa SK, U.S. Patent, Issued to E.I. Dupont de Nemours & Co., Inc. (1996)
Hatzikiriakos SG, Rathod N, Extrusion Aid Combinations, U.S. Patent, Pending (2003)
Kazatchkov IB, Yip F, Hatzikiriakos SG, Rheol. Acta, 39(6), 583 (2000)
Larson RG, Rheol. Acta, 31, 213 (1992)
Lee SM, Kim JG, Lee JW, The effect of boron nitride on the processability of metallocene based LLDPE, ANTEC2000, Soc. Plastics Engrs, 46, 2862-2866, New York, NY, U.S.A. (2000)
Lee SM, Lee JW, The effect of boron nitride on the rheological properties and processability of polyethylene, ANTEC2001, Soc. Plastics Engrs, 45, 1223-1227, New York, NY, U.S.A. (2001)
Petrie CJS, Denn MM, AIChE J., 22, 209 (1976)
Piau JM, El-Kissi N, Tremblay B, J. Non-Newton. Fluid Mech., 34, 145 (1990)
Ramamurthy AV, J. Rheol., 30, 337 (1986)
Rosenbaum E, Hatzikiriakos SG, Stewart CW, Int. Polym. Process., 10(3), 204 (1995)
Rozenbaoum EE, Randa SK, Hatzikiriakos SG, Stewart CW, Henry DL, Buckmaster MD, A New Processing Additive in the Extrusion of Fluoropolymers, ANTEC 98, Soc. Plastics, Engrs, Tech. Papers, 44, 952-956 (1998)
Rosenbaum EE, Randa SK, Hatzikiriakos SG, Stewart CW, Henry DL, Buckmaster M, Polym. Eng. Sci., 40(1), 179 (2000)
Tordella JP, Rheology, Vol. 5, F.R. Eirich, ed., Academic Press, NY, 57-92 (1969)
Vinogradov GV, Malkin AY, Rheology of Polymers, Mir, Moscow, Springer, Berlin (1980)
Yip F, Rosenbaum EE, Randa SK, Hatzikiriakos SG, Stewart CW, The effect of boron nitride type and concentration on the rheology and processability of molten polymers, ANTEC 99, Soc. Plastics Engrs, Tech. Papers, 45, 1223, NY, U.S.A. (1999)
Yip F, Hatzikiriakos SG, Clere TM, J. Vinyl Additive Technol., 6, 113 (2000)
Yip F, Hatzikiriakos SG, Clere TM, New boron nitride processing aids for the extrusion of molten polymers, ANTEC 2000, Soc. Plastics Engrs, 46, 2852-2857, Orlando, FL (2000)

[1] Achilleos EC, Georgiou G, Hatzikiriakos SG, J. Vinyl Additive Technol., 8, 7 (2002)

[2] Bird RB, Armstrong RC, Hassager O, Dynamics of Polymeric Liquids, John Wiley & Sons, NY (1987)

[3] Buckmaster Md, Henry DL, Randa SK, U.S. Patent, Issued to E.I. Dupont de Nemours & Co., Inc. (1996)

[4] Hatzikiriakos SG, Rathod N, Extrusion Aid Combinations, U.S. Patent, Pending (2003)

[5] Kazatchkov IB, Yip F, Hatzikiriakos SG, Rheol. Acta, 39(6), 583 (2000)

[6] Larson RG, Rheol. Acta, 31, 213 (1992)

[7] Lee SM, Kim JG, Lee JW, The effect of boron nitride on the processability of metallocene based LLDPE, ANTEC2000, Soc. Plastics Engrs, 46, 2862-2866, New York, NY, U.S.A. (2000)

[8] Lee SM, Lee JW, The effect of boron nitride on the rheological properties and processability of polyethylene, ANTEC2001, Soc. Plastics Engrs, 45, 1223-1227, New York, NY, U.S.A. (2001)

[9] Petrie CJS, Denn MM, AIChE J., 22, 209 (1976)

[10] Piau JM, El-Kissi N, Tremblay B, J. Non-Newton. Fluid Mech., 34, 145 (1990)

[11] Ramamurthy AV, J. Rheol., 30, 337 (1986)

[12] Rosenbaum E, Hatzikiriakos SG, Stewart CW, Int. Polym. Process., 10(3), 204 (1995)

[13] Rozenbaoum EE, Randa SK, Hatzikiriakos SG, Stewart CW, Henry DL, Buckmaster MD, A New Processing Additive in the Extrusion of Fluoropolymers, ANTEC 98, Soc. Plastics, Engrs, Tech. Papers, 44, 952-956 (1998)

[14] Rosenbaum EE, Randa SK, Hatzikiriakos SG, Stewart CW, Henry DL, Buckmaster M, Polym. Eng. Sci., 40(1), 179 (2000)

[15] Tordella JP, Rheology, Vol. 5, F.R. Eirich, ed., Academic Press, NY, 57-92 (1969)

[16] Vinogradov GV, Malkin AY, Rheology of Polymers, Mir, Moscow, Springer, Berlin (1980)

[17] Yip F, Rosenbaum EE, Randa SK, Hatzikiriakos SG, Stewart CW, The effect of boron nitride type and concentration on the rheology and processability of molten polymers, ANTEC 99, Soc. Plastics Engrs, Tech. Papers, 45, 1223, NY, U.S.A. (1999)

[18] Yip F, Hatzikiriakos SG, Clere TM, J. Vinyl Additive Technol., 6, 113 (2000)

[19] Yip F, Hatzikiriakos SG, Clere TM, New boron nitride processing aids for the extrusion of molten polymers, ANTEC 2000, Soc. Plastics Engrs, 46, 2852-2857, Orlando, FL (2000)