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Injection moldable FR‐HIPS formulations based on blends of chlorinated wax and non diphenyl oxide (DPO)‐brominated flame retardant in conjunction with metal oxide/metal sulfide synergists
Author(s) -
Siddhamalli Sridhar K.,
Lee Victor W.
Publication year - 1998
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.10028
Subject(s) - antimony trioxide , fire retardant , materials science , wax , oxide , antimony oxide , sulfide , chemical engineering , polystyrene , composite material , waste management , polymer , metallurgy , engineering
A Response Surface Methodology (RSM) approach was used in performing a D‐Optimal mixture design of experiments of injection moldable fire retarded High Impact Polystyrene (FR‐HIPS) formulated with blends of Chlorez 700 SSNP (chlorinated paraffin wax) and FR‐1808 (octabromotrimethylphenyl indane, a non diphenyl oxide, brominated flame retardant that is considered more environmentally acceptable than decabromo diphenyl oxide flame retardant) in synergistic combination with antimony trioxide/zinc sulfide (white pigment) blends. An optimum processing region was identified from the viewpoint of product performance (burn time to meet UL‐94 V‐O @ 1.6 mm specification without affecting significantly other attractive physical properties) and economics that is dictated by the price of FR additives. This study has demonstrated that use of DOE offers an important benefit in formulation development and that a large number of factors can be evaluated in a relatively small number of experimental runs.