Pinfa Newsletter N°20 , June 2012 is now available: click here
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Synergistic Benefits of Metal Hydroxides and Zinc Boratein Flame Retardant Wire and Cable Performance Compounds
Posted on May 30, 2012 by Henri VAHABI
Free download article: pdf format
Abstract
This paper discusses the use of metal hydroxidessuch as magnesium hydroxide or alumina trihydratewith zinc borate for formulating high-performancewire and cable compounds, including the polyolefincompounds for data cable jacketing and automotivewire applications. Results of extensive fireperformance investigations using UL 94 and conecalorimetry are discussed in order to determine theoptimal ratio of borate to metal hydroxide for a givenbase polymer and compound application. Compoundperformance tradeoffs associated with using theMDH and borate fire retardant combination areinvestigated. Enhanced compound performanceusing the unique MDH particles, such as Vertex™100, in combination with Firebrake® ZB-Fine zincborate is illustrated. (source: Scribd)
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Global Flame Retardant Chemicals Market (2012-2017) – Report
Posted on May 15, 2012 by Henri VAHABI
M&M: Today flame retardant chemicals become absolutely indispensible in safeguarding electrical appliances, buildings, vehicles and polymers. Global flame retardant chemicals market is driven by growing safety needs and standards across the world. On the basis of their formulation flame retardants can be classified into five types which includes aluminum trihydrate, antimony oxides, brominated, chlorinated, organo phosphorus and others. Global flame retardant chemicals market is dominated by brominated flame retardants in terms of value and by aluminium trihydrate in terms of volume. They can also be classified on the basic of end application market such as building and construction, electrical and electronics, wires and cables, automobiles and transportation, and others.
This report estimates the market size of the global flame retardants market both in terms of volume and revenue. It discusses market drivers, restraints and challenges, raw material, and product price trends. (Source: click here)
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Newsletter
Posted on May 13, 2012 by Henri VAHABI
Hotline newsletter (Newsletter of Department of Fire Protection Engineering- Univ. Maryland) spring 2012 edition, is now available. (Pdf format: click here)
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Phosphorus Polyester – an Alternative to Low-Molecular-Weight Flame Retardants in Poly(Butylene Terephthalate)?
Posted on May 12, 2012 by Henri VAHABI
This article was published in Macromolecular Chemistry and Physics, 11 May 2012.
Abstract
Pyrolysis, fire behaviour and mechanical properties of a blend of poly(butylene terephthalate) (PBT) with a phosphorus polyester (PET-P-DOPO) are investigated and compared with PBT/aluminium diethylphosphinate (AlPi-Et) composites. The PBT/PET-P-DOPO is immiscible and exhibits gas-phase and condensed-phase activity, whereas AlPi-Et in PBT results mainly in flame inhibition. Only higher loadings of AlPi-Et yield significant condensed-phase activity. Using the same phosphorus content, PBT/PET-P-DOPO and PBT/AlPi-Et exhibit similar reductions in fire load (22%) and flame spread (17% assessed by fire growth rate, FIGRA), compared with PBT. In contrast to AlPi-Et, the addition of PET-P-DOPO does not decrease the tensile strength of PBT. Thus, PET-P-DOPO is an interesting alternative to low-molecular-weight flame retardants.
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Flame retardant renewable thermosets
Posted on May 8, 2012 by Henri VAHABI
This intersting article was published on May 6, 2012 in Polymer Chemistry journal.
Abstract
A novel phosphorus-containing vegetable oil (PETR) was prepared through phospha-Michael addition of a diphenyl phosphine oxide to the enone derivative of high-oleic sunflower oil (ETR). The reaction was investigated using the enone derivative of methyl oleate under conventional thermal heating and microwave irradiation. The kinetic study showed a great enhancement of reaction rate for the microwave-initiated addition. The crosslinking of ETR with diaminodiphenylmethane (DDM) via aza-Michael addition was also investigated under microwave irradiation, showing a noticeable acceleration of the curing. The new phosphorus-containing triglyceride was crosslinked with DDM to obtain phosphorus-containing vegetable oil-based thermosets of different phosphorus contents. Limiting oxygen index values from 26.4 to 35.0 for the final materials were obtained, demonstrating that the flame retardant properties of vegetable oil-based thermosets can be improved by adding covalently bonded phosphorus to the polymer.
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PINFA 4th E&E Workshop : ‘Building the Future for Flame Retardants in E&E’
Posted on May 6, 2012 by Henri VAHABI
The 4th Pinfa E&E Workshop, Building the Future for Flame Retardants in E&E, which will take place on 14th June 2012 in Tokyo (Japan).
Fore more information: Click here
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Flame retardancy of polymers 