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Showing 1 to 20 of 41 for “"flame retardant"”.
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Phase selective flame-retardant laminates
… the limitations of coating adhesion by applying flame retardants (FRs) directly into the top layer of the laminate based on this same polymer - polybutylene terephthalate (PBT), which provides strong interfacial bonding between layers. Three potentially synergistic FR systems – Boehmite/Melamine …
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Analysis of patent data for flame-retardant plastics additives
… and applied to a set of patents that refer to flame retardants. The claims section of a patent is presented as a graph, with individual claims as points and references between claims as lines connecting those points.
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Void-Free Flame Retardant Phenolic Networks: Properties and Processability
… composite industry because of their excellent flame retardance and cost effectiveness. However, the common procedure for curing phenolic novolac resins uses hexamethylenetetramine (HMTA) and releases volatiles during the cure, which produce networks with numerous voids. This results in …
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Relationships between polymer additive molecular structure and intumescent flame retardant behaviour.
… and their ability to confer intumescent flame retardant properties on the resulting polymers. The development of intumescent fire retardants is discussed along with the principles of flame retardancy in general. Much of the work centred around the chemistry of a key starting material, …
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Estrogenic Activity of the Polybrominated Diphenyl Ether Flame Retardant Mixture DE-71
… diphenyl ethers (PBDEs) are widely used flame retardants suspected to act as endocrine disruptors. We tested the commercial PBDE mixture DE-71 and its in vivo metabolites for estrogenic activity. MCF-7 breast cancer cells culture, ERE-luciferase gene expression, 3H-β-estradiol …
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Development of eco-friendly flame retardant fabric using phosphorus based intumescence chemistry
<p>The research aims at developing Eco-friendly flame retardant textile fabric using phosphorous based intumescence chemistry. Phosphorous in the structure of Spirocyclic pentaerythriol diphosphoryl chloride (SPDPC) acts as the main group to impart flame retardancy. Intermediate compounds were …
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Mg-Al Layered Double Hydroxide: A Potential Nanofiller and Flame-Retardant for Polyethylene
… hydroxide (LDH) as a potential nanofiller and flame-retardant for polymers with special reference to polyethylene. LDH is a mixed hydroxide of di- and trivalent metal ions that crystallizes in the form of mineral brucite. The basic reason for selecting LDH or more specifically …
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The Chemistry of Dimethacrylate-Styrene Networks and Development of Flame Retardant, Halogen-Free Fiber Reinforced Vinyl Ester Composites
… vinyl ester composites exhibiting good flame properties was of interest. Flame retardant vinyl ester resins are used by many industries for applications requiring good thermal resistance. The current flame-retardant technology is dependent on brominated vinyl esters, which generate high …
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Novel Novolac-Phthalonitrile and Siloxane-Phthalonitrile Resins cured with low melting Novolac Oligomers for Flame Retardant Structural Thermosets
… and heated at elevated temperatures to produce flame resistant three-dimensional networks.
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Consumer attitudes about the importance of flame retardant legislation for clothing in relation to socio-economic class and parental status
… were most likely to know about existing flame retardant (FR) standards and to consider FR apparel as "very important" for all ages of children, and adults, 65 years and over. They were least likely to desire FR standards on clothing for adults, ages 15 through 64. Lower-middle class women …
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The incorporation of a chelating agent into a flame retardant finish on a cotton flannelette and the evaluation of selected fabric properties
… the ability to include a chelating agent in a flame retardant finish without altering the non-flammable properties; and 2) to determine the effect of the chelating agent on flame retardant fabrics washed in hard water with soap. Major findings of the research include the following: 1) …
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THE IDENTIFICATION AND QUANTIFICATION OF ORGANOPHOSPHATE FLAME RETARDANTS IN RAW MATERIALS UTILIZED IN POLYURETHANE PRODUCTION
<p>Flame retardant additives are utilized in various polyurethane applications to comply with industry and flammability standards. Federal regulations and restrictive standards continue to tighten controls on certain impurities found in flame retardant blends. These restrictions include the …
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Characterisation of Halogen Free Fire Retardant Polypropylene Composites Reinforced by Short Natural Fibres
… bromine or chlorine are extremely active fire retardant elements in the gas phase of the combustion process, but with the worldwide stringent fire regulation policies, the governments have been pressured to ban or severely restrict the use of halogens with their serious health related and …
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Aplicação de métodos experimentais alternativos para avaliação da retardância à chama em madeiras
Evaluates experimentally the flame retardancy of woods by means of test methods not adopted by the current Brazilian flammability classification of materials. So, a phosphorus-based flame retardant was applied on the surface of samples of E. dunnii, P. elliottii and MDF. The evaluation of …
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Developmental Toxicity of Organophosphate-Based Flame Retardants
… mixture known as PentaBDE was once the primary flame retardant (FR) used in the US to comply with California's Technical Bulletin 117 (TB117) - a mandated flammability standard for polyurethane foam within upholstered furniture and baby products. In 2004, due to concerns about persistence, …
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Nanoenhanced Polyurea As A Blast Resistant Coating For Concrete Masonry Walls
… many available protective coatings are not flame retardant. This thesis focuses on nanoenhanced polyurea for applications in improving blast resistance, while possessing improved flame retardancy, of concrete masonry walls. The polyurea that is being researched is enhanced with nanoadditives …
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Preparación de nuevos nanocomposites multifuncionales de matriz epoxi basados en el empleo de materiales grafénicos
… properties, due to the incorporation of fire retardant reagents (FRs) and GRMs with synergistic effect. The key points to achieve good results have been the optimization of the dispersion processes at different loads and the composites processing. Regarding GRMs, their presence in the epoxy …
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The study of the degradation of hexabromocyclododecane in a heterogeneous system containing Fe(II) adsorbed to the iron oxide Hematite.
… (HBCDD), a widely used brominated flame retardant, was studied in a heterogenous mixture containing reactive Fe(II) adsorbed to the iron oxide hematite. The adsorbed Fe(II)/iron oxide system has shown to be a potent reductant in the transformation of organic contaminants with …
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Design of microstrip antenna based on different material properties
… is to design a microstrip antenna by using Flame Retardant 4 (FR4) substrate and Roger 4350 substrate which will be operating in Wireless Local Area Network (WLAN). The frequency chosen for the microstrip antenna is 2.4GHz and it has been chosen from IEEE 802.11 which is for the Wireless …
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Bandpass filter design with spurious frequency reduction capability
… of to 7GHz has been simulated and fabricated on Flame Retardant 4 (FR4) substrate by using etching process. Significant spurious suppression up to 33.23dB is measured at 5.96GHz.
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