Company News_第4页_Novista Chemicals - The pioneer of Flame retardant

28 2022-5
Nanocomposites as a flame retardant Nanocomposites is a multiphase solid material where one of the phases has one, two or three dimensions of less than 100 nanometres, or structures having nanoscale repeat distances between the different phases that make up the material. Polymer layered-silicate nanocomposites (PLSNs) with silicate enhance mechanical properties, increase heat-distortion temperatures, improve therm…
28 2022-5
Nano materials as a flame retardant Inexpensive nanoclays form 'nano-network' which spread out and dispersed through the host material forming a sort of gauze. The breakdown of material and the release of gas phase combustible molecules are slowed down or even prevented. Nano materials can be used as:a) Nano polymer compositesb) Nanoparticles in traditional back-coatingsc) Deposition of nano coatings on the fabric…
28 2022-5
Intumescent FRs Intumescence is the result of a combination of charring and foaming at the surface of the burning polymer, which protects the underlying material from the action of the heat or flame. Intumescent FRs (IFRs) is often used for applications requiring high levels of flame retardancy. They are highly efficient and low toxic. They provide very robust fire safety and flame resistance p…
21 2022-5
Nitrogen FRs This class consists of pure melamine, melamine derivatives, i.e. salts with organic or inorganic acids such as boric acid, cyanuric acid, phosphoric acid or pyro/poly-phosphoric acid, and melamine homologues. Combinations of nitrogen-based flame retardants such as melamine polyphosphate and metal phosphinates also demonstrated flame retardancy of composites that has repercussion…
21 2022-5
Phosphorous based FRs (PFRs) Phosphorus flame retardants (PFRs) (organic and inorganic) are more environmentally friendly, good thermally stable and have superior performance, resulting from the synergistic effect of P-N. They do not tend to form toxic gases since phosphorus is mostly locked into the char. Phosphorous FRs may be reactive (chemically bound) and additive (physical mixing) [2]. Lanxess [3] has…
21 2022-5
Halogen-based flame retardants (Br-FRs) The Stockholm Convention (2001) listed 23 organo-halogen chemicals (including all BFRs) to be banned globally. The challenges of finding substitutes for banned halogen-containing flame- retardants include:A. Lower flame retardancy: Only 10 wt% of BFRs is equivalent to about 30-50% by wt of inorganic FRsB. High cost: Inorganic FRs is low-cost but require high loading. New HFFRs, …
14 2022-5
WHAT DO FLAME RETARDANTS DO? Flame retardants are a tool that can have a favorable effect on every key fire property, including ignitability, flame spread, heat release, and ease of extinction; albeit they do not necessarily have all of these effects simultaneously in every case. Some examples follow associated with well-known products in actual use where the effectiveness of the appropriate flame retardant…
14 2022-5
Flame Retardants: Background and Effectiveness Fire safety can be achieved by means of active or passive fire protection. Passive fire protection involves using materials or products with superior fire performance so as to either minimize the probability of ignition or, if ignition does occur, minimize the damaging effects of the resulting fire. Flame retardants offer one way of providing passive fire protection.When a combu…
14 2022-5
What is the difference between fire retardant paint and fire retardant coating Fire retardant paint is a kind of flame retardant coating made of film-forming agent, flame retardant, foaming agent and other materials. Fire-retardant coatings, which can be called flame-retardant materials, are composed of coating components such as binders (ie, film-forming substances), pigments, common coating additives, fire-retardant additives, and dispersion media. Excep…
7 2022-5
Some common PA (nylon) flame retardants Halogen/antimony or other flame retardant synergistic systems, halogen-free flame retardant systems based on red phosphorus or melamine. From a quantitative point of view, the halogen/antimony synergistic system is still the most widely used PA flame retardant system. In some parts of Europe and Asia, efforts are underway to find alternatives to halogenated flame retardants. How…