Microencapsulated fire retardants for polyolefins

Reshetnikov, I. S.; Zubkova, N. S.; Antonov, A. V.; Potapova, Elena; Svistunov, V. S.; Tuganova, M.; Khalturinskij, N.A.

doi:10.1016/s0254-0584(98)80010-2

Cited by 8 publications

(8 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Microencapsulated FRs have attracted more and more attention since the end of the 1990s, and in the initial phase, the materials were used in order to overcome the modification of the textile properties such as softness and drape, to avoid undesirable properties, i.e. their chemical activity, volatility or migration to the polymer surface, and afterwards the application was mostly focused to improve their compatibility with the polymer matrix . The choice of the polymer for the membrane synthesis of the microcapsules is linked to the considered application and the required material processes.…”

Section: Introductionmentioning

confidence: 99%

Thermo‐physical properties of polypropylene fibers containing a microencapsulated flame retardant

Salaün

Creach

Rault

et al. 2012

Polymers for Advanced Techs

View full text Add to dashboard Cite

A microencapsulated flame retardant with a melamine‐formaldehyde shell was prepared by in situ polymerization, then incorporated into an iPP matrix with a coupling agent to manufacture multifilament yarns by melt spinning. The influence of the post‐treatment on the resulted microcapsules with an alcoholic solution was also studied. The spinnability of these formulations based on the interface characterization from contact angle measurements, tensile test and thermal characterizations was explored to determine the maximum draw ratio (DR) to apply. Finally, knitted fabrics were processed from multifilaments, and their flame‐retardant properties were evaluated by performing fire tests according to the FMVSS 302 and Din 4102 part B experiments. The different mechanical and thermal behaviors were discussed in terms of the influence of the DR and the post‐treatment applied on fibers during the spinning process and during the recovery of the microcapsules, respectively. The results showed that it was possible to obtain multifilament yarns with a DR of 4, but the best properties were obtained with a DR of 3 and for un‐treated microcapsules. Furthermore, the samples containing un‐treated microcapsules reach a B rating at the FMVSS test with a fast flame progression and a very low duration of burning. Copyright © 2012 John Wiley & Sons, Ltd.

show abstract

Section: Introductionmentioning

confidence: 99%

Thermo‐physical properties of polypropylene fibers containing a microencapsulated flame retardant

Salaün

Creach

Rault

et al. 2012

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…Microcapsules may be obtained by a series of techniques that involve liquids, gases, or solids in natural or synthetic polymeric membranes [4,5,6,7]. This process is known as microencapsulation, and requires a layer of an encapsulating agent, generally a polymeric material, that acts as a protective film insulating the active substance [8,9,10].…”

Section: Introductionmentioning

confidence: 99%

Vehiculation of Active Principles as a Way to Create Smart and Biofunctional Textiles

et al. 2018

View full text Add to dashboard Cite

In some specific fields of application (e.g., cosmetics, pharmacy), textile substrates need to incorporate sensible molecules (active principles) that can be affected if they are sprayed freely on the surface of fabrics. The effect is not controlled and sometimes this application is consequently neglected. Microencapsulation and functionalization using biocompatible vehicles and polymers has recently been demonstrated as an interesting way to avoid these problems. The use of defined structures (polymers) that protect the active principle allows controlled drug delivery and regulation of the dosing in every specific case. Many authors have studied the use of three different methodologies to incorporate active principles into textile substrates, and assessed their quantitative behavior. Citronella oil, as a natural insect repellent, has been vehicularized with two different protective substances; cyclodextrine (CD), which forms complexes with it, and microcapsules of gelatin-arabic gum. The retention capability of the complexes and microcapsules has been assessed using an in vitro experiment. Structural characteristics have been evaluated using thermogravimetric methods and microscopy. The results show very interesting long-term capability of dosing and promising applications for home use and on clothes in environmental conditions with the need to fight against insects. Ethyl hexyl methoxycinnamate (EHMC) and gallic acid (GA) have both been vehicularized using two liposomic-based structures: Internal wool lipids (IWL) and phosphatidylcholine (PC). They were applied on polyamide and cotton substrates and the delivery assessed. The amount of active principle in the different layers of skin was determined in vitro using a Franz-cell diffusion chamber. The results show many new possibilities for application in skin therapeutics. Biofunctional devices with controlled functionality can be built using textile substrates and vehicles. As has been demonstrated, their behavior can be assessed using in vitro methods that make extrapolation to their final applications possible.

show abstract

“…It is obvious that even if a char has large char height, or excellent heat-shielding properties, but at the same time is easily destructible by mechanical perturbations, the whole fire protection system will be undermined. 5–7,10,11,28–33…”

Section: Introductionmentioning

confidence: 99%

Hydrocarbon time–temperature curve under airjet perturbation: An in situ method to probe char stability and integrity in reactive fire protection coatings

Naik

Duquesne

Bourbigot

2016

Journal of Fire Sciences

View full text Add to dashboard Cite

Intumescent coatings are the present-day state-of-art techniques to protect steel structures and other structural materials from fire hazards. Thermal insulation properties of such protective materials are normally deduced from standard fire tests, however, with least reference to char integrity and strength. This work proposes a simple and resourceful in situ experimental protocol to evaluate char strength of intumescent coatings on steel panels during hydrocarbon time–temperature fire test (at about 1200°C). It is based on in-process monitoring the physical integrity, mechanical stability, and thermal insulation capacity of fully developed char under a stream of air (airjet) before steel plate reaches its critical temperature. A bench-scale furnace designed in our laboratory to reproduce hydrocarbon fire scenario (UL1709) was upgraded to simulate air turbulence to impact the char strength. Silicone- and epoxy-based coatings on steel panels were tested under these conditions. Silicone-based coatings are found to have several interesting advantages over the latter. Furthermore, this protocol was extended to investigate the compositional influence on char strength in a set of silicon-based coatings.

show abstract

Microencapsulated fire retardants for polyolefins

Cited by 8 publications

References 2 publications

Thermo‐physical properties of polypropylene fibers containing a microencapsulated flame retardant

Thermo‐physical properties of polypropylene fibers containing a microencapsulated flame retardant

Vehiculation of Active Principles as a Way to Create Smart and Biofunctional Textiles

Hydrocarbon time–temperature curve under airjet perturbation: An in situ method to probe char stability and integrity in reactive fire protection coatings

Contact Info

Product

Resources

About