FAQ

Please find answer to our frequently asked questions below.  If you can’t find the answers you’re looking for then please contact us and we’ll be happy to help.

 

What resins can I use Phyrolex in?

ThermosetsHMEDMDDPCPPCP based coatings

Unsaturated Polyester

Works Very Wellfaq-verywellDoes Not Workfaq-verywell

Alkyd

Works Very WellIt Should WorkDoes Not Workfaq-verywell

Epoxy

faq-verywellfaq-verywellDoes Not Workfaq-verywell

Amino

Not Enough Data to KnowIt Should WorkWorks Very Wellfaq-verywell

PU

faq-verywellfaq-verywellDoes Not Workfaq-verywell

Polysiloxane

Works Very Wellfaq-verywellDoes Not Workfaq-verywell

 

ThermoplasticsHMEDMDDPCPPCP based coatings

PET

Does Not WorkDoes Not WorkDoes Not Workfaq-verywell

PBT/PTMT

WorksNot Enough Data to KnowDoes Not Workfaq-verywell

HIPS

WorksNot Enough Data to KnowDoes Not Workfaq-verywell

Polyethylene *

It Should WorkIt Should WorkDoes Not Workfaq-verywell

Polypropylene

It Should WorkNot Enough Data to KnowDoes Not Workfaq-verywell

Thermoplastic PU

WorksNot Enough Data to KnowDoes Not Workfaq-verywell

ABS *

Does Not WorkNot Enough Data to KnowDoes Not Workfaq-verywell

Polycarbonate/Nylon *

Does Not WorkDoes Not WorkDoes Not Workfaq-verywell

 

OtherHMEDMDDPCP

Latex (not PU)

faq-verywellfaq-verywellDoes Not Work

Paper

Not Enough Data to KnowNot Enough Data to KnowWorks
Phenolicfaq-thoreticallyfaq-thoreticallyfaq-verywell

* = Based on viscosity of typical injection moulding grades.

 

Table Icons Key:

faq-verywell = Works well with good supporting data.

faq-well = Known to work but some PD or customer work will be required.

faq-thoretically =  Theoretically should work but will need evaluating.

faq-unsure = No data to make a judgement.

faq-wontwork = Cannot work.

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How much Phyrolex should I use?

This is very much dependant on what fire test your looking to pass. Upon requesting a sample we would advise you on what we would recommend as a suitable loading. However  if we take polyester resins as an example. If you want to achieve a Euroclass B on the EN13823 SBi test (one the harder building tests) using an orthopthalic resin with a high styrene content of about 40% then you may need as much as 25% Phyrolex HMED (on resin weight) to achieve this result. However if your using a Low styrene DCPD resin then you should only need to use 10% Phyrolex HMED.

If we take epoxy as another example where there is a very high level of non combustible material in the form of glass or carbon you should require a loading of 15-20% of resin weight depending on the resin and fire test conditions.

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Why use Phyrolex?

The table below gives a good summary of the advantages of Phyrolex. On top of this it is halogen free and outside of REACH restrictions.

 Brominated
Typical
Melaminepoly phosphateAntinomy TrioxideAmmonium polyphosphateAluminium TrihydratePhyrolex
SG 3.251.75.21.92.421.2 - 1.4
Activation
Temperature
290325Not relevant280290190 - 225
Char formerNoDepends on resinNoDepends on resinNoYes
Typical loading15%30%1 - 5%30%40%15 - 25%
Smoke emissionHighModerateSee brominatedModerateLow *Low
Relative cost 211.510.251

 

Is it UV stable?

When incorporated into a resin system it is UV stable. All Phyrolex coatings are UV stable

Is it moisture sensitive?

The base powder is slightly moisture sensitive but if its stored correctly this doesn’t present a problem. When incorporated into a resin it is not moisture sensitive. All Phyrolex coatings are moisture stable for internal applications. For external applications we can provide suitable topcoats.