Exolit™ OP 552
Clariant’s Exolit™ OP 552 is a flame retardant specifically designed for flexible polyurethane foams. The product is a reactive flame retardant that can be chemically reacted into the PU matrix, preventing unwanted migration from the material. Therefore, very stringent emission standards for PU flexible foams can be achieved. This makes the product suitable for low VOC applications, for example in the automotive industry. Exolit™ OP 552 is a medium-viscosity liquid, based on a non-halogenated phosphorus polyol with a functionality of approx. 2.
Product Information
- Non-halogenated flame retardants with favorable environmental and health profile
- Reactive flame retardant for low-VOC applications, allows meeting demanding emission standards like Fogging or VDA 278
- Low migration from the polymer matrix due to chemical incorporation prevents fading of the flame-retardant performance
- High phosphorus content allows superior flame-retardant efficiency at low dosages
- Medium viscosity liquid for easy processing
For regulatory details such as the classification and labelling as dangerous substances or goods please refer to our corresponding Material Safety Data Sheet.
|
Characteristics |
Unit |
Target value |
DS¹) |
TD²) |
Test method |
|
Appearance |
|
Clear yellow to brownish liquid |
☑ |
☐ |
visual |
|
Phosphorus |
%(w/w) |
16 - 18 |
☑ |
☐ |
Photometry after oxidizing dissolution; (11/17) |
|
Density |
g/cm³ |
1.31 |
☐ |
☑ |
at 25 °C |
|
Viscosity |
mPa•s |
max. 3,500 |
☑ |
☐ |
Brookfield viscosimeter, 25 °C; (11/30) |
|
Color Number (Gardner) |
|
max. 10 |
☑ |
☐ |
Spectrophotometry; (11/22) |
|
Acid Number |
mg KOH/g |
max. 3 |
☑ |
☐ |
Titration using alkali; (11/11) |
|
Hydroxyl Number |
mg KOH/g |
max. 170 |
☑ |
☐ |
Double Karl-Fischer-titration; (11/14) |
|
¹) Delivery specification: The product is monitored on a regular basis to ensure that it adheres to the specified values. Test methods: Clariant method numbers 11/xx in brackets.
|
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- Exolit™ OP 552 is primarily suited for flame-retarded flexible PU foams, including both polyether- and polyester polyol-based materials.
- Typical application examples include production of automotive slabstock and molded foam. FMVSS 302 class SE foams can be achieved with dosages of 2-8 php, depending on the density.
- Exolit™ OP 552 can replace scrutinized volatile flame retardants including TCPP.
- Application in other PU material types like integral skin foam, coatings, adhesives, sealants and elastomers is also possible.
- The use of an anti-scorching agent is recommended when processing Exolit™ OP 552 in low-density foams, e.g. products like Irgastab™ PUR 70 from BASF SE.
- Exolit™ OP 552 is particularly suitable for self-formulating PU producers. Long-term storage in water-containing PU systems is not recommended.
- Guide formulations for standard applications are available on request.
Delivery form
Liquid
Packaging
Exolit™ OP 552 is supplied in following packaging units:
1 kg sample bottles
50 kg PE open head drums (9 drums per pallet)
1.000 kg net in non-returnable 1.000 liter semi bulk containers
Storage
In the presence of moisture or water Exolit™ OP 552 hydrolyses slowly and should therefore be stored and handled in such a way to exclude any potential sources of moisture.
Minimum shelf life is 12 months from the date of shipping when stored according to the said conditions.
