ADVERTISEMENT FEATURE
VISCOSPEED
Table 2. Natural MDH, EVA-based sheathing compound Ingredient
(2)
EVA VAc=28% MFI=3 C8
-POE d=0.868 MFI=0.5 LLDPE-g-MAH VISCOSPEED
Uncoated milled MDH 3.5µm Silicone masterbatch Hydrophobicity MB Stabiliser TOTAL
PROPERTIES
MFI – 21,6kg @ 190°C Tensile strength [N/mm2 Elongation at break [%]
2 ]
of bedding compounds even with filler loadings up to, and in some cases extending beyond, 80%. The resulting optimal filler dispersion
achieved using VISCOSPEED is also the reason for the enhanced mechanical properties evident in drummable bedding compounds (Table 4). This data shows that exchanging EVA28 MFI=3 in compound 4A with 2% or 4% of VISCOSPEED (compounds 4B and 4C) results in a big increase in MFI as well as almost doubling elongation at break values. The findings indicate that filler content can be further increased without sacrificing mechanical properties, so allowing further optimisation of flame retardance performance.
SUMMARY The new VISCOSPEED processing aid for halogen free flame-retardant compounds from Innospec has shown in all the compounds tested that it can optimise filler dispersion and so ease processing. It has also been demonstrated that VISCOSPEED achieves these positive results with no adverse effect on aging, flame retardancy or mechanical properties. In fact, in the case of POE-based formulations, elongation at break and flame retardancy can be improved. Low dosages of VISCOSPEED will help
>13 >150
ATH-free 15 15
4,5 2
62
1,5 0,5 0,5
100
Table 3. POE-based ATH-free sheathing compound Typical Compostion
(3A) Standard coated MDH
C8
-POE d=0.868 MFI= 0.5 PP Plastomer MFI=8 POE-g-MAH VISCOSPEED
Stearic coated milled MDH 3.5µm Aluprem TB 1/t
Silicone masterbatch Stabiliser TOTAL
PROPERTIES
MFI – 21,6kg@190°C Tensile strength [N/mm2 Elongation at break [%] Presence of burning drops
]
Table 4. Drummable bedding compounds Typical Composition
C4
-POE d=0.868 MFI<0.3 EVA VAc=28% MFI=3
Stearic coated milled MDH 5,5 µm VISCOSPEED TOTAL
PROPERTIES
MFI 160°
C@21.6kg LOI
Tensile Strength at break, MPa Elongation at break [%]
to maintain stable production in high productivity compounding equipment by accelerating the incorporation of fillers into the polymeric matrices. The incorporation of VISCOSPEED improves and accelerates the dispersion of flame retardant mineral fillers (milled ATH, milled MDH, kaolin, silicates, etc.) and additives (nanoclays, nanosilica, sepiolite, etc) into polymeric matrices with associated benefits in terms of rheology and flame retardancy. To learn more about VISCOSPEED
1
36 5
<50 3
36 6
>60 7
36 7
>100
and review test results obtained in cable compounds, Aluminium Composite Panels (ACP) and TPO-roofing membranes, contact Dr. Christoph Bornschein at Innospec Leuna.
Innospec Leuna GmbH Am Haupttor, Bau 6310 06237 Leuna, Germany
www.innospecinc.com
Tel: +49 (0) 3461 43 44 38
christoph.bornschein@
innospecinc.com
(4A)
Standard 15 15 70 -
100 2 12
215 yes
(4B) 2%
VISCOSPEED 15 13 70 2
100 4 10
>250 no
(4C) 4%
VISCOSPEED 15 11 70 4
100
19,5 9 5 -
60 5 1
0,5 100
(3B) VISCOSPEED coated MDH
19,5 9 3 2
60 5 1
0,5 100
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