additives feature | impact modifiers Arkema has also developed two new impact modi-
Arkema’s Lotader 2200 provides impact resistance at low tempera- tures for parts such as rear- view mirrors
also enhance formulations containing reclaimed material. commercial development manager connie lo explains that “durastrength 410 enables customers to use more recycled products in their formulations without sacrificing mechanical performance.” The company’s durastrength 440 is still considered to
be its highest-performing impact modifier for pc and pc/pBT, but durastrength 410 has been shown to be a better performer for pc/ABS, especially at low tempera- tures. At a low loading level of 1%, the 410 grade has been shown to be slightly less effective than 440 or Arkema’s clearStrength E920 mBS modifier in toughen- ing pc/ABS at room temperature. However, at -20o
c,
durastrength 410 matches or exceeds 440 and E920 at all loadings, and significantly outperforms both at -40o Target applications for durastrength 410 include
c.
automotive components, appliances, business equip- ment, electrical and electronic products, plus safety and leisure equipment, according to lo. Both durastrength 440 and 410 are currently offered as powders, but the company has pellet forms in development.
stiffness l A Leading modifier
n EngAgE XLT (same elastomer loading)
processing melt flow
charpy
Low Temperature impact
heat Distortion Temperature
heat Distortion Temperature
Dow’s EngAgE XLT cAn proDucE Tpos wiTh improvED Low TEmpErATurE impAcT rEsisTAncE whEn usED AT ThE sAmE LoADing As oThEr moDifiErs (LEfT) or iT cAn bE usED AT A LowEr LoADing To givE improvED Tpo sTiffnEss AnD fLow combinED wiTh AccEpTAbLE impAcT propErTiEs (righT)
32 compounding world | January 2012
www.compoundingworld.com
processing melt flow
fiers – orevac im300 and lotader 2200 – which offer improved flowability for polyamide 6 and 66 used in automotive, industrial and household applications. Sales and business development manager Fabrice chopinez says that both additives minimise viscosity increases compared to other impact modifiers. This makes them ideal for the injection moulding of very thin-walled or complex parts and for improved productivity rates. orevac im300 is a grafted polyolefin grade which is particularly good for increasing the impact resistance of pA 6 components. it is said to offer an excellent compromise between flexibility and resistance to impact and cracking at sub-zero temperatures. lotader 2200 is an acrylate-based ethylene terpoly- mer that is especially suited to pA 66 components that require excellent impact resistance at very low tem- peratures. Examples include rear-view mirrors, hubcaps, handles and lawnmower bodies.
Elastomers stretch out dow Elastomers has a new addition to its line of Engage polyolefin elastomers (poEs) for Tpos used for automotive interior and exterior components. when compounded with pp, Engage XlT is said to deliver a combination of advantages not previously available with other Tpo impact modifiers. The new grade supple- ments the company’s Engage Hm series and its broad range of ethylene octene and ethylene butene copoly- mers which have been experiencing growing demand. The company has added significant production capabil- ity at its Specialty Elastomers site in Thailand, in addition to its plants in the uS and Europe, extending its global production capacity beyond 800,000 tonnes. According to the company, Engage XlT provides a variety of benefits for compounders, moulders, vehicle
stiffness l A Leading modifier
n EngAgE XLT (reduced elastomer loading)
charpy
Low Temperature impact
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68
