impact modifiers | additives feature preparing for impact
plastics often need a helping hand to withstand the knocks they’ll take in their working life. Think of a mobile phone accidently dropped onto unforgiving concrete, or a car bumper backed into an immovable bollard in a car park. whatever the cause of impact, there are modifiers that will help to improve a polymer part’s chances of survival. The choice of impact modifiers has grown in recent
years with the introduction of new technologies such as metallocene-based specialty elastomers that bridge the gap between elastomers and plastics. These provide an interesting alternative to traditional Epr and Epdm elastomers for many applications. There have also been new emerging applications for impact modifiers, for example in bioplastics that frequently require a boost to their strength. Additives suppliers and compounders agree that
there is room for all types of impact modifiers, particu- larly the more recent higher efficiency products. These can provide higher impact strength at lower addition levels, and/or deliver improved flowability resulting in better processing rates. The automotive industry continues to be a leading
market for impact modifiers. The additives are used in a wide range of applications from interior trim compo- nents to exterior parts such as Tpo bumpers. other key markets include impact-resistant consumer products
www.compoundingworld.com
it’s a tough world out there. Lilli
Shermanreviews the latest impact modifiers designed to help plastics withstand the bashing they will encounter in their everyday lives
and crack-resistant rigid packaging, plus numerous industrial applications. Key drivers include lightweight- ing, recyclability and cost reduction. over the following pages we look at a range of new developments designed to meet these market requirements.
Tough choices Arkema recently launched durastrength 410, a high- efficiency acrylic-based impact modifier for pc/ABS and other pc formulations. it increases the compound’s toughness while also improving its flowability. it can also lift the low-temperature impact strength of pc/ABS. According to Arkema, the efficiency of the new
product means that lower loadings are required to give the same impact and flow behaviour when compared to other acrylic impact modifiers. it can be used in injection moulding or extrusion compounds and can
January 2012 | compounding world 31
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
