This page contains a Flash digital edition of a book.
additives | Coupling agents


Khasat, North America Market Development Manager at Arkema. Orevac resin can be used to improve interfacial adhesion of a wide range of natural fibres, including hemp, sisal, flax, bleached Kraft paper fibre, bamboo, and wood. In wood-plastic composite (WPC) applications coupling agents allow higher levels of wood fibre or wood flour to be used while maintaining mechanical properties and improving moisture resistance. Moisture protection is particularly important at the end of WPC deck boards, for example, says Luigi Puglia, North America Develop- ment Manager for Functional Polyolefins at Arkema. Arkema also recently extended its range of Lotader


Above: BYK’s Scona coupling agents have been developed to improve adhesion to carbon fibres during the compounding process


Arkema’s Orevac family of maleic anhydride (MHA)


grafted PE and PP resins are used as coupling agents in compounds filled with glass fibre or beads, mineral fillers, or natural fibres. The coupling agents enable the polymer to better coat or wet-out the filler component, which improves the compound properties. “Without the coupling agent, the compound can experience adhesive failure at the interface of the filler and polymer. With the coupling agent, the bond between the filler and polymer is stronger than the matrix as a whole,” says Nick


terpolymers, which act as adhesion promoters and compatibilisers, as well as an impact modifier and flexibiliser, depending on the application. The polymeri- sation process used by the company to make terpoly- mers is said to allow higher levels of MAH to be achieved than through grafting. Higher MAH levels are useful for making concentrates for dilution or for certain perfor- mance applications that may need higher MAH levels, says Puglia. The new Lotader terpolymers are based on glycidyl methacrylate (GMA) with butyl acrylate (BA) or


Safe, sustainable and efficient: Polymer additives based 100% on vegetable oils


The solution the polymer industry has been waiting for:


Polymer additives as efficient and reliable as any standard market product – but produced entirely from sustainably sourced vegetable oils.


Einar®


from Palsgaard is a range of functional additives that deliver outstanding antistatic, antifogging and dispersion performance to food packaging products and other polymer applications.


All Einar® products are based on vegetable oils and come with world wide food contact approvals – and with outstanding test results, too.


Find out more at polymers.palsgaard.com


PHOTO: BYK


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  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84  |  Page 85  |  Page 86  |  Page 87  |  Page 88  |  Page 89  |  Page 90  |  Page 91  |  Page 92  |  Page 93  |  Page 94  |  Page 95  |  Page 96  |  Page 97  |  Page 98