search.noResults

search.searching

dataCollection.invalidEmail
note.createNoteMessage

search.noResults

search.searching

orderForm.title

orderForm.productCode
orderForm.description
orderForm.quantity
orderForm.itemPrice
orderForm.price
orderForm.totalPrice
orderForm.deliveryDetails.billingAddress
orderForm.deliveryDetails.deliveryAddress
orderForm.noItems
ADDITIVES | PROCESSING AIDS


“Multi-functionality of wax additives – one additive with several functions – is an asset,” he says. “In addition, plant-based chemically functionalised wax additives, available on a sustainable basis, are a growing requirement of the biopolymer market. There is also a need for special wax additive packages for recycled plastics: The multi- functionality of montan waxes in synergy with other additives, such as stabilisers and lubricants, can be used to produce compounds with property profiles that are very close to those of new products. These include the Voelkperplastic recycling series of wax additive blends and montan waxes – Cevo and Waradur. The products of the Voelpker plastic recycling series are also adapted to the processing conditions of specific recyclates.” Monitoring wax performance is also a key


consideration, according to Matthies. “Many of the products that have been advertised in the past as ‘drop in alternatives’ to proven montan wax esters


give sub-optimal results in practical applications because they do not provide the same properties and use characteristics,” he says. “Un-derivatised vegetable ester waxes, for example rice bran wax, and also polyester waxes from polymer degradation do not provide the equivalent processing and performance characteristics such as those of montan esters. Their chemical characteristics do not fully meet most current specifications for montan waxes and they also show differing performance in volatility [Figure 1] and colour stability [Figure 2].” Matthies adds that low priced standard commodity lubricants can often cause unwanted side effects such as ‘blooming out’, for example with EBS wax in TPU. He says that the solution in many cases is new montan wax derivatives that close the gap between oleo-based and montan- based structures and application properties, such as Waradur GSM and ESM. In addition, the company offers the Waradur OPplus, a saponified montan wax with a high calcium montanate content and further improved volatility. Its structure and chemical characteristics are shown in Figure 3.


Figure 1: Volatility of Waradur OPplus high calcium saponified montan wax compared to some typical alternatives determined by Thermogravimetric analysis (Fraunhofer-Institut WKI, Braunschweig; Mettler, 10.00 K/min) Source: Voelkper


Figure 2: Colour stability under stress of Waradur E hard ester montan wax compared to some current alternatives (Heraeus UT 6120 laboratory air circulation oven; 250°C/ 30 min)


Recycling challenges The company says that its Voelpker plastic and plastic recycling series of wax additive blends and montan waxes are designed to overcome processing challenges and allow compounders to develop formulations offering optimised characteristic value profiles. “One goal is to complement the specific ‘DNA’ of the montan esters to the properties of oleo-based esters,” says Matthies. “Waradur GSM and Waradur ESM are hybrid ester waxes consisting of a mixture of long chain (mainly C28-32) wax acids and fatty acids esterified with multihydroxyl alcohols. They


Source: Voelpker 62 COMPOUNDING WORLD | April 2019 www.compoundingworld.com


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  |  Page 99  |  Page 100  |  Page 101  |  Page 102