New options with Baypren K. Varnhorn T. Neuner; R. Josten; N. Sary, H. Stange

Transcription

1 New options with Baypren K. Varnhorn T. Neuner;. Josten; N. Sary, H. Stange Sveriges Gummitekniska Förenings vårkonferens

2 Introduction: Lanxess offers a broad range of Polychloroprene rubbers. Baypren is a commonly used elastomer due to it s multi-purpose properties. A new finishing line offers new options and keep the establish properties of Baypren. 2 Baypren Kay Varnhorn Malmö,

3 Agenda Introduction, Polychloroprene New products by new technology New finishing new possibilities New products in compound studies Summary 3 Baypren Kay Varnhorn Malmö,

4 What is Polychlorprene - Baypren? a) linear, uniform configuration variations in MW and MW-distribution c) linear, reactive endgroups Cl Cl Cl Cl X n XD types X V e Cl Cl Cl Cl n determines Mooney viscosity b) linear, non-uniform configuration Cl Cl Cl d) precrosslinked determines gel content Cl n Cl Cl comonomer e) sulphur modified S S Low crystallization tendency S types 4 Baypren Kay Varnhorn Malmö,

5 Conventional Lanxess C products Mooney viscosity * M L 1+4/100 C General purpose grades non precrosslinked Precrosslinked types Sulphur modified grades Adhesive grades Latex grades Baypren Kay Varnhorn Malmö,

6 The first new grades: Three groups of new Baypren s Nomenclature Baypren 110 A VP 110 crystallization, slow Baypren 100 A VP Baypren 200 A VP Baypren 110 A VP Baypren 210 A VP Baypren 126 A VP Baypren 216 A VP 210 cryst. medium 110 Mooney range Low Mooney grades, better extrusion performance Improved vulcanization characteristics with MTT educed marching modus 100 low Mooney 110 mercaptane 116 xanthogene disulfid Special Performance Alternative Performance Improved Performance A VP new, trial product 6 Baypren Kay Varnhorn Malmö,

7 Standard and new process Standard process Coagulation Neutralization Washing Drying oping Chopping Freeze roll New (alternative) process Coagulation Dewatering Drying Chopping in that connection, freeze roll isolation of very low Mooney viscosity polymers or fluid polymers is difficult or virtually impossible. [Kirk-Othmer Encyclopedia of Chemical Technology] Standard New Lowest Mooney esources consumption Ammonia - Steam Water Natural gas - Electricity 7 Baypren Kay Varnhorn Malmö,

8 Focus of the presentation Baypren Mercaptane Xantogene Disulfide Low Mooney ETU MTT Standard Mooney Standard Mooney ETU MTT ETU MTT Fast cure regular cure 8 Baypren Kay Varnhorn Malmö,

9 Low Mooney grade B200A VP - Extrusion Mooney-Viscosity [MU] Baypren 210 Standard Baypren 200A VP EGAL SF / N EDENO C ,5 0,5 0,5 Scorchguard O 5,3 5,3 5,3 ZINKWEISS OTSIEGEL Edenol MTT based Crosslinking x x x Mooney viscosity compound B210 B210-B200 50/50 B200A VP Time [s] 9 Baypren Kay Varnhorn Malmö,

10 B210 - B200A VP Extrusion Die swelling Lower die swell for low Mooney B200 compared to B210 Significant reduced die swell for blend of B210: B200 (50:50) Less nerve Advantages in calandering 10 Baypren Kay Varnhorn Malmö,

11 B210 - B200A VP Extrusion Volume output Higher Volume output for low Mooney B200 compared to B210 Significant increased output for blend of B210: B200 (50:50) Higher output, higher production rate Advantage also for semifinished products 11 Baypren Kay Varnhorn Malmö,

12 B210 - B200A VP Extrusion Energy consumption Lower Energy consumption for low Mooney B200 compared to B210 Significant reduced Energy consumption for blend of B210: B200 (50:50) Safe energy cost Less compound temperature 12 Baypren Kay Varnhorn Malmö,

13 B210 - B200A VP Mechanical properties Stress strain curve for standard and low Mooney material comparable No lack of mechanical properties if low Mooney material is used 13 Baypren Kay Varnhorn Malmö,

14 B210 - B200A VP Compression set - hardness Compression set (%) Hardness (ShA) CS 70h / 22 C CS 70h / 70 C Hardness (ShA) Compression set at evaluated temperatures for a blend of low Mooney/ standard material is comparable to standard Low Mooney material slightly increase compression set No influence on hardness with low Mooney material and blend of thereof 0 B210 Standard B200A VP B Baypren Kay Varnhorn Malmö,

15 B110 B100A VP Injection moulding Injection moulding formulation MTT based curing system Blends of Baypren 110 Standard (40 MU) and Baypren 100A VP low Mooney (34 MU) BAYPEN BAYPEN 100A VP SCOCHGUAD O 5,3 5,3 5,3 ZINKWEISS OTSIEGEL EDENO C COAX N EGAL SF / N EDENOL TUDALEN 1849-TE HENOFIT DDA-70 1,5 1,5 1,5 HENOGAN MBTS-80 1,25 1,25 1,25 HENOGAN MTT Injection moulding formulation possible Investigate the influence of low Mooney C on flow behaviour and filling degree of injection moulding cavity 15 Baypren Kay Varnhorn Malmö,

16 B110 B100A VP Compound Mooney Filling degree Compound Mooney decrease with the addition of 30 and 50 parts low Mooney C Degree of filling increase with the addition of 30 and 50 parts low Mooney C Better filling of IM cavity 16 Baypren Kay Varnhorn Malmö,

17 Summary I: Low Mooney grades Summary low Mooney grades Baypren A VP low Mooney grades offer low Mooney viscosity about 28 MU Baypren A VP low Mooney grades have comparable mechanical properties to standard grades despite lower Mooney viscosity Baypren A VP low Mooney grades offer better flowing lower die swell higher out put lower energy consumption Baypren A VP low Mooney grades offer new compounding option combinations of high and low Mooney polymers e.g. B230 / B200 Baypren A VP low Mooney grades can support to optimize processing 17 Baypren Kay Varnhorn Malmö,

18 Curatives ETU and MTT Most vulcanization systems for C contain either ETU or MTT as curative. US Environmental Protection Agency (EPA) has classified ethylene thiourea as a group B2, probable human carcinogen. Therefore ETU is restricted in many countries. Customers looking for alternatives like MTT. ETU Ethylene thiourea (Imidazolidin-2-thion) Trade names (heinchemie) henogran ETU 80 henocure NPV/C former Vulkacit NPV/V MTT N-Methyl-thiazolidin-2-thion Trade names (heinchemie) henogran MTT 80, henocure CV/LG former Vulkacit CV 18 Baypren Kay Varnhorn Malmö,

19 B110 - MTT curing - MD Variation in temperature and MTT level Temperature and level of curative influence the cure rate (and the maximum torque) Baypren EGAL SF / N EDENO C ,5 0,5 0,5 Scorchguard O 5,3 5,3 5,3 ZINKWEISS OTSIEGEL HENOGAN MTT 0,5 0,5 1 henofit DDA 70 1,5 1,5 1,5 19 Baypren Kay Varnhorn Malmö,

20 B110 B110A VP MTT curing MD Part I S' [dnm] B110 MTT 0,5 180 C B110 MTT 0,5 160 C B110 MTT 1,0 160 C B110 (ef.) MTT 0,5 160 C B110 (fast) MTT 0,5 160 C B110 (regular) MTT 0,5 160 C Polymer B110 B110 B110 B110 B110A VP fast B110A VP regular HENOGAN MTT-80 0,5 0,5 1 0,5 0,5 0,5 henofit DDA 1,5 1,5 1, New, fast 180 C 1 phr Time [s] New, regular B110 MTT 0,5 180 C B110 MTT 0,5 160 C B110 MTT 1,0 160 C B110 (ref.) MTT 0,5 160 C B110A VP (fast) MTT 0,5 160 C B110A VP (regular) MTT 0,5 160 C Temperature and level of curative influence the cure rate (and the maximum torque) Cure rate of new B110A VP (fast) only be achieved with the new material not with variation of temperature or curative level 20 Baypren Kay Varnhorn Malmö,

21 B110 B110A VP MTT curing MD - Part II 160 C Baypren Baypren 110A VP (fast) 100 Baypren 110A VP (regular) 100 Scorchguard O 5,3 5,3 5,3 ZINKWEISS OTSIEGEL EDENO C EGAL SF / N HENOGAN MTT MBTS 80% 1,25 1,25 1,25 henofit DDA 1,5 1,5 1,5 21 Baypren Kay Varnhorn Malmö,

22 Summary II: Improved MTT curing Summary Improved MTT curing Baypren A VP grades have improved cure rates for MTT Curing curve is close to an ideal curing curve Polymer variations are possible to further adapt the vulcanization rate of MTT curing 22 Baypren Kay Varnhorn Malmö,

23 XD grades from alternative finishing a) linear, uniform configuration variations in MW and MW-distribution c) linear, reactive endgroups Cl Cl Cl Cl X X n XD types V e Cl Cl Cl Cl n determines Mooney viscosity b) linear, non-uniform configuration Cl Cl Cl d) precrosslinked determines gel content Cl n Cl Cl comonomer e) sulphur modified S S Low crystallization tendency S types 23 Baypren Kay Varnhorn Malmö,

24 B216 B216A VP Comparison Baypren Baypren 216A VP 100 EGAL SF / N EDENO C ,5 0,5 Scorchguard O 5,3 5,3 ZINKWEISS OTSIEGEL 5 5 HENOGAN ETU-80 0,5 0,5 24 Baypren Kay Varnhorn Malmö,

25 B216 B216A VP Scorch (120 C) MD 160 C 25 Baypren Kay Varnhorn Malmö,

26 B216 B216A VP Mechanical properties Mooney scorch, comparable to standard MD, lower final torque maximum with ETU, slightly improved marching modulus Stress strain curve comparable 26 Baypren Kay Varnhorn Malmö,

27 B216 B216A VP Compression set - Hardness Compression set and hardness are on a similar level for the evaluated formulation 27 Baypren Kay Varnhorn Malmö,

28 Summary III: XD grades General summary Summary XD grades XD grades obtained by new finishing offer a very similar material performance in terms of vulcanization and mechanical properties Summary Improved MTT curing Baypren A VP grades have improved cure rates for MTT Polymer variations are possible to further adapt the vulcanization rate of MTT curing Summary low Mooney grades Baypren A VP low Mooney grades have comparable mechanical properties to standard grades despite lower Mooney viscosity Baypren A VP low Mooney grades can support to optimize processing 28 Baypren Kay Varnhorn Malmö,

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