Advanced Materials. Raising performance with benzoxazine resins

Transcription

1 Raising performance with benzoxazine resins Quarter 1, 2015

2 Table of contents Features and benefits Features and benefits Reaction mechanism Product selection Araldite benzoxazine resins structure Product selection Processing parameters Viscosity Reactivity Thermo-mechanical / FST performance Thermo-mechanical properties Flammability behavior Accelerators Accelerators DT 300, DT 310 Accelerator DT 310, Aradur

3 Features and benefits < Table of content Features / Benefits > Product selection > Processing > Performance > Accelerators > Aspect!! Yellowish solid to semi-solid Main features!!!!!!!!!! Di-functional thermosetting molecule Reacts at high temperature through addition reaction, without gas release and with near-zero shrinkage Creates on curing a phenolic-type network, showing very low moisture absorption High glass transition temperature and high modulus network Compatible with various other chemistries including epoxies, bis-maleimides, phenolics! Applications and benefits!!!! Provides matrices with higher modulus than epoxy resins, with equivalent glass transition temperature, lower water sensitivity, and better flame resistance Proposed for advanced composites, structural adhesives, laminates for printed wiring boards, high performance coatings, encapsulating and molding compounds 3

4 Reaction mechanism Synthesis R 3 H R 3 R 2 H H H 2 R 2 R 1 R 1 Curing of benzoxazine resins H H H H R 1 R 2 R 3! R 1 R 2 R 3 R 1 R 2 R 3 R 1 R 2 R 3 R 1 R 2 R 3 R 1 R 3 R 1 R 3 R 1 R 3 R 1 R 3 R 1 R 3 + (or phenolic, bis-maleimides!) R H H n H R H R n 4

5 Araldite benzoxazine resins structure CH 3 CH 3 C H 2 Bis-A based Bis-F based!! Araldite MT 35600!! Araldite MT 35700!! Araldite LZ Solvent based Proprietary Phenolphthaleine based!! Araldite MT FST ew!! XU (UL 94 V-0) Solvent based!! Araldite LZ / Aradur HZ 8279 Z 50 Solvent based

6 Product selection Benzoxazine resins Product Description Viscosity Tg Features Unit mpa.s C Araldite MT Bis-A based at 100ºC Solid, low reactivity Araldite MT Bis-F based at 100ºC Solid, good FST properties Araldite LZ Bis-F based at 25ºC Solvented, good FST properties Araldite MT FST Proprietary at 100ºC Semi-solid, outstanding FST and heat release properties XU Araldite LZ / Aradur HZ 8279 Z 50 Phenolphthalein based Phenolphthalein based at 25ºC Solvented, outstanding FST and heat release properties, High Tg at 25ºC Solvented, outstanding FST and heat release properties, High Tg

7 Product selection Benzoxazine accelerators / hardeners Product Description Melting / Softening point Appearance Unit mpa.s C Accelerator DT 300 Thiodiphenol White powder Accelerator DT 310 Thiodiacid White powder Aradur ovolac hardener Light to dark yellow flakes Aradur 3123 Imidazole White to amber powder

8 Viscosity Comparison of Araldite MT 35600, MT and MT FST Viscosity at different temperature Viscosity measured with cone / plate 8

9 Reactivity Comparison of Araldite MT 35600, MT and MT FST Gel time at 180ºC Gel time measured with hot plate 9

10 Thermo-mechanical properties Comparison of Araldite MT 35600, MT and MT FST Modulus and glass transition Cure profile: 2h at 120ºC + 2h at 180ºC + 2h at 200ºC 10

11 Flammability behavior Araldite MT FST and XU vs. Phenolic Araldite MT FST XU Catalyst (1) XU (1) Phenolic prepreg Aero qualified reference (1) E-glass (2) 2-ply laminate E-glass (2) 1-ply laminate E-glass (2) 1-ply laminate E-glass (2) 1-ply laminate Prepreg resin content 50% 50% 50% 40% Curing conditions 2 h at 150ºC + 2 h at 177ºC, 1.0 bar 2 h at 150ºC, 1.0 bar 2 h at 180ºC, 1.0 bar - Resin content (cured) % ± 2 Flammability 12 s AITM B mm / 2 s / 0 s 128 mm / 0 s / 0 s - Flammability 60 s AITM A 94 mm / 0 s / 0 s 167 mm / 0 s / 0 s 144 mm / 0 s / 0 s 60 mm / 0 s / 0 s Smoke density (flaming) AITM Ds 6 Ds 6 Ds 5 Ds Toxicity (flaming) AITM HC 2 ppm 1 ppm 2 ppm 0 ppm C 19 ppm 74 ppm 113 ppm 50 ppm x 3 ppm 3 ppm 5 ppm 10 ppm S 2 0 ppm 6 ppm 1 ppm 0 ppm HCI 0 ppm 0 ppm 0 ppm 0 ppm HF 1 ppm 0 ppm 0 ppm 0 ppm Heat release test (HRR / HR) AITM kw/m 2 / 18 kw*min/m 2 63 kw/m 2 / 33 kw*min/m 2 58 kw/m 2 / 34 kw*min/m 2 65 kw/m 2 / 40 kw*min/m 2 (1) Tested by Airbus Bremen (2) 5h Satin, 6K, 270 gsm 11

12 Accelerators DT 300, DT 310 Effect of accelerators DT 300 and DT 310 on Araldite MT Gel time 12

13 Accelerator DT 310, Aradur 3123 Effect of accelerators DT 300 and Aradur 3123 on Araldite MT FST / Aradur Gel time and glass transition 80 parts Araldite MT FST + 20 parts novolac hardener (Aradur based) / 3.5 parts accelerator Gel time measured with hot plate 13

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