TECNOTHANE® MDE 540 E

Tecnothane® MDE540E has been specifically developed for hand casting. It has been designed for applications requiring high level of mechanical resistance with a good balance of dynamic properties. It fits well with many different applications, especially static ones. MDE540E has been developed for heavy-duty applications where abrasion resistance and excellent mechanical properties are crucial.

Hardness (ShA)	MDE540E	R500L	RT143TL	Catalyst (%) *	Molds T (°C)	Pot life (sec)	Demolding (min)
65	100.0	87.6	5.7	0.6–0.8	70–80	270–360	60–120
70	100.0	70.9	6.6	0.6–0.8	70–80	240–300	40–90
75	100.0	55.4	7.4	0.5–0.7	80–90	120–180	40–90
80	100.0	38.0	8.2	0.3–0.5	80–90	120–180	30–90
85	100.0	24.9	9.0	0.3–0.5	90–100	90–150	20–40
90	100.0	9.1	9.8	0.2–0.4	90–100	90–150	20–40
92	100.0	0.0	10.2	0.1–0.2	90–100	90–150	20–40

The amount of main components is given on parts by weight.
*Pot life and demolding time are referred to the system with the suggested amounts of catalyst, Tecnoket D10 can be used to adjust pot life and demolding time.

The purpose of the following table is only to provide indicative data about material properties. Typical properties are referred to samples prepared according to internal conditions and measured thirty days after post curing.

ISO 7619-1
Hardness (ShA)	65±2	70±2	75±2	80±2	85±2	90±2	92±2
Hardness (ShD)	/	/	/	30±2	33±2	40±2	43±2
ISO 2781
Density (g/cm³)	1.22
ISO 37 (Tensile)
Modulus 50% (N/mm²)	1	2	2	3	4	5	6
Modulus 100% (N/mm²)	2	3	3	5	6	7	8
Modulus 300% (N/mm²)	5	6	8	10	13	15	16
Tensile strength (N/mm²)	32	33	35	38	42	45	50
Elongation (%)	600	580	570	560	550	540	540
ISO 34-1 (Tear strength)
DIE B/a (kN/m), 90° without nick	39	43	48	57	68	83	90
DIE B/b (kN/m), 90° with nick	16	18	20	25	31	45	58
DIE C (kN/m), crescent with nick	36	38	42	50	63	74	82
ISO 4662
Rebound resilience (%)	55	55	52	45	38	36	34
ISO 815
Compression set at 70ºC / 23h (%)	17	17	18	20	27	27	30
ISO 4649
Abrasion resistance (mg)	55	50	48	47	47	51	52

Do not allow excessive cooling of molded parts between demolding and post-curing.

Hardness (ShA)	Temperature (°C)	Time (hours)
From 65 to 74	70	16
Higher than 75	90	16

Materials are available in following packaging: 25, 50 or 200 kg

• In order to allow complete melting, pre-heat materials at following conditions (melting times are referred to 200 kg drums,stored at 20°C)

Pre-heating temperature (°C)	75
Pre-heating time (hours)	24

• After pre-heating, make sure all materials are completely melted.
• Well mix melted material by drilling or rolling the drum
• Load materials to the machine immediately after mixing.
• Materials must be stored under nitrogen blanket after use.