Flexible one-step silane naturally-crosslinked EPDM cable material and preparation method thereof
A technology of natural cross-linking and method silane, which is applied in the field of wire and cable insulation and sheath materials, soft one-step silane natural cross-linking EPDM cable material and its preparation, which can solve the problem of product instability, high energy consumption and short storage period To achieve reliable extrusion performance and cross-linking degree, simplify the process flow, and stabilize product performance
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Embodiment 1
[0045] Example 1: Soft one-step silane natural crosslinking EPDM cable material and its preparation method
[0046] One, the preparation of EPDM compound:
[0047] Weigh 70 parts of EPDM (Exxon 2605B) and 30 parts of ethylene-ethyl acrylate copolymer (DuPont 2116), and mix them evenly to obtain the EPDM compound.
[0048] 2. Preparation of catalyst masterbatch:
[0049]Weigh 100 parts of low-density polyethylene (Shanghai Petrochemical Q281), 15 parts of catalyst (di-n-butyltin maleate), 15 parts of antioxidant (antioxidant 1010), metal deactivator (N,N'-bis[ β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine) 10 parts, lubricant (stearic acid) 10 parts, after mixing in a closed high-speed mixer for 20 minutes, in ordinary Extrude and granulate on a twin-screw extruder, dry at 60°C for two hours, and set aside.
[0050] Three, the preparation of cross-linking composite agent:
[0051] Weigh 2 parts of vinyltrimethoxysilane as a coupling agent and 1 part of dicumyl pe...
Embodiment 2 4
[0057] Embodiments 2-4: A kind of flexible one-step silane natural crosslinking EPDM cable material and its preparation method
[0058] 1. The formula of EPDM compound is as follows:
[0059] EPDM EEA Embodiment two 50 copies 50 copies Embodiment Three 60 copies 40 copies Embodiment Four 80 copies 20 copies
[0060] 2. The formula of the catalyst masterbatch is as follows:
[0061] LDPE catalyst antioxidant metal deactivator lubricant Embodiment two 100 copies 4 parts 15 copies 3 copies 13 copies Embodiment Three 100 copies 20 copies 20 copies 5 copies 20 copies Embodiment Four 100 copies 10 copies 5 copies 8 servings 30 copies
[0062] Note: 1. Example 2: Catalyst: 2 parts of di-n-butyltin dilaurate, 2 parts of di-n-octyltin dilaurate; antioxidant: 15 parts of dilauryl thiodipropionate; metal deactivator N, N 3 parts of '-bis[β-(3,5-di-tert-butyl-4-hydroxypheny...
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