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Silane crosslinking mixture capable of realizing fast self-crosslinking at normal temperature
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A silane cross-linking and mixture technology, which is applied in the field of silane cross-linking mixtures, can solve the problems of low production efficiency, achieve the effects of maintaining electrical properties, reducing cross-linking conditions, and improving thermal stability
Inactive Publication Date: 2017-05-10
JIANGSU HENGFENG CABLE
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Abstract
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Problems solved by technology
However, its cross-linking method must be cooked in hot water or steam, so the production efficiency is extremely low
Method used
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Embodiment 1
[0024] A silane crosslinking mixture capable of rapid self-crosslinking at normal temperature, made of the following components by weight:
[0025]
[0026] Preparation method, the steps are as follows:
[0027] Put LLDPE, initiator DCP, silane coupling agent A-151, antioxidant 1010, and lubricant EBS into a vacuum drum dryer, vacuumize, and rotate and stir at 50-60°C for 2 hours at a speed of 60 rpm; Add 100% water-absorbing modified polyvinyl alcohol and catalyst silica gel, maintain the temperature at 50-60° C., rotate at 60 rpm, and continue stirring for 1 hour to obtain the silane crosslinking mixture.
[0028] After the prepared silane crosslinking mixture is extruded into cables, the crosslinking rate reaches 68% after 5 hours under the condition of normal temperature and humidity.
Embodiment 2
[0030] A silane crosslinking mixture capable of rapid self-crosslinking at normal temperature, made of the following components by weight:
[0031]
[0032] Preparation method, the steps are as follows:
[0033] Put LLDPE, initiator DCP, silane coupling agent A-151, antioxidant 1010, and lubricant EBS into a vacuum drum dryer, vacuumize, and rotate and stir at 50-60°C for 2 hours at a speed of 60 rpm; Add 100% water-absorbing modified polyvinyl alcohol and catalyst silica gel, maintain the temperature at 50-60° C., rotate at 60 rpm, and continue stirring for 1 hour to obtain the silane crosslinking mixture.
[0034] After the prepared silane crosslinking mixture is extruded into cables, the crosslinking rate reaches 66% after 5 hours under the condition of normal temperature and humidity.
Embodiment 3
[0036] A silane crosslinking mixture capable of rapid self-crosslinking at normal temperature, made of the following components by weight:
[0037]
[0038] Preparation method, the steps are as follows:
[0039] Put LLDPE, initiator DCP, silane coupling agent A-151, antioxidant 1010, and lubricant EBS into a vacuum drum dryer, vacuumize, and rotate and stir at 50-60°C for 2 hours at a speed of 60 rpm; Add 100% water-absorbing modified polyvinyl alcohol and catalyst silica gel, maintain the temperature at 50-60° C., rotate at 60 rpm, and continue stirring for 1 hour to obtain the silane crosslinking mixture.
[0040] After the prepared silane crosslinking mixture is extruded into cables, the crosslinking rate reaches 68% after 5 hours under the condition of normal temperature and humidity.
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Abstract
The invention discloses a silane crosslinking mixture capable of realizing fast self-crosslinking at normal temperature. The silane crosslinking mixture is prepared from the following ingredients in parts by weight: 90 to 110 parts of LLDPE (Linear low density polyethylene), 0.1 to 0.5 part of initiators, 0.8 to 1.5 parts of silanecoupling agents, 0.2 to 0.5 part of antioxidants, 0.1 to 0.5 part of lubricating agents, 0.6 to 2.5 parts of water producing agents and 0.1 to 0.4 part of catalysts. The invention also discloses a preparation method of the silane crosslinking mixture. The method comprises the following steps that the LLDPE, the initiators, the silane coupling agents, the antioxidants and the lubricating agents are fed into a vacuum drum dryer; vacuum pumping is performed; rotary stirring is performed for 2h at 50 to 60 DEG C; then, after 100-percent water absorption modified polyvinyl alcohol and the catalyst are added, stirring is continuously performed for 1h; the silane crosslinking mixture is obtained. After the silane crosslinking mixture becomes a cable through extrusion molding, the crosslinking rate reaches 65 percent or higher after 5h under the conditions of normal temperature and normal humidity.
Description
technical field [0001] The invention relates to a silane crosslinking mixture, in particular to a silane crosslinking mixture capable of rapid self-crosslinking at normal temperature. Background technique [0002] Silane cross-linked polyethylene has good electrical properties, physical and mechanical properties, and good aging properties, so it is widely used in the wire and cable industry. However, its cross-linking method must be cooked in hot water or steam, so the production efficiency is extremely low. Contents of the invention [0003] The purpose of the present invention is to provide a silane crosslinking mixture that can self-crosslink quickly at normal temperature, and add super water-absorbing materials and catalysts to the silane crosslinking polyethylene material, and use this product to produce cables under normal temperature and humidity conditions. Fast cross-linking. [0004] The object of the present invention is achieved through the following technica...
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