A coupling agent capable of eliminating gel point and preparation method thereof
A coupling agent and no gel point technology, which is applied in the field of coupling agent that can eliminate gel point and its preparation, can solve the problems of increased manpower and material resources, unqualified appearance, spark breakdown, etc., and reduce downtime for cleaning equipment The number of times, saving manpower, material and financial resources, and improving production efficiency
Active Publication Date: 2014-10-08
SHANGHAI KAIBO SPECIAL CABLE FACTORY
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Problems solved by technology
Since this gel point cannot be melted at high temperature, its surface will be affected when it is used in subsequent cable material products, especially for the production of small-sized cables with thin wall thickness. The gel point will not only cause unqualified appearance, but also cause surface damage Defects cause spark breakdown and affect use
[0008] The current commonly used method to reduce the gel point is mainly to stop production regularly and clean up the equipment, which not only wastes time and increases manpower and material resources, but also cannot completely eliminate the gel point, and can only reduce the probability of its occurrence
Method used
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Embodiment 1～ Embodiment 5
[0027] The coupling agent preparation method that can eliminate gel point, this method comprises the following steps:
[0028] (1) according to the component listed in the embodiment in table 1 and content batching;
[0029] (2) the antioxidant is mixed with the absolute ethanol solvent, so that the antioxidant is evenly dissolved in the absolute ethanol; the weight ratio of the antioxidant to the absolute ethanol is 3:1;
[0030] (3) Put the above raw materials into a high-speed mixer, mix at high speed (1500-3000rpm) for about 1-3 minutes, and add the antioxidant solution during the mixing process;
[0031] (4) Low-speed (500-1000rpm) discharge;
[0032] (5) Put the mixed raw materials into a twin-screw machine to extrude and granulate. The speed of the extruder is controlled at 180-600 rpm. When the resin is linear low-density polyethylene, the temperature is set at 150-180°C in the feeding section, 190-200°C in the mixing section, and 205-210°C in the extrusion material ...
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Abstract
The invention relates to a coupling agent without gel points and its preparation method. The gel point-free coupling agent comprises the following raw materials by weight: 80-90 parts of a resin; 3-10 parts of anhydride; 0.1-1 part of a crosslinking agent; 0.5-2 parts of an antioxidant; and 0.2-2 parts of a lubricant. The preparation method of the coupling agent disclosed in the invention consists of: mixing the antioxidant with a proper amount of an anhydrous ethanol solvent, then putting other raw materials into a high-speed mixer according to the proportion for mixing, and adding the ethanol solution of the antioxidant during mixing; and then conducting low-speed discharging, and finally putting the discharged material into a double-screw extruder to perform extrusion granulation. Compared with the prior art, the coupling agent prepared by the method provided in the invention has no gel point, can be used for cable materials with high surface requirements, and is especially suitable for small specification cables.
Description
technical field [0001] The invention relates to the technical field of polymer materials, in particular to a coupling agent capable of eliminating gel points and a preparation method thereof. Background technique [0002] Coupling agent, also known as compatibilizer and compatibilizer, is a novel plastic additive. [0003] The coupling agent is compatible through block or grafting to improve the blending of incompatible polymers between two or more polymers (usually, one is a polar polymer and the other is a non-polar polymer ) and the third component added, this third component is a compatibilizer. The role of the coupling agent is to increase the compatibility of the two polymers, increase the adhesion between the two polymers, form a stable structure, and make the dispersed phase and the continuous phase uniform, that is, compatibilization. The reason why the coupling agent can compatibilize two polymers with different properties is that it has groups in its molecule th...
Claims
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IPC IPC(8): C08L51/06C08K5/14C08F255/02
Inventor 汪晓明胡玲
Owner SHANGHAI KAIBO SPECIAL CABLE FACTORY