A kind of manufacture method of flame retardant rubber
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A technology of flame retardant rubber and a manufacturing method, applied in the field of rubber manufacturing, can solve the problems of poor cold resistance, poor ductility, and low service life, and achieve the effects of improving modification effect, broad application prospect and prolonging service life.
Active Publication Date: 2015-11-11
江苏湘园化工有限公司
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Problems solved by technology
The disadvantages of chloroprene rubber are electrical insulation performance, poor cold resistance, raw rubber is unstable during storage, and when used to manufacture flame-retardant rubber for centrifugal pumps or diaphragm pumps in slurry transportation, the service life is low and the ductility is low. No, this invention has changed these disadvantages
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Embodiment 1
[0022] A kind of manufacture method of flame retardant rubber, its processing step is as follows:
[0023] (1) Mastication: Take 80g of neoprene raw powder and 20g of nitrile rubber raw powder for plastication to improve its plasticity, and the addition of acetonitrile rubber increases the ductility;
[0024] (2) Mixing: Add 30g of carbon black, 10g of short fiber, 1g of stearic acid, 10-15g of nano-flame retardant compound, 1.5g of anti-aging agent to the plasticized butadiene rubber raw powder and nitrile rubber raw powder and accelerator DM43.5~4.5g in the kneading machine, the mixing and kneading conditions are 8MPa, 150~190°C, 20min; the preparation method of the nano-flame retardant compound is:
[0025] (a) The silicon hydroxyapatite, red phosphorus, attapulgite, hydrotalcite, montmorillonite, titanium dioxide, calcite, kaolin according to 25-35: 15-20: 10-15: 10-15: 8-10: 8-10: 7-8: 5-7 parts by mass, mixed, added to a mixed solution of 200 parts of dimethyl sulfoxide...
Embodiment 2
[0037] Example 2: The rest is the same as in Example 1, except that in step (2), the mixing condition is 8MPa, 100°C, 1h, but at such a temperature, prolonged time cannot enhance mixing As a result, the obtained mixed rubber is easy to crack.
Embodiment 3
[0038] Embodiment 3: the rest is the same as the above-mentioned embodiment 1, the difference is that in step (5), the thickness of the isocyanate glue is thinner, which is the same as the thickness of pregelatinization, and the polyurethane film is easy to fall off.
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Abstract
The invention discloses a production method of a flame retardant rubber and relates to the rubber production field. The flame retardant rubber is produced through plastifying, mixing, molding, treating, gumming, gluing and drying; in the production of the flame retardant rubber, plastifying is carried out at first to improve the plasticity of rubber; as a result, the rubber can be well mixed with other substances in the consequent steps; acetonitrile rubber is added to improve the ductility of the rubber; in the molding step, drying by cooling is performed for 24 h under the conditions of a vacuum environment and 25 DEG C; under the vacuum condition, bubbles in the mixed rubber can be removed; slow cooling at the room temperature is not easy to cause cracks of the rubber while the rubber is dried, and consequently, the rubber is more compact; the adoption of a polyurethane film mainly takes good effect of chloroprene rubber into account; however, the middle part of the polyurethane film is easier to consume as compared with the two end parts; therefore, two polyurethane films are added to prolong the service life of the flame retardant rubber.
Description
technical field [0001] The invention relates to the field of rubber manufacturing, in particular to a method for manufacturing flame-retardant rubber. Background technique [0002] Rubber: A highly elastic polymer material with reversible deformation. It is elastic at room temperature, can produce large deformation under a small external force, and can return to its original shape after the external force is removed. Rubber is a completely amorphous polymer. Its glass transition temperature (Tg) is low, and its molecular weight is often large, greater than hundreds of thousands. Neoprene uses chloroprene as the main raw material and is copolymerized by homopolymerization or a small amount of other monomers. made. Such as high tensile strength, excellent heat resistance, light resistance, aging resistance, and oil resistance are superior to natural rubber, styrene-butadiene rubber, and butadiene rubber. It has strong flame resistance and excellent flame retardancy resistan...
Claims
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Application Information
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