Preparation method of foaming silicon rubber material with low thermal conductivity factor
A low thermal conductivity, foamed silicone rubber technology, applied in the field of preparation of foamed silicone rubber materials, can solve the problems of loss of softness and heat insulation, increase of thermal conductivity of foamed silicone rubber materials, hardening, etc., to achieve improvement The effect of mechanical properties
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Embodiment 1
[0028] With 100 grams of methyl vinyl silicone rubber raw rubber (Tianyuan Resin Factory, the trademark is 110-2), 20g particle diameter is the hollow glass microsphere (3M company, the trademark is K15) of 105 microns, in two-roller mill Mixing at room temperature for 15 minutes, then add 5g of dinitrosopentamethylenetetramine (foaming agent), 5g of urea (foaming aid), further mixing for 10 minutes, and finally add 1.2g of benzene peroxide tert-butyl formate (curing agent), knead for 4 minutes. The mixed rubber material was parked for 24 hours, and the vulcanization curve of the rubber material was measured to obtain the positive vulcanization time. The rubber was vulcanized on a flat vulcanizer at 170°C for 10 minutes to obtain a foamed silicone rubber material with a thickness of 1 mm, and its properties are shown in Table 1.
Embodiment 2
[0030] With 100 grams of methyl vinyl silicone rubber raw rubber (Tianyuan Resin Factory, the brand is 110-2), 18g particle diameter is the hollow glass microsphere of 110 microns (3M company, the brand is K1), in HAAKE internal mixer Mixing 6 minutes under the room temperature condition, add 4g azodicarbonamide (foaming agent), 2g zinc oxide (profoaming agent) again, further mixing 3 minutes, finally add 1g2,5-benzoyl peroxide ( Vulcanizing agent), kneading for 2 minutes. The mixed rubber material was parked for 36 hours, and the curing curve of the rubber material was measured to obtain the positive curing time. The rubber was vulcanized on a flat vulcanizer at 165°C for 7 minutes to obtain a foamed silicone rubber material with a thickness of 5mm, and its properties are shown in Table 1.
Embodiment 3
[0032] With 100 grams of methyl vinyl silicone rubber raw rubber (Tianyuan Resin Factory, the brand is 110-2), 30 grams of hollow glass beads with a particle size of 10 microns (Handan Weichao New Thermal Insulation Material Co., Ltd.) Mixing 20 minutes under the condition of room temperature in the mill, add 8g diphenylsulfonyl hydrazide ether (foaming agent, provided by Jinjin Trading Co., Ltd.), further mixing 8 minutes, finally add 1.4g tert-butyl peroxybenzoate ester (vulcanizing agent), knead for 5 minutes. The mixed rubber material was parked for 48 hours, and the curing curve of the rubber material was measured to obtain the positive curing time. The rubber was vulcanized on a flat vulcanizer at 150°C for 12 minutes to obtain a foamed silicone rubber material with a thickness of 2 mm, and its properties are shown in Table 1.
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