Flame-retardant bulk molding plastic and preparation method thereof
A slug molding compound, flame retardant technology, applied in the field of non-metallic materials to achieve the effect of improving flame retardant performance, improving apparent quality and reducing volume shrinkage rate
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Examples
Embodiment 1
[0027] This example is a sample without adding flame retardant brominated polystyrene and antimony trioxide.
[0028] Its formula, preparation process and product performance are as follows:
[0029] 1. Mix 9 parts of styrene and polystyrene evenly in a high-speed mixer to prepare a low-shrinkage agent for bulk molding compounds.
[0030] 2. Add 19 parts of 3110 type unsaturated polyester produced by Changzhou Huari New Material Co., Ltd., low shrinkage agent, 0.5 part of initiator, 0.1 part of antioxidant, 0.6 part of pigment paste into the kneader and mix for 5 minutes.
[0031] 3. Mix 1.8 parts of zinc stearate, 6 parts of Al(OH) 3 (58μm), 4 parts Al(OH) 3 (38μm), 16 parts CaCO 3 (18μm), 15 parts CaCO 3 (13μm) into the kneader and mixed for 45min.
[0032] 4. Evenly add 18 parts of 6mm long glass fiber, sprinkle within 2 minutes, and continue to stir for 5 minutes.
[0033] 5. Take out the material, put it into a plastic bag, tie the mouth of the bag tightly, and leav...
Embodiment 2
[0040] This embodiment is a sample with 2 parts of flame retardant brominated polystyrene added. Compared with Example 1, the flame retardant level was increased from V-1 to V-0, the oxygen index was increased from 25 to 31, the volume shrinkage rate was reduced from 0.15% to 0.12%, and the bending strength and impact strength did not change significantly. Experiments show that a small amount of brominated polystyrene can improve the flame retardancy of the sample, reduce the volume shrinkage, and have little effect on the mechanical properties.
[0041] Its formula, preparation process and product performance are as follows:
[0042] 1. Mix 9 parts of styrene with polystyrene and 2 parts of brominated polystyrene in a high-speed mixer to prepare a low-shrinkage agent for bulk molding compounds.
[0043] 2. Add 19 parts of 3110 type unsaturated polyester produced by Changzhou Huari New Material Co., Ltd., low shrinkage agent containing brominated polystyrene, 0.5 part of init...
Embodiment 3
[0053]In this example, 2 parts of brominated polystyrene and 2 parts of antimony trioxide were added. Compared with Example 1, its flame retardant level is increased from V-1 to V-0, its oxygen index is increased from 25 to 34, its volume shrinkage rate is reduced from 0.15% to 0.10%, and its bending strength and impact strength are slightly improved. Experiments show that a small amount of brominated polystyrene and antimony trioxide can improve the flame retardancy of the sample, reduce the volume shrinkage, and have little effect on the mechanical properties. Compared with Example 2, the flame retardant performance of this example is further improved, indicating that brominated polystyrene and antimony trioxide have a synergistic flame retardant effect.
[0054] Its formula, preparation process and product performance are as follows:
[0055] 1. Mix 9 parts of styrene with polystyrene and 2 parts of brominated polystyrene in a high-speed mixer to prepare a low-shrinkage ag...
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Abstract
Description
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