Hydrolysis-resistant PC/PBT alloy material and preparation method thereof
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An alloy material and hydrolysis-resistant technology, applied in the field of engineering plastics, can solve the problems of decreased mechanical properties and chemical resistance of alloy materials, decreased mechanical strength of alloy materials, decreased relative molecular weight, etc., so as to improve hydrolysis resistance and mechanical strength, Enhanced weatherability, good chemical and water resistance
Pending Publication Date: 2022-03-25
宁波瑞隆新材料科技有限公司
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Problems solved by technology
Decrease the relative molecular weight of PC and PBT, thereby reducing the mechanical properties and chemical resistance of alloy materials
In addition, since PBT resin is a polyester material with ester bonds in its molecule, in some high-temperature and humid environments, when the ambient temperature is higher than its glass transition temperature, the PBT resin itself is also prone to hydrolysis, which in turn affects Due to the weather resistance of PC / PBT alloy material products, the mechanical strength of the alloy material is greatly reduced when it is used for a long time or in a high temperature and high humidity environment. The above defects greatly limit the application of PC / PBT alloy materials
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Embodiment 1
[0044] This embodiment discloses a hydrolysis-resistant PC / PBT alloy material, including the following raw material components in weight percentages:
[0045] PC resin 40.4%;
[0046] PBT resin 35.3%;
[0047] Glass fiber 20.7%;
[0048] Hydrolysis resistance agent 0.5%;
[0049] Transesterification inhibitor 0.2%;
[0050] Heat stabilizer 0.1%;
[0051] Other additives 3%.
[0052] The preparation method is as follows:
[0053] S1. Dry PC resin, PBT resin and glass fiber at 80-120°C for 20 minutes respectively;
[0054] S2. Mix the dried PC resin, PBT resin, transesterification inhibitor, hydrolysis resistance agent, heat stabilizer and other additives evenly to obtain a mixed raw material;
[0055] S3. The above-mentioned mixed raw materials are fed from the main feeding port of the twin-screw extruder, and the glass fiber is fed from the side feeding port of the twin-screw extruder, and then cooled, dried, and pelletized to obtain PC / PBT alloy material.
[0056] in:...
Embodiment 2
[0062] The difference between this embodiment and embodiment 1 is:
[0063] PC resin 35.2%;
[0064] PBT resin 30.1%;
[0065] Glass fiber 30.2%;
[0066] Anti-hydrolysis agent 1%;
[0067] Transesterification inhibitor 0.4%;
[0068] Heat stabilizer 0.5%;
[0069] Other additives 3%.
Embodiment 3
[0071] PC resin 35.2%;
[0072] PBT resin 30.1%;
[0073] Glass fiber 30.2%;
[0074] Anti-hydrolysis agent 1%;
[0075] Transesterification inhibitor 0.6%;
[0076] Heat stabilizer 0.5%;
[0077] Other additives 3%.
[0078] Wherein, the glass fiber is E-CR glass fiber; the hydrolysis-resistant agent is phenyl glycidyl ether.
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Abstract
The invention relates to the technical field of engineering plastics, and particularly discloses a hydrolysis-resistant PC / PBT alloy material and a preparation method thereof. The hydrolysis-resistant PC / PBT alloy material comprises the following components in percentage by weight: PC resin, PBT resin, glass fibers, a hydrolysis-resistant agent, a transesterification inhibitor, a heat stabilizer and other auxiliaries. The preparation method comprises the following steps: respectively drying the PC resin, the PBT resin and the glass fiber; uniformly mixing the dried PC resin, PBT resin, a hydrolysis-resistant agent, a transesterification inhibitor, a heat stabilizer and other auxiliaries to obtain a mixed raw material; and mixing the mixed raw materials with the glass fibers, carrying out melt extrusion, cooling, drying and pelletizing to obtain the hydrolysis-resistant PC / PBT alloy material. According to the PC / PBT alloy material, the ester exchange inhibitor, the glass fiber, the hydrolysis-resistant agent and the heat stabilizer which are reasonably compounded are added into the PC / PBT alloy material, so that the hydrolysis resistance and flame retardance of the PC / PBT alloy material are effectively improved.
Description
technical field [0001] The application relates to the technical field of engineering plastics, more specifically, it relates to a hydrolysis-resistant PC / PBT alloy material and a preparation method thereof. Background technique [0002] PC / PBT (polycarbonate / polybutylene terephthalate) alloy material combines the advantages of polycarbonate and polybutylene terephthalate, which not only has the excellent impact resistance of PC materials Performance, heat resistance, high strength and low molding shrinkage; it also has excellent mechanical strength, chemical resistance, electrical insulation and processability of PBT materials. Based on the above advantages, PC / PBT alloy materials are widely used in automobiles, motors, electronics, household appliances and other fields. [0003] PC / PBT alloy materials are prone to transesterification reactions between PC and PBT during processing. Since the PC chain end has -OH groups, and the PBT chain ends have -COOH and -OH groups, in t...
Claims
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Application Information
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