Resin composition for solar backsheet base material and preparation method
A technology of resin composition and solar backsheet, which is applied in the direction of electrical components, circuits, semiconductor devices, etc., can solve the problems of poor cold resistance, low water absorption, low water vapor, etc., and achieves simple and easy preparation method and excellent low temperature shock resistance performance, low water vapor transmission rate
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Embodiment 1
[0037] A kind of resin composition for solar backboard base material, its preparation method is as follows:
[0038] (1) Preparation of toughening agent A208
[0039] 100 parts (parts by mass) of LLDPE7042 (Beijing Yanshan Petrochemical Company, whose melt flow rate is 2.0 g / 10 min at 190 °C / 2.16 kg), 2 parts of vinyltrimethoxysilane A151 (Dow Corning Corporation of the United States), 0.2 parts of DCP The initiator (Tianjin Aksu Company) was measured separately and added to the mixer for mixing and homogenization. After two hours of homogenization, it was put into a twin-screw extruder for melt extrusion and granulation; mm, length-to-diameter ratio 33, screw temperature controlled at 160~220°C, screw speed controlled at 100 rpm, residence time of the material in the screw is 2~4 minutes;) Cooling and pelletizing to obtain granular toughening agent A208, Its melt flow rate at 190°C / 2.16kg is 0.2g / 10min;
[0040] The LLDPE7042 (Beijing Yanshan Petrochemical Company) is a lin...
Embodiment 2
[0044] A kind of resin composition for solar backboard base material, its preparation method is as follows:
[0045] (1) Preparation of toughening agent A208, see Example 1;
[0046] (2) 25 parts of A208, 75 parts of block copolymer polypropylene K8303, and 10 parts of wollastonite were measured and mixed uniformly, and put into a twin-screw extruder for melt extrusion and granulation; the twin-screws used exhaust screws, The diameter of the screw is 75 mm, the aspect ratio is 33, the temperature of the screw is controlled at 160~220°C, the speed of the screw is controlled at 100 rpm, and the residence time of the material in the screw is 2~4 minutes; the material is cooled, pelletized and dried. The finished product S2 has a melt flow rate of 1.0 g / 10 min at 230°C / 2.16 kg, and the material performance test is shown in Table 1.
Embodiment 3
[0048] A kind of resin composition for solar backboard base material, its preparation method is as follows:
[0049] (1) Preparation of toughening agent A208, see Example 1;
[0050] (2) 33 parts of A208 and 67 parts of polypropylene 1300 (Beijing Yanshan Petrochemical Company, whose melt flow rate is 1.5 g / 10 min at 230 °C / 2.16 kg), and 10 parts of wollastonite were measured and mixed uniformly, and put into Melting extrusion granulation is carried out in the twin-screw extruder; the twin-screw adopts exhaust screw, the screw diameter is 75 mm, the aspect ratio is 33, the screw temperature is controlled at 160~220 ° C, the screw speed is controlled at 100 rpm, and the material The residence time in the screw is 2~4 minutes; the material is finished product S3 after being cooled, pelletized and dried, and its melt flow rate at 230℃ / 2.16kg is 0.9g / 10min.
[0051] The polypropylene 1300 is a homopolypropylene produced by Beijing Yanshan Petrochemical Company, with a DSC melting...
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