High-weatherability plastic and processing technology thereof
A weather-resistant, plastic technology, applied in coatings and other directions, can solve problems such as reducing the service life of plastics, discoloration, fading, etc.
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preparation example 1
[0054] Grape seed proanthocyanidin extract is prepared by the following method:
[0055] S1: Dry 0.8g of dried grape seeds at 38°C for 1.5h, then freeze at -20°C for 25min, crush and sieve to obtain grape seed powder, use petroleum ether as a degreasing solvent, and extract grape seeds The powder is mixed with 95g of petroleum ether, extracted at a temperature of 70°C for 23 hours, and dried at a temperature of 38°C to obtain defatted grape seed powder;
[0056] S2: Mix 1 g of defatted grape seed powder with 98 g of 70% ethanol by volume as a solvent, and extract at a pressure of 7.5 MPa and a temperature of 70° C. for 14 minutes to obtain a grape seed proanthocyanidin extract.
preparation example 2
[0058] Grape seed proanthocyanidin extract is prepared by the following method:
[0059] S1: Dried 1.0g of dried grape seeds at 40°C for 2.0h, then frozen at minus 17.5°C for 30min, crushed and sieved to obtain grape seed powder, and used petroleum ether as a degreasing solvent. The powder was mixed with 97.5g of petroleum ether, extracted at a temperature of 75°C for 24 hours, and dried at a temperature of 40°C to obtain defatted grape seed powder;
[0060] S2: Mix 1.1 g of defatted grape seed powder with 99 g of 71.5% ethanol by volume as a solvent, and extract for 15 min at a pressure of 7.75 MPa and a temperature of 72.5° C. to obtain proanthocyanidin extracts from grape seeds.
preparation example 3
[0062] Grape seed proanthocyanidin extract is prepared by the following method:
[0063] S1: Dry 1.2g of dried grape seeds at 42°C for 2.5 hours, then freeze at -15°C for 35 minutes, crush and sieve to obtain grape seed powder, use petroleum ether as a degreasing solvent, and extract grape seeds The powder is mixed with 100g of petroleum ether, extracted at a temperature of 80°C for 25 hours, and dried at a temperature of 42°C to obtain defatted grape seed powder;
[0064] S2: Mix 1.2 g of defatted grape seed powder with 100 g of 72% ethanol by volume as a solvent, and extract for 16 min at a pressure of 8.0 MPa and a temperature of 75° C. to obtain a grape seed proanthocyanidin extract.
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Abstract
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