Patent ID: 11939487
Assignee: CHINA MACHINERY FOUNDRY MATERIAL TECHNOLOGY (FUJIAN) CO., LTD
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 9:
10. A preparation method for the spirooxazine photochromic exterior wall coating of claim 5, comprising the following steps:
S1. measuring: measuring 0.6%-1.5% of spirooxazine photochromic compound, 40%-45% of resin, 0.3%-1% of dispersant, 0.2%-0.3% of antifoamer, 1%-3% of additive, 22%-24% of pigment and 30%-32% of solvent;
S2. grinding: mixing the spirooxazine photochromic compound and the pigment measured in S1 and then grinding into powder with fineness of 100-300-mesh sieve;
S3. dispersing: adding 50 wt % of resin measured in step S1, dispersant, 30 wt % of solvent measured in S1, and mixed powder obtained in step S2 to a high-speed disperser and dispersing for 10-15 min at rotation speed of 1500-1800 r/min;
S4. mixing: putting the materials obtained in S3 into a mixing container, adding the remaining resin, solvent, antifoamer and additive, and stirring and mixing for 30-50 min at the rotation speed of 450-600 r/min;
S5. adjusting pH: adjusting pH with 1 mol/L NaOH solution, so that PH value is 8-8.5;
S6. filtering: filtering out insoluble solid impurities with a 100-300-mesh sieve to obtain the spirooxazine photochromic exterior wall coating.