Sealing agent and preparation method thereof
A technology of sealing agent and film-forming agent, applied in the field of sealing agent and its preparation, can solve the problems of long release time of harmful gas molecules, high treatment cost, threat to health, etc., and achieve easy large-scale industrial production, economic and social benefits. The effect of high and efficient sealing plate
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[0023] In order to better illustrate and understand the present invention, the composition, preparation method and effect of the present invention will be described in detail below with specific examples, but the present invention is not limited in any form. The reagents used can be obtained from commercial sources unless otherwise specified. Table 1 lists composition examples of the blocking agent of the present invention.
[0024] Table 1 Examples of sealant composition
[0025]
[0026] The above-mentioned chitosan and / or its derivatives preferably have a degree of deacetylation of 80-95% and a viscosity not greater than 0.25 Pa·s.
[0027] Chitosan and / or its derivatives with medium or high degree of deacetylation are selected, which have better film-forming performance, more amino groups in the molecule, and are more conducive to the reaction of free formaldehyde at the interface. The viscosity is more suitable for hydroxypropyl The combination of methyl cellulose ach...
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