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Antibacterial silane modified sealant and preparation method thereof
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A silane-modified, antibacterial technology, applied in the field of sealants, to achieve excellent and long-lasting antibacterial properties
Active Publication Date: 2020-04-03
SHANGHAI DONGDA CHEM
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Description
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Problems solved by technology
This sealant does not contain other harmful volatile components such as free isocyanate agents
Method used
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Embodiment 1
[0091] A kind of antibacterial silane modified sealant, it is made by following preparation method:
[0092] (1) Put 40g DINP and 90g PCC-P into the reaction kettle, stir at 500r / min at high speed while passing steam to raise the temperature to 110°C, vacuumize and dehydrate under negative pressure for 2 hours, after testing the moisture content, cool down to 50°C and add 50g of SMP 8010, 1g of B75, 3g of Silquest A-171, 2g of Dynasylan 1189, 4g of Aerosil R974 were stirred evenly and cooled by circulating cooling water.
[0093] (2) After 1 hour, add 0.4g of dibutyltin dilaurate at a temperature lower than 50°C, stir for half an hour under the condition of cooling water circulation, and discharge to obtain an antibacterial silane-modified sealant.
Embodiment 2
[0095] A kind of antibacterial silane modified sealant, it is made by following preparation method:
[0096] (1) Put 40g DINP and 90g PCC-P into the reaction kettle, stir at 500r / min at high speed while passing steam to raise the temperature to 110°C, vacuumize and dehydrate under negative pressure for 2 hours, after testing the moisture content, cool down to 50°C and add 50g of SMP 8020, 1g of B75, 3g of Silquest A-171, 2g of Dynasylan 1189, 4g of Aerosil R974 were stirred evenly and cooled by circulating cooling water.
[0097] (2) After 1 hour, add 0.4g of dibutyltin dilaurate at a temperature lower than 50°C, stir for half an hour under the condition of cooling water circulation, and discharge to obtain an antibacterial silane-modified sealant.
Embodiment 3
[0099] A kind of antibacterial silane modified sealant, it is made by following preparation method:
[0100](1) Put 40g DINP and 90g PCC-P into the reaction kettle, stir at 500r / min at high speed while passing steam to raise the temperature to 110°C, vacuumize and dehydrate under negative pressure for 2 hours, after testing the moisture content, cool down to 50°C and add 50g of SMP 8030, 1g of B75, 3g of Silquest A-171, 2g of Dynasylan 1189, 4g of Aerosil R974 were stirred evenly and cooled by circulating cooling water.
[0101] (2) After 1 hour, add 0.4g of dibutyltin dilaurate at a temperature lower than 50°C, stir for half an hour under the condition of cooling water circulation, and discharge to obtain an antibacterial silane-modified sealant.
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Abstract
The invention relates to a preparation method of an antibacterial silane modified sealant, and the preparation method comprises the following steps: (1) uniformly mixing a plasticizer and a first filler assistant at a first temperature, and carrying out negative pressure dehydration on the mixture system under vacuum conditions to obtain a first reaction mixture; (2) uniformly mixing the first reaction mixture, an antibacterial silane modified polymer and a second filler aid at a second temperature to obtain a second reaction mixture; and (3) uniformly mixing the second reaction mixture, a catalyst and a plasticizer at a third temperature to obtain the antibacterial silane modified sealant. The invention also relates to the antibacterial silane modified sealant prepared by the method. Theinvention further relates to a curing method of the antibacterial silane modified sealant. The antibacterial silane modified sealant is excellent and lasting in antibacterial performance, the antibacterial silane modified sealant is cured and cured in the air for a week in a moisture mode, and the mildew-proof grade of the antibacterial silane modified sealant is 0 grade or 1 grade.
Description
technical field [0001] The present application relates to the technical field of sealants, in particular to an antibacterial silane-modified sealant and a preparation method thereof. Background technique [0002] Sealant products are widely used in various industries, including civil construction, home decoration and industrial assembly and other fields. In the process of use, the special performance requirements of the sealant itself are gradually increasing. The household market of sealant is very large, and it is used in all aspects of life, such as glue for door and window frames, glue for table basins, glue for kitchen sinks, glue for sealing around toilets, and glue for wet and dry separation of bathrooms. As mentioned above, the sealants used in these household areas are mostly used in humid environments, and the biggest problem is mildew of the strips. Mildew of the adhesive strips makes the overall appearance very ugly and deteriorates the user experience. Theref...
Claims
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Application Information
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