Single-component heat-curing silk-screen printing silica gel and preparation method thereof
A heat curing, one-component technology, applied in dyeing, textiles and papermaking, etc., can solve the problems of poor adhesion, easy to clog the net, and waste, etc., and achieve strong adhesion, not easy to clog the net, and easy to use and operate Effect
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Embodiment 1
[0017] Add 100 parts of α,ω-dihydroxy polydimethylsiloxane and 200 parts of nano calcium carbonate into the vacuum kneader, keep the temperature at 100 ° C, dehydrate and blend for 120 minutes under the vacuum degree of 0.06 MPa, and cool to room temperature The base material was obtained, and then 100 parts of the base material, 5 parts of methyl tributyl ketoximo silane, 5 parts of vinyl tributyl ketoximo silane, 2 parts of γ-aminopropyl triethoxy silane and methyl alcohol were mixed at room temperature. 10 parts of base silicone oil was added into the high-speed dispersing stirring tank, stirred and mixed, and stirred for 120 minutes under the condition that the vacuum degree was 0.06MPa and the rotating speed was 100rpm, and then bis(ethyl acetoacetate) bis(isopropoxy)titanium was added. 0.01 part of the acid ester complex is stirred for 120 minutes under the conditions of a vacuum degree of 0.06 MPa and a rotational speed of 100 rpm, and then the material is discharged to ...
Embodiment 2
[0019] Add 100 parts of α, ω-dihydroxy polydimethylsiloxane and 5 parts of nano calcium carbonate into the vacuum kneader, keep the temperature at 120 ° C, dehydrate and blend for 30 minutes under the vacuum degree of 0.06 MPa, and cool to room temperature The base material was obtained, and then 100 parts of the base material, 10 parts of methyl tributyl ketoximinosilane, 0.5 parts of γ-aminopropyl triethoxysilane and 3 parts of methyl silicone oil were added to a high-speed dispersion stirring tank at room temperature Stir and mix inside, stir for 60 minutes under the condition that the degree of vacuum is 0.06MPa and the rotating speed is 20rpm, and then add 0.1 part of bis(ethyl acetoacetate) bis(isopropoxy) titanate complex, and under the condition of vacuum degree It is 0.06MPa, stirring for 120 minutes under the condition of rotating speed of 100rpm, and then discharging, and the one-component heat-curable screen printing silica gel can be obtained.
Embodiment 3
[0021] Add 100 parts of α,ω-dihydroxy polydimethylsiloxane, 25 parts of fumed silica and 50 parts of diatomaceous earth into the vacuum kneader, keep the temperature at 120 ° C, and dehydrate under the vacuum degree of 0.07 MPa Blend for 90 minutes, cool to room temperature to obtain a base material, then at room temperature 100 parts of base material, 10 parts of vinyl tributyl ketoximinosilane, N-β-aminoethyl-γ-aminopropyltrimethoxysilane 0.9 part and 15 parts of white oil were added to the high-speed dispersing stirring tank, stirred and mixed, and stirred for 120 minutes under the condition that the vacuum degree was 0.07MPa and the rotation speed was 200rpm, and then 0.3 part of isopropyl titanate was added, and the vacuum degree was 200 rpm. 0.07MPa, stirring for 120 minutes under the condition of rotating speed of 200rpm, and then discharging, one-component heat-curable screen printing silica gel can be prepared.
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