A preparation method of high toughness and low water absorption carbon-oxygen cross-linked polyvinyl acetal insulating material
A technology of polyvinyl acetal and low water absorption, which is applied in the field of polymer materials to achieve the effects of shortening condensation time, stable quality and high yield
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[0035] A continuous preparation method of a carbon-oxygen cross-linked polyvinyl acetal insulating material with high toughness and low water absorption, the steps are as follows:
[0036] Step 1: Preparation of polyvinyl alcohol-acetaldehyde water emulsion
[0037] Add 650 parts by mass of water into the dissolution tank, add 52 parts by mass of polyvinyl alcohol under stirring, keep warm at 25°C for 1.5h, raise the temperature to 95°C and keep warm for 1.5h, and when the temperature is lowered to 65°C, filter to obtain polyvinyl alcohol Vinyl alcohol aqueous solution, and then 10 parts by mass of acetaldehyde aqueous solution was added to the solution at a temperature of 35°C, and stirred for 60 minutes to obtain a polyvinyl alcohol-acetaldehyde aqueous emulsion
[0038] Step 2: Preparation of polyvinyl alcohol-acetaldehyde-hydrochloric acid aqueous emulsion
[0039] Cool the uniformly stirred polyvinyl alcohol-acetaldehyde water emulsion to 13°C, and add a hydrochloric aci...
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