A kind of low water absorption phenolic resin insulating glue
A phenolic resin, low water absorption technology, applied in the direction of adhesives, aldehyde/ketone condensation polymer adhesives, adhesive types, etc., can solve the problems of fast water absorption, decreased insulation performance, etc., to achieve full reaction and cost reduction , the effect of simple process
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specific Embodiment approach 1
[0020] Specific embodiment one: A kind of low water-absorbing phenolic resin insulating glue of this embodiment consists of 155 to 190 parts of phenol, 14 to 20 parts of NaOH solution, 270 to 345 parts of formaldehyde solution and 4.7 parts by weight. The composition is composed of γ-aminopropyltriethoxysilane of 1 to 15 parts; the NaOH solution is a NaOH aqueous solution with a mass fraction of 40% to 50%, and the formaldehyde solution is a formaldehyde aqueous solution with a mass fraction of 37% to 39%.
specific Embodiment approach 2
[0021] Specific embodiment two: the preparation method of a kind of low water-absorbing phenolic resin insulating glue of this embodiment is carried out according to the following steps:
[0022] 1. Weigh 155 to 190 parts of phenol, 14 to 20 parts of NaOH solution, 270 to 345 parts of formaldehyde solution and 4.7 to 15 parts of γ-aminopropyltriethoxysilane in parts by weight ; The formaldehyde solution taken by weighing is divided into two parts A and B, wherein the quality of A is 70%~85% of the total mass of formaldehyde solution, and the quality of B is 15%~30% of the total mass of formaldehyde solution; the NaOH solution It is an aqueous NaOH solution with a mass fraction of 40% to 50%, and the formaldehyde solution is an aqueous formaldehyde solution with a mass fraction of 37% to 39%;
[0023] 2. Add the phenol weighed in step 1 into the container, melt at 40°C-50°C, then add the NaOH solution weighed in step 1 to obtain a mixed solution, and react for 8min-12min;
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specific Embodiment approach 3
[0027] Specific embodiment 3: The difference between this embodiment and specific embodiment 2 is that in step 1, 172 parts of phenol are weighed in parts by weight. Other steps and parameters are the same as those in the second embodiment.
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