A kind of hot-melt adhesive for high-frequency transmission with low dielectric constant, adhesive film and preparation method thereof
A low dielectric constant, high-frequency transmission technology, applied in the field of hot-melt adhesives, can solve the problems of reducing the service life of hot-melt adhesive films, affecting the quality of hot-melt adhesive films, and large signal transmission losses, etc., to improve shrinkage defects, Improves mechanical strength and adhesion, and improves productivity
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[0035] A second aspect of the present invention provides a method for preparing a low-dielectric constant high-frequency transmission hot-melt adhesive, comprising the following steps:
[0036] S1. According to the weight ratio, dissolve 30-50 parts of saturated polyester resin in 70-100 parts of a mixed solvent of butanone and toluene, the volume ratio of butanone and toluene is (2-3):1, and then add 20 ~30 parts of flame retardant, 5~10 fillers; first disperse at a speed of 1000~1500 rpm for 60~80 minutes, after the dispersion is uniform, use a grinder to grind to below 5 μm, and then disperse at a speed of 100~200 rpm 30-50 minutes to disperse to obtain A component;
[0037] S2. Dissolve 0.5-5 parts of curing agent in 10-20 parts of methyl ethyl ketone solvent, and stir evenly to obtain component B;
[0038] S3. Add the B component to the A component, add 1-5 leveling agents, and disperse at a speed of 200-500 rpm for 30-50 minutes to obtain the hot melt adhesive.
[0039...
Embodiment 1
[0045] Embodiment 1 provides a low-dielectric constant high-frequency transmission hot melt adhesive and its preparation method. The preparation raw materials include: 40 parts of saturated polyester resin, 3 parts of curing agent, 3 parts of leveling agent, flame retardant 25 parts of agent, 8 parts of filler.
[0046] The saturated polyester resin is a mixture of crystalline polyester resin and non-crystalline polyester resin, with a weight ratio of 9:1; the molecular weight of non-crystalline polyester resin is 30000, purchased from Shanghai Haoyang Industrial Development Co., Ltd., model for #673.
[0047] The crystalline polyester resin is a mixture of crystalline polyester resin A and crystalline polyester resin B, the weight ratio is 3:1, the glass transition temperature of the crystalline polyester resin A is 27°C, and the hot melt viscosity 1500dPa·s, molecular weight 20000, purchased from Shanghai Haoyang Industrial Development Co., Ltd., model GA-1310; the glass tr...
Embodiment 2
[0059] Similar to Example 1, a low-dielectric constant high-frequency transmission hot-melt adhesive and its adhesive film and preparation method are provided, but in the hot-melt adhesive preparation raw materials, by weight, include: 30 parts of saturated polyester resin , 0.5 parts of curing agent, 1 part of leveling agent, 20 parts of flame retardant, 5 parts of filler.
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