Special adhesive resin for steel-plastic composite pipe and preparation method thereof
A steel-plastic composite pipe, bonding resin technology, applied in the direction of adhesives, adhesive types, adhesive additives, etc., can solve the problems of low initial viscosity and unfavorable metal bonding, and achieve high initial bonding strength and excellent adhesion Good junction performance and corrosion resistance
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Embodiment 1
[0025] This embodiment provides a special bonding resin for steel-plastic composite pipes. The raw materials required for preparation include:
[0026]
[0027]
[0028] Wherein, the polyurethane is made by reacting polyoxypropylene triol, polyoxypropylene diol and diphenylmethane diisocyanate; the polyamide resin is a dimer fatty acid polyamide with a relative molecular weight of 6000; the thermoplastic resin is ethylene - vinyl acetate copolymer; the tackifier is a hydrogenated terpene resin; the antioxidant is a hindered phenolic antioxidant.
[0029] The preparation method of the above-mentioned special bonding resin for steel-plastic composite pipes comprises:
[0030] S1. Put polyoxypropylene triol, polyoxypropylene diol and diphenylmethane diisocyanate into the reactor at a ratio of 2:1:5, and react at 80° C. for 3 hours to prepare polyurethane;
[0031] S2, mixing the raw materials required for each preparation according to the proportion;
[0032] S3, adding t...
Embodiment 2
[0035] This embodiment provides a special bonding resin for steel-plastic composite pipes. The raw materials required for preparation include:
[0036]
[0037] Wherein, the polyurethane is made by reacting polyoxypropylene triol, polyoxypropylene diol and diphenylmethane diisocyanate; the polyamide resin is a dimer fatty acid polyamide with a relative molecular weight of 8000; the thermoplastic resin is ethylene - ethyl acrylate copolymer, styrene-isoprene-styrene copolymer and styrene-butadiene-styrene copolymer; the tackifier is rosin resin and petroleum resin; the antioxidant is Phosphite antioxidants and hindered aromatic amine antioxidants.
[0038] The preparation method of the above-mentioned special bonding resin for steel-plastic composite pipes comprises:
[0039] S1. Put polyoxypropylene triol, polyoxypropylene diol and diphenylmethane diisocyanate into the reactor at a ratio of 2:1:5, and react at 80° C. for 3 hours to prepare polyurethane;
[0040] S2, mixin...
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