Metal protective agent and preparation method and use thereof, and hot-dip plated metal material
A metal protection and hot-dip metal technology, applied in the direction of anti-corrosion coatings, polyester coatings, epoxy resin coatings, etc., can solve the problems of poor corrosion resistance of the protective film, and achieve the effect of excellent storage resistance and excellent corrosion resistance
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[0013] The invention provides a method for preparing a metal protective agent, which comprises mixing water, a silane coupling agent, a water-soluble silicate, a silicon oxide filler, and a water-soluble film-forming resin in sequence; the silane coupling agent contains The first silane coupling agent and the second silane coupling agent; wherein the first silane coupling agent is CH 2 =CHSi(OCH 3 ) 3 、CH 2 =CHSi(OC 2 h 5 ) 3 、CH 2 =CHSiCH 3 (OCH 3 ) 2 、CH 2 =CHSiCH 3 (OC 2 h 5 ) 2 and CH 2 =CHSi(OCH 2 CH 2 OCH 3 ) 3 In at least one, the second silane coupling agent is HS (CH 2 ) 3 Si(OCH 3 ) 3 、HS(CH 2 ) 3 Si(OC 2 h 5 ) 3 、HS(CH 2 ) 3 SiCH 3 (OCH 3 ) 2 and HS(CH 2 ) 3 SiCH 3 (OC 2 h 5 ) 2 at least one of the
[0014] Wherein, in detail, the method includes: (1) uniformly mixing water and the silane coupling agent to obtain a uniform liquid A; (2) uniformly mixing the uniform liquid A and a water-soluble silicate to obtain a uniform liqui...
Embodiment 1
[0052] Mix 28 parts by weight of water and 1.6 parts by weight of silane coupling agent (composed of the first silane coupling agent and the second silane coupling agent) at a stirring speed of 1500 rpm to obtain uniform liquid A, Among them, the first silane coupling agent is CH 2 =CHSi(OCH 3 ) 3 , purchased from Hubei Debang Chemical New Material Co., Ltd., brand DB-171, the second silane coupling agent is (HS(CH 2 ) 3 Si(OCH 3 ) 3 , purchased from Hubei Debang Chemical New Material Co., Ltd., brand DB-590, the weight ratio of the first silane coupling agent and the second silane coupling agent is 1.5:1.
[0053] Mix all the uniform liquid A and 1 part by weight of water-soluble silicate (sodium metasilicate pentahydrate, purchased from Qingdao Darun Chemical Co., Ltd.) at a stirring speed of 1500 rpm until uniform to obtain uniform liquid B .
[0054] All the homogeneous liquid B and 0.72 parts by weight of silica filler (nano silica sol, purchased from Shandong Bait...
Embodiment 2
[0067] Mix 25 parts by weight of water and 1.4 parts by weight of silane coupling agent (composed of the first silane coupling agent and the second silane coupling agent) at a stirring speed of 1500 rpm to obtain a homogeneous liquid A, Among them, the first silane coupling agent is CH 2 =CHSi(OC 2 h 5 ) 3 , purchased from Hubei Debang Chemical New Material Co., Ltd., brand DB-151, the second silane coupling agent is HS (CH 2 ) 3 Si(OC 2 h 5 ) 3 , purchased from Hubei Debang Chemical New Material Co., Ltd., brand DB-580, the weight ratio of the first silane coupling agent and the second silane coupling agent is 1.4:1.
[0068] All of the uniform liquid A and 1 part by weight of water-soluble silicate (potassium silicate, purchased from Baoding Runfeng Industrial Co., Ltd.) were mixed until uniform at a stirring speed of 1500 rpm to obtain a uniform liquid B.
[0069] Mix all the homogeneous liquid B and 0.6 parts by weight of silica filler (nano-silica sol, purchased f...
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