Flame-retarding paint for casting Mg-alloy and its preparing process
A technology of lost foam casting and flame retardant coating, applied in the field of magnesium alloy lost foam casting coating, magnesium alloy lost foam casting coating and its preparation, which can solve the problems affecting the mechanical properties of castings, surface defects of castings, pores of castings, etc. Spreadability, strong thixotropy, effect of reducing porosity
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Embodiment 1
[0010] Magnesium alloy lost foam casting flame retardant coating composition (mass percentage): magnesia powder 30%, pearl powder 30%, mica powder 25%, silica sol 4%, white latex 4%, polyacrylamide 0.8%, carboxymethyl fiber Sodium 0.7%, palygorskite clay 5%, sodium alkylsulfonate 0.2%, boric acid 0.3%.
[0011] Mix palygorskite clay with 30 parts of water and grind it in a colloid mill or ball mill for 3 hours to make nail polish. Sodium carboxymethyl cellulose is mixed with 20 parts of water and stirred evenly in a blender to make liquid B. Mix polyacrylamide with 20 parts of hot water to make liquid acrylic. Then put magnesia powder, pearl powder, mica powder, sodium alkylsulfonate and boric acid into a colloid mill or ball mill, add liquid A, liquid B, liquid C, silica sol, and white latex to grind for 1 hour, and then Add appropriate amount of water to the mixer and stir for 2 hours to get the magnesium alloy lost foam casting flame retardant coating.
[0012] When in u...
Embodiment 2
[0014] Magnesium alloy lost foam casting flame retardant coating composition (mass percentage): magnesia powder 45%, pearl powder 20%, mica powder 20%, silica sol 5%, white latex 3%, polyacrylamide 0.5%, carboxymethyl fiber Sodium 0.3%, attapulgite clay 5%, sodium alkylsulfonate 0.4%, sulfur 0.8%.
[0015] Mix the attapulgite clay with 20 parts of water and grind it in a colloid mill or ball mill for 4 hours to make nail polish. Mix sodium carboxymethyl cellulose with 20 parts of water to make solution B. Mix polyacrylamide with 20 parts of hot water to make liquid acrylic. Then put magnesia powder, pearl powder, mica powder, sodium alkylsulfonate and sulfur into a colloid mill or ball mill, add liquid A, liquid B, liquid C, silica sol, and white latex to grind for 2 hours, and then Add appropriate amount of water to the mixer and stir for 1 hour to get the magnesium alloy lost foam casting flame retardant coating.
[0016] When in use, apply a 0.8mm-thick paint on the surf...
Embodiment 3
[0017] Magnesium alloy lost foam casting flame retardant coating composition (mass percentage): magnesia powder 40%, pearl powder 20%, mica powder 25%, silica sol 9%, white latex 2%, polyacrylamide 0.6%, carboxymethyl fiber Sodium 0.2%, palygorskite clay 2%, NH 4 BF 4 0.6%, sulfur 0.6%.
[0018] Mix palygorskite clay with 15 parts of water and grind it in a colloid mill or ball mill for 2 hours to make nail polish. Mix sodium carboxymethyl cellulose with 20 parts of water to make solution B. Mix polyacrylamide with 20 parts of hot water to make liquid acrylic. Then magnesia powder, pearl powder, mica powder, NH 4 BF 4 Put sulfur and sulfur into a colloid mill or ball mill, add liquid A, liquid B, liquid C, silica sol, and white latex to grind for 3 hours, and then add an appropriate amount of water to the mixer and stir for 1.5 hours to obtain the magnesium alloy lost foam Cast flame retardant coatings.
[0019] When in use, apply a 0.6mm-thick coating on the surface of...
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