CN105647261A - Insulating fireproof coating for electric wires - Google Patents
Insulating fireproof coating for electric wires Download PDFInfo
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- CN105647261A CN105647261A CN201610128153.3A CN201610128153A CN105647261A CN 105647261 A CN105647261 A CN 105647261A CN 201610128153 A CN201610128153 A CN 201610128153A CN 105647261 A CN105647261 A CN 105647261A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C—CHEMISTRY; METALLURGY
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
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- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/60—Additives non-macromolecular
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
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Abstract
An insulating fireproof coating for electric wires comprises the following materials according to parts by weight: 30-35 parts of n-hexane diisocyanate, 25-28 parts of polytetrafluoroethylene emulsion, 10-13 parts of organosilicon-modified styrene-acrylic emulsion, 15-19 parts of modified melamine resin, 10-14 parts of acrylate-styrene-vinyl acetate terpolymer, 10-12 parts of styrene, 10-12 parts of ammonium polyphosphate, 5-10 parts of tetramethylolmethane, 6-9 parts of expansile graphite, 7-9 parts of hydroxyethyl cellulose, 3-5 parts of glycerol, 1-2 parts of silicon carbide powder, 5-8 parts of polyvinyl alcohol, 2-4 parts of aluminum hydroxide, 3-5 parts of poly(N-isopropylacrylamide) modified magnesium hydroxide, 0.5-1 part of titanium dioxide, and 40-60 parts of deionized water.
Description
Technical field
The present invention relates to technical field of coatings, be specifically related to a kind of electric wire insulation fire-retardant coating composition.
Background technology
So-called coating is to be coated in protected or decorated body surface; and the continuous film of firm attachment can be formed with coated article, it is common that based on resin or oil or emulsion, add or without pigment, filler; add corresponding additive, with the formulated thick liquid of organic solvent or water. Coating generally plays protection and the effect of decoration. Electric wire is to be seen everywhere in our daily life, is a part indispensable during we live. We would generally be coated with a coating at electric wire outer layer, plays a protective role, and possesses insulation fireproof performance. Meanwhile, we are also required to it and possess the superperformances such as high-low temperature resistant, anticorrosion antiwear, adhesive force is strong. The Chinese patent that publication No. is CN104946035A discloses a kind of electric wire insulation fireproof coating, the following raw material including according to mass fraction meter: aliphatic polyisocyante 40-50 part, ptfe emulsion 35-45 part, silicon powder 5-15 part, levelling agent 1.2-2 part, Tissuemat E 0.5-1 part, thickening agent 1-3 part, fire retardant 0.8-2 part, antioxidant 0.1-2 part, defoamer 0.5-1 part, dispersant 0.5-1.2 part, glycerol 10-20 part, water 15-30 part. Practical application finds, said wires insulation fireproof coating has certain improvement in performances such as high-low temperature resistant, anticorrosion antiwear, strong, the fire prevention of adhesive force, it is known that, electric wire major part is chronically in exposed environment, erosion by natural environment such as exposing to the sun and rain is even more serious, said wires insulation fireproof coating is still undesirable at aspect of performances such as fire resistance period, corrosion resistance, resistance to impact, resistance to sudden high fevers, it is necessary to improve further.
Summary of the invention
The present invention is directed to weak point of the prior art, it is provided that a kind of electric wire insulation fireproof coating.
The above-mentioned purpose of the present invention is realized by following technical proposals:
A kind of electric wire insulation fireproof coating, including the raw material of following parts by weight: normal hexane diisocyanate 30-35 part; Ptfe emulsion 25-28 part; Silicone modified styrene-acrylate emulsion 10-13 part; Modified melamine resin 15-19 part; Acrylate-styrene bipolymer-vinyl acetate terpolymer 10-14 part; Styrene 10-12 part; APP 10-12 part; 4 penta tetrol 5-10 parts; Expansile graphite 6-9 part;Hydroxyethyl cellulose 7-9 part; Glycerol 3-5 part; Silicon carbide powder 1-2 part; Polyvinyl alcohol 5-8 part; Aluminium hydroxide 2-4 part; NIPA modified magnesium hydroxide 3-5 part; Titanium dioxide 0.5-1 part; Deionized water 40-60 part.
Further, including the raw material of following parts by weight: normal hexane diisocyanate 30 parts; Ptfe emulsion 28 parts; Silicone modified styrene-acrylate emulsion 10 parts; Modified melamine resin 15 parts; Acrylate-styrene bipolymer-vinyl acetate terpolymer 14 parts; Styrene 10 parts; APP 12 parts; 4 penta tetrols 10 parts; Expansile graphite 6 parts; Hydroxyethyl cellulose 7 parts; Glycerol 5 parts; Silicon carbide powder 1.5 parts; Polyvinyl alcohol 8 parts; Aluminium hydroxide 2 parts; NIPA modified magnesium hydroxide 5 parts; Titanium dioxide 0.5 part; Deionized water 60 parts.
Further, including the raw material of following parts by weight: normal hexane diisocyanate 35 parts; Ptfe emulsion 26 parts; Silicone modified styrene-acrylate emulsion 13 parts; Modified melamine resin 19 parts; Acrylate-styrene bipolymer-vinyl acetate terpolymer 10 parts; Styrene 12 parts; APP 11 parts; 4 penta tetrols 10 parts; Expansile graphite 7 parts; Hydroxyethyl cellulose 8 parts; Glycerol 4 parts; Silicon carbide powder 1 part; Polyvinyl alcohol 6 parts; Aluminium hydroxide 3 parts; NIPA modified magnesium hydroxide 3 parts; Titanium dioxide 1 part; Deionized water 50 parts.
Further, including the raw material of following parts by weight: normal hexane diisocyanate 32 parts; Ptfe emulsion 25 parts; Silicone modified styrene-acrylate emulsion 11 parts; Modified melamine resin 17 parts; Acrylate-styrene bipolymer-vinyl acetate terpolymer 12 parts; Styrene 11 parts; APP 10 parts; 4 penta tetrols 5 parts; Expansile graphite 9 parts; Hydroxyethyl cellulose 9 parts; Glycerol 3 parts; Silicon carbide powder 2 parts; Polyvinyl alcohol 5 parts; Aluminium hydroxide 4 parts; NIPA modified magnesium hydroxide 4 parts; Titanium dioxide 1 part; Deionized water 40 parts.
Further, modified melamine resin is prepared according to following technique: pass into formaldehyde gas to NaOH solution A, regulate pH to 8.5-8.8, it is subsequently adding tripolycyanamide, it is warming up to 85-90 DEG C in 30-35min, temperature-rise period adds base catalyst and keeps pH to be 8.5-8.8, obtain material a, in material a, add polyglycol solution and poly-vinyl alcohol solution obtains material b, in material b, add furfuryl aldehyde solution obtain material c; Material c being cooled to 51-53 DEG C, drips methanol and produce white flock precipitate to material c in material c, add oxalic acid solution and maintain pH=5.0-5.2 in dropping process, then regulating pH with NaOH solution B is 7.8-8.0, obtains modified melamine resin.
Further, in Acrylate-styrene bipolymer-vinyl acetate terpolymer, by weight percentage, acrylate accounts for 55%, styrene accounts for 20%, and vinyl acetate accounts for 15%, and the weight average molecular weight of copolymer is 60000-80000, and having the hydroxyl value of 5mgKOH/g, mean diameter is 0.5-0.6 ��m.
Further, described silicone modified styrene-acrylate emulsion is prepared according to following technique: (1) by 25 parts of deionized waters, 10 parts of tert-butyl alcohols and 9 parts of isopropanol mix homogeneously, is warming up to 75-80 DEG C, obtains solution by weight; (2) in solution in step (1), 6 parts of styrene, 4 parts of Isooctyl acrylate monomers, 5 parts of silester, 7 parts of epoxy resin, 9 parts of organic silicon monomers and 5 parts of anionic ring-opening polymerization emulsions are added, mix homogeneously, then heat to 92 DEG C, be incubated 1.5h, obtain stand-by solution;(3) 2 parts of vinyl silicone oils, 5 parts of aerosils and 5 parts of dimethylformamides being added in step (2) stand-by solution, mix homogeneously obtains solution; (4) by step (3) gained solution warms to 70 DEG C, in 0.5h, drip 7 parts of potassium peroxydisulfates, be subsequently cooled to room temperature, obtain solution, reconcile pH to neutral with ammonia, obtain silicone modified styrene-acrylate emulsion.
Further, the mean diameter of expansile graphite is 22-28 ��m.
Further, the particle diameter of described NIPA modified magnesium hydroxide is 12-18 ��m.
The organic assembling of the material such as normal hexane diisocyanate, politef, silicone modified styrene-acrylate emulsion, Acrylate-styrene bipolymer-vinyl acetate terpolymer in the present invention, by regulating the weight of each composition, be effectively increased this electric wire insulation fireproof coating high temperature resistant/performance such as low temperature, resistance to acids and bases, resistance to impact, be suitable to popularization and application.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with embodiment, technical scheme is clearly and completely described. Obviously, described embodiment is the part of the present invention, rather than whole embodiments. Based on described embodiments of the invention, the every other embodiment that those of ordinary skill in the art obtain under the premise without creative work, broadly fall into the scope of protection of the invention.
Embodiment 1:
A kind of electric wire insulation fireproof coating, including the raw material of following parts by weight:
Normal hexane diisocyanate 30 parts;
Ptfe emulsion 28 parts;
Silicone modified styrene-acrylate emulsion 10 parts;
Modified melamine resin 15 parts;
Acrylate-styrene bipolymer-vinyl acetate terpolymer 14 parts;
Styrene 10 parts;
APP 12 parts;
4 penta tetrols 10 parts;
Expansile graphite 6 parts;
Hydroxyethyl cellulose 7 parts;
Glycerol 5 parts;
Silicon carbide powder 1.5 parts;
Polyvinyl alcohol 8 parts;
Aluminium hydroxide 2 parts;
NIPA modified magnesium hydroxide 5 parts;
Titanium dioxide 0.5 part;
Deionized water 60 parts.
Wherein modified melamine resin is prepared according to following technique: pass into formaldehyde gas to NaOH solution A, regulate pH to 8.5, it is subsequently adding tripolycyanamide, 90 DEG C it are warming up in 30min, adding base catalyst in temperature-rise period keeps pH to be 8.5, obtain material a, in material a, add polyglycol solution and poly-vinyl alcohol solution obtains material b, in material b, add furfuryl aldehyde solution obtain material c; Material c being cooled to 51 DEG C, drips methanol and produce white flock precipitate to material c in material c, add oxalic acid solution and maintain pH=5.0 in dropping process, then regulating pH with NaOH solution B is 7.8, obtains modified melamine resin. By introducing Polyethylene Glycol, polyvinyl alcohol, furfural, melamine resin is modified, substantially increases the stickiness of melamine resin, stability and mechanical strength.
Wherein in Acrylate-styrene bipolymer-vinyl acetate terpolymer, by weight percentage, acrylate accounts for 55%, styrene accounts for 20%, and vinyl acetate accounts for 15%, and the weight average molecular weight of copolymer is 60000, and having the hydroxyl value of 5mgKOH/g, mean diameter is 0.5-0.6 ��m. In the present invention, Acrylate-styrene bipolymer-vinyl acetate terpolymer is the water-base resin of a kind of environmental protection, and there is the anti-flammability of excellence, wherein acrylate is bulk composition, and itself and cinnamic combination can play dispersion well and stablize the stable system effect of the composition such as silicon carbide powder, titanium dioxide and improve the effects such as film compactness, anticorrosive property and resistance to water.
Described silicone modified styrene-acrylate emulsion is prepared according to following technique:
(1) by weight by 25 parts of deionized waters, 10 parts of tert-butyl alcohols and 9 parts of isopropanol mix homogeneously, it is warming up to 75 DEG C, obtains solution; (2) in solution in step (1), 6 parts of styrene, 4 parts of Isooctyl acrylate monomers, 5 parts of silester, 7 parts of epoxy resin, 9 parts of organic silicon monomers and 5 parts of anionic ring-opening polymerization emulsions are added, mix homogeneously, then heat to 92 DEG C, be incubated 1.5h, obtain stand-by solution; (3) 2 parts of vinyl silicone oils, 5 parts of aerosils and 5 parts of dimethylformamides being added in step (2) stand-by solution, mix homogeneously obtains solution; (4) by step (3) gained solution warms to 70 DEG C, in 0.5h, drip 7 parts of potassium peroxydisulfates, be subsequently cooled to room temperature, obtain solution, reconcile pH to neutral with ammonia, obtain silicone modified styrene-acrylate emulsion.
Owing to, in organic-silicon-modified process, the dissociation energy of the Si-O key constituting organo-silicon compound main chain is high, and structure is firm stable very, thus can be effectively improved the heat-resisting of coating through organic-silicon-modified styrene-acrylic emulsion, weather resistance.
In the present invention, expansile graphite can greatly improve the expansion multiplying power of system thus improving fire resistance, it is preferred that its mean diameter is 22-28 ��m.
The present invention have employed aluminium hydroxide, aluminium hydroxide can be decomposed reaction at 200 DEG C, generate aluminium oxide and water, and absorbing amount of heat, the steam of generation can effectively dilute imflammable gas and the oxygen of steel structure surface so that it is heats up slowly, slowed down the speed burnt, the pellumina being simultaneously generated covers charring layer surface, further starvation, plays an important role in fireproof coating.
Preferably, the particle diameter of described NIPA modified magnesium hydroxide is 12-18 ��m, and in described NIPA modified magnesium hydroxide, the molecular weight of modifying agent NIPA is 8000g/mol. The present invention utilize high molecular polymer NIPA magnesium hydroxide is modified, on the one hand, containing hydrophilic group in NIPA, to have an effect with the hydroxyl on magnesium hydroxide surface; On the other hand, the long-chain in high molecular polymer forms sterically hindered effect, reduces Strong oxdiative magnesium and reunites, and forms the particle that particle diameter is less. Modified magnesium hydroxide has better dispersibility and the compatibility, substantially increases the flame retardant effect of coating.
The electric wire of present invention insulation fireproof coating, is prepared in following manner:
(1) according to described parts by weight, normal hexane diisocyanate, modified melamine resin and deionized water being joined reactor, be sequentially added into ptfe emulsion, silicone modified styrene-acrylate emulsion under stirring, the speed of 100r/min stirs 40 minutes;
(2) then successively Acrylate-styrene bipolymer-vinyl acetate terpolymer, styrene, APP, 4 penta tetrols, hydroxyethyl cellulose, polyvinyl alcohol are put in reactor, reactor wherein keeps steady temperature 40 DEG C, mixing and stirring, mixing speed 300r/min, mixing time 40-60 minute;
(3) it is subsequently adding other raw material remaining, mixing speed 450r/min, is sufficiently stirred for 45 minutes, put into sand milling in sand mill, 30-40 minute time, obtain slurry, then filter with 300 order filter cloths;
(4) step (3) products therefrom is put in pill tank and stirred, mixing speed 100-120r/min, 30 minutes time, prepare fireproof coating product.
Embodiment 2:
A kind of electric wire insulation fireproof coating, including the raw material of following parts by weight:
Normal hexane diisocyanate 35 parts;
Ptfe emulsion 26 parts;
Silicone modified styrene-acrylate emulsion 13 parts;
Modified melamine resin 19 parts;
Acrylate-styrene bipolymer-vinyl acetate terpolymer 10 parts;
Styrene 12 parts;
APP 11 parts;
4 penta tetrols 10 parts;
Expansile graphite 7 parts;
Hydroxyethyl cellulose 8 parts;
Glycerol 4 parts;
Silicon carbide powder 1 part;
Polyvinyl alcohol 6 parts;
Aluminium hydroxide 3 parts;
NIPA modified magnesium hydroxide 3 parts;
Titanium dioxide 1 part;
Deionized water 50 parts.
Wherein modified melamine resin is prepared according to following technique: pass into formaldehyde gas to NaOH solution A, regulate pH to 8.8, it is subsequently adding tripolycyanamide, 90 DEG C it are warming up in 30min, adding base catalyst in temperature-rise period keeps pH to be 8.8, obtain material a, in material a, add polyglycol solution and poly-vinyl alcohol solution obtains material b, in material b, add furfuryl aldehyde solution obtain material c; Material c being cooled to 51 DEG C, drips methanol and produce white flock precipitate to material c in material c, add oxalic acid solution and maintain pH=5.0 in dropping process, then regulating pH with NaOH solution B is 7.8, obtains modified melamine resin.
Wherein in Acrylate-styrene bipolymer-vinyl acetate terpolymer, by weight percentage, acrylate accounts for 55%, styrene accounts for 20%, and vinyl acetate accounts for 15%, and the weight average molecular weight of copolymer is 80000, and having the hydroxyl value of 5mgKOH/g, mean diameter is 0.5-0.6 ��m.
Described silicone modified styrene-acrylate emulsion is prepared according to following technique:
(1) by weight by 25 parts of deionized waters, 10 parts of tert-butyl alcohols and 9 parts of isopropanol mix homogeneously, it is warming up to 80 DEG C, obtains solution; (2) in solution in step (1), 6 parts of styrene, 4 parts of Isooctyl acrylate monomers, 5 parts of silester, 7 parts of epoxy resin, 9 parts of organic silicon monomers and 5 parts of anionic ring-opening polymerization emulsions are added, mix homogeneously, then heat to 92 DEG C, be incubated 1.5h, obtain stand-by solution; (3) 2 parts of vinyl silicone oils, 5 parts of aerosils and 5 parts of dimethylformamides being added in step (2) stand-by solution, mix homogeneously obtains solution; (4) by step (3) gained solution warms to 70 DEG C, in 0.5h, drip 7 parts of potassium peroxydisulfates, be subsequently cooled to room temperature, obtain solution, reconcile pH to neutral with ammonia, obtain silicone modified styrene-acrylate emulsion.
Preferably, the particle diameter of described NIPA modified magnesium hydroxide is 12-18 ��m. Further, in described NIPA modified magnesium hydroxide, the molecular weight of modifying agent NIPA is 8000g/mol.
The electric wire of present invention insulation fireproof coating, is prepared in following manner:
(1) according to described parts by weight, normal hexane diisocyanate, modified melamine resin and deionized water being joined reactor, be sequentially added into ptfe emulsion, silicone modified styrene-acrylate emulsion under stirring, the speed of 150r/min stirs 45 minutes;
(2) then successively Acrylate-styrene bipolymer-vinyl acetate terpolymer, styrene, APP, 4 penta tetrols, hydroxyethyl cellulose, polyvinyl alcohol are put in reactor, reactor wherein keeps steady temperature 45 DEG C, mixing and stirring, mixing speed 300r/min, mixing time 60 minutes;
(3) it is subsequently adding other raw material remaining, mixing speed 450r/min, is sufficiently stirred for 45 minutes, put into sand milling in sand mill, 30-40 minute time, obtain slurry, then filter with 300 order filter cloths;
(4) step (3) products therefrom is put in pill tank and stirred, mixing speed 100-120r/min, 30 minutes time, prepare fireproof coating product.
Embodiment 3:
A kind of electric wire insulation fireproof coating, including the raw material of following parts by weight:
Normal hexane diisocyanate 32 parts;
Ptfe emulsion 25 parts;
Silicone modified styrene-acrylate emulsion 11 parts;
Modified melamine resin 17 parts;
Acrylate-styrene bipolymer-vinyl acetate terpolymer 12 parts;
Styrene 11 parts;
APP 10 parts;
4 penta tetrols 5 parts;
Expansile graphite 9 parts;
Hydroxyethyl cellulose 9 parts;
Glycerol 3 parts;
Silicon carbide powder 2 parts;
Polyvinyl alcohol 5 parts;
Aluminium hydroxide 4 parts;
NIPA modified magnesium hydroxide 4 parts;
Titanium dioxide 1 part;
Deionized water 40 parts.
Wherein modified melamine resin is prepared according to following technique: pass into formaldehyde gas to NaOH solution A, regulate pH to 8.7, it is subsequently adding tripolycyanamide, 88 DEG C it are warming up in 35min, adding base catalyst in temperature-rise period keeps pH to be 8.7, obtain material a, in material a, add polyglycol solution and poly-vinyl alcohol solution obtains material b, in material b, add furfuryl aldehyde solution obtain material c; Material c being cooled to 52 DEG C, drips methanol and produce white flock precipitate to material c in material c, add oxalic acid solution and maintain pH=5.1 in dropping process, then regulating pH with NaOH solution B is 8.0, obtains modified melamine resin.
Wherein in Acrylate-styrene bipolymer-vinyl acetate terpolymer, by weight percentage, acrylate accounts for 55%, styrene accounts for 20%, and vinyl acetate accounts for 15%, and the weight average molecular weight of copolymer is 80000, and having the hydroxyl value of 5mgKOH/g, mean diameter is 0.5-0.6 ��m.
Described silicone modified styrene-acrylate emulsion is prepared according to following technique:
(1) by weight by 25 parts of deionized waters, 10 parts of tert-butyl alcohols and 9 parts of isopropanol mix homogeneously, it is warming up to 78 DEG C, obtains solution; (2) in solution in step (1), 6 parts of styrene, 4 parts of Isooctyl acrylate monomers, 5 parts of silester, 7 parts of epoxy resin, 9 parts of organic silicon monomers and 5 parts of anionic ring-opening polymerization emulsions are added, mix homogeneously, then heat to 92 DEG C, be incubated 1.5h, obtain stand-by solution; (3) 2 parts of vinyl silicone oils, 5 parts of aerosils and 5 parts of dimethylformamides being added in step (2) stand-by solution, mix homogeneously obtains solution; (4) by step (3) gained solution warms to 70 DEG C, in 0.5h, drip 7 parts of potassium peroxydisulfates, be subsequently cooled to room temperature, obtain solution, reconcile pH to neutral with ammonia, obtain silicone modified styrene-acrylate emulsion.
In the present embodiment, expansile graphite can greatly improve the expansion multiplying power of system thus improving fire resistance, it is preferred that its mean diameter is 22-28 ��m.
Preferably, the particle diameter of described NIPA modified magnesium hydroxide is 12-18 ��m. Further, in described NIPA modified magnesium hydroxide, the molecular weight of modifying agent NIPA is 8000g/mol.
The electric wire of present invention insulation fireproof coating, is prepared in following manner:
(1) according to described parts by weight, normal hexane diisocyanate, modified melamine resin and deionized water being joined reactor, be sequentially added into ptfe emulsion, silicone modified styrene-acrylate emulsion under stirring, the speed of 150r/min stirs 45 minutes;
(2) then successively Acrylate-styrene bipolymer-vinyl acetate terpolymer, styrene, APP, 4 penta tetrols, hydroxyethyl cellulose, polyvinyl alcohol are put in reactor, reactor wherein keeps steady temperature 45 DEG C, mixing and stirring, mixing speed 300r/min, mixing time 60 minutes;
(3) it is subsequently adding other raw material remaining, mixing speed 450r/min, is sufficiently stirred for 45 minutes, put into sand milling in sand mill, 30 minutes time, obtain slurry, then filter with 300 order filter cloths;
(4) step (3) products therefrom is put in pill tank and stirred, mixing speed 100r/min, 30 minutes time, prepare fireproof coating product.
Comparative example 1:
A kind of electric wire insulation fireproof coating that Suzhou company produces, the following raw material including according to mass fraction meter: aliphatic polyisocyante 40 parts, ptfe emulsion 35 parts, silicon powder 5 parts, levelling agent 1.2 parts, Tissuemat E 0.5 part, thickening agent 1 part, fire retardant 0.8 part, 0.1 part of antioxidant, defoamer 0.5 part, dispersant 0.5 part, glycerol 10 parts, 15 parts of water. Wherein, described aliphatic polyisocyante is normal hexane diisocyanate; Described defoamer is polyoxyethylene polyoxypropylene tetramethylolmethane ether or emulsified silicone oil; Described fire retardant is TDE.
This electric wire preparation method of insulation fireproof coating, comprises the following steps: according to quality proportioning, and with rotating speed 220r/min, each component is stirred 50min in high-speed mixer, obtains described electric wire insulation fireproof coating.
The electric wire insulation fireproof coating that embodiment of the present invention 1-3 and comparative example 1 are prepared carries out the test of performance, and result is in Table 1:
Test result from table 1, the electric wire insulation fireproof coating of the present invention is all improved significantly than existing fireproof coating at aspect of performances such as high temperature resistant/low temperature, resistance to acids and bases, resistances to impact, improve the combination property of existing electric wire insulation fireproof coating, be suitable to popularization and application.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit; Although the present invention being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent replacement; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (9)
1. an electric wire insulation fireproof coating, it is characterised in that include the raw material of following parts by weight: normal hexane diisocyanate 30-35 part; Ptfe emulsion 25-28 part; Silicone modified styrene-acrylate emulsion 10-13 part; Modified melamine resin 15-19 part; Acrylate-styrene bipolymer-vinyl acetate terpolymer 10-14 part; Styrene 10-12 part; APP 10-12 part; 4 penta tetrol 5-10 parts; Expansile graphite 6-9 part; Hydroxyethyl cellulose 7-9 part; Glycerol 3-5 part; Silicon carbide powder 1-2 part; Polyvinyl alcohol 5-8 part; Aluminium hydroxide 2-4 part; NIPA modified magnesium hydroxide 3-5 part; Titanium dioxide 0.5-1 part; Deionized water 40-60 part.
2. electric wire according to claim 1 insulation fireproof coating, it is characterised in that include the raw material of following parts by weight: normal hexane diisocyanate 30 parts; Ptfe emulsion 28 parts;Silicone modified styrene-acrylate emulsion 10 parts; Modified melamine resin 15 parts; Acrylate-styrene bipolymer-vinyl acetate terpolymer 14 parts; Styrene 10 parts; APP 12 parts; 4 penta tetrols 10 parts; Expansile graphite 6 parts; Hydroxyethyl cellulose 7 parts; Glycerol 5 parts; Silicon carbide powder 1.5 parts; Polyvinyl alcohol 8 parts; Aluminium hydroxide 2 parts; NIPA modified magnesium hydroxide 5 parts; Titanium dioxide 0.5 part; Deionized water 60 parts.
3. electric wire according to claim 1 insulation fireproof coating, it is characterised in that include the raw material of following parts by weight: normal hexane diisocyanate 35 parts; Ptfe emulsion 26 parts; Silicone modified styrene-acrylate emulsion 13 parts; Modified melamine resin 19 parts; Acrylate-styrene bipolymer-vinyl acetate terpolymer 10 parts; Styrene 12 parts; APP 11 parts; 4 penta tetrols 10 parts; Expansile graphite 7 parts; Hydroxyethyl cellulose 8 parts; Glycerol 4 parts; Silicon carbide powder 1 part; Polyvinyl alcohol 6 parts; Aluminium hydroxide 3 parts; NIPA modified magnesium hydroxide 3 parts; Titanium dioxide 1 part; Deionized water 50 parts.
4. electric wire according to claim 1 insulation fireproof coating, it is characterised in that include the raw material of following parts by weight: normal hexane diisocyanate 32 parts; Ptfe emulsion 25 parts; Silicone modified styrene-acrylate emulsion 11 parts; Modified melamine resin 17 parts; Acrylate-styrene bipolymer-vinyl acetate terpolymer 12 parts; Styrene 11 parts; APP 10 parts; 4 penta tetrols 5 parts; Expansile graphite 9 parts; Hydroxyethyl cellulose 9 parts; Glycerol 3 parts; Silicon carbide powder 2 parts; Polyvinyl alcohol 5 parts; Aluminium hydroxide 4 parts; NIPA modified magnesium hydroxide 4 parts; Titanium dioxide 1 part; Deionized water 40 parts.
5. according to the arbitrary described electric wire insulation fireproof coating of claim 1-4, it is characterized in that: modified melamine resin is prepared according to following technique: pass into formaldehyde gas to NaOH solution A, regulate pH to 8.5-8.8, it is subsequently adding tripolycyanamide, 85-90 DEG C it is warming up in 30-35min, adding base catalyst in temperature-rise period keeps pH to be 8.5-8.8, obtain material a, in material a, add polyglycol solution and poly-vinyl alcohol solution obtains material b, in material b, add furfuryl aldehyde solution obtain material c; Material c being cooled to 51-53 DEG C, drips methanol and produce white flock precipitate to material c in material c, add oxalic acid solution and maintain pH=5.0-5.2 in dropping process, then regulating pH with NaOH solution B is 7.8-8.0, obtains modified melamine resin.
6. electric wire according to claim 1 insulation fireproof coating, it is characterized in that: in Acrylate-styrene bipolymer-vinyl acetate terpolymer, by weight percentage, acrylate accounts for 55%, styrene accounts for 20%, and vinyl acetate accounts for 15%, and the weight average molecular weight of copolymer is 60000-80000, and having the hydroxyl value of 5mgKOH/g, mean diameter is 0.5-0.6 ��m.
7. electric wire according to claim 1 insulation fireproof coating, it is characterized in that: described silicone modified styrene-acrylate emulsion is prepared according to following technique: (1) is by weight by 25 parts of deionized waters, 10 parts of tert-butyl alcohols and 9 parts of isopropanol mix homogeneously, it is warming up to 75-80 DEG C, obtains solution; (2) in solution in step (1), 6 parts of styrene, 4 parts of Isooctyl acrylate monomers, 5 parts of silester, 7 parts of epoxy resin, 9 parts of organic silicon monomers and 5 parts of anionic ring-opening polymerization emulsions are added, mix homogeneously, then heat to 92 DEG C, be incubated 1.5h, obtain stand-by solution;(3) 2 parts of vinyl silicone oils, 5 parts of aerosils and 5 parts of dimethylformamides being added in step (2) stand-by solution, mix homogeneously obtains solution; (4) by step (3) gained solution warms to 70 DEG C, in 0.5h, drip 7 parts of potassium peroxydisulfates, be subsequently cooled to room temperature, obtain solution, reconcile pH to neutral with ammonia, obtain silicone modified styrene-acrylate emulsion.
8. electric wire according to claim 1 insulation fireproof coating, it is characterised in that: the mean diameter of expansile graphite is 22-28 ��m.
9. electric wire according to claim 1 insulation fireproof coating, it is characterised in that: the particle diameter of described NIPA modified magnesium hydroxide is 12-18 ��m.
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| CN201610128153.3A CN105647261A (en) | 2016-03-08 | 2016-03-08 | Insulating fireproof coating for electric wires |
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