CN1786093A - Expansion type fire retarding epoxide resin powder paint suitable for steel structure and its preparation method - Google Patents
Expansion type fire retarding epoxide resin powder paint suitable for steel structure and its preparation method Download PDFInfo
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Abstract
The present invention discloses an expanded type fire-resisting epoxy resin powder coating and its preparation method. Said coating is formed from (by wt%) 25-45% of epoxy resin base material, 5-15% of carbon-forming agent, 5-40% of foaming agent, 5-15% of carbon-forming catalyst, 2-10% of epoxy resin solidifying agent, 0.5-1.5% of solidification accelerating agent, 2-10% of pigment filler and 0.1-2% of leveling agent. Said invention also provides the concrete steps of its preparation method and its application range.
Description
Technical field
The present invention relates to a kind of anti-flaming dope and preparation method thereof, more particularly be meant, a kind of expansion type fire retarding epoxide resin powder paint of using on the steel construction and preparation method thereof that is applicable to.
Background technology
A distinguishing feature of modern building is to develop towards direction large-scale and attractive in appearance, especially modernized factory building, workshop, gymnasium, amusement hall etc., and its main supporting member mostly depends on strong yet portable steel.Yet steel can lose its supporting capacity (generally exposed steel 0.5h under 600 ℃ of conditions begins fusing) soon under the calcination of thermal-flame, in case this thing happens, will cause catastrophic effect to whole buildings.Be that workshop or gymnasium, amusement hall all are the fire-prone places.For this reason, these girder steels are taked effective protection, make it avoid being subjected to the direct calcination of pyritous, cave in the time, just seem very important for the fire-fighting fire fighting tries to gain time precious to one thereby delay it.On these load-bearing girder steels, brush frie retardant coating and be the easiest a kind of, economy and effective means.
With regard to the mechanism of preventing fires, frie retardant coating can be divided into expanded polystyrene veneer and non-expansion type two classes.The non-expansion type frie retardant coating leans on the high flame retardancy of self to reach the purpose of fire-retardant fireproof.If will reach good flameproof effect, just must be coated with very thickly, can increase the weight of carrier.And expanding fire-proof paint, its coating is met the fire expansion and is formed cellular charring layer, and flame heat regulating is isolated, and the heat that is transmitted on the ground greatly reduces, thereby delays the flame expansion.Expanding fire-proof paint generally is coated with thinlyyer, can not increase too many extra load to being coated with member, so the steel construction surface of very suitable load-bearing.
Powder coating has characteristics such as not containing solvent, minimizing environmental pollution, the saving energy and resource, shelf-stable, transportation and processing convenience, has good economic and social benefit, enjoys people to favor.Low Contamination Coatings is the same occupies consequence at whole coating circle with high solid coating, water-borne coatings and photo-cured coating etc.
Anti-flaming dope generally contains halogen containing flame-retardant, not environmental protection both at home and abroad at present; In addition, with regard to epoxide powder coating, the following problem of domestic ubiquity: curing speed is fast inadequately, coating planarization (paint flow levelling) is not so good, and " tangerine peel " arranged, and package stability is relatively poor, easily caking.
Summary of the invention
One of purpose of the present invention provides a kind of expansion type fire retarding epoxide resin powder paint that is applicable to that steel construction is used, the Resins, epoxy base-material that is adopted is by phosphate modified Resins, epoxy, in the Resins, epoxy base-material, add char-forming agent, whipping agent and char forming catalyst and improved the fire performance and the flame retardant properties of this coating effectively, won the time for fire-fighting fire fighting and transfer property simultaneously.
Another object of the present invention is to propose a kind of method for preparing expansion type fire retarding epoxide resin powder paint, this preparation method earlier mixes the modified epoxy base-material with flow agent, put into the ball mill coating of claying into power with solidifying agent, curing catalyst, char-forming agent, char forming catalyst, whipping agent and color stuffing again.This preparation method is simple, and is easy to operate, controlled.
The present invention is a kind of expansion type fire retarding epoxide resin powder paint that is applicable to steel construction, form by 25～45wt% Resins, epoxy base-material, 5～15wt% char-forming agent, 5～40wt% whipping agent, 5～15wt% char forming catalyst, 2～10wt% epoxy curing agent, 0.5～1.5wt% curing catalyst, 2～10wt% color stuffing and 0.1～2wt% flow agent, and the content sum of above-mentioned each composition is 100%.
Described Resins, epoxy base-material is to adopt phosphate modified bisphenol A epoxide resin, phenolic aldehyde-Resins, epoxy or cycloaliphatic epoxy resin;
Described char-forming agent is an organic polyhydroxy compound;
Described whipping agent is the combination of one or more materials of Dyhard RU 100, trimeric cyanamide, guanidine, ammonium polyphosphate or melamine phosphate material;
Described char forming catalyst is the combination of one or more materials of ammonium phosphate, urea phosphate, phosphoguanidine urea, ammonium polyphosphate, ammonium polyphosphate potassium, magnesium ammonium phosphate, melamine pyrophosphate or melamine phosphate material;
Described epoxy curing agent is 1,2,4-benzenetricarboxylic anhydride, benzophenone tetracarboxylic dianhydride, 1,2,4,5-pyromellitic acid dianhydride, 4,4, adipic dihydrazide, Dyhard RU 100, ring amidine SPI, cyanoguanidine derivative, 4,4 '-diaminodiphenyl-methane, dicyano hydrazine, 4,4 '-one or both combinations of diamino-diphenyl ether, Resorcinol-dimethylated propyl diethylenetriamine or two (3-aminophenyl) methyl oxidation phosphine material;
Described curing catalyst is an imdazole derivatives;
Described color stuffing is the combination of two or more material of light calcium carbonate, barium sulfate, mica, silica powder, talcum powder, wollastonite, aluminum oxide, aluminium hydroxide, titanium dioxide and zinc oxide material;
Described flow agent is the combination of one or more materials of the own ester of butyl polyacrylate, polyacrylic acid, polyacrylic acid monooctyl ester, polyisobutyl acrylate, polyacrylic acid dissident ester, the different monooctyl ester of polyacrylic acid, acrylate copolymer, polyvinyl acetal, PLA-1, CDS-55-1 cellaburate, Modaflow, Multiflow, BYK-Powder Flow 3, BYK-VP352P or polyvinyl butyral acetal material.
Described expansion type fire retarding epoxide resin powder paint adds glyoxal ethyline in its epoxy curing agent or the 3-Methylimidazole promotes epoxy resin cure.
A kind of preparation method who is applicable to the expansion type fire retarding epoxide resin powder paint of steel construction of the present invention, the following step is arranged: (A) system modified epoxy base-material, in the solvent of every 500ml, put into 50g～80g Resins, epoxy, 5g～10g phosphoric acid ester and hydrochloric acid 10ml～30ml, adopt back flow reaction 3～5h, in rotary evaporator, remove and desolvate, with product vacuum-drying 1～3h, be ground to 150～200 orders and make the modified epoxy base-material then; (B) taking by weighing modified epoxy base-material that an amount of flow agent and above-mentioned (A) make mixes under 100 ℃～130 ℃ conditions and makes premix; (C) premix that above-mentioned (B) made obtains 150～200 purpose powder coating with taking by weighing after an amount of solidifying agent, curing catalyst, char-forming agent, char forming catalyst, whipping agent and color stuffing put into ball mill and do to mix 10～15h through screening.
Embodiment
The present invention is described in further detail below in conjunction with embodiment.
The present invention is a kind of expansion type fire retarding epoxide resin powder paint that is applicable to steel construction, form by 25～45wt% Resins, epoxy base-material, 5～15wt% char-forming agent, 5～40wt% whipping agent, 5～15wt% char forming catalyst, 2～10wt% epoxy curing agent, 0.5～1.5wt% curing catalyst, 2～10wt% color stuffing and 0.1～2wt% flow agent, and the content sum of above-mentioned each composition is 100%.
In the present invention, the expansion type fire retarding epoxide resin powder paint that is applicable to steel construction that another is preferable is made up of 30～40wt% Resins, epoxy base-material, 5～10wt% char-forming agent, 15～35wt% whipping agent, 10～15wt% char forming catalyst, 2～4wt% epoxy curing agent, 0.5～1.5wt% curing catalyst, 2～5wt% color stuffing and 0.1～2wt% flow agent.
Be used for Resins, epoxy of the present invention and can be selected from the known Resins, epoxy that is usually used in preparing powder coating, for example bisphenol A epoxide resin, phenolic aldehyde-Resins, epoxy and cycloaliphatic epoxy resin.Be solid-state Resins, epoxy under the normal temperature and be preferred for the present invention.Also can be used being the Resins, epoxy that is in a liquid state under solid-state Resins, epoxy and the normal temperature under the normal temperature.Adopting phosphate modified bisphenol A epoxide resin, phenolic aldehyde-Resins, epoxy or cycloaliphatic epoxy resin to use in the present invention is the base-material of coating.
In order to improve the fire retardancy of Resins, epoxy self, reduce the application of fire retardant in intumescent coating of the present invention, preferably Resins, epoxy is carried out modification with phosphoric acid ester.Used phosphoric acid ester is selected from down the group material: dibutyl phosphate, di(2-ethylhexyl)phosphate isobutyl ester, di(2-ethylhexyl)phosphate pentyl ester, phosphoric acid dihexyl, di(2-ethylhexyl)phosphate dissident ester, di(2-ethylhexyl)phosphate heptyl ester, dioctylphosphoric acid ester and di (isooctyl) phosphate.Compare with unmodified Resins, epoxy, the Resins, epoxy after phosphate modified has reduced the second-order transition temperature (T of original Resins, epoxy on the one hand
g), improved levelling property and processibility; Improved the flame retardant resistance of Resins, epoxy on the other hand.The phosphoric acid ester that modification is used is preferably selected from phosphoric acid dihexyl, dioctylphosphoric acid ester and di (isooctyl) phosphate or its one or more combinations.
Epoxy curing agent can be selected from: high-melting-point aromatics or alicyclic multi-anhydride, for example Tetra Hydro Phthalic Anhydride (mp.100 ℃), Tetra hydro Phthalic anhydride (mp.128～130 ℃), 1,2,4-benzenetricarboxylic anhydride (mp.145 ℃), benzophenone tetracarboxylic dianhydride (mp.218～225 ℃) and 1,2,4,5-pyromellitic acid dianhydride (mp.265 ℃); Other solid-state solidifying agent, mphenylenediamine, 4 for example, 4 '-diaminodiphenylsulfone(DDS), adipic dihydrazide, Dyhard RU 100, ring amidine SPI (Anhui chemical research institute), cyanoguanidine derivative (for example HT-2844 of Ciba company), BF3 benzylamine, 4,4 '-diaminodiphenyl-methane, dicyano hydrazine, 4,4 '-diamino-diphenyl ether, Resorcinol-dimethylated propyl diethylenetriamine, two (3-aminophenyl) methyl oxidation phosphine or its one or more combinations.
For rapider, more effective epoxy resin cure that carries out, in the present invention, interpolation plays synergy with solidifying agent and promotes that the promotor of epoxy resin cure is imdazole derivatives, for example glyoxal ethyline, 3-Methylimidazole.
When coating runs into flame or high temperature, under the effect of catalyzer, char-forming agent dehydration carbonization and form carbonaceous layer.The validity of char-forming agent depend primarily on it carbon content and molecule in the quantity of hydroxyl.Carbon content decision charing rate in the char-forming agent, and hydroxy radical content decision its dehydration and expansion rate.Char-forming agent is optional from organic polyol, for example carbohydrate; Also can choose the non-carbohydrate of organic polyhydroxy compound, for example glucose, starch, Mierocrystalline cellulose, Sorbitol Powder, tetramethylolmethane, Dipentaerythritol and tripentaerythritol or its one or more combinations.
Char forming catalyst is the key ingredient of expanding fire-proof paint, the main effect of char forming catalyst is the thermolysis process that promotes and improve coating, promote to form nonflammable three-dimensional carbonaceous layer structure, the amount of the flammable tar that the minimizing thermolysis produces, aldehyde, ketone promotes to produce the generation that non-flammable gases reacts.Char forming catalyst can be selected from ammonium phosphate, primary ammonium phosphate, phosphoric acid oxygen two ammoniums, urea phosphate, phosphoguanidine urea, vulkacit H, ammonium polyphosphate, ammonium polyphosphate potassium, magnesium ammonium phosphate, melamine pyrophosphate and melamine phosphate.The preferred ammonium polyphosphate of char forming catalyst, ammonium polyphosphate potassium, magnesium ammonium phosphate, melamine pyrophosphate and melamine phosphate or its one or more combinations in the present invention.
When meeting fiery decomposes, whipping agent produces non-flammable gases, for example NH
3, H
2O, N
2, CO
2Deng, coating is expanded form spongiform carbonaceous layer.Whipping agent commonly used has Dyhard RU 100, trimeric cyanamide, clorafin, guanidine, glycine, urea, vulkacit H, ammonium polyphosphate and melamine phosphate etc.The preferred trimeric cyanamide of whipping agent, ammonium polyphosphate and melamine phosphate or its one or more combinations in the present invention.
The color stuffing that can be used for powder coating all can be used for the present invention.For example light calcium carbonate, barium sulfate, mica, silica powder, talcum powder, wollastonite, aluminum oxide, titanium dioxide, zinc oxide etc.Use the combination of above-mentioned two or more material in the present invention.In addition, the present invention especially uses zinc oxide to improve the cigarette ability that presses down of coating.
The flow agent that is used for powder coating all can be applicable to the present invention.Flow agent can be selected from: polyacrylic ester, acrylate copolymer, polyvinyl acetal, derivatived cellulose etc.For example PLA-1 (Changzhou painting research institute), CDS-55-1 cellaburate (Wuxi chemical research institute), Modaflow and Multiflow (U.S. Monsanto company), BYK-Powder Flow 3 and BYK-VP352P (German BYK company), polyvinyl butyral acetal or its one or more combinations.
The refractory temperature of expansion type fire retarding epoxide resin powder paint of the present invention reaches 800 ℃～1000 ℃, and fire resistance period reaches about 2h, has won for the fire-fighting fire fighting and has protected the expensive time, has also won for transfer property simultaneously and has protected the expensive time.
The present invention is a kind of preparation method who is applicable to the expansion type fire retarding epoxide resin powder paint of steel construction, it has the following step: (A) system modified epoxy base-material, in the solvent of every 500ml, put into 50g～80g Resins, epoxy, 5g～10g phosphoric acid ester and hydrochloric acid 10ml～30ml, adopt back flow reaction 3～5h, in rotary evaporator, remove and desolvate, with product vacuum-drying 1～3h, be ground to 150～200 orders and make the modified epoxy base-material then; (B) taking by weighing modified epoxy base-material that an amount of flow agent and above-mentioned (A) make mixes under 100 ℃～130 ℃ conditions and makes premix; (C) premix that above-mentioned (B) made obtains 150～200 purpose powder coating with taking by weighing after an amount of solidifying agent, curing catalyst, char-forming agent, char forming catalyst, whipping agent and color stuffing put into ball mill and do to mix 10～15h through screening.
Set forth the present invention in more detail by following embodiment, but those skilled in the art should understand that the various components that can change among the present invention do not depart from scope of the present invention with corresponding content.
Embodiment 1:
Coating composition: take by weighing in right amount according to selected materials in the table 1.
Preparation process is: (epoxy resin modification) adds amount of acetone as solvent in a 500ml three-necked flask that agitator, reflux condensing tube and thermometer be housed, add E-12 Resins, epoxy, di (isooctyl) phosphate and a small amount of hydrochloric acid in proportion as catalyzer, back flow reaction 3～5h, in rotary evaporator, remove and desolvate, with product vacuum-drying 2h, be ground to 200 orders and make the di (isooctyl) phosphate modified epoxy then.
(cured epoxy resin) with the above-mentioned di (isooctyl) phosphate modified epoxy that makes with the Dyhard RU 100 curing cross-linked after limiting oxygen index(LOI) (LOI) (with reference to ASTM/D 2863-91) be 29, T
gIt is 89 ℃.
(mixed coating) system 100Kg expansion type fire retarding epoxide resin powder paint, required CDS-55-1 cellaburate 1.5Kg and di (isooctyl) phosphate modified epoxy 35Kg, make premix after the mixing down at 110 ℃, put into ball mill with 3Kg solidifying agent, 0.5Kg curing catalyst, 15Kg char-forming agent, 15Kg char forming catalyst, 24Kg whipping agent, 6Kg color stuffing again and do mixed 12h, obtain 200 purpose powder coating after the screening.
The above-mentioned expansion type fire retarding epoxide resin powder paint that makes adopted electrostatic coating method to utilize spray gun to be sprayed onto to be preheating on 130 ℃～160 ℃ the steel the general 2.5～3cm of coating thickness.
Embodiment 2:
Coating composition: take by weighing in right amount according to selected materials in the table 1.
Preparation process is identical with embodiment 1.
Embodiment 3:
Coating composition: take by weighing in right amount according to selected materials in the table 1.
Preparation process is identical with embodiment 1.
Embodiment 4:
Coating composition: take by weighing in right amount according to selected materials in the table 1.
Preparation process is identical with embodiment 1.
Adopt the cell combustion method to test its performance and water tolerance the coating that makes in the foregoing description, wherein, carry out the cell combustion method with reference to GB/T15442.4-1995 and measure, water tolerance is measured with reference to GB/T1733-1993, the results are shown in following table 2.
The performance perameter of table 2 expansion type fire retarding epoxide resin powder paint
| The embodiment numbering | The cell burning | Water tolerance | Processing characteristics | Foaming effect | |
| Mass loss (g) | Char volume (cm 3) | ||||
| Embodiment 1 | 3.4 | 6.2 | Well | Well | Well |
| Embodiment 2 | 1.4 | 3.6 | Well | Well | Good |
| Embodiment 3 | 2.9 | 5.4 | Good | Well | Well |
| Embodiment 4 | 2.5 | 3.8 | Good | Fine | Fine |
Coating for embodiment 4, the hardness of having measured coating with reference to GB/T6739-1996 is 6H, measure adhesive force of coatings with reference to GB/T9286-1998 and reached one-level, measure the resistance to impact shock of the coating of embodiment 1～4 with reference to GB/T1732-1993, be respectively 5.2J, 5.5J, 5.2J and 5.4J.Carried out the salt-fog resistant test of the coating of embodiment 4 with reference to GB/T1771-1993, recorded more than the salt spray resistance 1000h.
Test the chemical-resistant of coating with reference to GB/T1763-1988, the results are shown in Table 3.
The coating chemical-resistant parameter of table 3 embodiment 4
| Chemical | Time (h) | Chemical | Time (h) |
| Hydrochloric acid (15%) sulfuric acid (10%) sodium hydroxide (10%) salt solution (3.5%) ammoniacal liquor (10%) | ＞100 ＞100 ＞100 ＞72 ＞120 | Nitric acid (15%) gasoline acetate (10%) tap water | ＞120 ＞120 ＞120 ＞150 |
Table 1 is the component of expansion type fire retarding epoxide resin powder paint:
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | |||||
| Component | Consumption | Component | Consumption | Component | Consumption | Component | Consumption | |
| The modified epoxy base-material | Dibutyl phosphate+phenolic aldehyde-Resins, epoxy | 35wt％ | Dibutyl phosphate+phenolic aldehyde-Resins, epoxy | 35wt％ | Dibutyl phosphate+phenolic aldehyde-Resins, epoxy | 35wt％ | Dibutyl phosphate+phenolic aldehyde-Resins, epoxy | 38wt％ |
| Char-forming agent | Tetramethylolmethane | 15wt％ | Tetramethylolmethane | 15wt％ | Dipentaerythritol | 15wt％ | Tetramethylolmethane | 15wt％ |
| Whipping agent | Trimeric cyanamide | 24wt％ | Melamine phosphate | 24wt％ | Trimeric cyanamide | 24wt％ | Melamine phosphate | 36wt％ |
| Char forming catalyst | Ammonium polyphosphate | 15wt％ | Ammonium polyphosphate | 15wt％ | Ammonium polyphosphate | 15wt％ | ||
| Epoxy curing agent | Dyhard RU 100 | 3wt％ | Dyhard RU 100 | 3wt％ | Dyhard RU 100 | 3wt％ | Dyhard RU 100 | 3wt％ |
| Curing catalyst | Glyoxal ethyline | 0.5wt％ | Glyoxal ethyline | 0.5wt％ | Glyoxal ethyline | 0.5wt％ | Glyoxal ethyline | 0.5wt％ |
| Color stuffing | Titanium dioxide zinc oxide talcum powder light calcium carbonate | 2wt％ 2wt％ 1wt％ 1wt％ | Titanium dioxide zinc oxide talcum powder light calcium carbonate | 2wt％ 2wt％ 1wt％ 1wt％ | Titanium dioxide zinc oxide talcum powder light calcium carbonate | 2wt％ 2wt％ 1wt％ 1wt％ | Titanium dioxide zinc oxide talcum powder light calcium carbonate | 2wt％ 2wt％ 1wt％ 1wt％ |
| Flow agent | The CDS-55-1 cellaburate | 1.5wt％ | The CDS-55-1 cellaburate | 1.5wt％ | The CDS-55-1 cellaburate | 1.5wt％ | The CDS-55-1 cellaburate | 1.5wt％ |
Claims (6)
1, a kind of expansion type fire retarding epoxide resin powder paint that is applicable to steel construction, it is characterized in that: form by 25～45wt% Resins, epoxy base-material, 5～15wt% char-forming agent, 5～40wt% whipping agent, 5～15wt% char forming catalyst, 2～10wt% epoxy curing agent, 0.5～1.5wt% curing catalyst, 2～10wt% color stuffing and 0.1～2wt% flow agent, and the content sum of above-mentioned each composition is 100%.
2, expansion type fire retarding epoxide resin powder paint according to claim 1, it is characterized in that: form by 30～40wt% Resins, epoxy base-material, 5～10wt% char-forming agent, 15～35wt% whipping agent, 10～15wt% char forming catalyst, 2～4wt% epoxy curing agent, 0.5～1.5wt% curing catalyst, 2～5wt% color stuffing and 0.1～2wt% flow agent, and the content sum of above-mentioned each composition is 100%.
3, expansion type fire retarding epoxide resin powder paint according to claim 1 and 2 is characterized in that: described Resins, epoxy base-material is to adopt phosphate modified bisphenol A epoxide resin, phenolic aldehyde-Resins, epoxy or cycloaliphatic epoxy resin;
Described char-forming agent is an organic polyhydroxy compound;
Described whipping agent is the combination of one or more materials of Dyhard RU 100, trimeric cyanamide, guanidine, ammonium polyphosphate or melamine phosphate material;
Described char forming catalyst is the combination of one or more materials of ammonium phosphate, urea phosphate, phosphoguanidine urea, ammonium polyphosphate, ammonium polyphosphate potassium, magnesium ammonium phosphate, melamine pyrophosphate or melamine phosphate material;
Described epoxy curing agent is 1,2,4-benzenetricarboxylic anhydride, benzophenone tetracarboxylic dianhydride, 1,2,4,5-pyromellitic acid dianhydride, 4,4, adipic dihydrazide, Dyhard RU 100, ring amidine SPI, cyanoguanidine derivative, 4,4 '-diaminodiphenyl-methane, dicyano hydrazine, 4,4 '-one or both combinations of diamino-diphenyl ether, Resorcinol-dimethylated propyl diethylenetriamine or two (3-aminophenyl) methyl oxidation phosphine material;
Described curing catalyst is an imdazole derivatives;
Described color stuffing is the combination of two or more material of light calcium carbonate, barium sulfate, mica, silica powder, talcum powder, wollastonite, aluminum oxide, aluminium hydroxide, titanium dioxide and zinc oxide material;
Described flow agent is the combination of one or more materials of the own ester of butyl polyacrylate, polyacrylic acid, polyacrylic acid monooctyl ester, polyisobutyl acrylate, polyacrylic acid dissident ester, the different monooctyl ester of polyacrylic acid, acrylate copolymer, polyvinyl acetal, PLA-1, CDS-55-1 cellaburate, Modaflow, Multiflow, BYK-Powder Flow 3, BYK-VP352P or polyvinyl butyral acetal material.
4, expansion type fire retarding epoxide resin powder paint according to claim 3 is characterized in that: described char-forming agent is tetramethylolmethane, Dipentaerythritol or the tripentaerythritol of the non-carbohydrate in glucose, starch, Mierocrystalline cellulose, Sorbitol Powder or the polyol of the carbohydrate in the polyol.
5, expansion type fire retarding epoxide resin powder paint according to claim 3 is characterized in that: interpolation glyoxal ethyline or 3-Methylimidazole promote epoxy resin cure in the described epoxy curing agent.
6, a kind of preparation method who is applicable to the expansion type fire retarding epoxide resin powder paint of steel construction, it is characterized in that the following step is arranged: (A) system modified epoxy base-material, in the solvent of every 500ml, put into 50g～80g Resins, epoxy, 5g～10g phosphoric acid ester and hydrochloric acid 10ml～30ml, adopt back flow reaction 3～5h, in rotary evaporator, remove and desolvate, with product vacuum-drying 1～3h, be ground to 150～200 orders and make the modified epoxy base-material then; (B) taking by weighing modified epoxy base-material that an amount of flow agent and above-mentioned (A) make mixes under 100 ℃～130 ℃ conditions and makes premix; (C) premix that above-mentioned (B) made obtains 150～200 purpose powder coating with taking by weighing after an amount of solidifying agent, curing catalyst, char-forming agent, char forming catalyst, whipping agent and color stuffing put into ball mill and do to mix 10～15h through screening.
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2005
- 2005-11-30 CN CN 200510126070 patent/CN1786093A/en active Pending
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