CN103088335A - Surface modification and silanization treating agent for metal and preparation method thereof - Google Patents

Abstract

The invention discloses a surface modification and silanization treating agent for metal. The surface modification and silanization treating agent is prepared from the following ingredients in weight (gram) in every 500g of mixture liquid: 1-2g of sodium dihydrogen phosphate, 1-2g of ammonium molybdate, 1-2g of sodium dodecyl benzenesulfonate, 3-5g of rosin, 1-2g of trihydroxyethyl isocyanurate, 5-8g of maleic anhydride, 4-6g of diethylene glycol butyl ether, 5-8g of isobutanol, 3-5g of oxalic acid, 1-2g of urea, 7-10g of vinyl-tris(beta-methoxyethoxy ) silane and the balance of deionized water. According to the surface modification and silanization treating agent, rosin serving as a reaction raw material is polymerized with raw materials, such as maleic anhydride and silane, and then, a strong protecting film can be formed on the surface of metal; and the corrosion resistance of metallic matrixes is enhanced.

Description

A kind of metal surface modification silane finish and preparation method thereof

Technical field

The present invention relates to a kind of at metallic surface silanization treating agent and with its technique of processing at metallic surface silanization.

Background technology

Bonderizing is widely applied in coated metal pre-treatment, the industry such as lubricated, antirust.Particularly in the Coating Pretreatment industry, bonderizing is one of the most frequently used pretreatment process.Bonderizing is to form the process of biphosphate ammonium salt protective membrane after metal reacts in acid phosphatase ammonium dihydrogen salts solution on its surface.Phosphatize phosphate coat also has good oilness, insulativity and solidity to corrosion, thereby be widely used in the manufacturing field of the products such as automobile, machinofacture, aerospace and household electrical appliance.Phosphorization treatment process is take primary ammonium phosphate, zinc, manganese, nickel as main raw material, cause the serious environmental pollution such as heavy metal, phosphorus, nitrite, and all more or less can produce sediment and obnoxious flavour in treating processes, what impact was produced normally carries out, and the waste water COD of discharging and heavy metal will endanger environment as not carrying out environmental protection treatment; In addition, the most of need of bonderizing carried out under the condition of heating, and energy consumption is larger, complex process, and operation is also inconvenient.Existing the silane surface treatment technology occurred, but the silane surface treatment agent is unstable in the metallic surface film forming, antiseptic property is unstable, poor effect.

Summary of the invention

The purpose of this invention is to provide a kind of metal surface modification silane finish and preparation method thereof; this solution does not need to heat; not phosphorous, produce, do not contain heavy metal, energy-conservation, simple and convenient management without sediment, can form stronger protective membrane on the duralumin surface, anticorrosion ability is good.

Technical scheme of the present invention is as follows:

A kind of metal surface modification silane finish is characterized in that, is made by following component, and in every 500 gram mixed solutions, the weight (gram) of each component is:

SODIUM PHOSPHATE, MONOBASIC 1-2, ammonium molybdate 1-2, Sodium dodecylbenzene sulfonate 1-2, rosin 3-5, trihydroxyethyl isocyanuric ester 1-2, MALEIC ANHYDRIDE 5-8, Diethylene Glycol butyl ether 4-6, isopropylcarbinol 5-8, oxalic acid 3-5, urea 1-2, vinyl three ('beta '-methoxy oxyethyl group) silane 7-10, surplus are deionized water.

The preparation method of described metal surface silylation protection treating agent is characterized in that comprising the following steps:

(1), with rosin heating fusing, to 110-115 ℃, add Diethylene Glycol butyl ether, vinyl three ('beta '-methoxy oxyethyl group) silane, stirring reaction 35-50 minute;

(2), be warming up to 145-160 ℃, add trihydroxyethyl isocyanuric ester, MALEIC ANHYDRIDE, stirring reaction 40-50 minute;

(3), continue to be warming up to 190-205 ℃, add SODIUM PHOSPHATE, MONOBASIC, ammonium molybdate, Sodium dodecylbenzene sulfonate, stirring reaction 40-50 minute;

(4), be cooled to 80-90 ℃, add other material, stir, insulation reaction 1-2 hour, cooling after, transferring PH be neutrality.

Silane surface treatment agent of the present invention, first metallic matrix can directly be entered in treatment agent of the present invention after degreasing, washing and process, after processing, metal base surface can obtain one deck coating, then can wash or not wash down one technique-oven dry according to process requirements, can carry out the operations such as powder spraying after oven dry, processing parameter in treating processes is: working temperature: 25 ℃ of room temperatures, pure water are washed specific conductivity＜20 μ s/cm, the treatment time: 90-250 second.

Compared to the prior art the present invention has the following advantages:

(1) the present invention adopts rosin as reaction raw materials, with polymerizable raw materials such as MALEIC ANHYDRIDE, silane, can form in the metallic surface stronger protective membrane; Strengthened the corrosion resistance nature of metallic matrix.

(2) contain inhibiter in raw material, increase the anticorrosion ability of protective membrane.

(3), the protective film that forms is evenly fine and close, polarized current density is less.

(4) the protection thickness (＜150nm) be significantly less than traditional phosphating solutions film (10 ~ 15 μ m).

Embodiment

A kind of metal surface modification silane finish is made by following component, and in every 500 gram mixed solutions, the weight (gram) of each feed composition is:

SODIUM PHOSPHATE, MONOBASIC 2, ammonium molybdate 2, Sodium dodecylbenzene sulfonate 2, rosin 5, trihydroxyethyl isocyanuric ester 2, MALEIC ANHYDRIDE 8, Diethylene Glycol butyl ether 6, isopropylcarbinol 5, oxalic acid 3, urea 2, vinyl three ('beta '-methoxy oxyethyl group) silane 10, surplus are deionized water.

The preparation method of described metal surface silylation protection treating agent is characterized in that comprising the following steps:

(1), with rosin heating fusing, to 110-115 ℃, add Diethylene Glycol butyl ether, vinyl three ('beta '-methoxy oxyethyl group) silane, stirring reaction 35-50 minute;

(2), be warming up to 145-160 ℃, add trihydroxyethyl isocyanuric ester, MALEIC ANHYDRIDE, stirring reaction 40-50 minute;

(3), continue to be warming up to 190-205 ℃, add SODIUM PHOSPHATE, MONOBASIC, ammonium molybdate, Sodium dodecylbenzene sulfonate, stirring reaction 40-50 minute;

(4), be cooled to 80-90 ℃, add other material, stir, insulation reaction 1-2 hour, cooling after, transferring PH be neutrality.

First steel plate galvanized can directly be entered in treatment agent of the present invention after degreasing, washing and process, after processing, matrix surface can obtain one deck coating, then can wash or not wash down one technique-oven dry according to process requirements, can carry out the operations such as powder spraying after oven dry, processing parameter in treating processes is: working temperature: 25 ℃ of room temperatures, pure water is washed specific conductivity＜20 μ s/cm, the treatment time: 90-250 second.

Steel plate galvanized first adopts the alkali-free degreasing fluid to wash the removal oil stain, then puts into silane surface treatment agent of the present invention and process, and after oven dry, carries out immersion test, adopts the NaCl aqueous solution of 0.1M, observes the sample surfaces situation; Testing impedance carries out in 3.5 (wt) % NaCl aqueous solution.Red rust did not appear in 9 days in steel plate galvanized, and detecting coating and steel plate galvanized cohesive strength is 9.1Mpa, and ︱ Z ︳ 10mHz value is 6.7E7.

Claims (2)

1. a metal surface modification silane finish, is characterized in that, made by following component, and in every 500 gram mixed solutions, the weight (gram) of each component is:

SODIUM PHOSPHATE, MONOBASIC 1-2, ammonium molybdate 1-2, Sodium dodecylbenzene sulfonate 1-2, rosin 3-5, trihydroxyethyl isocyanuric ester 1-2, MALEIC ANHYDRIDE 5-8, Diethylene Glycol butyl ether 4-6, isopropylcarbinol 5-8, oxalic acid 3-5, urea 1-2, vinyl three ('beta '-methoxy oxyethyl group) silane 7-10, surplus are deionized water.

2. the preparation method of metal surface silylation protection treating agent according to claim 1 is characterized in that comprising the following steps:

(1), with rosin heating fusing, to 110-115 ℃, add Diethylene Glycol butyl ether, vinyl three ('beta '-methoxy oxyethyl group) silane, stirring reaction 35-50 minute;

(2), be warming up to 145-160 ℃, add trihydroxyethyl isocyanuric ester, MALEIC ANHYDRIDE, stirring reaction 40-50 minute;

(3), continue to be warming up to 190-205 ℃, add SODIUM PHOSPHATE, MONOBASIC, ammonium molybdate, Sodium dodecylbenzene sulfonate, stirring reaction 40-50 minute;

(4), be cooled to 80-90 ℃, add other material, stir, insulation reaction 1-2 hour, cooling after, transferring PH be neutrality.