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Automobile aluminium wheel hub powdery paint suitable for bonding counterbalances and preparation method thereof

A technology of powder coating and balance weight, applied in powder coatings, polyester coatings, epoxy resin coatings, etc., can solve the problems of easy falling off of balance weights, and achieve the effects of not falling off easily, enhancing adhesion and improving adhesion performance.

Inactive Publication Date: 2013-01-30
GUANGZHOU QINGTIAN INDAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the present invention is to provide a kind of automobile aluminum wheel hub powder coating suitable for the bonding of balance weights. The coating formed by the coating on the aluminum hub of automobiles with large heat capacity has a good air permeability effect, and has excellent balance weight sticking performance. Can effectively solve the problem that the balance block is easy to fall off

Method used

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  • Automobile aluminium wheel hub powdery paint suitable for bonding counterbalances and preparation method thereof
  • Automobile aluminium wheel hub powdery paint suitable for bonding counterbalances and preparation method thereof
  • Automobile aluminium wheel hub powdery paint suitable for bonding counterbalances and preparation method thereof

Examples

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Effect test

Embodiment 1

[0048] Present embodiment adopts the saturated carboxyl polyester resin that resin adopts acid value 30~35mgKOH / g, and its preparation method is as follows:

[0049] 1) In the reactor, add 13Kg of neopentyl glycol, 0.5kg of trimethylolpropane, 1kg of 1,4-cyclohexanedimethanol and 3kg of water, and heat to melt;

[0050] 2) Add 27kg of terephthalic acid, 10.5kg of isophthalic acid, 0.6kg of adipic acid and 0.1kg of dibutyltin oxide in sequence, and continue to heat up to 130°C with nitrogen;

[0051] 3) The temperature is heated from 130°C to 250°C until the acid value reaches 13mgKOH / g, and the first time vacuumizes for polycondensation reaction. When the acid value reaches 4mgKOH / g, the softening point is 100°C and the melt viscosity at 200°C is 3000mpa.s, Add 0.05kg of acidolysis agent isophthalic acid to carry out acidolysis reaction. When the acid value reaches 40mgKOH / g, vacuumize for the second time to carry out acidolysis reaction until the acid value of the reaction prod...

Embodiment 2

[0061] The polyester resin of the present embodiment adopts the 30~35KOH / kg saturated carboxyl polyester resin of the embodiment 1.

[0062] The powder coating for automotive aluminum wheels suitable for bonding of balance weights, its components and weight ratio are as follows:

[0063]

[0064] Preparation:

[0065] (1) Weigh saturated carboxyl polyester resin with an acid value of 30-35KOH / kg, epoxy resin with an epoxy equivalent of 600-750g / ep, cyclic amidine and multi-acid matting curing agent, titanium dioxide, barium sulfate, Leveling agent, benzoin, amino-modified phenol urea compound and pigment are placed in the mixing tank, fully mixed and crushed for 1-10 minutes;

[0066] (2) The pre-mixed material enters the twin-screw extruder for extrusion; the heating temperature of the extruder is controlled at 80-120°C;

[0067] (3) The extruded material is compressed into tablets, cooled, and pulverized into a powder with a particle size (equivalent particle size D50) ...

Embodiment 3

[0071] Present embodiment adopts the saturated carboxyl polyester resin that resin adopts acid value 30~60mgKOH / g, and its preparation method is as follows:

[0072] 1) In the reaction kettle, add 14kg of neopentyl glycol, 1.0kg of trimethylolpropane, 2.0kg of 1,4-cyclohexanedimethanol and 4.0 of water, and heat to melt;

[0073] 2) Add 30kg of terephthalic acid, 12kg of isophthalic acid, 1.0kg of adipic acid and 0.5kg of dibutyltin oxide in sequence, and continue to heat up to 130°C with nitrogen;

[0074] 3) The temperature is heated from 130°C to 250°C until the acid value reaches 15mgKOH / g, and the first time vacuumizes for polycondensation reaction. When the acid value reaches 5mgKOH / g, the softening point is 103°C and the melt viscosity at 200°C is 3200mpa.s, Add 0.5 kg of acidolysis agent isophthalic acid to carry out acidolysis reaction. When the acid value reaches 42 mgKOH / g, the second vacuum acidolysis reaction is carried out until the acid value of the reaction pro...

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Abstract

The invention discloses an automobile aluminium wheel hub powdery paint suitable for bonding counterbalances, mainly comprising polyester resin, epoxy resin and surfactant. The paint disclosed herein forms a coating which has good ventilation effect on the automobile aluminium wheel hub with large thermal capacity, excellent performance of bonding counterbalances, and can effectively solve the problem that counterbalances are easily detached. The invention further discloses a preparation method of the powdery paint.

Description

technical field [0001] The invention relates to a powder coating, in particular to an automobile aluminum wheel hub powder coating which is suitable for the bonding of balance weights, and also relates to a preparation method of the powder coating. Background technique [0002] With the rapid development of powder coatings in recent years, more and more powder coatings are used on the exterior of aluminum wheels. Because the appearance of the wheel hub has become the most important criterion to measure the appearance of the car besides the car body, in recent years, some important mid-to-high-end brand cars have paid more and more attention to improving the appearance of the car wheel hub, and the installation method of the balance weight has been changed from the clamp type to the It is sticky type, but the wheel hub company reported that the wheel base powder of the powder coating supplier has the problem of low adhesion of the balance weight to varying degrees, and the ba...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D167/02C09D5/03C09D7/12
Inventor 高庆福李光王景宏程里程雷
Owner GUANGZHOU QINGTIAN INDAL
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