CN103305103A

CN103305103A - Pure polyester powder coating with good storage stability and preparation method thereof

Info

Publication number: CN103305103A
Application number: CN2013102407198A
Authority: CN
Inventors: 潘建良
Original assignee: Jiangsu Huaguang Powder Co Ltd
Current assignee: Jiangsu Huaguang Powder Co Ltd
Priority date: 2013-06-18
Filing date: 2013-06-18
Publication date: 2013-09-18

Abstract

The invention relates to a pure polyester powder coating with good storage stability and a preparation method thereof. The powder coating is prepared from the following components by weight percent: 52-64% of saturated carboxyl polyester, 4-5% of curing agent, 15-20% of pigment, 0.7-1.4% of flatting agent, 0.1-0.4% of benzoin, 15-20% of barium sulfate, and 0.4-1% of bulking agent. A specific powder bulking agent and an anticaking agent are added to the formula disclosed by the invention; the storage performance of the obtained powder coating product can achieve the first level. Thus, the product of a production enterprise of the powder coating is more convenient to produce and store, and is suitable for large-scale popularization and application.

Description

Pure polyester type powder paint that a kind of stability in storage is good and preparation method thereof

Technical field

The present invention relates to the powder coating preparing technical field, particularly pure polyester type powder paint that a kind of stability in storage is good and preparation method thereof.

Background technology

Powder coating is widely used in the external coating of various metalworks with the high-performance of its environmental protection and economy.Along with the development of economic society, people are more and more deep to the concept of environmental protection, and the range of application of powder coating is also increasing.Common powder coating exists meets the easily problem of caking of high temperature, and especially during the broiling summer, the agglomeration problems of powder coating is particularly serious, and this gives transportation and uses the more problem of bringing.

Summary of the invention

Technical problem to be solved by this invention is: a kind of stability in storage pure polyester type powder paint and preparation method thereof preferably is provided.

The technical solution adopted for the present invention to solve the technical problems is: the pure polyester type powder paint that a kind of stability in storage is good is characterized in that: component and the weight percent of this powder coating are as follows: saturated carboxyl polyester: 52-64%; Solidifying agent: 4-5%; Colorant: 15-20%; Flow agent: 0.7-1.4%; St-yrax: 0.1-0.4%; Barium sulfate: 15-20%; Raising agent: 0.4-1%.

The preferred content per-cent of this each component of powder coating is as follows: saturated carboxyl polyester: 55.9%; Solidifying agent: 4.2%; Colorant: 18%; Flow agent: 1%; St-yrax: 0.4%; Barium sulfate: 20%; Raising agent: 0.5%.

Described saturated carboxyl polyester is the P6045 saturated carboxyl polyester; Solidifying agent is triglycidyl isocyanurate (TGIC); Flow agent is the agent of vinylformic acid levelling; St-yrax is bitter almond oil camphor or bitter almond oil camphor, can eliminate in the powder coating preparation process and spraying process in the pin hole and the bubble that produce, raising agent is aluminium sesquioxide.

The preparation method of the pure polyester type powder paint that a kind of stability in storage is good, this preparation method comprises the steps:

A. according to weight percent with saturated carboxyl polyester: 52-64%; Solidifying agent: 4-5%; Colorant: 15-20%; Flow agent: 0.7-1.4%; St-yrax: 0.1-0.4%; Barium sulfate: 15-20%; Raising agent: 0.4-1%; Prepare in proportion and put into the full and uniform mixing of high-speed mixing agitator 10-12min;

B. get the material that mixes among the step a and add fully fusion and mixing in the screw extrusion press, extrude then, compressing tablet, pulverize finished product.

Beneficial effect: added specific aluminium sesquioxide powder raising agent in the prescription of the present invention; the storability of gained powder coating product reaches one-level; it is convenient that this makes that the production of product of powder coating manufacturing enterprise stores, and is suitable for large-scale promotion and uses.

Embodiment

Embodiment one

The pure polyester type powder paint that a kind of stability in storage is good is characterized in that: component and the weight percent of this powder coating are as follows: saturated carboxyl polyester: 55.9; Solidifying agent: 4.2; Colorant: 18; Flow agent: 1; St-yrax: 0.4; Barium sulfate: 20; Raising agent: 0.5; The preparation method of the pure polyester type powder paint that described stability in storage is good, this preparation method comprises the steps:

A. according to weight percent with saturated carboxyl polyester; Solidifying agent; Colorant; Flow agent; St-yrax; Barium sulfate and raising agent prepare in proportion and put into the full and uniform mixing of high-speed mixing agitator 10-12min;

Embodiment two

The pure polyester type powder paint that a kind of stability in storage is good is characterized in that: component and the weight percent of this powder coating are as follows: saturated carboxyl polyester: 58.7; Solidifying agent: 4.4; Colorant: 18; Flow agent: 1; St-yrax: 0.4; Barium sulfate: 16.8; Raising agent: 0.7; The preparation method of the pure polyester type powder paint that described stability in storage is good is with embodiment one.

Embodiment three

The pure polyester type powder paint that a kind of stability in storage is good is characterized in that: component and the weight percent of this powder coating are as follows: saturated carboxyl polyester: 63; Solidifying agent: 4.6; Colorant: 18; Flow agent: 1; St-yrax: 0.4; Barium sulfate: 12; Raising agent: 1; The preparation method of the pure polyester type powder paint that described stability in storage is good is with embodiment one.

The various embodiments described above gained epoxy powder product is sprayed on the material of construction, and condition of cure is 200 ℃/10min, and test result is as follows: after testing: this powder coating D50 particle diameter is 38-42 μ m; The shock resistance of filming after the curing (GB/T1732-1993): 50cm is just recoiling and is passing through; Thermotolerance: 150 ℃, the colourless change of the 35h no loss of gloss of baking; Salt-fog test 500h(GB/T1771-1991): do not have foaming, nothing cracking and nothing and peel off phenomenon; Sticking power (the 1mm cross-hatching, GB/T9286-1998): 0 grade; Pencil hardness (GB/T6739-1996): 3H, storage test: 40 ℃, 15-18 days.

Claims

1. pure polyester type powder paint that stability in storage is good, it is characterized in that: component and the weight percent of this powder coating are as follows: saturated carboxyl polyester: 52-64%; Solidifying agent: 4-5%; Colorant: 15-20%; Flow agent: 0.7-1.4%; St-yrax: 0.1-0.4%; Barium sulfate: 15-20%; Raising agent: 0.4-1%; Described raising agent is aluminium sesquioxide.

2. the good pure polyester type powder paint of stability in storage according to claim 1, it is characterized in that: the preferred content per-cent of this each component of powder coating is as follows: saturated carboxyl polyester: 55.9%; Solidifying agent: 4.2%; Colorant: 18%; Flow agent: 1%; St-yrax: 0.4%; Barium sulfate: 20%; Raising agent: 0.5%.

3. the good pure polyester type powder paint of stability in storage according to claim 1, it is characterized in that: described saturated carboxyl polyester is the P6045 saturated carboxyl polyester; Solidifying agent is triglycidyl isocyanurate (TGIC); Flow agent is the agent of vinylformic acid levelling; St-yrax is bitter almond oil camphor or bitter almond oil camphor.

4. the preparation method of the pure polyester type powder paint that a stability in storage is good, it is characterized in that: this preparation method comprises the steps: