Preparation method of high-performance fluorocarbon coating

A fluorocarbon coating and high-performance technology, applied in the field of preparation of fluorocarbon coatings, can solve the problems of low strength, cracking of the coating, complicated production process, etc., and achieve good low temperature flexibility, hydrolysis resistance, and excellent weather resistance. With the effect of corrosion resistance, simple preparation process

Active Publication Date: 2016-04-20
HANGZHOU FIRST APPLIED MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Patent CN102664204A provides a new type of coated solar cell backsheet, the wear resistance of which is improved by adding epoxy resin to the fluorocarbon coating, and the good compatibility of epoxy resin and fluororesin makes the coating resistant The abrasiveness is greatly improved, but because their molecular chains are combined by physical force, the strength is not large, and the addition of epoxy resin causes serious yellowing of the coating; patent CN101792639A discloses a wear-resistant, scratch-resistant and weather-resistant polyurethane coating. It is mainly made of hydroxyester acrylic resin, fluorocarbon resin and polyester resin as the main resin, filled with various nano-inorganic fillers, and then reacted with polyisocyanate curing agent. It is suitable for surface coating of high-speed trains, buses, etc. Among them,

Method used

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  • Preparation method of high-performance fluorocarbon coating
  • Preparation method of high-performance fluorocarbon coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A high-performance fluorocarbon coating, composed of two components, A and B.

[0026] Preparation of component A: Add 1000g (3.04molOH group) polytetrahydrofuran ether-oxypropylene copolymer glycol (Shanghai Yiqing Trading Co., Ltd.) at 150°C, and add 15g of hindered phenolic antioxidant 1076 (Dongguan City Huiyi Chemical Materials Co., Ltd.), add 5g p-toluenesulfonic acid (McLean’s reagent) for dehydration for 2.5 hours; then the reaction temperature drops to 95°C, and 2932g (9.12mol NCO-based Group) hexamethylene diisocyanate trimer solidifying agent HT-90BS (Wanhua Chemical Group Co., Ltd.), 2932g anhydrous butyl acetate (Zhejiang Chemical Industry Company) join in the reactor successively, insulation reaction 8 hours, then Vacuum was maintained for 1 hour to prepare isocyanate-terminated polytetrahydrofuran ether-propylene oxide copolymer prepolymer to obtain component A, which was sealed after cooling down for later use;

[0027] Preparation of Component B:

[0...

Embodiment 2

[0031]Preparation of component A: Add 1000g (9.6molOH group) polycaprolactone polyol PCL303 (Dacel, Japan) at 100°C, and add 5g of hindered phenolic antioxidant 1076 (Dongguan Huiyi Chemical Materials Co., Ltd. Co., Ltd.), dehydration for 3.5 hours; then the reaction temperature dropped to 75°C, and 3717g (19.2mol NCO group) hexamethylene diisocyanate trimer curing agent TKA100 (Asahi Kasei Chemical Co., Ltd.), 18g dibutyltin dilaurate, and 3717g anhydrous n-butyl ketone (Zhejiang Chemical Industry Co., Ltd.) were successively added to the reactor to insulate and react for 6 hours, and then kept in vacuum for 2 hours to obtain the isocyanate-terminated polycaprolactone polyol Prepolymer, get component A, seal it for later use after cooling down;

[0032] Preparation of Component B:

[0033] Put 230g of anhydrous methyl ethyl ketone (Hangzhou Chemical Reagent Co., Ltd.) in a container, and add 400g (0.46molOH group) of fluorocarbon resin L101 (Wanbo Paint Chemical Co., Ltd.) s...

Embodiment 3

[0036] A high-performance fluorocarbon coating, composed of two components, A and B.

[0037] Preparation of component A: Dehydrate 1000g of polycarbonate diol T5651 (1.96molOH group) (Guangzhou Haoyi Chemical Technology Co., Ltd.) at 130°C for 4.5 hours; Polycarbonate polyol T5651 added 1557g (4.41molNCO group) isophorone diisocyanate trimer Z4470BA (Bayer, Germany), 854g (4.41molNCO group) hexamethylene diisocyanate trimer curing agent TKA100 (Asahi Kasei Chemical Co., Ltd.), 2411g anhydrous ethyl acetate (Zhejiang Chemical Industry Co., Ltd.) were added to the reactor successively, kept for 5 hours insulated and kept in vacuum for 3 hours to obtain the isocyanate-terminated polycarbonate diol prepolymer , to obtain component A, and seal it for later use after cooling down;

[0038] Preparation of Component B:

[0039] 350g of anhydrous xylene (Hangzhou Chemical Reagent Co., Ltd.) was placed in a container, and 650g (1.7molOH group) of fluorocarbon resin GK570 (Dakin in Ja...

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Abstract

The invention relates to a preparation method of a high-performance fluorocarbon coating. The fluorocarbon coating is composed of a component A and a component B. The component A is composed of an isocyanate-capped polyol oligomer and an anhydrous diluent A, and the component B consists of fluorocarbon resin, dispersant, inorganic filler, catalysts and anhydrous diluents. The component A and the component B are mixed in accordance with the molar ratio of isocyanate to hydroxyl value being (0.6-1.5): 1 to obtain the fluorocarbon coating. The polyol oligomer contains polyester polyol and polyether polyol, endows the coating with outstanding mechanical performance, good low-temperature flexibility and hydrolysis resistance and is capped by isocyanate to be reacted with fluorocarbon resin, and soft segments formed by the polyol oligomer and the fluorocarbon resin and isocyanate hard segments are distributed regularly in the coating to form a three-dimensional network interpenetration structure. The prepared fluorocarbon coating has the advantages of ageing resistant and wind and sand resistant performance and is applicable in preparation of coating type solar cell back plates used in areas with adverse environments.

Description

technical field [0001] The invention relates to a preparation method of fluorocarbon paint, which belongs to the technical field of material surface protection. Background technique [0002] In the past ten years, the country's development in new energy, construction, machinery, automobiles, railways, etc. has driven the development of the corresponding coating industry. Through coating, the outdoor steel structure, aluminum curtain wall, wind power equipment, solar battery backplane etc. play a decorative and protective role, which can effectively resist external erosion on them and prolong their service life. The design of some large-scale and key steel structure engineering projects requires the durability of anti-corrosion coatings to reach 20 years, and the aluminum-plastic panels also require 20 years of non-fading. Fluorocarbon resin introduces fluorine element with high electronegativity and strong fluorine-carbon bond energy, which makes it have outstanding aging r...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D175/06C09D7/12C09D5/08C08G18/79C08G18/62C08G18/48C08G18/42C08G18/10
CPCC08G18/10C08G18/4063C08G18/4277C08G18/4854C08G18/6279C08G18/792C08L2205/03C09D5/08C09D7/61C09D7/65C09D175/06C09D175/08C08L83/04C08K2003/2241C08K3/04C08L83/12C08L67/00C08K2003/265C08G18/62
Inventor 李景菲林维红周光大林建华
Owner HANGZHOU FIRST APPLIED MATERIAL CO LTD
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