CN105153886A - Ultraviolet-resistant valve antifouling powdery paint and manufacturing method thereof - Google Patents

Abstract

The invention discloses ultraviolet-resistant valve antifouling powdery paint. High-hydroxyl polyester resin and hydroxy acrylic resin are taken as main film-forming substances, HDI trimer is taken as a curing agent, the product high/low-temperature resistance and ultraviolet resistance and other performances are improved after modified polyvinylidene fluoride is added, and other effective additives are added, are good in intermiscibility after being modified, are capable of rapidly floating on a paint film surface, and are fixedly attached to the paint film surface through hydroxyl and -NCO, so that pollutants are difficult to attach to the paint film surface, and therefore the paint film possesses durable antifouling performance, a prepared product film is smooth and flat and possesses the advantages of being resistant to ultraviolet, resistant to wear, uniform in abrasion rate, energy-saving, consumption-reducing and the like, and also the paint is free of solvents, does not harm environment and accords with environment protection requirements.

Description

Antifouling powder coating of valve of a kind of ultraviolet resistance and preparation method thereof

Technical field

The present invention relates to paint field, antifouling powder coating of valve being specifically related to a kind of ultraviolet resistance and preparation method thereof.

Background technology

In recent years, the application of powder coating has surmounted water-borne coatings and high solid coating etc. in coatings industry, becomes industry member and uses one of more coating variety.Powder coating process solves the problems such as inflammable, the explosive and contaminate environment existing for traditional paint coating process, and its coating possesses superior performance, the recyclable use again of raw material, and coating process is simple.Valve housing painting can be widely used in load onto.Because valve body is foundry goods or forging, therefore its surface irregularity, also certain defect is there is in currently available technology for the functional powder coating technology of valve surface process, cause coating to occur the defects such as shrinkage cavity, pinprick and serious orange peel shape, and then cause valve to be restricted in special dimension application such as food, biology, pharmacy, chemical industry, space flight and electronics.Thus research and develop multi-functional weather-proof, high-low temperature resistant, waterproof antiwear, anlistatig self-cleaning anti-pollution powder coating, possess skills the meaning promoting to improve with industry.

Summary of the invention

Object of the present invention antifouling powder coating of valve being just to provide a kind of ultraviolet resistance and preparation method thereof, to overcome the deficiencies in the prior art.

The object of the present invention is achieved like this:

A kind of antifouling powder coating of valve of ultraviolet resistance, it is characterized in that, be made up of the raw material of following weight part: high hydroxy polyester resin 53-59, Hydroxylated acrylic resin 24-33, HDI tripolymer 3.1-4.2, polyvinylidene difluoride (PVDF) 7-11, nano titanium oxide 1.4-2.8, organosilicon acrylic resin emulsion 8-12, trioctyl trimellitate 6-9, river shell powder 10-14, barium sulfate 0.2-0.4, dimethoxydiphenylsilane 3-5, polyacrylonitrile fibre 1.8-2.9, ESCALOL 567 0.04-0.08, N,N-DIMETHYLACETAMIDE 26-34.

The preparation method of the antifouling powder coating of valve of described a kind of ultraviolet resistance, is characterized in that comprising the following steps:

(1) by organosilicon acrylic resin emulsion, trioctyl trimellitate stirring and evenly mixing, be warming up to 75-95 DEG C and add river shell powder, fully stir and condensing reflux reaction 2-4h, ultrasonic disperse is even, and spraying dry obtains modification river shell powder;

(2) by nano titanium oxide in 705-810 DEG C of high-temperature calcination 30-50 minute, be cooled to room temperature ultrasonic concussion 20-40 minute, add dimethoxydiphenylsilane, ESCALOL 567 stirring and evenly mixing, be warming up to 60-80 DEG C, add polyacrylonitrile fibre extra-fine grinding 1-3 hour, dry for standby;

(3) in N,N-DIMETHYLACETAMIDE, add polyvinylidene difluoride (PVDF), after 35 DEG C of heating in water bath are dissolved to clarification, add modification river shell powder ultrasonic disperse evenly, carry out electrostatic spinning, pulverize;

(4) high hydroxy polyester resin, Hydroxylated acrylic resin are put into high mixer high speed and be uniformly mixed 40-60 minute, add step (2), step (3) material and other remaining component, pre-mixing 1-2 hour, drop into melting mixing extruding pelletization in twin screw extruder, pellet is sent into pulverizing mill and is worn into fine powder discharging.

The present invention has following beneficial effect: the present invention selects high hydroxy polyester resin, Hydroxylated acrylic resin is main film forming matter, HDI tripolymer is solidifying agent, add modified polyvinylidene difluoride (PVDF) and improve the performances such as the high-low temperature resistant UV resistant of product, also add other effective additives and in addition modified simultaneously, intermiscibility is good, coating surface can be floated to rapidly, coating surface is fixed on by hydroxyl and-NCO reaction, pollutent is made to be difficult to attach to coating surface, thus make paint film have lasting polluting proofing property energy, obtained product film is smooth, there is UV resistant, wear-resisting, erosive rate is even, the advantage such as energy-saving and cost-reducing, this coating is solvent-free does not simultaneously endanger environment, meet environmental requirement.

Embodiment

The antifouling powder coating of valve of described a kind of ultraviolet resistance, it is characterized in that, be made up of the raw material of following weight part: high hydroxy polyester resin 58, Hydroxylated acrylic resin 27, HDI tripolymer 3.7, polyvinylidene difluoride (PVDF) 11, nano titanium oxide 1.6, organosilicon acrylic resin emulsion 12, trioctyl trimellitate 8, river shell powder 13, barium sulfate 0.3, dimethoxydiphenylsilane 4, polyacrylonitrile fibre 1.8, ESCALOL 567 0.06, N,N-DIMETHYLACETAMIDE 32.

Making method comprises the following steps:

(1) by organosilicon acrylic resin emulsion, trioctyl trimellitate stirring and evenly mixing, be warming up to 75-95 DEG C and add river shell powder, fully stir and condensing reflux reaction 2-4h, ultrasonic disperse is even, and spraying dry obtains modification river shell powder;

(2) by nano titanium oxide in 705-810 DEG C of high-temperature calcination 30-50 minute, be cooled to room temperature ultrasonic concussion 20-40 minute, add dimethoxydiphenylsilane, ESCALOL 567 stirring and evenly mixing, be warming up to 60-80 DEG C, add polyacrylonitrile fibre extra-fine grinding 1-3 hour, dry for standby;

(3) in N,N-DIMETHYLACETAMIDE, add polyvinylidene difluoride (PVDF), after 35 DEG C of heating in water bath are dissolved to clarification, add modification river shell powder ultrasonic disperse evenly, carry out electrostatic spinning, pulverize;

(4) high hydroxy polyester resin, Hydroxylated acrylic resin are put into high mixer high speed and be uniformly mixed 40-60 minute, add step (2), step (3) material and other remaining component, pre-mixing 1-2 hour, drop into melting mixing extruding pelletization in twin screw extruder, pellet is sent into pulverizing mill and is worn into fine powder discharging.

The technical parameter index of the antifouling powder coating using the present invention to produce is as follows:

(1) paint film appearance flat smooth, surface tinted is consistent, without particle, pin hole, bubble, wrinkle;

(2) sticking power is good, shock-resistant, and resistance to marring is good;

(3) static minimal contact angle is recorded according to GB/T2376: 112.5 °;

(4) salt fog resistance/h:1000 is recorded according to GB/T1771.

Claims (2)

1. the antifouling powder coating of the valve of a ultraviolet resistance, it is characterized in that, be made up of the raw material of following weight part: high hydroxy polyester resin 53-59, Hydroxylated acrylic resin 24-33, HDI tripolymer 3.1-4.2, polyvinylidene difluoride (PVDF) 7-11, nano titanium oxide 1.4-2.8, organosilicon acrylic resin emulsion 8-12, trioctyl trimellitate 6-9, river shell powder 10-14, barium sulfate 0.2-0.4, dimethoxydiphenylsilane 3-5, polyacrylonitrile fibre 1.8-2.9, ESCALOL 567 0.04-0.08, N,N-DIMETHYLACETAMIDE 26-34.

2. the making method of the antifouling powder coating of valve of a kind of ultraviolet resistance according to claim 1, is characterized in that comprising the following steps:

(1) by organosilicon acrylic resin emulsion, trioctyl trimellitate stirring and evenly mixing, be warming up to 75-95 DEG C and add river shell powder, fully stir and condensing reflux reaction 2-4h, ultrasonic disperse is even, and spraying dry obtains modification river shell powder;

(2) by nano titanium oxide in 705-810 DEG C of high-temperature calcination 30-50 minute, be cooled to room temperature ultrasonic concussion 20-40 minute, add dimethoxydiphenylsilane, ESCALOL 567 stirring and evenly mixing, be warming up to 60-80 DEG C, add polyacrylonitrile fibre extra-fine grinding 1-3 hour, dry for standby;

(3) in N,N-DIMETHYLACETAMIDE, add polyvinylidene difluoride (PVDF), after 35 DEG C of heating in water bath are dissolved to clarification, add modification river shell powder ultrasonic disperse evenly, carry out electrostatic spinning, pulverize;

(4) high hydroxy polyester resin, Hydroxylated acrylic resin are put into high mixer high speed and be uniformly mixed 40-60 minute, add step (2), step (3) material and other remaining component, pre-mixing 1-2 hour, drop into melting mixing extruding pelletization in twin screw extruder, pellet is sent into pulverizing mill and is worn into fine powder discharging.