CN105153884A - Self-cleaning valve antifouling powdery paint and manufacturing method thereof - Google Patents

Abstract

The invention discloses self-cleaning 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 is 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 self-cleaning performance, and the prepared product is free of solvent, green and environment-friendly, the formed paint film is flat and smooth in surface, and the paint possesses the characteristics of being high in glossiness, excellent in levelability and easy for surface cleaning.

Description

Antifouling powder coating of a kind of automatically cleaning valve and preparation method thereof

Technical field

The present invention relates to paint field, be specifically related to antifouling powder coating of a kind of automatically cleaning valve 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 is just to provide antifouling powder coating of a kind of automatically cleaning valve and preparation method thereof, to overcome the deficiencies in the prior art.

The object of the present invention is achieved like this:

The antifouling powder coating of a kind of automatically cleaning valve, it is characterized in that, be made up of the raw material of following weight part: high hydroxy polyester resin 58-69, Hydroxylated acrylic resin 20-30, HDI tripolymer 4-7, polyvinylidene difluoride (PVDF) 7-11, nano titanium oxide 1.3-2.7, wilkinite 7-9, melamine cyanurate 0.7-1.3,1,6-diisocyanato-Hexane 9-15, dinoctyl phthalate 8-12, sodium tartrate 0.4-0.7, royal jelly 6-8, hexamethyldisiloxane 1.5-2.7, N,N-DIMETHYLACETAMIDE 20-30.

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

(1) by 1,6-diisocyanato-Hexane, dinoctyl phthalate stirring and evenly mixing, be warming up to 75-95 DEG C and add wilkinite, fully stir and condensing reflux reaction 2-4h, ultrasonic disperse is even, and spraying dry obtains modified alta-mud;

(2) by nano titanium oxide in 712-825 DEG C of high-temperature calcination 30-50 minute, be cooled to room temperature ultrasonic concussion 20-40 minute, add royal jelly, hexamethyldisiloxane stirring and evenly mixing, be warming up to 60-80 DEG C, 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 modified alta-mud, melamine cyanurate ultrasonic disperse is even, 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 the high and low temperature resistance that modified polyvinylidene difluoride (PVDF) improves 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 the lasting self-cleaning performance of resistance to pickup, the obtained solvent-free environmental protection of product, coating surface flat smooth, also there is glossiness high, levelling property is good, the feature of surface easy to clean.

Embodiment

The described antifouling powder coating of a kind of automatically cleaning valve, it is characterized in that, be made up of the raw material of following weight part: high hydroxy polyester resin 65, Hydroxylated acrylic resin 28, HDI tripolymer 5, polyvinylidene difluoride (PVDF) 11, nano titanium oxide 1.5, wilkinite 8, melamine cyanurate 0.9,1,6-diisocyanato-Hexane 12, dinoctyl phthalate 9, sodium tartrate 0.6, royal jelly 7, hexamethyldisiloxane 2.5, N,N-DIMETHYLACETAMIDE 25.

Making method comprises the following steps:

(1) by 1,6-diisocyanato-Hexane, dinoctyl phthalate stirring and evenly mixing, be warming up to 75-95 DEG C and add wilkinite, fully stir and condensing reflux reaction 2-4h, ultrasonic disperse is even, and spraying dry obtains modified alta-mud;

(2) by nano titanium oxide in 712-825 DEG C of high-temperature calcination 30-50 minute, be cooled to room temperature ultrasonic concussion 20-40 minute, add royal jelly, hexamethyldisiloxane stirring and evenly mixing, be warming up to 60-80 DEG C, 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 modified alta-mud, melamine cyanurate ultrasonic disperse is even, 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: 115.6 °.

Claims (2)

1. the antifouling powder coating of automatically cleaning valve, it is characterized in that, be made up of the raw material of following weight part: high hydroxy polyester resin 58-69, Hydroxylated acrylic resin 20-30, HDI tripolymer 4-7, polyvinylidene difluoride (PVDF) 7-11, nano titanium oxide 1.3-2.7, wilkinite 7-9, melamine cyanurate 0.7-1.3,1,6-diisocyanato-Hexane 9-15, dinoctyl phthalate 8-12, sodium tartrate 0.4-0.7, royal jelly 6-8, hexamethyldisiloxane 1.5-2.7, N,N-DIMETHYLACETAMIDE 20-30.

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

(1) by 1,6-diisocyanato-Hexane, dinoctyl phthalate stirring and evenly mixing, be warming up to 75-95 DEG C and add wilkinite, fully stir and condensing reflux reaction 2-4h, ultrasonic disperse is even, and spraying dry obtains modified alta-mud;

(2) by nano titanium oxide in 712-825 DEG C of high-temperature calcination 30-50 minute, be cooled to room temperature ultrasonic concussion 20-40 minute, add royal jelly, hexamethyldisiloxane stirring and evenly mixing, be warming up to 60-80 DEG C, 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 modified alta-mud, melamine cyanurate ultrasonic disperse is even, 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.