CN108912987A - A kind of finish and its preparation method - Google Patents

Abstract

The invention discloses a kind of finishes, are made of A and B two parts；The part A includes the following component of parts by weight：20-30 parts of deionized water, 70-80 parts of acrylate monomers, 0.1-0.2 parts of dispersing agent；The part B is isocyanates, and the mass ratio of the A and B are 1.25-4；Finish coating weatherability of the invention is excellent, extends the service life of film；It is finish film chemicals-resistant of the invention, anti-graffiti, it is suitble to use under the conditions of environment difference, expands the use scope of finish.

Description

A kind of finish and its preparation method

Technical field

The present invention relates to decorative materials technology more particularly to a kind of finish and its preparation methods.

Background technique

It is film forming matter that existing finish, which generallys use silicone-modified acrylic emulsion, in building coating field, though So it has the effect of protective topcoat coating, but due to itself film forming matter structure, and it is high to be unable to satisfy high-end finish The anti-graffiti function of weatherability stain resistant chemical resistance.

Traditional finish includes the following raw material of parts by weight：45-48 parts of water, 0.1-0.2 parts of pH adjusting agent, preservative 0.2-0.3 parts, 48-50 parts of fluorine-silicon modified acrylic lotion, 2.5-3.5 parts of decylene glycol ester, 2-3 parts of ethylene glycol, defoaming agent 0.05- 0.1 part.The film forming matter of the finish be one-component, film compactness is poor, and chemical resistance is poor, film vulnerable to pollution not Easy cleaning.

Publication No. CN102816483A discloses a kind of " aqueousance artificial granite composite coating cover that novel high water resistant is whitened Varnish " is grouped as by two groups of A, B；The component A consists of the following mass percentage components：Water-based hydroxyl fluorine carbon emulsion 40- 50%；Water based acrylic resin 20-30%；Levelling agent 0.2-0.4%；Defoaming agent 0.2-0.4%；Drier 0.1-0.2%, water 20-30%；The B component is water-soluble or is emulsifiable in water, is that the hydrophilic modifying hexa-methylene two of mass percent 75-85% is different Cyanate trimerization liquid solution.The film forming matter of the finishing varnish is bi-component, but film obtained still has compactness Difference, chemical resistance is poor, and film is vulnerable to the difficult cleaning of problem of pollution.

Summary of the invention

It is of the invention in order to solve the problems, such as that finish weatherability, chemicals-resistant, anti-graffiti performance are bad in the prior art Purpose is to provide a kind of finish and its configuration method.

To achieve the goals above, the present invention adopts the following technical scheme that：

The first aspect of the present invention provides a kind of finish, is made of A and B two parts；The part A includes parts by weight Following component：20-30 parts of deionized water, 70-80 parts of acrylate monomers, 0.1-0.2 parts of dispersing agent；The part B is The mass ratio of isocyanates, the A and B are 1.25-4.

It preferably, further include the following component of parts by weight in the part A：0.4-0.5 parts of pH adjusting agent, defoaming agent 0.05-0.1 parts, 0.4-0.5 parts of levelling agent.

Preferably, the levelling agent is that polyurethane thickens levelling agent.

Finish of the invention crosslinks reaction with A and part B in film forming procedure, generates aqueous polyurethane paint, adopts Levelling agent is thickened with polyurethane, with aqueous polyurethane paint similar compatibility, good dispersion, system is more stable.

The second aspect of the present invention provides the configuration method of above-mentioned finish, includes the following steps：

Deionized water is added into first reactor by S1, and dispersing agent, hydroxyl is added while stirring under 300-500 revs/min of revolving speed Base acrylic monomers, pH adjusting agent, defoaming agent and levelling agent stir 5-10 minutes, obtain part A；

S2, before use, part A is added into second reactor, adjustment revolving speed is 500-800 revs/min, and isocyanide is added while stirring Acid esters stirs 10-15 minutes, obtains finish.

The film forming matter of finish of the invention and publication No. CN102816483A are the two-component of A and B, A and B press than Example addition, crosslinks reaction in film forming procedure, the compactness of increase the formed film of finish, but publication No. The finish still compactness that CN102816483A is announced is not added, by experimental study repeatedly and demonstration, discovery The addition of drier is affected to performance in CN102816483A, and drier is accelerated to lead to body while finish rate of drying System is unevenly distributed, weatherability, and chemicals-resistant and anti-graffiti performance are still bad.

The finish of the invention acrylate monomers of part A and the isocyanates of part B in film forming procedure occur Polymerization reaction obtains polyurethane coating film, which is in reticular structure, and fine and close, surface is smooth hard, excellent chemical resistance.

Compared with prior art, the beneficial effect that the present invention realizes：Finish coating weatherability of the invention is excellent, extends The service life of film；It is finish film chemicals-resistant of the invention, anti-graffiti, it is suitble to use under the conditions of environment difference, expands The use scope of finish.

Specific embodiment

One, the selection of dispersing agent

Keep other components and dosage constant, respectively with the ammonium salt dispersing agent 4040 of the 5040 of Nuo Pu section, BASF, Bi Ke company BYK191, Mitsui Chemicals HI-WAX prepare finish as dispersing agent, stored 7 days at a temperature of 50-60 DEG C, observe each cover Topcoat system variation, the results are shown in Table 1.

Table 1

	The 5040 of Nuo Pu section	The 4040 of BASF	The BYK191 of Bi Ke	The HI-WAX of Mitsui Chemicals
					System viscosity variation	Viscosity increases	Viscosity increases	Viscosity is unchanged	Viscosity increases
Situation is precipitated in particle	No particle is precipitated	Particle is precipitated	No particle is precipitated	Particle is precipitated

As shown in table 1,5040 using Nuo Pu section are used as dispersing agent, and the finish of acquisition is after storage 7 days, and viscosity increases, no Easily spraying uniformly, leads to constructional difficulties；Using BASF 4040 and Mitsui Chemicals HI-WAX as dispersing agent, viscosity increases While there are particle precipitation, illustrate that dispersing agent bring dispersion effect is unsatisfactory, be not suitable for be applied to the system in；Using The BYK191 of Bi Ke does not change as dispersing agent, viscosity, is also precipitated without particle, illustrates that system is relatively stable, each group split-phase Capacitive is good, therefore selects the BYK191 of Bi Ke as dispersing agent of the invention.

Two, the selection of defoaming agent

Keep other components and dosage constant, respectively with the Silok-4010 of Si Luoke, in ten thousand W-2822, the NXZ in the Central Asia and The BYK024 of Bi Ke company is observed in preparation process and system performance after preparation as defoaming agent, and the results are shown in Table 2.

Table 2

	The Silok-4010 of Si Luoke	In ten thousand W-2822	The NXZ in the Central Asia	The BYK024 of Bi Ke company
					Performance compares	It can not defoam	It can not defoam	Can defoaming, but the finish surface after preparing floats and has oil bloom, and film has oily nest to generate	It can defoam, without oil bloom, film is stablized on the finish surface of preparation.

As shown in table 2, using the Silok-4010 of Si Luoke, ten thousand W-2822 is as defoaming agent in, in the mistake for preparing finish It can not be defoamed in journey, the presence of bubble causes system to be unevenly distributed, and influences the performance of finish；Using the NXZ conduct in the Central Asia Defoaming agent, the defoaming agent contain mineral oil, and causing the finish surface of preparation to be floatd has oil bloom, and oily nest occurs in film after construction, Influence product appearance；It using the BYK024 of Bi Ke company as defoaming agent, can defoam during the preparation process, the finish table of preparation Face is without oil bloom, and the film after construction is stablized, therefore selects the BYK024 of Bi Ke company as defoaming agent of the invention.

Three, embodiment

Embodiment 1

A kind of finish is made of A and B two parts；The part A is grouped as by following group：Acrylate monomers（Bayer Company's hydroxyl acrylic aqueous dispersion 2695）700g, dispersing agent（Bi Ke company wetting dispersing agent BYK191）1.5g, pH adjusting agent （The Dow Chemical Company PH regulator AMP-95）4g, defoaming agent（Bi Ke company defoaming agent BYK024）0.5g, levelling agent（The thickening of Nuo Pu section Levelling agent 612）4g；The part B is isocyanates（Beyer Co., Ltd's isocyanates 2655）Using preceding A is added in part B by 568g In part.

Embodiment 2

A kind of finish is made of A and B two parts；The part A is grouped as by following group：Acrylate monomers（Bayer Company's hydroxyl acrylic aqueous dispersion 2695）800g, dispersing agent（Bi Ke company wetting dispersing agent BYK191）2g, pH adjusting agent（Pottery Family name company PH regulator AMP-95）5g, defoaming agent（Bi Ke company defoaming agent BYK024）1g, levelling agent（Nuo Pu section thickening leveling Agent 612）4.5g；The part B is isocyanates（Beyer Co., Ltd's isocyanates 2655）, using preceding A is added in part B by 400g In part.

Embodiment 3

A kind of finish is made of A and B two parts；The part A is grouped as by following group：Acrylate monomers（Bayer Company's hydroxyl acrylic aqueous dispersion 2695）750g, dispersing agent（Bi Ke company wetting dispersing agent BYK191）1g, pH adjusting agent（Pottery Family name company PH regulator AMP-95）4.5g, defoaming agent（Bi Ke company defoaming agent BYK024）0.8g, levelling agent（The thickening of Nuo Pu section Levelling agent 612）5g；The part B is isocyanates（Beyer Co., Ltd's isocyanates 2655）Using preceding A is added in part B by 189g In part.

Cover by taking finish prepared by embodiment 3 as an example, with traditional finish, publication No. CN102816483A announcement Paint carries out resistance to soiling, resistance to acid and alkali and anti-graffiti performance respectively and compares, and the results are shown in Table 3.

Table 3

The finish resistance to soiling that publication No. CN102816483A is announced is poor, poor and not anti-graffiti, the of the invention cover of acid-proof alkaline For finishing coat using pure acrylate monomers and isocyanates as crosslinking substance, acid and alkali-resistance and anti-graffiti keeping a public place clean property are much better than announcement Number CN102816483A product.

The above specific embodiments are only exemplary, is to preferably make skilled artisans appreciate that originally Patent, be not to be construed as include to this patent range limitation；As long as appointing made by the spirit according to disclosed in this patent How with change or modification, the range that this patent includes is each fallen within.

Claims (4)

1. a kind of finish, which is characterized in that it is made of A and B two parts；The part A includes parts by weight such as the following group Point：20-30 parts of deionized water, 70-80 parts of acrylate monomers, 0.1-0.2 parts of dispersing agent；The part B is isocyanates, The mass ratio of the A and B is 1.25-4.

2. finish as described in claim 1, which is characterized in that further include the following component of parts by weight in the part A： 0.4-0.5 parts of pH adjusting agent, 0.05-0.1 parts of defoaming agent, 0.4-0.5 parts of levelling agent.

3. finish as claimed in claim 2, which is characterized in that the levelling agent is that polyurethane thickens levelling agent.

4. a kind of preparation method of any one of claim 1-3 finish, which is characterized in that include the following steps：

Deionized water is added into first reactor by S1, and dispersing agent, hydroxyl is added while stirring under 300-500 revs/min of revolving speed Base acrylic monomers, pH adjusting agent, defoaming agent and levelling agent stir 5-10 minutes, obtain part A；

S2, before use, part A is added into second reactor, adjustment revolving speed is 500-800 revs/min, and isocyanide is added while stirring Acid esters stirs 10-15 minutes, obtains finish.