CN102363700A

CN102363700A - Aqueous dual-component bright top finish and its preparation method

Info

Publication number: CN102363700A
Application number: CN2011101816526A
Authority: CN
Inventors: 吕跃文
Original assignee: CHENGDU BEIDA COATING Co Ltd
Current assignee: CHENGDU BEIDA COATING Co Ltd
Priority date: 2011-06-30
Filing date: 2011-06-30
Publication date: 2012-02-29
Anticipated expiration: 2031-06-30
Also published as: CN102363700B

Abstract

The invention discloses an aqueous dual-component bright top finish and its preparation method and belongs to the field of paints. The aqueous dual-component bright top finish is made from a component A and a component B, wherein the component A contains: by weight, 70-80 parts of polyacrylic acid polyol, 0.1-0.5 part of a levelling agent, 0.1-0.5 part of a pH regulator, 0.1-0.5 part of an antifoaming agent, 0.1-2.0 parts of a film-forming additive and 1.0-5.0 parts of water; the component B is anionic modified HDI polyisocyanate; and the weight ratio of the component A to the component B is 1: 0.2-0.3. The aqueous dual-component bright top finish provided by the invention has excellent luster and appearance, excellent antifouling property and chemical resistance, will not become yellow, has antirust property and high temperature resistance, and can be constructed with other paints such as an emulsion paint and the like.

Description

Full light clear finish of aqueous dual-component and preparation method thereof

Technical field

The invention belongs to paint field, be specifically related to full light clear finish of a kind of aqueous dual-component and preparation method thereof.

Background technology

Present various coating types on the market are various, mainly are divided into organic coating and inorganic paint, and organic coating is divided into organic solvent type coating and organic water-borne coatings again according to the solvent difference of using.Organic solvent type coating is because VOC is high, can not satisfy people day by day enhanced to environmental protection requirement.

Organic water-borne coatings, i.e. water-borne coatings becomes the focus of research now day by day; With vinylformic acid is the aqueous woodware paint of staple, and principal feature is that sticking power is good, can not deepen the color of woodenware; But wear-resisting and anti-chemical is relatively poor, and hardness of paint film is softer, and the examination of pencil rule is HB; Fullness ratio is relatively poor, and over-all properties is general, and construction is prone to produce defective.

Existing coating causes easily that paint film is inhomogeneous, degradation after for some time, do not have lacquer such as sticking power sick, and stain resistance and chemical moral character are poor, easily poor, the non-refractory of xanthochromia, antirust ability etc.

Summary of the invention

The technical problem that the present invention will solve is that coating causes easily that paint film is inhomogeneous, degradation after for some time, do not have lacquer such as sticking power sick in the prior art, and stain resistance and chemical moral character are poor, easily the problem of poor, the non-refractory of xanthochromia, antirust ability.

The technical scheme that the present invention solves this technical problem is: the full light clear finish of aqueous dual-component; It is made up of component A and B component, and the weight proportion of said component A is: 70～80 parts of ROHM polyvalent alcohols, 0.1～0.5 part of flow agent; 0.1～0.5 part of pH regulator agent; 0.1～0.5 part of skimmer, 0.1～2.0 part of film coalescence aid, 1.0～5.0 parts in water; Said B component is anion-modified HDI POLYMETHYLENE POLYPHENYLISOCYANATE, and the weight ratio of component A and B component is: component A ︰ B component=1 ︰ 0.2～0.3.

Wherein, in the weight proportion of above-mentioned said component A, the ROHM polyvalent alcohol is 75 parts, and flow agent is 0.3 part, and the pH regulator agent is 0.3 part, and skimmer is 0.3 part, and film coalescence aid is 1 part, and water is 0.3 part.

Wherein, the weight ratio of above-mentioned said component A and B component is 1 ︰ 0.25.

Wherein, above-mentioned said pH regulator agent is among the AP-95 and auxiliary agent, the organic amine that it is made up of hydroxyl and amido.

Wherein, above-mentioned said film coalescence aid is the dipropylene glycol butyl ether.

Wherein, the above-mentioned said anion-modified HDI POLYMETHYLENE POLYPHENYLISOCYANATE Bayhydur3100 that is Bayer.

The present invention also provides the preparation method of the full light clear finish of a kind of aqueous dual-component, and it may further comprise the steps:

A, in container, add 70～80 parts of ROHM polyvalent alcohols, 0.1～0.5 part of flow agent, 0.1～0.5 part of pH regulator agent, 0.1～0.5 part of skimmer, 0.1～2.0 part of film coalescence aid successively by weight; Stir; 1.0～5.0 parts of cleaning equipments of water and adjustment viscosity filter and obtain component A.

B, component A and B component are added the water allotment evenly by weight 1 ︰ 0.2～0.3, get product, said B component is anion-modified HDI POLYMETHYLENE POLYPHENYLISOCYANATE.

Wherein, the rotating speed of above-mentioned said stirring is 600～800 rev/mins.

Wherein, above-mentioned said adjustment viscosity is meant adjustment viscosity to 120～130KU.

The present invention is to be the coating of solvent or dispersion medium with water, and it has important environment protection significance, asepsis environment-protecting, and hazardous solvent such as containing benezene does not contain free TDI, by the invisible transformation of solvent-borne type PU hydrotropisms PU.

The present invention adopts ROHM polyvalent alcohol and POLYMETHYLENE POLYPHENYLISOCYANATE to send out through chemically crosslinked and answers, and generates a kind of high performance polyether polyols with reduced unsaturation.Solved ROHM polyvalent alcohol and the perfect emulsification of anion-modified HDI POLYMETHYLENE POLYPHENYLISOCYANATE under low-shearing power, be easy to mix; Solved owing to the emulsifying agent of bonding not moves in coating and caused that paint film is inhomogeneous, degradation after for some time, do not had lacquer such as sticking power sick, guaranteed that the emulsifying agent group is connected on the polymer chain and uniform distribution, made coating have permanent stability.

The present invention has excellent gloss and outward appearance, and stain resistance and chemical moral character are excellent, xanthochromia, antirust, high temperature resistant not, can with other paint construction simultaneously such as rubber-emulsion paint.

Embodiment

In the following example, the ROHM polyvalent alcohol adopts the Bayhydrol A145 of Bayer A.G, and the pH regulator agent is among the AP-95 of the Dow Chemical Company and auxiliary agent, and film coalescence aid adopts the dipropylene glycol butyl ether.

Embodiment 1

A, add ROHM polyvalent alcohol 70Kg, flow agent (the Troysol LAC of U.S. Troy chemical company) 0.1 Kg part, pH regulator agent 0.1 Kg, skimmer (BYK 028 of German Bi Ke) 0.1 Kg, film coalescence aid 0.1 Kg successively at stirred vessel; Under 600 rev/mins of stirrings, stir; Water 1.0 Kg cleaning equipments arrive 120KU with adjustment viscosity, filter and obtain component A.

B, even by the proportioning allotment of component A ︰ component B ︰ water=1 ︰, 0.2 ︰ 0.3 gets product, and said B component is anion-modified HDI POLYMETHYLENE POLYPHENYLISOCYANATE.

Embodiment 2

A, add ROHM polyvalent alcohol 80 Kg, flow agent (BYK346 of German Bi Ke) 0.5 Kg, pH regulator agent 0.5 Kg, skimmer (BYK 028 of German Bi Ke) 0.5 Kg, film coalescence aid 2.0 Kg successively at stirred vessel; Under 800 rev/mins of stirrings, stir; Water 5.0 Kg cleaning equipments arrive 130KU with adjustment viscosity, filter and obtain component A.

B, even by the proportioning allotment of component A ︰ component B ︰ water=1 ︰, 0.3 ︰ 0.5 gets product, and said B component is anion-modified HDI POLYMETHYLENE POLYPHENYLISOCYANATE.

Embodiment 3

A, add ROHM polyvalent alcohol 75Kg, flow agent (BYK 346 of German Bi Ke) 0.3 Kg, pH regulator agent 0.3 Kg, skimmer (the Tego 902W of Di Gao company) 0.3 Kg, film coalescence aid 1 Kg successively at stirred vessel; Under 700 rev/mins of stirrings, stir; Water 3 Kg cleaning equipments arrive 125KU with adjustment viscosity, filter and obtain component A.

B, even by the proportioning allotment of component A ︰ component B ︰ water=1 ︰, 0.25 ︰ 0.4 gets product, and said B component is anion-modified HDI POLYMETHYLENE POLYPHENYLISOCYANATE.

Embodiment 4

A, add ROHM polyvalent alcohol 77 Kg, flow agent (BYK 346 of German Bi Ke) 0.25 Kg, pH regulator agent 0.2 Kg, skimmer (EFKA 2035 of EFKA company) 0.2 Kg, film coalescence aid 1.8 Kg successively at stirred vessel; Under 750 rev/mins of stirrings, stir; Water 2 Kg cleaning equipments arrive 127KU with adjustment viscosity, filter and obtain component A.

B, even by the proportioning allotment of component A ︰ component B ︰ water=1 ︰, 0.25 ︰ 0.3 gets product, and said B component is anion-modified HDI POLYMETHYLENE POLYPHENYLISOCYANATE.

Embodiment 5

A, add ROHM polyvalent alcohol 72Kg, flow agent (BYK 346 of German Bi Ke) 0.4 Kg, pH regulator agent 0.2 Kg, skimmer (BYK 028 of German Bi Ke) 0.4 Kg, film coalescence aid 0.9 Kg successively at stirred vessel; Under 650 rev/mins of stirrings, stir; Water 4 Kg cleaning equipments and adjustment viscosity filter and obtain component A.

B, even by the proportioning allotment of component A ︰ component B ︰ water=1 ︰, 0.25 ︰ 0.35 gets product, and said B component is anion-modified HDI POLYMETHYLENE POLYPHENYLISOCYANATE.

?

Each embodiment product parameters performance table of table 1:

Test event

Solvent-borne type

Embodiment 1

Embodiment 2

Embodiment 3

Embodiment 4

Embodiment 5

Paint film appearance

Smooth smooth

The feature of environmental protection

Contain hazardous solvents such as benzene

Do not contain hazardous solvents such as benzene

Free TDI

Contain

Do not contain

Sticking power

0 grade

Pencil hardness

H

Chemical-resistant

Excellent

Leveling characteristics

Excellent

Generally

Can accept

Excellent

Defoaming

Excellent

Generally

Excellent

Can accept

Surface drying (min)

10-20

15

16

15

17

13

Tack-free (h)

2-4

3

Gloss

≥90

95

96

93

98

92

VOC（g/l）

Less than 580

＜200

Application property

Be prone to

Find out that from table 1 product VOC content of the present invention is starkly lower than solvent type lacquer, and does not contain benzene and free TDI, environmental protection more, other indexs also are equal to solvent-borne type.

Claims

1. full light clear finish of aqueous dual-component; It is characterized in that: it is made up of component A and B component, and the weight proportion of said component A is: 70～80 parts of ROHM polyvalent alcohols, 0.1～0.5 part of flow agent; 0.1～0.5 part of pH regulator agent; 0.1～0.5 part of skimmer, 0.1～2.0 part of film coalescence aid, 1.0～5.0 parts in water; Said B component is anion-modified HDI POLYMETHYLENE POLYPHENYLISOCYANATE, and the weight ratio of component A and B component is: component A ︰ B component=1 ︰ 0.2～0.3.

2. the full light clear finish of aqueous dual-component according to claim 1 is characterized in that: in the weight proportion of said component A, the ROHM polyvalent alcohol is 75 parts; Flow agent is 0.3 part, and the pH regulator agent is 0.3 part, and skimmer is 0.3 part; Film coalescence aid is 1 part, and water is 0.3 part.

3. the full light clear finish of aqueous dual-component according to claim 1 is characterized in that: the weight ratio of said component A and B component is 1 ︰ 0.25.

4. the full light clear finish of aqueous dual-component according to claim 1 is characterized in that: said pH regulator agent is among the AP-95 and auxiliary agent.

5. the full light clear finish of aqueous dual-component according to claim 1 is characterized in that: said film coalescence aid is the dipropylene glycol butyl ether.

6. the preparation method of the full light clear finish of aqueous dual-component, it is characterized in that: it may further comprise the steps:

A, in container, add 70～80 parts of ROHM polyvalent alcohols, 0.1～0.5 part of flow agent, 0.1～0.5 part of pH regulator agent, 0.1～0.5 part of skimmer, 0.1～2.0 part of film coalescence aid successively by weight; Stir; 1.0～5.0 parts of cleaning equipments of water and adjustment viscosity filter and obtain component A;

7. the preparation method of the full light clear finish of aqueous dual-component according to claim 6 is characterized in that: the rotating speed of said stirring is 600～800 rev/mins.

8. the preparation method of the full light clear finish of aqueous dual-component according to claim 6 is characterized in that: said adjustment viscosity is meant adjustment viscosity to 120～130KU.