阅读说明：本技术 一种用在jts复合膜上的双组份涂料及其制备方法 (Double-component coating used on JTS composite membrane and preparation method thereof ) 是由 高树强 张莎 李思成 于 2020-12-29 设计创作，主要内容包括：本发明涉及一种用在JTS复合膜上的双组份涂料,包含组分A和组分B,其中组分A由以下重量份数的原材料组成：NPEL128环氧树脂：30-34份,改性增韧树脂：3-7份,分散剂：0.2-0.4份,耐水煮助剂：0.8-1.2份,有机膨润土：0.3-0.5份,触变剂：0.3-0.5份,防锈颜料：19-26份,硫酸钡：16-19份,硅微粉：3-7份,二甲苯：10-14份,丁醇：2-6份,二甲苯和丁醇为溶剂；组分B由以下重量份数的原材料组成：ZG-6019腰果酚固化剂：45-55份,ZG-8013活性稀释剂：5-15份,二甲苯：35-45份,二甲苯为溶剂；组分A与组分B的重量比为10：1。本双组份涂料与JTS复合膜具有很强的附着力,且具有很好的防腐能力。(The invention relates to a two-component coating for a JTS composite membrane, which comprises a component A and a component B, wherein the component A is prepared from the following raw materials in parts by weight: NPEL128 epoxy resin: 30-34 parts of modified toughening resin: 3-7 parts of a dispersant: 0.2-0.4 part of boiling-resistant auxiliary agent: 0.8-1.2 parts of organic bentonite: 0.3-0.5 part of thixotropic agent: 0.3-0.5 part of antirust pigment: 19-26 parts of barium sulfate: 16-19 parts of silicon powder: 3-7 parts of xylene: 10-14 parts, butanol: 2-6 parts of dimethylbenzene and butanol as solvents; the component B consists of the following raw materials in parts by weight: ZG-6019 Cardanol curing agent: 45-55 parts of ZG-8013 active diluent: 5-15 parts of xylene: 35-45 parts of dimethylbenzene as a solvent; the weight ratio of the component A to the component B is 10: 1. the two-component coating and the JTS composite membrane have strong adhesive force and good anticorrosion capability.)

1. The two-component coating for the JTS composite membrane is characterized by comprising a component A and a component B, wherein the component A is prepared from the following raw materials in parts by weight:

NPEL128 epoxy resin: 30-34 parts of modified toughening resin: 3-7 parts of a dispersant: 0.2-0.4 part of boiling-resistant auxiliary agent: 0.8-1.2 parts of organic bentonite: 0.3-0.5 part of thixotropic agent: 0.3-0.5 part of antirust pigment: 19-26 parts of barium sulfate: 16-19 parts of silicon powder: 3-7 parts of xylene: 10-14 parts, butanol: 2-6 parts of dimethylbenzene and butanol which are used as solvents;

the component B consists of the following raw materials in parts by weight: ZG-6019 Cardanol curing agent: 45-55 parts of ZG-8013 active diluent: 5-15 parts of xylene: 35-45 parts of dimethylbenzene as a solvent;

the weight ratio of the component A to the component B is 10: 1.

2. the two-component coating for JTS composite membrane according to claim 1, wherein: the boiling-resistant auxiliary agent is a silane coupling agent containing epoxy group and trimethoxy.

3. The two-component coating for JTS composite membrane according to claim 1, wherein: the antirust pigment consists of zinc phosphate and iron oxide red, wherein the zinc content of the zinc phosphate is more than 40%: 8-12 parts of iron oxide red: 11-14 parts.

4. The two-component paint for JTS composite membrane according to claim 3, wherein the red iron oxide is Langshan 148# red iron oxide.

5. The two-component coating for the JTS composite membrane according to claim 1, wherein the modified toughening resin is a flexible resin, and has the characteristics of increasing toughness and adhesion.

6. The two-component coating for JTS composite membrane according to claim 5, wherein the modified toughening resin is a thermoplastic resin toughening epoxy resin.

7. The two-component paint for JTS composite membrane according to claim 1, wherein L-288 barium sulfate is used as the barium sulfate.

8. The two-component coating for JTS composite membranes as defined by claim 1, wherein the dispersant is an Effkona PF-502 type dispersant.

9. A method for preparing a two-component paint for JTS composite membrane according to any of claims 1 to 8, comprising the steps of:

preparation of component A:

the first step is as follows: adding NPEL128 epoxy resin, modified toughening resin, a dispersing agent, a boiling-resistant auxiliary agent, organic bentonite, a thixotropic agent and a small amount of solvent into a stirring tank, and stirring at a high speed of 1200r/min for 20 min;

the second step is that: then adding the rust-proof pigment, barium sulfate, silicon micropowder and a small amount of solvent, and stirring at a high speed of 1200r/min for 30 min;

the third step: pouring the mixture obtained by stirring into a sand mill for grinding at the grinding temperature of 40-50 ℃ until the grinding fineness reaches 35 mu m, and adding a solvent after grinding, wherein the weight ratio of xylene: the butanol is 7:3, the viscosity is adjusted to 80-100s, and then the component A is obtained after the filtration by a 120-mesh filter screen;

preparation of component B:

uniformly stirring ZG-6019 cardanol curing agent, ZG-8013 active diluent and dimethylbenzene to obtain a component B:

when in use, the component A and the component B are mixed according to the weight ratio of the component A to the component B being 10: 1, stirring uniformly at normal temperature.

Technical Field

The invention relates to the technical field of coatings, in particular to a two-component coating used on a JTS composite membrane and a preparation method thereof.

Background

As a manufacturing big country, China has a large number of metal pretreatment requirements every year. The existing pretreatment process of a plurality of special-shaped steel structures mostly adopts a large-tank soaking treatment process, the physical pretreatment can hardly meet the requirements under the condition that the chemical pretreatment can not be carried out, and waste acid, waste alkali, phosphorization sediment, phosphorization waste liquid and passivation waste liquid generated by the chemical pretreatment have strong environmental hazard. At present, the metal pretreatment process in the Zhujiang Delta region, the Yangtze Delta region and the Jingjin Ji region is basically forbidden. The pretreatment methods of physical and chemical methods have low automation degree and high labor cost, so that the coating is required to have the capability of meeting the requirement of low surface treatment, and the low surface treatment anticorrosive coating is one of the development directions of anticorrosive coatings. JTS metal surface treatment liquid is a wide-range coating with low surface treatment requirement. The JTS composite film coating is formed on the surface of the coated object.

Disclosure of Invention

The invention provides a two-component coating used on a JTS composite membrane and a preparation method thereof, and the coating has excellent adhesive force and corrosion resistance on nonferrous metals.

The two-component coating for the JTS composite membrane is characterized by comprising a component A and a component B, wherein the component A is prepared from the following raw materials in parts by weight:

NPEL128 epoxy resin: 30-34 parts of modified toughening resin: 3-7 parts of a dispersant: 0.2-0.4 part of water boiling resistant auxiliary agent: 0.8-1.2 parts of organic bentonite: 0.3-0.5 part of thixotropic agent: 0.3-0.5 part of antirust pigment: 19-26 parts of barium sulfate: 16-19 parts of silicon powder: 3-7 parts of xylene: 10-14 parts, butanol: 2-6 parts of dimethylbenzene and butanol which are used as solvents;

the component B consists of the following raw materials in parts by weight: ZG-6019 Cardanol curing agent: 45-55 parts of ZG-8013 active diluent: 5-15 parts of xylene: 35-45 parts of dimethylbenzene as a solvent;

the weight ratio of the component A to the component B is 10: 1.

further: the boiling-resistant auxiliary agent is a silane coupling agent containing epoxy group and trimethoxy.

Further: the antirust pigment consists of zinc phosphate and iron oxide red, wherein the zinc content of the zinc phosphate is more than 40%: 8-12 parts of iron oxide red: 11-14 parts.

Further: the iron oxide red adopts Langshan 148# iron oxide red.

Further: the modified toughened resin adopts flexible resin and has toughness and adhesion.

Further, the method comprises the following steps: the modified toughened resin adopts thermoplastic resin toughened epoxy resin.

Further: the barium sulfate is L-288 barium sulfate.

Further: the dispersant adopts an Effkona PF-502 type dispersant.

A preparation method of a two-component coating used on a JTS composite membrane is characterized by comprising the following steps:

preparation of component A:

the first step is as follows: adding NPEL128 epoxy resin, modified toughening resin, a dispersing agent, a boiling resistant auxiliary agent, organic bentonite, a thixotropic agent and a small amount of solvent into a stirring tank, and stirring at a high speed of 1200r/min for 20 min;

the second step is that: then adding the rust-proof pigment, barium sulfate, silicon micropowder and a small amount of solvent, and stirring at a high speed of 1200r/min for 30 min;

the third step: and pouring the mixture obtained by stirring into a sand mill for grinding at the grinding temperature of 40-50 ℃ until the grinding fineness reaches 35 mu m, and adding a solvent after grinding, wherein the weight ratio of xylene: the butanol is 7:3, the viscosity is adjusted to (coating a No. 4 cup) 80-100s, and then a component A is obtained after filtering by a 120-mesh filter screen;

preparation of component B:

uniformly stirring ZG-6019 cardanol curing agent, ZG-8013 active diluent and dimethylbenzene to obtain a component B:

when in use, the component A and the component B are mixed according to the weight ratio of the component A to the component B being 10: 1, stirring at normal temperature.

The invention has the advantages and positive effects that:

(1) the invention adopts the modified toughened resin to improve the flexibility and the adhesive force of the product, thereby meeting the requirements of various mechanical properties. The thickness of the film is controlled within the range of 30-50 mu m, the film can be quickly cured, has strong adhesive force with the JTS composite film, has good corrosion resistance, and can meet the matching of the JTS composite film with other coatings.

(2) According to the invention, through a large number of dispersant screening tests, the polyester modified high molecular compound, namely, the Effona-PF 502 is finally determined to be used as a dispersing auxiliary agent, and the application of the dispersing auxiliary agent improves the grinding efficiency of the product on one hand, effectively reduces the construction state of the product on the other hand, increases the fluidity of the product, and does not influence the sagging leveling property of the product.

(3) The boiling-resistant auxiliary agent is a silane coupling agent containing epoxy group and trimethoxy, is superior to a common silane coupling agent, has 100 percent of effective components, is zero in VOC, and does not contain heavy metal. The coating meets the requirements of low surface treatment and has the characteristics that: can be coated with oil, rust, water and old coating film, and can also be coated on JTS composite membrane.

Detailed Description

The invention is further illustrated by the following specific examples:

example 1:

a two-component coating used on a JTS composite membrane comprises a component A and a component B, wherein the component A is composed of the following raw materials in parts by weight:

NPEL128 epoxy resin: 30 parts (south Asia)

Modifying and toughening resin: 3 portions of

Dispersing agent: 0.2 part (model: PF-502, manufacturer: Effkona)

Boiling resistant auxiliary agent: 0.8 portion of

Organic bentonite: 0.4 portion of

Thixotropic agent: 0.3 part (type: MT, manufacturer: Tianjin Huanqi)

Zinc phosphate: 12 portions of

Iron oxide red: 14 portions of

Barium sulfate: 19 parts (L-288 barium sulfate, manufacturer: Shanghai Liweide)

Silicon micropowder: 5 portions of

Xylene: 10 portions of

Butanol: 5.3 parts of

And (B) component:

ZG-6019 Cardanol curing agent: 45 portions of

ZG-8013 reactive diluent: 10 portions of

Xylene: 45 portions of

The mass ratio of the component A to the component B is 10: 1.

the preparation method comprises the following steps:

preparation of component A: stirring and mixing firstly, then grinding, adding the solvent in small doses twice during stirring, and adding the solvent in large doses during viscosity adjustment after grinding, wherein the method specifically comprises the following steps:

the first step is as follows: adding NPEL128 epoxy resin, modified toughening resin, a dispersing agent, a boiling resistant auxiliary agent, organic bentonite, a thixotropic agent and a small amount of solvent into a stirring tank, and stirring at a high speed of 1200r/min for 20 min;

the second step is that: adding zinc phosphate, iron oxide red, barium sulfate, silica micropowder and a small amount of solvent, and stirring at high speed of 1200r/min for 30 min;

the third step: grinding the mixture obtained by stirring in a sand mill at the grinding temperature of 40-50 ℃ until the grinding fineness reaches 35 mu, adding a large amount of solvent, adjusting the viscosity to (coating in a No. 4 cup) 80-100s, and filtering by using a 120-mesh filter screen to obtain a component A;

preparation of component B:

uniformly stirring ZG-6019 cardanol curing agent, ZG-8013 active diluent and dimethylbenzene to obtain a component B:

when in use, the component A and the component B are mixed according to the weight ratio of the component A to the component B being 10: 1, stirring uniformly at normal temperature.

Example 2:

a two-component coating used on a JTS composite membrane comprises a component A and a component B, wherein the component A is composed of the following raw materials in parts by weight:

NPEL128 epoxy resin: 32 portions of

Modifying and toughening resin: 5 portions of

Dispersing agent: 0.3 part (model: PF-502, manufacturer: Effkona)

Boiling resistant auxiliary agent: 0.9 portion

Organic bentonite: 0.4 portion of

Thixotropic agent: 0.4 part (type: MT, manufacturer: Tianjin Huanqi)

Zinc phosphate: 8 portions of

Iron oxide red: 11 portions of

Barium sulfate: 18 portions of

Silicon micropowder: 7 portions of

Xylene: 14 portions of

Butanol: 3 portions of

And (B) component:

ZG-6019 Cardanol curing agent: 55 portions of

ZG-8013 reactive diluent: 5 portions of

Xylene: 40 portions of

The mass ratio of the component A to the component B is 10: 1.

the preparation method of the embodiment 2 is referred to the embodiment 1, and the description is omitted.

Example 3:

a two-component coating used on a JTS composite membrane comprises a component A and a component B, wherein the component A is composed of the following raw materials in parts by weight:

NPEL128 epoxy resin: 32 portions of

Modifying and toughening resin: 5 portions of

Dispersing agent: 0.3 part (model: PF-502, manufacturer: Effkona)

Boiling resistant auxiliary agent: 1.0 part

Organic bentonite: 0.4 portion of

Thixotropic agent: 0.4 part (type: MT, manufacturer: Tianjin Huanqi)

Zinc phosphate: 10 portions of

Iron oxide red: 12.5 portions

Barium sulfate: 17.5 parts of

Silicon micropowder: 5 portions of

Xylene: 12 portions of

Butanol: 3.9 parts of

And (B) component:

ZG-6019 Cardanol curing agent: 50 portions of

ZG-8013 reactive diluent: 10 portions of

Xylene: 40 portions of

The mass ratio of the component A to the component B is 10: 1.

the preparation method of the embodiment 3 is referred to the embodiment 1, and the description is omitted.

The two-component coating prepared in examples 1 to 3 was coated on the inner wall of a long-distance pipeline for performance testing, and the test results are shown in the following table:

the bi-component paint can be widely applied to a targeted anticorrosive coating system and is the only matched transition paint of JTS low-surface treatment paint. After the JTS low-surface treatment coating is adopted to form the composite membrane, the JTS low-surface treatment coating can be matched with various coatings for use

Although the embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the embodiments disclosed.