Production process of acid and alkali resistant double-component PU paint

Abstract

The invention discloses a production process of acid and alkali resistant double-component PU paint, and belongs to the technical field of paint paints.The production process of the acid and alkali resistant double-component PU paint comprises the specific implementation steps that firstly, raw materials of the double-component PU paint are screened and metered according to the mass ratio, the double-component PU paint comprises a component A and a component B, and the component B is prepared from a component A and a component B; wherein the component A is a main agent, and the component B is a curing agent; step 2, respectively proportioning the component A and the component B; and step 3, sealing the component A and the component B, respectively storing the component A and the component B in a sealing, dark and dark manner, and marking the sealing date and the shelf life during storage. The two-component PU paint with high stability can be formed, meanwhile, the two-component PU paint has good acid and alkali resistance, the PU paint can be used in a working plane or a working space with a large acidity value or alkalinity value, the using effect is guaranteed, and the service life is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of paints and coatings, and more specifically to a production process of an acid- and alkali-resistant two-component PU paint. Background Art

[0002] PU paint is a general term for all polyurethane coatings. It forms films naturally without special processes. In the use environment of PU paint, it has many practical advantages: (1) Compared with other paints, at the same hardness, due to the effect of hydrogen bonds, the elongation at break of PU paint film is the highest, so it is widely used in floor paint and deck paint; (2) PU paint has both protective and decorative properties, and can be used for the coating of high-end handicrafts, high-end wood products, pianos, large passenger aircraft, etc.; (3) PU paint has strong film adhesion and has excellent adhesion to a variety of surfaces.

[0003] At present, when PU paint is used on a working plane or working space with a high acidity or alkalinity value, long-term erosion by acidic or alkaline substances will cause the PU paint to separate from the working plane or working space, thereby affecting the practical effect of such PU paint on the working plane or working space with a high acidity or alkalinity value.

[0004] Therefore, in view of this, the existing structure is studied and improved, and a production process of an acid- and alkali-resistant two-component PU paint is provided, in order to achieve a more practical purpose. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a production process of acid- and alkali-resistant two-component PU paint, which can form a two-component PU paint with high stability. At the same time, the two-component PU paint has good acid and alkali resistance, and can realize the use of PU paint in working planes or working spaces with large acidity or alkalinity values, and ensure the use effect and extend the service life.

[0007] 2. Technical solution

[0008] To solve the above problems, the present invention adopts the following technical solutions.

[0009] A production process of acid- and alkali-resistant two-component PU paint, the specific implementation steps of the production process are as follows:

[0010] Step 1: Screen and measure the raw materials of two-component PU paint according to the mass ratio: the two-component PU paint includes component A and component B, wherein component A is the main agent and component B is the curing agent;

[0011] Component A is composed of the following mass ratios:

[0012]

[0013] Component B is composed of the following mass ratios:

[0014] 30-50 parts of butyl acetate

[0015] Isocyanate prepolymer 70-90 parts

[0016] Wherein, any raw material in component A and component B is filtered and screened, and impurities are discharged.

[0017] Step 2: Proportioning component A and component B respectively: According to the mass ratio of the raw materials of component A and component B in step 1, select clean and pollution-free stirring tanks respectively, and then proportion component A and component B respectively. During proportioning, the two stirring tanks are stirred by mechanical stirrers respectively until component A and component B are mixed evenly;

[0018] Step 3: Seal components A and B: Components A and B need to be sealed separately, stored in a dark place and away from light. When storing, mark the sealing date and shelf life. The mass ratio of component A to component B during storage is 2:1 or 1:1.

[0019] Furthermore, in the step 1, when measuring the mass ratio of component A to component B, the measuring needs to be performed after the filtering and screening are completed and the impurities are discharged.

[0020] Furthermore, in step 1, the raw material of component A is:

[0021] 30 parts of hydroxyl resin, 30 parts of alkyd polyurethane, 30 parts of polyester polyurethane, 30 parts of polyether polyurethane, 30 parts of epoxy polyurethane, 20 parts of polyamide resin, 20 parts of acrylic resin, 3 parts of dispersant, 2 parts of dissolving aid, 5 parts of matting powder;

[0022] The raw materials of component B are:

[0023] 30 parts of butyl acetate, 70 parts of isocyanate prepolymer;

[0024] The mass ratio of component A to component B is 2:1.

[0025] Furthermore, in step 1, the raw material of component A is:

[0026] 20 parts of hydroxyl resin, 20 parts of alkyd polyurethane, 20 parts of polyester polyurethane, 20 parts of polyether polyurethane, 20 parts of epoxy polyurethane, 15 parts of polyamide resin, 15 parts of acrylic resin, 3 parts of dispersant, 2 parts of dissolving aid, 5 parts of matting powder;

[0027] The raw materials of component B are:

[0028] 50 parts of butyl acetate, 90 parts of isocyanate prepolymer;

[0029] The mass ratio of component A to component B is 1:1.

[0030] Furthermore, in the step 1, the dispersant is selected from one of BASF EFKAPU 4010AN, Shi Rui SRE-42413 and Anjeka 6240.

[0031] Furthermore, in step 1, the dissolution aid is selected from one or more of xylene, diacetone alcohol, and propylene glycol methyl ether acetate.

[0032] Furthermore, in the step 1, the matting agent is Hongsheng S-401.

[0033] Furthermore, in the step 2, when the component A is mixed, the mixing time of the component A is not less than 5 minutes after the mixing is completed;

[0034] When mixing component B, continue to stir for no less than 4 minutes after the mixing of component B is completed.

[0035] 3. Beneficial effects

[0036] Compared with the prior art, the advantages of the present invention are:

[0037] In order to cope with the working plane or working space with a large acidity or alkalinity value, this scheme proposes a production process of acid- and alkali-resistant two-component PU paint. In this process, hydroxyl resin, alkyd polyurethane, polyester polyurethane, polyether polyurethane, and epoxy polyurethane are used as main materials, and a certain proportion of polyamide resin and acrylic resin are added as acid- and alkali-resistant additives. Then, dispersants, dissolving aids, and matting powder are used to blend the components to ensure that component A is blended evenly. Then, butyl acetate and isocyanate prepolymer in component B are used as curing agents. During construction, components A and B are mixed in a certain proportion to form a two-component PU paint with high stability. At the same time, the two-component PU paint has good acid and alkali resistance, which can realize the use of PU paint on working planes or working spaces with a large acidity or alkalinity value, and ensure the use effect and extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the production process of the present invention. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0040] Embodiment 1:

[0041] See also Figure 1 , a production process of acid and alkali resistant two-component PU paint, the specific implementation steps of this production process are as follows:

[0042] Step 1: Screen and measure the raw materials of two-component PU paint according to the mass ratio: the two-component PU paint includes component A and component B, wherein component A is the main agent and component B is the curing agent;

[0043] Component A is composed of the following mass ratios:

[0044]

[0045] Component B is composed of the following mass ratios:

[0046] 30-50 parts of butyl acetate

[0047] Isocyanate prepolymer 70-90 parts

[0048] Wherein, any raw material in component A and component B is filtered and screened, and impurities are discharged.

[0049] Polyamide resin and acrylic resin can adjust the composition of two-component PU paint and improve the acid and alkali resistance of two-component PU paint.

[0050] Specifically, when measuring the mass ratio of component A to component B, the measurement should be performed after filtering and screening and removing impurities. The measurement of component A and component B after removing impurities can better ensure the ratio of the fixing agent and the main agent of the final two-component adhesive.

[0051] Specifically, the raw materials of component A are:

[0052] 30 parts of hydroxyl resin, 30 parts of alkyd polyurethane, 30 parts of polyester polyurethane, 30 parts of polyether polyurethane, 30 parts of epoxy polyurethane, 20 parts of polyamide resin, 20 parts of acrylic resin, 3 parts of dispersant, 2 parts of dissolving aid, 5 parts of matting powder;

[0053] The raw materials of component B are:

[0054] 30 parts of butyl acetate, 70 parts of isocyanate prepolymer;

[0055] The mass ratio of component A to component B is 2:1.

[0056] Specifically, the dispersant is selected from one of BASF EFKAPU 4010AN, Shi Rui SRE-42413 and Anjeka6240.

[0057] BASF EFKAPU 4010AN is a high molecular weight coating dispersant suitable for industrial coatings and pigment concentrates, with the effect of preventing floating color; Shi Rui SRE-42413 is a solvent-based solid dispersant suitable for polyurethane inks, with good dispersing effect; Anjeka 6240 is a water-oil universal polyurethane dispersant, suitable for stabilizing carbon black and organic pigments. The corresponding dispersant can be selected according to the use location of the paint.

[0058] Specifically, the dissolving aid is selected from one or more of xylene, diacetone alcohol, and propylene glycol methyl ether acetate.

[0059] Specifically, the matting agent is Hongsheng S-401. Hongsheng S-401 has the advantages of easy dispersion, high matting efficiency, excellent transparency, and special black and fog.

[0060] Step 2: Proportioning component A and component B respectively: According to the mass ratio of the raw materials of component A and component B in step 1, select clean and pollution-free stirring tanks respectively, and then proportion component A and component B respectively. During proportioning, the two stirring tanks are stirred by mechanical stirrers respectively until component A and component B are mixed evenly;

[0061] Step 3: Seal components A and B: Components A and B need to be sealed separately, stored in a dark place and away from light. When storing, mark the sealing date and shelf life. The mass ratio of component A to component B during storage is 2:1 or 1:1.

[0062] Specifically, when mixing component A, the mixing time after component A is completed is not less than 5 minutes;

[0063] When mixing component B, continue to stir for no less than 4 minutes after the mixing of component B is completed.

[0064] Ensure that components A and B are evenly mixed after stirring.

[0065] Combining the above steps, the produced two-component PU is particularly highly stable. At the same time, the two-component PU paint has good acid and alkali resistance, which can enable the use of PU paint on working planes or working spaces with high acidity or alkalinity values, and ensure the use effect and extend the service life.

[0066] Embodiment 2:

[0067] Based on the above embodiment 1, further description is given.

[0068] When proportioning component A and component B, the mass ratio of component A and component B can be adjusted;

[0069] The raw materials of component A are:

[0070] 20 parts of hydroxyl resin, 20 parts of alkyd polyurethane, 20 parts of polyester polyurethane, 20 parts of polyether polyurethane, 20 parts of epoxy polyurethane, 15 parts of polyamide resin, 15 parts of acrylic resin, 3 parts of dispersant, 2 parts of dissolving aid, 5 parts of matting powder;

[0071] The raw materials of component B are:

[0072] 50 parts of butyl acetate, 90 parts of isocyanate prepolymer;

[0073] The mass ratio of component A to component B is 1:1.

[0074] Embodiment 3:

[0075] Based on the above-mentioned Embodiment 1 and Embodiment 2, further description is given.

[0076] Mix and prepare two-component paint: the mixing ratio of component A and component B is 1: (0.5-1). The specific steps are as follows:

[0077] Pour component A into a measuring cup and place it on a magnetic stirrer for 3-5 minutes.

[0078] Add component B in proportion and continue stirring for 8 to 10 minutes.

[0079] Pass through 400 mesh filter gauze and funnel, put into the pressure equipment specially used for construction, and let it stand for 3-5 minutes to enter the construction state.

[0080] Stirring component A and component B separately again can ensure the uniformity of component A and component B before mixing, and avoid the precipitation of some raw materials affecting the final paint effect.

[0081] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A production process of acid and alkali resistant two-component PU paint, characterized in that: The specific implementation steps of this production process are as follows: Step 1: Screen and measure the raw materials of two-component PU paint according to the mass ratio: the two-component PU paint includes component A and component B, wherein component A is the main agent and component B is the curing agent; Component A is composed of the following mass ratios: Component B is composed of the following mass ratios: 30-50 parts of butyl acetate Isocyanate prepolymer 70-90 parts Wherein, any raw material in component A and component B is filtered and screened, and impurities are discharged; Step 2: Proportioning component A and component B respectively: According to the mass ratio of the raw materials of component A and component B in step 1, select clean and pollution-free stirring tanks respectively, and then proportion component A and component B respectively. During proportioning, the two stirring tanks are stirred by mechanical stirrers respectively until component A and component B are mixed evenly; Step 3: Seal components A and B: Components A and B need to be sealed separately, stored in a dark place and away from light. When storing, mark the sealing date and shelf life. The mass ratio of component A to component B during storage is 2:1 or 1:

1.

2. The production process of an acid- and alkali-resistant two-component PU paint according to claim 1, characterized in that: In the step 1, when measuring the mass ratio of component A to component B, the measuring needs to be done after the filtration and screening are completed and the impurities are discharged.

3. The production process of an acid- and alkali-resistant two-component PU paint according to claim 1, characterized in that: In the step 1, the raw material of component A is: 30 parts of hydroxyl resin, 30 parts of alkyd polyurethane, 30 parts of polyester polyurethane, 30 parts of polyether polyurethane, 30 parts of epoxy polyurethane, 20 parts of polyamide resin, 20 parts of acrylic resin, 3 parts of dispersant, 2 parts of dissolving aid, 5 parts of matting powder; The raw materials of component B are: 30 parts of butyl acetate, 70 parts of isocyanate prepolymer; The mass ratio of component A to component B is 2:

1.

4. The production process of an acid- and alkali-resistant two-component PU paint according to claim 1, characterized in that: In the step 1, the raw material of component A is: 20 parts of hydroxyl resin, 20 parts of alkyd polyurethane, 20 parts of polyester polyurethane, 20 parts of polyether polyurethane, 20 parts of epoxy polyurethane, 15 parts of polyamide resin, 15 parts of acrylic resin, 3 parts of dispersant, 2 parts of dissolving aid, 5 parts of matting powder; The raw materials of component B are: 50 parts of butyl acetate, 90 parts of isocyanate prepolymer; The mass ratio of component A to component B is 1:

1.

5. The production process of an acid- and alkali-resistant two-component PU paint according to claim 1, characterized in that: In the step 1, the dispersant is selected from one of BASF EFKA PU 4010AN, Shi Rui SRE-42413 and Anjeka 6240.

6. The production process of an acid- and alkali-resistant two-component PU paint according to claim 1, characterized in that: In the step 1, the dissolving aid is selected from one or more of xylene, diacetone alcohol, and propylene glycol methyl ether acetate.

7. The production process of an acid- and alkali-resistant two-component PU paint according to claim 1, characterized in that: In the step 1, the matting agent is Hongsheng S-401.

8. The production process of an acid- and alkali-resistant two-component PU paint according to claim 1, characterized in that: In the step 2, when the component A is mixed, the mixing time of the component A is not less than 5 minutes after the mixing is completed; When mixing component B, continue to stir for no less than 4 minutes after the mixing of component B is completed.

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