An experimental device applied to development of TDI-HDI composite water-based curing agent

Abstract

This utility model discloses an experimental apparatus for the research and development of TDI-HDI composite waterborne curing agents, belonging to the field of coatings. It includes an experimental platform equipped with a heating device, a separation device, and a collection hood. An evaporating dish is mounted on the heating device, and the collection hood covers the evaporating dish, with a collection tube installed on the collection hood. The separation device includes a condensation chamber and an isolation chamber located at the center of the condensation chamber. The isolation chamber and the condensation chamber form an inner cavity and an outer cavity, respectively. The other end of the collection tube passes upwards from the bottom of the isolation chamber and communicates with the inner cavity. At least one separation plate with uniformly distributed micropores is installed inside the inner cavity. This utility model can quantitatively analyze the volatile organic components in TDI-HDI composite waterborne curing agents.

Description

Technical Field

[0001] This utility model relates to the field of coatings, and more specifically, to an experimental apparatus for the research and development of TDI-HDI composite waterborne curing agents. Background Technology

[0002] TDI-HDI composite waterborne curing agent is a waterborne polyurethane curing agent that combines the properties of toluene diisocyanate (TDI) and hexamethylene diisocyanate (HDI). It combines the rigid structure of TDI with the flexibility of HDI, possessing both good mechanical properties and weather resistance, balancing curing speed and application performance. Therefore, it exhibits good storage stability, compatibility with various waterborne resins, and adjustable curing speed. Although TDI-HDI composite waterborne curing agent is water-based, it still contains a certain amount of volatile organic components due to monomer residues, solvent residues, neutralizing agent volatiles, and additives.

[0003] Although TDI-HDI composite waterborne curing agents have good performance, with the continuous upgrading of environmental regulations due to stricter VOC restrictions and bans on harmful substances, as well as performance defects such as insufficient hydrolysis resistance, contradiction between curing speed and stability, and poor low-temperature curing performance, there is a need for in-depth research and development of TDI-HDI composite waterborne curing agents.

[0004] In the research and development of DI-HDI composite waterborne curing agents, it is necessary to accurately determine the content of each substance, including volatile components. However, the existing testing methods are mainly based on GB / T 1725 "Determination of Non-volatile Content in Paints, Varnishes and Plastics". However, this method can only quantitatively analyze the content of volatile components in DI-HDI composite waterborne curing agents, but cannot quantitatively analyze the content of organic volatile components and water. Utility Model Content

[0005] To address the aforementioned problems, this invention provides an experimental apparatus for the research and development of TDI-HDI composite water-based curing agents. This experimental apparatus aims to improve at least one of the problems mentioned in the background art.

[0006] An experimental apparatus for the research and development of TDI-HDI composite waterborne curing agents includes an experimental platform. The experimental platform is equipped with a heating device, a separation device, and a collection hood. An evaporating dish is placed on the heating device. The collection hood covers the evaporating dish and is equipped with a collection tube. The separation device includes a condensation box and an isolation box located at the center of the condensation box. The isolation box and the condensation box form an inner cavity and an outer cavity. The other end of the collection tube passes through the bottom of the isolation box upward and communicates with the inner cavity. At least one separation plate with uniform micropores is installed in the inner cavity.

[0007] Optionally, the heating device is an electric heating plate.

[0008] Optionally, the number of separation plates corresponds to the types of volatile organic components, and the micropores of adjacent separation plates are staggered.

[0009] Optionally, the outer cavity is provided with several layers of partition plates from top to bottom, dividing the outer cavity into several partition chambers from top to bottom, and each partition chamber is filled with cold matter at different temperatures.

[0010] Optionally, the isolation plate and the separation plate are staggered.

[0011] Optionally, the pore size of the micropore is 10μm to 15μm, and the distance between two adjacent micropores is 40μm to 50m.

[0012] Optionally, the collection hood seals the evaporating dish inside.

[0013] Optionally, the collection tube is wrapped with an insulation layer.

[0014] Optionally, the collection cover is provided with a transparent observation window.

[0015] Optionally, the inner wall of the isolation box is symmetrically provided with two concave slides, the separation plate is provided with a slide bar that can move up and down in the slides, and the inner wall of the isolation box is also provided with several baffles that are fixed at one end and detachable at the other end. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the separation plate structure of this utility model;

[0019] Figure 3 This is a schematic diagram showing the positional relationship between the slide rail, slide bar, and baffle of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Experimental table, 2. Heating device, 3. Evaporating dish, 4. Separation device, 5. Collection hood, 6. Collection tube, 7. Condensation box, 8. Isolation box, 9. Inner cavity, 10. Outer cavity, 11. Separation plate, 12. Isolation plate, 13. Slide rail, 14. Slide bar, 15. Baffle. Detailed Implementation

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, "a plurality of" means two or more, unless otherwise precisely specified.

[0023] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0026] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the overall structure of this utility model. Figure 2 This is a schematic diagram of the separation plate structure of this utility model. Figure 3 This is a schematic diagram showing the positional relationship between the slide rail, slide bar, and baffle of this utility model.

[0027] An experimental apparatus for the research and development of TDI-HDI composite waterborne curing agents includes an experimental platform 1. The experimental platform 1 is equipped with a heating device 2, a separation device 4, and a collection hood 5. An evaporating dish 3 is installed on the heating device 2. The collection hood 5 covers the evaporating dish 3 and is equipped with a collection pipe 6. The separation device 4 includes a condensation box 7 and an isolation box 8 located at the center of the condensation box 7. The isolation box 8 and the condensation box 7 form an inner cavity 9 and an outer cavity 10. The other end of the collection pipe 6 passes upward from the bottom of the isolation box 8 and communicates with the inner cavity 9. At least one separation plate 11 with uniform micropores is installed in the inner cavity 9.

[0028] When quantitative analysis of the volatile components of DI-HDI composite water-based curing agent is required by setting up a heating device 2, a separation device 4, and a collection hood 5, a quantitative amount of DI-HDI composite water-based curing agent is placed in an evaporating dish 3, the heating device is turned on to evaporate the volatile components, the collection hood 5 collects the evaporated volatile components, and the collection tube 6 introduces the volatile components collected by the collection hood 5 into the inner cavity 9 from the bottom of the isolation box 8. The outer cavity 10 is filled with a refrigerant. Since the inner cavity 9 is surrounded by the outer cavity 10, the refrigerant separates the volatile components in the inner cavity 9, thereby obtaining a quantitative amount of volatile components. Since the organic volatile components in the DI-HDI composite water-based curing agent crystallize into solids at low temperatures (e.g., the refrigerant is an ice-water mixture) and adhere to the separation plate 11, the amount of water and organic volatile components can be distinguished by weighing the increase in weight of the separation plate 11.

[0029] In one or more specific embodiments of this utility model, the heating device 2 can be an electric heating plate or other heaters that can evaporate the volatile components of the TDI-HDI composite water-based curing agent, without any particular limitation.

[0030] In one or more specific embodiments of this utility model, in order to distinguish different organic volatile components, the number of separation plates 11 matches the types of organic volatile components, and the micropores of adjacent separation plates 11 are staggered to achieve better separation.

[0031] In one or more specific embodiments of this utility model, the pore size of the micropore is 10μm to 15μm, and the distance between two adjacent micropores is 40μm to 50m.

[0032] In one or more specific embodiments of this utility model, in order to obtain better quantitative analysis results, several layers of isolation plates 12 are arranged from top to bottom inside the outer cavity 10. By setting several layers of isolation plates 12, the outer cavity 10 is divided into several isolation chambers from top to bottom. The temperature of the cold matter in each isolation chamber is different, and the temperature of the cold matter gradually increases from top to bottom. At this time, the cold matter in the highest isolation chamber is a mixture of ice and water, so that the crystals of the evaporated gas are different in different separation plates 11, and the organic volatile components with different crystallization temperatures are separated.

[0033] In one or more specific embodiments of this utility model, in order to obtain better quantitative analysis results, the isolation plate 12 and the separation plate 11 are staggered.

[0034] In one or more specific embodiments of this utility model, in order to make the analysis results more accurate, the collection hood 5 seals the evaporating dish 3 inside to prevent the evaporated gas from escaping from the non-collection tube 6.

[0035] In one or more specific embodiments of this utility model, in order to make the analysis results more accurate, the collection tube 6 is wrapped with a heat insulation layer (not shown in the figure) to prevent volatile organic components from crystallizing and remaining in the collection tube 6.

[0036] In one or more specific embodiments of this utility model, in order to observe the volatilization of the sample being tested, a transparent observation window (not shown in the figure) is provided on the collection cover 5. The location of the transparent observation window can be set by those skilled in the art as needed, as long as the volatilization of the sample being tested can be observed, and no special limitation is made here.

[0037] In one or more specific embodiments of this utility model, in order to facilitate the removal of the separation plate 11, two concave slides 13 are symmetrically arranged on the inner wall of the isolation box 8, and the separation plate 11 is provided with a slide bar 14 that can move up and down in the slides 13.

[0038] In one or more specific embodiments of this utility model, in order to facilitate fixing the separation plate 11 at a specific height, a plurality of baffles 15, one end of which is fixed and the other end is detachable, are also provided on the inner wall of the isolation box 8. When the separation plate 11 is moved to the position that needs to be fixed, it stops moving and the unfixed end of the baffle 15 is fixed to prevent the separation plate 11 from falling.

[0039] Those skilled in the art should know that in this invention, the constant temperature of the cold mass in the isolation chamber can be achieved by setting up cold mass inlet and outlet pipes. Those skilled in the art can set this up as needed, without needing to make any creative effort.

[0040] In this invention, when it is necessary to test other samples, it is only necessary to collect the sample in the evaporating dish 3 and place the sample in the evaporating dish 5.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An experimental device applied to the development of a TDI-HDI composite water-based curing agent, characterized in that, The experimental platform (1) is equipped with a heating device (2), a separation device (4) and a collection hood (5). An evaporating dish (3) is placed on the heating device (2). The collection hood (5) covers the evaporating dish (3) and a collection tube (6) is installed on the collection hood (5). The separation device (4) includes a condenser (7) and an isolation box (8) located at the center of the condenser (7). The isolation box (8) and the condenser (7) form an inner cavity (9) and an outer cavity (10). The other end of the collection tube (6) passes through the bottom of the isolation box (8) and communicates with the inner cavity (9). At least one separation plate (11) with uniform micropores is installed in the inner cavity (9).

2. The experimental device for developing a TDI-HDI composite type water-based curing agent according to claim 1, characterized in that, The heating device (2) is an electric heating plate. 3.The experimental device for developing TDI-HDI composite water-based curing agent according to claim 1, wherein, The number of separation plates (11) corresponds to the types of volatile organic components, and the micropores of adjacent separation plates (11) are staggered. 4.The experimental device for developing TDI-HDI composite water-based curing agent according to claim 3, characterized in that, The outer cavity (10) is provided with several layers of isolation plates (12) from top to bottom, dividing the outer cavity (10) into several isolation chambers from top to bottom, and each isolation chamber is filled with cold matter at different temperatures. 5.The experimental device for developing TDI-HDI composite water-based curing agent according to claim 4, wherein, The isolation plate (12) and the separation plate (11) are misaligned. 6.The experimental device for developing TDI-HDI composite water-based curing agent according to claim 1, wherein, The pore size of the micropores is 10μm to 15μm, and the distance between two adjacent micropores is 40μm to 50m.

7. The experimental device for the development of TDI-HDI composite water-based curing agent according to claim 1, characterized in that, The collection cover (5) seals the evaporating dish (3) inside. 8.The experimental device for developing TDI-HDI composite water-based curing agent according to claim 1, wherein, The collection tube (6) is wrapped with an insulation layer. 9.The experimental device for developing TDI-HDI composite water-based curing agent according to claim 1, wherein, The collection cover (5) is provided with a transparent observation window. 10.The experimental device for developing TDI-HDI composite water-based curing agent according to claim 1, wherein, The inner wall of the isolation box (8) is symmetrically provided with two concave slides (13), and the separation plate (11) is provided with a slide bar (14) that can move up and down in the slide (13). The inner wall of the isolation box (8) is also provided with several baffles (15) that are fixed at one end and detachable at the other end.

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