Moisture-proof impregnated paper and its production process

Abstract

The present application relates to the technical field of impregnated paper, and proposes a moisture-proof impregnated paper and a production process thereof.The moisture-proof impregnated paper comprises a base paper substrate and an impregnated glue.The impregnated glue comprises A component and B component.The A component comprises the following raw materials in parts by weight: polyurethane modified epoxy resin 20-45 parts, epoxy modified acrylic resin 20-45 parts, curing agent 8-16 parts, defoaming agent 0.05-0.1 part, and toughening agent 2-3 parts.The B component comprises the following raw materials in parts by weight: polyamide wax 4-8 parts, nano-particle 2-3 parts, emulsifier 0.5-0.8 part, coupling agent 0.2-0.5 part, and organic solvent 30-40 parts.The nano-particle is silicon dioxide and / or titanium dioxide.Through the above technical solution, the problem of poor moisture resistance of the impregnated paper in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of impregnated paper technology, specifically to a moisture-proof impregnated paper and its production process. Background Technology

[0002] With the rapid development of the economy, impregnated paper is widely used in various building decorations, furniture manufacturing and equipment shells. In particular, it is widely used as decorative paper in the production and processing of decorative panels. It is a kind of film paper with a certain resin content and volatile matter content, which is obtained by impregnating plain paper or printed paper with resin and drying it. After hot pressing, it is bonded to the substrate board to make decorative panels with excellent surface performance and beautiful patterns.

[0003] However, existing impregnated paper still has poor moisture resistance and is prone to absorbing moisture, which leads to a series of problems such as cracking and bubbling, affecting the service life of the impregnated paper. Summary of the Invention

[0004] This invention proposes a moisture-proof impregnated paper and its production process, which solves the problem of poor moisture resistance of impregnated paper in related technologies.

[0005] The technical solution of the present invention is as follows:

[0006] This invention proposes a moisture-proof impregnated paper, comprising a base paper substrate and an impregnating adhesive; the impregnating adhesive comprises component A and component B;

[0007] Component A comprises the following raw materials in parts by weight: 20-45 parts of polyurethane modified epoxy resin, 20-45 parts of epoxy modified acrylic resin, 8-16 parts of curing agent, 0.05-0.1 parts of defoamer, and 2-3 parts of toughening agent;

[0008] Component B comprises the following raw materials in parts by weight: 4-8 parts polyamide wax, 2-3 parts nanoparticles, 0.5-0.8 parts emulsifier, 0.2-0.5 parts coupling agent, and 30-40 parts organic solvent;

[0009] The nanoparticles are silicon dioxide and / or titanium dioxide.

[0010] As a further technical solution, the mass ratio of component B to component A is 1:3~8.

[0011] As a further technical solution, the mass ratio of the polyurethane-modified epoxy resin to the epoxy-modified acrylic resin is 3:2~7.

[0012] In this invention, the moisture resistance of the impregnating adhesive is further improved by optimizing the mass ratio of polyurethane-modified epoxy resin and epoxy-modified acrylic resin in the impregnating adhesive.

[0013] As a further technical solution, when the nanoparticles are silicon dioxide and titanium dioxide, the mass ratio of silicon dioxide to titanium dioxide is 4:1~6.

[0014] In this invention, when the nanoparticles are silicon dioxide and titanium dioxide, and their mass ratio is 4:1 to 6, the moisture resistance of the impregnating adhesive is further improved.

[0015] As a further technical solution, the preparation method of component B includes the following steps: ball milling and mixing the coupling agent and nanoparticles, and then adding them to the mixture of the remaining components to obtain component B.

[0016] As a further technical solution, the preparation method of the impregnating adhesive includes the following steps: mixing the raw materials of component B and component A to obtain the impregnating adhesive.

[0017] As a further technical solution, the curing agent is one of dimethylaminopropylamine and N-hydroxyethyl ethylenediamine; the defoamer is one of dimethyl silicone oil and phenylacetic acid lauryl ester; and the toughening agent is one of CMP-410 and MX-257.

[0018] As a further technical solution, the organic solvent is one or more of n-propanol, N-methylpyrrolidone, and alkylbenzene; the coupling agent is a silane coupling agent.

[0019] The present invention also proposes a production process for the moisture-proof impregnated paper, comprising the following steps: applying the impregnating adhesive to the upper surface of the base paper substrate and curing it to obtain the moisture-proof impregnated paper.

[0020] As a further technical solution, the coating amount of the impregnating adhesive is 10~15g / m². 2 .

[0021] The working principle and beneficial effects of this invention are as follows:

[0022] 1. In this invention, the impregnating colloid of the moisture-proof impregnating paper is made of polyurethane modified epoxy resin and epoxy modified acrylic resin compounded to form a denser network space. At the same time, the B component of the impregnating colloid is made of silica and / or titanium dioxide nanoparticles dispersed in polyamide wax, so that the nanoparticles fill the gaps in the impregnating colloid and are more evenly distributed, increasing the bonding strength with the impregnating colloid and significantly improving the moisture-proof properties of the moisture-proof impregnating paper. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] In the following examples and comparative examples, the epoxy equivalent of the polyurethane-modified epoxy resin is 235~270 g / eq; the epoxy-modified acrylic resin is kpl-12365 with a viscosity of 5000~7000 mPa.s; the dimethylaminopropylamine is HS-463; the average particle size of titanium dioxide is 25 nm; the particle size of silica is 5000 mesh; and the polyamide wax is PA-8700.

[0025] Example 1

[0026] Moisture-proof impregnated paper includes a base paper substrate and an impregnating colloid; the impregnating colloid includes component A and component B; the mass ratio of component B to component A is 1:3;

[0027] Component A comprises the following raw materials in parts by weight: 20 parts polyurethane modified epoxy resin, 20 parts epoxy modified acrylic resin, 8 parts dimethylaminopropylamine, 0.05 parts lauryl phenylacetate, and 2 parts toughening agent MX-257.

[0028] Component B comprises the following raw materials in parts by weight: 4 parts polyamide wax, 2 parts titanium dioxide, 0.5 parts sorbitol fatty acid ester, 0.2 parts silane coupling agent KH550, and 30 parts n-propanol;

[0029] The preparation method of component B includes the following steps: ball milling and mixing silane coupling agent KH550 and titanium dioxide, and then adding them to the mixture of the remaining components to obtain component B;

[0030] The method for preparing the impregnating adhesive includes the following steps: mixing the raw materials of component B and component A to obtain the impregnating adhesive;

[0031] The production process of moisture-proof impregnated paper includes the following steps: applying impregnation adhesive to the surface of the base paper substrate and curing it to obtain moisture-proof impregnated paper.

[0032] Example 2

[0033] Moisture-proof impregnated paper includes a base paper substrate and an impregnating colloid; the impregnating colloid includes component A and component B; the mass ratio of component B to component A is 1:5;

[0034] Component A comprises the following raw materials in parts by weight: 35 parts polyurethane modified epoxy resin, 35 parts epoxy modified acrylic resin, 12 parts N-hydroxyethyl ethylenediamine, 0.07 parts dimethyl silicone oil, and 2.5 parts toughening agent CMP-410;

[0035] Component B comprises the following raw materials in parts by weight: 6 parts polyamide wax, 2.5 parts silica, 0.7 parts sorbitol fatty acid ester, 0.4 parts silane coupling agent KH550, and 35 parts methylpyrrolidone;

[0036] The preparation method of component B includes the following steps: ball milling and mixing silane coupling agent KH550 and silica, and then adding them to the mixture of the remaining components to obtain component B;

[0037] The method for preparing the impregnating adhesive includes the following steps: mixing the raw materials of component B and component A to obtain the impregnating adhesive;

[0038] The production process of moisture-proof impregnated paper includes the following steps: applying impregnation adhesive to the surface of the base paper substrate and curing it to obtain moisture-proof impregnated paper.

[0039] Example 3

[0040] Moisture-proof impregnated paper includes a base paper substrate and an impregnating colloid; the impregnating colloid includes component A and component B; the mass ratio of component B to component A is 1:8;

[0041] Component A comprises the following raw materials in parts by weight: 45 parts polyurethane modified epoxy resin, 45 parts epoxy modified acrylic resin, 16 parts dimethylaminopropylamine, 0.1 parts dimethyl silicone oil, and 3 parts toughening agent CMP-410.

[0042] Component B comprises the following raw materials in parts by weight: 8 parts polyamide wax, 3 parts silica, 0.8 parts sorbitol fatty acid ester, 0.5 parts silane coupling agent KH550, 10 parts n-propanol, and 30 parts N-methylpyrrolidone.

[0043] The preparation method of component B includes the following steps: ball milling and mixing silane coupling agent KH550 and silica, and then adding them to the mixture of the remaining components to obtain component B;

[0044] The method for preparing the impregnating adhesive includes the following steps: mixing the raw materials of component B and component A to obtain the impregnating adhesive;

[0045] The production process of moisture-proof impregnated paper includes the following steps: applying impregnation adhesive to the surface of the base paper substrate and curing it to obtain moisture-proof impregnated paper.

[0046] Example 4

[0047] The only difference between this embodiment and Embodiment 3 is that in component A, there are 18 parts of polyurethane-modified epoxy resin and 72 parts of epoxy-modified acrylic resin.

[0048] Example 5

[0049] The only difference between this embodiment and Embodiment 3 is that in component A, there are 36 parts of polyurethane-modified epoxy resin and 54 parts of epoxy-modified acrylic resin.

[0050] Example 6

[0051] The only difference between this embodiment and Embodiment 3 is that in component A, the polyurethane-modified epoxy resin is 22.5 parts and the epoxy-modified acrylic resin is 67.5 parts.

[0052] Example 7

[0053] The only difference between this embodiment and Embodiment 6 is that silicon dioxide is replaced with an equal mass of titanium dioxide.

[0054] Example 8

[0055] The only difference between this embodiment and Embodiment 6 is that 0.3 parts of silicon dioxide in component B are replaced with titanium dioxide.

[0056] Example 9

[0057] The only difference between this embodiment and Embodiment 6 is that 1.9 parts of silicon dioxide in component B are replaced with titanium dioxide.

[0058] Example 10

[0059] The only difference between this embodiment and Embodiment 6 is that 0.6 parts of silicon dioxide in component B are replaced with titanium dioxide.

[0060] Example 11

[0061] The only difference between this embodiment and Embodiment 6 is that 1.8 parts of silicon dioxide in component B are replaced with titanium dioxide.

[0062] Comparative Example 1

[0063] The only difference between this embodiment and Embodiment 3 is that silicon dioxide is not added to component B.

[0064] Comparative Example 2

[0065] The only difference between this embodiment and Embodiment 3 is that polyamide wax is not added to component B.

[0066] Comparative Example 3

[0067] The only difference between this embodiment and Embodiment 3 is that component B is not added to the impregnating adhesive.

[0068] Comparative Example 4

[0069] The only difference between this embodiment and Embodiment 3 is that the polyurethane-modified epoxy resin in component A is replaced with an equal mass of epoxy-modified acrylic resin.

[0070] Comparative Example 5

[0071] The only difference between this embodiment and Embodiment 3 is that the epoxy-modified acrylic resin in component A is replaced with an equal mass of polyurethane-modified epoxy resin.

[0072] The moisture-proof impregnated papers prepared in Examples 1-11 and Comparative Examples 1-5 were weighed and recorded as the initial mass of the impregnated paper. They were then soaked in a water bath at 30°C for 48 hours, removed, and weighed after wiping off surface water. This weight was recorded as the mass of the impregnated paper after soaking. The water absorption rate of each example and comparative example was calculated as follows: Water absorption rate = [(mass of impregnated paper after soaking - initial mass of impregnated paper) / initial mass of impregnated paper] × 100%. The calculation results are shown in the table below.

[0073]

[0074] By comparing the data of Examples 1-11 and Comparative Examples 1-5, it was found that the moisture-proof impregnated paper prepared in Examples 1-11 had a lower water absorption rate compared with Comparative Examples 1-5. This indicates that the impregnating adhesive uses a combination of polyurethane-modified epoxy resin and epoxy-modified acrylic resin to form a denser network space. At the same time, the B component of the impregnating adhesive is dispersed in polyamide wax using silica and / or titanium dioxide nanoparticles, which can significantly improve the moisture-proof properties of the moisture-proof impregnated paper.

[0075] By comparing the data from Examples 3 to 6, it was found that the moisture-proof impregnated paper prepared in Examples 5 to 6 had a lower water absorption rate compared with Examples 3 to 4. This indicates that by optimizing the mass ratio of polyurethane-modified epoxy resin and epoxy-modified acrylic resin, the moisture-proof properties of the impregnating adhesive can be further improved.

[0076] By comparing the data of Examples 3 and 7-11, it was found that the moisture-proof impregnated paper prepared in Examples 10-11 had a lower water absorption rate compared with Examples 3 and 7-9. This indicates that when the nanoparticles are silicon dioxide and titanium dioxide and the mass ratio of the two is 4:1-6, the moisture-proof properties of the impregnating adhesive can be further improved.

[0077] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A moisture-proof impregnated paper, characterized in that, It includes a base paper substrate and an impregnating colloid; the impregnating colloid includes component A and component B; Component A comprises the following raw materials in parts by weight: 20-45 parts of polyurethane modified epoxy resin, 20-45 parts of epoxy modified acrylic resin, 8-16 parts of curing agent, 0.05-0.1 parts of defoamer, and 2-3 parts of toughening agent; Component B comprises the following raw materials in parts by weight: 4-8 parts polyamide wax, 2-3 parts nanoparticles, 0.5-0.8 parts emulsifier, 0.2-0.5 parts coupling agent, and 30-40 parts organic solvent; The nanoparticles are silicon dioxide and titanium dioxide in a mass ratio of 4:1~6; The mass ratio of component B to component A is 1:3~8; The preparation method of component B includes the following steps: ball milling and mixing the coupling agent and nanoparticles, and then adding them to the mixture of the remaining components to obtain component B.

2. The moisture-proof impregnated paper according to claim 1, characterized in that, The mass ratio of the polyurethane-modified epoxy resin to the epoxy-modified acrylic resin is 2:3~6.

3. The moisture-proof impregnated paper according to claim 1, characterized in that, The method for preparing the impregnating adhesive includes the following steps: mixing the raw materials of component B and component A to obtain the impregnating adhesive.

4. The moisture-proof impregnated paper according to claim 1, characterized in that, The curing agent is one of dimethylaminopropylamine and N-hydroxyethyl ethylenediamine; the defoamer is one of dimethyl silicone oil and phenylacetic acid lauryl ester; the toughening agent is one of CMP-410 and MX-257; and the emulsifier is sorbitol fatty acid ester emulsifier.

5. The moisture-proof impregnated paper according to claim 1, characterized in that, The organic solvent is one or more of n-propanol, N-methylpyrrolidone, and alkylbenzene; the coupling agent is a silane coupling agent.

6. The production process of a moisture-proof impregnated paper according to any one of claims 1 to 5, characterized in that, Includes the following steps: The impregnating adhesive is applied to the upper surface of the base paper substrate and cured to obtain moisture-proof impregnated paper.

7. The production process of a moisture-proof impregnated paper according to claim 6, characterized in that, The coating amount of the impregnating adhesive is 10~15g / m². 2 .

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