Glue for filling electric blanket junction box

Abstract

The invention provides an adhesive for filling an electric blanket junction box. The adhesive is prepared from the following raw materials in parts by weight: 70-80 parts of modified epoxy resin, 1-9 parts of a curing agent, 1-2 parts of a defoaming agent, 0.5-3 parts of filler, 20-32 parts of a coalescing agent, 0.5-2 parts of an adhesive retaining agent and 0.5-2 parts of a dispersing agent, the preparation method comprises the following steps: 1, stirring modified epoxy resin, a defoaming agent, a glue retaining agent and a dispersing agent in vacuum at 60 DEG C to obtain a mixture A; 2, mixing the curing agent, the filler and the coalescing agent to obtain a mixture B; and 3, mixing the mixture A and the mixture B at 90 DEG C for 20 minutes, uniformly stirring, and defoaming to obtain the filling adhesive. According to the filling adhesive disclosed by the invention, more light energy is concentrated, so that the collision opportunity of epoxy resin molecules is increased during curing, the light curing time is shortened, the crosslinking density of epoxy resin is increased, and the light curing depth is increased.

Description

Technical Field

[0001] The invention belongs to the field of glue, in particular to a glue for filling an electric blanket junction box. Background Art

[0002] The glue in the wire box of the electric blanket is usually an epoxy resin glue, and some manufacturers also use polyurethane or silicone rubber materials. The glue in the wire box of the electric blanket has the following two main functions: 1. Fix the wires; the glue can firmly fix the wires in the wire box to prevent the wires from loosening or falling off during use, thereby ensuring the normal use of the electrical equipment. 2. Prevent leakage; another important function of the glue is to prevent the wires from being exposed, ensuring that the wires will not come into contact with the outside world and cause leakage accidents.

[0003] This glue is mainly used to fix the wires, ensure the electrical connection of the wires is reliable, and prevent the wires from being exposed and causing leakage, playing an important protective role. In the electric blanket junction box, the wires and cables need to be connected and protected. The glue can be used to seal the connection to prevent external moisture and dust from entering the junction box, thereby improving the safety of operation. In addition, the glue can also protect the wires from being cut, broken or otherwise damaged.

[0004] Among them, hot melt glue, silicone or epoxy resin glue are usually used. Hot melt glue is a hot melt agent that needs to be melted at high temperature and then applied to the wires in the junction box. Once cooled, it hardens and fixes the wires; silicone is a high temperature and impact resistant sealing material. It can avoid oxidation and corrosion and provide additional protection for the wires. Silicone will not stick to the wires; epoxy resin glue is a two-component chemical that can be mixed to form a hard material. Epoxy resin glue can not only seal the wires, but also protect them from squeezing and bending. This glue needs to be mixed in the right proportion to achieve the best effect. Usually, if the proportion is improper, the glue will crack due to excessive stress caused by curing shrinkage and high and low temperature changes, and the glue will separate from the device.

[0005] In summary, the present invention provides a glue for filling an electric blanket junction box to solve the above problems. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a glue for filling the junction box of an electric blanket to solve the problems in the prior art of excessive stress caused by curing shrinkage and high and low temperature changes, resulting in colloid cracking, separation of colloid and devices, etc.

[0007] A glue for filling an electric blanket junction box, comprising the following raw materials in parts by weight:

[0008] 70-80 parts of modified epoxy resin, 1-9 parts of curing agent, 1-2 parts of defoaming agent, 0.5-3 parts of filler, 20-32 parts of film-forming aid, 0.5-2 parts of adhesive retainer and 0.5-2 parts of dispersant;

[0009] Step 1: Stir the modified epoxy resin, defoamer, gel retainer and dispersant under vacuum at 60° C. to obtain a mixture A;

[0010] Step 2: Mixing a curing agent, a filler and a film-forming aid to obtain a mixture B;

[0011] Step 3: Mix mixture A and mixture B at 90° C. for 20 minutes, stir evenly, and after defoaming, obtain the filling glue.

[0012] Furthermore, the modified epoxy resin includes E51 epoxy resin and E44 epoxy resin, the mass ratio of the E51 epoxy resin to the E44 epoxy resin is 1:2, and they are mixed with each other to obtain a resin mixture, and a CMP-410 toughening agent with a total content of 5 to 15% of the resin mixture is added and stirred evenly, and then placed in a 120° C. oven for 0.5 to 2 hours.

[0013] Furthermore, the filler includes any one of talc, silicon dioxide, aluminum hydroxide, mica, kaolin, calcium carbonate, and silicon micropowder, and the average particle size of the filler is between 0.05 and 20 microns.

[0014] Furthermore, the adhesive retaining agent includes polyvinyl pyrrolidone, and the curing agent is polyamide amine.

[0015] Furthermore, the dispersant includes any one of guar gum, methyl amyl alcohol, sodium lauryl sulfate, and sodium tripolyphosphate.

[0016] Furthermore, the defoaming agent is any one of BYK-A530 and BYK-A515.

[0017] Furthermore, in the step 1, the stirring and dispersing rate is 800 to 1500 rpm, the stirring time is 0.5 to 1.5 h, and the vacuum stirring and degassing time is 1 to 2 h.

[0018] Furthermore, in the step 2, the heating temperature is 85-95° C., and the heating time is 1.5-2.5 h.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The filling glue in the present invention concentrates more light energy, thereby increasing the collision chance of epoxy resin molecules during curing, reducing the light curing time, increasing the crosslinking density of the epoxy resin, and increasing the light curing depth, thereby effectively improving the hardness of the epoxy resin after curing and the anti-scratch performance after curing; in addition, the chemical bonds with strong interactions formed by the inactive nanoparticles regularly modified on the epoxy resin and the epoxy resin also improve the toughness of the potting glue after curing, and there are no surface scratches after curing; the adhesion failure mode to the carrier is good, and the bending test shows high toughness.

[0021] 2. The present invention improves elongation, high and low temperature performance, avoids colloid cracking caused by excessive stress caused by curing shrinkage and high and low temperature changes, colloid separation from devices, and high ductility reduces damage to electronic components, thereby meeting the increasingly high environmental change differences in modern industry's requirements for electronic potting glue, and is of great significance to the field of electronic component potting. By adding fillers, the mechanical strength of the colloid can be increased, the curing shrinkage can be reduced, and the sensitivity of the colloid to high and low temperature changes can be reduced, thereby reducing internal stress and avoiding cracking. At the same time, the compatibility between the filler and the glue is adjusted to reduce sedimentation.

[0022] 3. In the present invention, the mechanical properties, electrical properties and thermal properties after curing are excellent, and can meet the requirements of the electromechanical properties of the potting material for the gap of the heat-resistant electric blanket junction box structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the preparation flow chart of the present invention. DETAILED DESCRIPTION

[0024] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] like Figure 1 As shown, the present invention provides a glue for filling an electric blanket junction box, comprising the following raw materials in parts by weight:

[0026] 70-80 parts of modified epoxy resin, 1-9 parts of curing agent, 1-2 parts of defoaming agent, 0.5-3 parts of filler, 20-32 parts of film-forming aid, 0.5-2 parts of adhesive retainer and 0.5-2 parts of dispersant;

[0027] Step 1: Stir the modified epoxy resin, defoamer, gel retainer and dispersant under vacuum at 60° C. to obtain a mixture A;

[0028] Step 2: Mixing a curing agent, a filler and a film-forming aid to obtain a mixture B;

[0029] Step 3: Mix mixture A and mixture B at 90° C. for 20 minutes, stir evenly, and after defoaming, obtain the filling glue.

[0030] As an embodiment of the present invention, the modified epoxy resin includes E51 epoxy resin and E44 epoxy resin, the mass ratio of E51 epoxy resin to E44 epoxy resin is 1:2, and they are mixed with each other to obtain a resin mixture, and a CMP-410 toughening agent with a total content of 5 to 15% of the resin mixture is added, stirred evenly, and placed in a 120°C oven for 0.5 to 2 hours.

[0031] As an embodiment of the present invention, the filler includes any one of talc, silicon dioxide, aluminum hydroxide, mica, kaolin, calcium carbonate, and silicon micropowder, and the average particle size of the filler is between 0.05 and 20 microns.

[0032] As an embodiment of the present invention, the adhesive retaining agent includes polyvinyl pyrrolidone, and the curing agent is polyamide amine.

[0033] As an embodiment of the present invention, the dispersant includes any one of guar gum, methyl amyl alcohol, sodium lauryl sulfate and sodium tripolyphosphate.

[0034] As an embodiment of the present invention, the defoaming agent is any one of BYK-A530 and BYK-A515.

[0035] As an embodiment of the present invention, in step 1, the stirring and dispersing rate is 800 to 1500 rpm, the stirring time is 0.5 to 1.5 h, and the vacuum stirring and degassing time is 1 to 2 h.

[0036] As an embodiment of the present invention, in step 2, the heating temperature is 85 to 95° C., and the heating time is 1.5 to 2.5 hours.

[0037] Embodiment 1

[0038] A glue for filling an electric blanket junction box, comprising the following raw materials in parts by weight:

[0039] 80 parts of modified epoxy resin, 9 parts of curing agent, 2 parts of defoaming agent, 3 parts of filler, 32 parts of film-forming aid, 2 parts of gel retainer and 2 parts of dispersant;

[0040] Step 1: Stir the modified epoxy resin, defoamer, gel retainer and dispersant under vacuum at 60° C. to obtain a mixture A;

[0041] Step 2: Mixing a curing agent, a filler and a film-forming aid to obtain a mixture B;

[0042] Step 3: Mix mixture A and mixture B at 90° C. for 20 minutes, stir evenly, and after defoaming, obtain the filling glue.

[0043] Embodiment 2

[0044] A glue for filling an electric blanket junction box, comprising the following raw materials in parts by weight:

[0045] 75 parts of modified epoxy resin, 5 parts of curing agent, 1 part of defoaming agent, 1.9 parts of filler, 26 parts of film-forming aid, 1.8 parts of gel retainer and 1.7 parts of dispersant;

[0046] Step 1: Stir the modified epoxy resin, defoamer, gel retainer and dispersant under vacuum at 60° C. to obtain a mixture A;

[0047] Step 2: Mixing a curing agent, a filler and a film-forming aid to obtain a mixture B;

[0048] Step 3: Mix mixture A and mixture B at 90° C. for 20 minutes, stir evenly, and after defoaming, obtain the filling glue.

[0049] Embodiment 3

[0050] A glue for filling an electric blanket junction box, comprising the following raw materials in parts by weight:

[0051] 70 parts of modified epoxy resin, 1 part of curing agent, 1 part of defoaming agent, 0.5 parts of filler, 20 parts of film-forming aid, 0.5 parts of gel retainer and 0.5 parts of dispersant;

[0052] Step 1: Stir the modified epoxy resin, defoamer, gel retainer and dispersant under vacuum at 60° C. to obtain a mixture A;

[0053] Step 2: Mixing a curing agent, a filler and a film-forming aid to obtain a mixture B;

[0054] Step 3: Mix mixture A and mixture B at 90° C. for 20 minutes, stir evenly, and after defoaming, obtain the filling glue.

[0055] A glue for filling the junction box of an electric blanket was used to prepare Examples 1 to 3, and 3 groups of glue for filling the junction box of an electric blanket and 2 groups of comparative examples were obtained. The specific conditions are shown in Table 1:

[0056]

[0057]

[0058] The filling glue in the present invention concentrates more light energy, thereby increasing the collision opportunities of epoxy resin molecules during curing, reducing the light curing time, increasing the crosslinking density of the epoxy resin, and increasing the light curing depth, thereby effectively improving the hardness of the epoxy resin after curing and the anti-finger scratch performance after curing; in addition, the chemical bonds with strong interactions formed by the inactive nanoparticles regularly modified on the epoxy resin and the epoxy resin also improve the toughness of the potting glue after curing, and there are no surface finger scratches after curing; the adhesion failure mode to the carrier is good, the bending test shows high toughness, the elongation is improved, the high and low temperature performance is improved, and the colloid cracking caused by excessive stress caused by curing shrinkage and high and low temperature changes, the separation of the colloid and the device, and the high ductility reduces the damage to the electronic components, thereby meeting the environmental change differences that meet the increasingly high requirements of modern industry for electronic potting glue, and is of great significance to the field of electronic component potting. By adding fillers, the mechanical strength of the colloid can be increased, the curing shrinkage can be reduced, and the sensitivity of the colloid to high and low temperature changes can be reduced, thereby reducing internal stress and avoiding cracking. At the same time, the compatibility between the filler and the glue is adjusted to reduce sedimentation. The mechanical properties, electrical properties and thermal properties after curing are excellent, which can meet the requirements of the electromechanical properties of the potting material for the structural gap of the heat-resistant electric blanket junction box.

[0059] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A glue for filling the junction box of an electric blanket, characterized by: It includes the following raw materials in parts by weight: 70-80 parts of modified epoxy resin, 1-9 parts of curing agent, 1-2 parts of defoaming agent, 0.5-3 parts of filler, 20-32 parts of film-forming aid, 0.5-2 parts of adhesive retainer and 0.5-2 parts of dispersant; Step 1: Stir the modified epoxy resin, defoamer, gel retainer and dispersant under vacuum at 60° C. to obtain a mixture A; Step 2: Mixing a curing agent, a filler and a film-forming aid to obtain a mixture B; Step 3: Mix mixture A and mixture B at 90° C. for 20 minutes, stir evenly, and after defoaming, obtain the filling glue.

2. The adhesive for filling the electric blanket junction box according to claim 1, characterized in that: The modified epoxy resin includes E51 epoxy resin and E44 epoxy resin, the mass ratio of the E51 epoxy resin to the E44 epoxy resin is 1:2, and they are mixed with each other to obtain a resin mixture, and a CMP-410 toughening agent with a total content of 5 to 15% of the resin mixture is added and stirred evenly, and then placed in a 120° C. oven for 0.5 to 2 hours.

3. The adhesive for filling the electric blanket junction box according to claim 1, characterized in that: The filler includes any one of talc, silicon dioxide, aluminum hydroxide, mica, kaolin, calcium carbonate, and silicon micropowder, and the average particle size of the filler is between 0.05 and 20 microns.

4. The adhesive for filling the electric blanket junction box according to claim 1, characterized in that: The adhesive retainer includes polyvinyl pyrrolidone, and the curing agent is polyamide amine.

5. The adhesive for filling the electric blanket junction box according to claim 1, characterized in that: The dispersant includes any one of guar gum, methyl amyl alcohol, sodium lauryl sulfate and sodium tripolyphosphate.

6. The adhesive for filling the electric blanket junction box according to claim 1, characterized in that: The defoamer is any one of BYK-A530 and BYK-A515.

7. The adhesive for filling the electric blanket junction box according to claim 1, characterized in that: In the step 1, the stirring and dispersing rate is 800-1500 rpm, the stirring time is 0.5-1.5 h, and the vacuum stirring and degassing time is 1-2 h.

8. The adhesive for filling the electric blanket junction box according to claim 1, characterized in that: In the step 2, the heating temperature is 85-95° C. and the heating time is 1.5-2.5 h.

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