Rapidly-cured automotive interior repair adhesive and preparation method thereof

Abstract

The invention provides a rapidly-cured automotive trim repair adhesive and a preparation method thereof, the repair adhesive is composed of matrix resin, a curing agent, a flexibilizer, a filler and a proper amount of other auxiliary agents according to specific parts by weight, through reasonable raw material selection and proportioning and the specific preparation method, the repair adhesive has the characteristic of rapid curing in a short time, and the repair adhesive has the characteristics of rapid curing and good repair effect. Meanwhile, the adhesive is high in bonding strength to common materials of the automotive trim, good in flexibility and good in attractiveness after repairing, the problems that an existing automotive trim repairing adhesive is low in curing speed, not ideal in repairing effect and the like are effectively solved, the repairing efficiency and quality of the automotive trim are improved, and good application prospects are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile interior adhesives, and in particular to a fast-curing automobile interior repair adhesive and a preparation method thereof. Background Art

[0002] With the increasing number of cars in use, it is becoming more and more common for car interiors to be scratched and damaged during use. Existing car interior repair glues have many shortcomings. On the one hand, most repair glues cure slowly. For example, some common traditional repair glues often take several hours to cure at room temperature, which greatly affects the repair efficiency of car interiors, resulting in the vehicle being unable to resume normal use in time, increasing maintenance costs and vehicle downtime.

[0003] On the other hand, the comprehensive performance of existing repair adhesives after curing is difficult to meet the requirements. Although some repair adhesives can achieve a certain bonding effect, the bonding strength is insufficient. Under the vibration, friction and slight deformation caused by daily use of the car interior, the repaired part is prone to debonding and cracking. At the same time, there is also a lack of flexibility and it cannot adapt well to the deformation characteristics of the car interior materials. From the perspective of aesthetics, some repair adhesives have obvious differences in color and texture from the surrounding interior after repair, which affects the overall aesthetics and quality of the car interior.

[0004] In view of the above-mentioned defects of the prior art, there is an urgent need for an automotive interior repair adhesive that can cure quickly and perform well in many aspects such as bonding strength, flexibility and aesthetics, so as to meet the actual needs of efficient and high-quality repair of automotive interiors. Summary of the invention

[0005] Aiming at the problems of slow curing speed and poor flexibility of existing automobile interior adhesives, the invention provides a fast-curing automobile interior repair adhesive and a preparation method thereof.

[0006] Implementation method of the present invention: A fast-curing automotive interior repair adhesive, the components by weight are: 40-60 parts of liquid acrylic resin body, 10-20 parts of curing agent, 5-15 parts of toughening agent, 10-20 parts of filler, 0.5-2 parts of silane coupling agent, and 0.1-1 parts of defoaming agent. The liquid acrylic resin body in the present invention has relatively low molecular weight and cross-linking degree, and strong fluidity, and can flow freely. It can be directly added to other components without adding additional solvents to obtain a uniformly dispersed repair adhesive. The repair adhesive is compatible with a variety of automotive interior materials, and due to its excellent adhesion performance and water resistance and chemical resistance, it can ensure effective adhesion to interiors of different materials. The silane coupling agent can enhance the interfacial bonding force between the liquid acrylic resin body and the filler, and optimize the overall stability and uniformity of the repair adhesive. Preferably, the toughening agent is liquid polysulfide rubber. Liquid polysulfide rubber is more easily dispersed in the liquid acrylic resin body. Liquid polysulfide rubber as a toughening agent can effectively improve the flexibility of the repair glue after curing, achieve a better toughening effect, enable it to adapt to the slight deformation of the car interior caused by temperature changes, passenger squeezing and other factors in daily use, avoid cracking, falling off and other damages due to frequent stress on the repaired part, and ensure the durability of the repair effect.

[0007] Preferably, the curing agent is one of isophorone diamine, diethylene triamine or Mannich base. Diethylene triamine is highly active and can cure quickly, which can shorten the repair time and improve efficiency. Isophorone diamine has low volatility, low toxicity, and good flexibility of the cured product, which meets the environmental protection and performance requirements of automotive interiors. Mannich base, modified by aliphatic amines, has good low-temperature curing performance and flexibility. Under normal temperature (15°C-30°C) and normal humidity (relative humidity 40%-70%) environmental conditions, isophorone diamine, diethylene triamine or Mannich base can quickly undergo cross-linking reaction with the liquid acrylic resin body, so that the repair glue can be quickly cured within 5-15 minutes, greatly improving the repair efficiency.

[0008] Preferably, the curing agent is a mixture of two of isophoronediamine, diethylenetriamine or Mannich base.

[0009] Preferably, the curing agent is a mixture of isophoronediamine, diethylenetriamine and Mannich base.

[0010] Preferably, the filler is a mixture of nano calcium carbonate and colored mica powder. The nano calcium carbonate can adjust the viscosity of the repair glue, increase the filling capacity, and improve the physical properties of the repair glue; the colored mica powder can be selected in a color system similar to the color of the car interior to improve the aesthetics after the repair, so that the repaired part and the surrounding interior are better integrated in color and texture, reduce the repair marks, and improve the overall aesthetics. The use of colored mica powder can replace the traditional color paste color mixing solution, and the appearance of the repaired product is more natural.

[0011] Preferably, the defoamer is a polyether-modified silicone oil defoamer, which can eliminate bubbles generated during the preparation process such as mixing and stirring the raw materials, prevent residual bubbles from adversely affecting the performance of the repair adhesive and the appearance after repair, and ensure that the performance of the repair adhesive in all aspects reaches the best state.

[0012] The preparation method of the above-mentioned fast-curing automobile interior repair adhesive comprises the following steps: step 1, weighing each component by weight at room temperature and pressure; step 2, adding the liquid acrylic resin body into a reactor with a planetary mixer, starting the stirring device, and stirring at a speed of 300-500r / min for 5-10min to make the liquid acrylic resin body preliminarily and evenly dispersed in the reactor; step 3, slowly adding a curing agent, a toughening agent, a filler, a silane coupling agent and a defoaming agent in sequence, and maintaining the stirring state for 1-2min after each raw material is added to ensure that the raw materials are preliminarily mixed evenly until all the raw materials are added; step 4, after all the raw materials are added, increasing the stirring speed to 1000-1500r / min, and continuously stirring for 20-30min to form a uniform, stable and fast-curing automobile interior repair adhesive without obvious bubbles.

[0013] Through the synergy of the above components, the beneficial effects of the present invention are as follows: (1) Rapid curing: Under conventional indoor and outdoor environmental conditions, the present invention exhibits excellent rapid curing performance and can complete curing in a short time. Compared with existing similar products, it significantly shortens the waiting time for automobile interior repair, improves the repair efficiency, and enables the vehicle to return to normal use faster, greatly meeting the needs of the automobile repair industry for efficient repair. (2) Excellent bonding strength: After rigorous bonding strength testing, the repair adhesive can achieve firm bonding to common automobile interior materials, such as ABS plastic, polypropylene plastic, natural leather, artificial leather and various fabrics, and its tensile shear strength can reach 8-12MPa, effectively ensuring that the repaired part will not easily debond or fall off during long-term use, thereby extending the service life of the automobile interior. (3) Good flexibility: The cured repair adhesive has good flexibility and can adapt to the slight deformation of the car interior caused by various factors in daily use. Through repeated bending, stretching and other tests simulating actual use scenarios, after 100-200 times of bending or stretching, the repaired part remains intact without cracking, which fully demonstrates its advantage in flexibility and improves the reliability and durability of the repair. (4) High aesthetics: Due to the reasonable selection of colored mica powder and other ingredients in the filler and the synergistic effect with other raw materials, the repaired part can achieve a good integration with the surrounding interior in terms of color, texture, etc. From the appearance, the repair marks are not obvious, which can effectively improve the overall aesthetics of the car interior and meet the high requirements of users for the appearance quality of the car interior. DETAILED DESCRIPTION

[0014] The specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments. Example

[0015] A fast-curing automobile interior repair adhesive comprises the following components in parts by weight: 40 parts of a liquid acrylic resin body, 10 parts of a curing agent, 5 parts of a toughening agent, 15 parts of a filler, 0.5 parts of a silane coupling agent, and 0.1 parts of a defoaming agent; the curing agent is a mixture of diethylenetriamine and a Mannich base, wherein the diethylenetriamine comprises 8 parts and the Mannich base comprises 2 parts; the toughening agent is a liquid polysulfide rubber; the filler is a mixture of nano-calcium carbonate and colored mica powder, wherein the nano-calcium carbonate comprises 12 parts and the colored mica powder comprises 3 parts; the defoaming agent is a polyether-modified silicone oil defoaming agent, and the silane coupling agent is KH-560.

[0016] The preparation method of the above-mentioned fast-curing automobile interior repair adhesive comprises the following steps: step 1, weighing each component by weight at room temperature and pressure; step 2, adding a liquid acrylic resin body into a reactor with a planetary mixer, starting the stirring device, and stirring at a speed of 300 r / min for 5 minutes to make the liquid acrylic resin body preliminarily and evenly dispersed in the reactor; step 3, slowly adding a curing agent, a toughening agent, a filler, a silane coupling agent and a defoaming agent in sequence, and maintaining the stirring state for 2 minutes after each raw material is added to ensure that the raw materials are preliminarily mixed evenly until all the raw materials are added; step 4, after all the raw materials are added, increasing the stirring speed to 1000 r / min, and continuously stirring for 30 minutes to form a uniform, stable and fast-curing automobile interior repair adhesive without obvious bubbles.

[0017] The fast-curing automobile interior repair adhesive obtained in this example was used to repair scratches on the plastic interior panel next to the driver's seat of a car. The construction conditions were an indoor temperature of 20° C. and a relative humidity of 50%. Its performance parameters are shown in Table 1. Example

[0018] A fast-curing automobile interior repair adhesive comprises the following components in parts by weight: 50 parts of a liquid acrylic resin body, 15 parts of a curing agent, 15 parts of a toughening agent, 15 parts of a filler, 1 part of a silane coupling agent, and 0.5 parts of a defoamer; the curing agent is a mixture of isophorone diamine and a Mannich base, wherein the isophorone diamine comprises 10 parts and the Mannich base comprises 5 parts; the toughening agent is a liquid polysulfide rubber; the filler is a mixture of nano calcium carbonate and colored mica powder, wherein the nano calcium carbonate comprises 8 parts and the colored mica powder comprises 7 parts; the defoamer is a polyether-modified silicone oil defoamer, and the silane coupling agent is KH-550.

[0019] The preparation method of the above-mentioned fast-curing automobile interior repair adhesive comprises the following steps: step 1, weighing each component by weight at room temperature and pressure; step 2, adding a liquid acrylic resin body into a reactor with a planetary mixer, starting the stirring device, and stirring at a speed of 500r / min for 8 minutes to make the liquid acrylic resin body preliminarily and evenly dispersed in the reactor; step 3, slowly adding a curing agent, a toughening agent, a filler, a silane coupling agent and a defoaming agent in sequence, and maintaining the stirring state for 1 minute after each raw material is added to ensure that the raw materials are preliminarily mixed evenly until all the raw materials are added; step 4, after all the raw materials are added, increasing the stirring speed to 1200r / min, and continuously stirring for 25 minutes to form a uniform, stable and fast-curing automobile interior repair adhesive without obvious bubbles.

[0020] The fast-curing automobile interior repair adhesive obtained in this example was used to repair stains on the fabric interior of an SUV trunk. The construction conditions were an outdoor temperature of 25° C. and a humidity of 60%. Its performance parameters are shown in Table 1. Example

[0021] A fast-curing automobile interior repair adhesive comprises the following components in parts by weight: 60 parts of a liquid acrylic resin body, 20 parts of a curing agent, 15 parts of a toughening agent, 15 parts of a filler, 2 parts of a silane coupling agent, and 1 part of a defoamer; the curing agent is a mixture of isophorone diamine, diethylene triamine, and Mannich base, wherein the isophorone diamine comprises 10 parts, the diethylene triamine comprises 8 parts, and the Mannich base comprises 2 parts; the toughening agent is liquid polysulfide rubber; the filler is a mixture of nano calcium carbonate and colored mica powder, wherein the nano calcium carbonate comprises 6 parts and the colored mica powder comprises 9 parts; the defoamer is a polyether-modified silicone oil defoamer, and the silane coupling agent is A-151.

[0022] The preparation method of the above-mentioned fast-curing automobile interior repair adhesive comprises the following steps: step 1, weighing each component by weight at room temperature and pressure; step 2, adding a liquid acrylic resin body into a reactor equipped with a planetary mixer, starting the stirring device, stirring at a speed of 400 r / min for 10 minutes, so that the liquid acrylic resin body is initially and evenly dispersed in the reactor; step 3, slowly adding a curing agent, a toughening agent, a filler, a silane coupling agent and a defoaming agent in sequence, and maintaining the stirring state for 1.5 minutes after each raw material is added to ensure that the raw materials are initially mixed evenly until all the raw materials are added; step 4, after all the raw materials are added, increasing the stirring speed to 1500 r / min, and continuously stirring for 20 minutes to form a uniform, stable and fast-curing automobile interior repair adhesive without obvious bubbles.

[0023] The fast-curing automobile interior repair adhesive obtained in this example was used to repair holes in the middle-row leather seats of an MPV. The construction conditions were an indoor temperature of 18° C. and a humidity of 45%. Its performance parameters are shown in Table 1. Example

[0024] A fast-curing automobile interior repair adhesive comprises the following components by weight: 45 parts of a liquid acrylic resin body, 12 parts of a curing agent, 8 parts of a toughening agent, 15 parts of a filler, 1 part of a silane coupling agent, and 0.3 parts of a defoaming agent; the curing agent is isophorone diamine; the toughening agent is liquid polysulfide rubber; the filler is a mixture of nano calcium carbonate and colored mica powder, wherein the nano calcium carbonate comprises 10 parts and the colored mica powder comprises 5 parts; the defoaming agent is a polyether-modified silicone oil defoaming agent; and the silane coupling agent is KH-560.

[0025] The preparation method of the above-mentioned fast-curing automobile interior repair adhesive comprises the following steps: step 1, weighing each component by weight at room temperature and pressure; step 2, adding a liquid acrylic resin body into a reactor with a planetary mixer, starting the stirring device, and stirring at a speed of 350r / min for 6 minutes to make the liquid acrylic resin body preliminarily and evenly dispersed in the reactor; step 3, slowly adding a curing agent, a toughening agent, a filler, a silane coupling agent and a defoaming agent in sequence, and maintaining the stirring state for 2 minutes after each raw material is added to ensure that the raw materials are preliminarily mixed evenly until all the raw materials are added; step 4, after all the raw materials are added, increasing the stirring speed to 1100r / min, and continuously stirring for 22 minutes to form a uniform, stable and fast-curing automobile interior repair adhesive without obvious bubbles.

[0026] The fast-curing automobile interior repair adhesive obtained in this example was used to treat the bump damage of the PET plastic interior of a small passenger car door. The construction conditions were an outdoor temperature of 22° C. and a humidity of 55%. Its performance parameters are shown in Table 1. Example

[0027] A fast-curing automobile interior repair adhesive comprises the following components by weight: 55 parts of a liquid acrylic resin body, 18 parts of a curing agent, 12 parts of a toughening agent, 15 parts of a filler, 1.5 parts of a silane coupling agent, and 0.8 parts of a defoaming agent; the curing agent is diethylenetriamine; the toughening agent is liquid polysulfide rubber; the filler is a mixture of nano-calcium carbonate and colored mica powder, wherein the nano-calcium carbonate comprises 7 parts and the colored mica powder comprises 8 parts; the defoaming agent is a polyether-modified silicone oil defoaming agent; and the silane coupling agent is KH-560.

[0028] The preparation method of the above-mentioned fast-curing automobile interior repair adhesive comprises the following steps: step 1, weighing each component by weight at room temperature and pressure; step 2, adding a liquid acrylic resin body into a reactor with a planetary mixer, starting the stirring device, and stirring at a speed of 450r / min for 9 minutes to make the liquid acrylic resin body preliminarily and evenly dispersed in the reactor; step 3, slowly adding a curing agent, a toughening agent, a filler, a silane coupling agent and a defoaming agent in sequence, and maintaining the stirring state for 1.5 minutes after each raw material is added to ensure that the raw materials are preliminarily mixed evenly until all the raw materials are added; step 4, after all the raw materials are added, increasing the stirring speed to 1300r / min, and continuously stirring for 28 minutes to form a uniform, stable and fast-curing automobile interior repair adhesive without obvious bubbles.

[0029] The fast-curing automobile interior repair adhesive obtained in this example was used to repair the wear of the simulated leather wrapped part of the sports car steering wheel. The construction conditions were indoor temperature 28° C. and humidity 65%. Its performance parameters are shown in Table 1. Example

[0030] A fast-curing automobile interior repair adhesive comprises the following components in parts by weight: 40 parts of a liquid acrylic resin body, 10 parts of a curing agent, 5 parts of a toughening agent, 10 parts of a filler, 0.5 parts of a silane coupling agent, and 0.1 parts of a defoaming agent; the curing agent is a mixture of diethylenetriamine and isophoronediamine, wherein the diethylenetriamine comprises 8 parts and the isophoronediamine comprises 2 parts; the toughening agent is liquid polysulfide rubber; the filler is a mixture of nano-calcium carbonate and colored mica powder, wherein the nano-calcium carbonate comprises 8 parts and the colored mica powder comprises 2 parts; the defoaming agent is a polyether-modified silicone oil defoaming agent, and the silane coupling agent is KH-550.

[0031] The preparation method of the above-mentioned fast-curing automobile interior repair adhesive comprises the following steps: step 1, weighing each component by weight at room temperature and pressure; step 2, adding a liquid acrylic resin body into a reactor with a planetary mixer, starting the stirring device, and stirring at a speed of 300 r / min for 5 minutes to make the liquid acrylic resin body preliminarily and evenly dispersed in the reactor; step 3, slowly adding a curing agent, a toughening agent, a filler, a silane coupling agent and a defoaming agent in sequence, and maintaining the stirring state for 2 minutes after each raw material is added to ensure that the raw materials are preliminarily mixed evenly until all the raw materials are added; step 4, after all the raw materials are added, increasing the stirring speed to 1000 r / min, and continuously stirring for 30 minutes to form a uniform, stable and fast-curing automobile interior repair adhesive without obvious bubbles.

[0032] The fast-curing automobile interior repair adhesive obtained in this example was used to repair scratches on the plastic interior panel next to the driver's seat of a car. The construction conditions were an indoor temperature of 20° C. and a relative humidity of 50%. Its performance parameters are shown in Table 1. Example

[0033] A fast-curing automobile interior repair adhesive comprises the following components by weight: 40 parts of a liquid acrylic resin body, 10 parts of a curing agent, 5 parts of a toughening agent, 20 parts of a filler, 0.5 parts of a silane coupling agent, and 0.1 parts of a defoaming agent; the curing agent is a Mannich base; the toughening agent is a liquid polysulfide rubber; the filler is a mixture of nano-calcium carbonate and colored mica powder, wherein the nano-calcium carbonate comprises 16 parts and the colored mica powder comprises 4 parts; the defoaming agent is a polyether-modified silicone oil defoaming agent; and the silane coupling agent is A-151.

[0034] The preparation method of the above-mentioned fast-curing automobile interior repair adhesive comprises the following steps: step 1, weighing each component by weight at room temperature and pressure; step 2, adding a liquid acrylic resin body into a reactor with a planetary mixer, starting the stirring device, and stirring at a speed of 300 r / min for 5 minutes to make the liquid acrylic resin body preliminarily and evenly dispersed in the reactor; step 3, slowly adding a curing agent, a toughening agent, a filler, a silane coupling agent and a defoaming agent in sequence, and maintaining the stirring state for 2 minutes after each raw material is added to ensure that the raw materials are preliminarily mixed evenly until all the raw materials are added; step 4, after all the raw materials are added, increasing the stirring speed to 1000 r / min, and continuously stirring for 30 minutes to form a uniform, stable and fast-curing automobile interior repair adhesive without obvious bubbles.

[0035] The fast-curing automobile interior repair adhesive obtained in this example was used to repair scratches on the plastic interior panel next to the driver's seat of a car. The construction conditions were an indoor temperature of 20° C. and a relative humidity of 50%. Its performance parameters are shown in Table 1.

[0036] It can be seen from the performance parameters of Examples 1 to 7 in different application scenarios that the present invention shortens the curing time to a minimum of 7 minutes, and has a good appearance repair effect. When applied to different repair materials, the tensile shear strength and the number of bends or stretches all achieve excellent results.

[0037] Table 1 Application conditions and performance parameters of the fast-curing automotive interior repair adhesive obtained in Examples 1 to 7 Example Repair materials Ambient temperature Ambient humidity Curing time Tensile shear strength Bending or stretching times Evaluation of appearance repair effect (1-5 points, 5 points is the best) 1 ABS plastic 20℃ 50% 8min 9MPa 100 times 4 2 Fabric 25℃ 60% 10min 10MPa 180 times 3.5 3 natural leather 18℃ 45% 12min 11MPa 200 times 4.5 4 PET plastic 22℃ 55% 9min 8MPa 100 times 4 5 Artificial leather 28℃ 65% 11min 10MPa 170 times 3.5 6 ABS plastic 20℃ 50% 7min 8.5MPa 110 times 3.5 7 ABS plastic 20℃ 50% 9min 9.5MPa 90 times 4.5

Claims

1. A fast-curing automobile interior repair adhesive, characterized in that: The components are as follows by weight: 40-60 parts of liquid acrylic resin, 10-20 parts of curing agent, 5-15 parts of toughening agent, 10-20 parts of filler, 0.5-2 parts of silane coupling agent and 0.1-1 parts of defoaming agent.

2. The fast-curing automobile interior repair adhesive according to claim 1, characterized in that: The toughening agent is liquid polysulfide rubber.

3. The fast-curing automobile interior repair adhesive according to claim 1, characterized in that: The curing agent is one of isophoronediamine, diethylenetriamine or Mannich base.

4. The fast-curing automobile interior repair adhesive according to claim 1, characterized in that: The curing agent is a mixture of two of isophoronediamine, diethylenetriamine or Mannich base.

5. The fast-curing automobile interior repair adhesive according to claim 1, characterized in that: The curing agent is a mixture of isophoronediamine, diethylenetriamine and Mannich base.

6. The fast-curing automobile interior repair adhesive according to claim 1, characterized in that: The filler is a mixture of nano calcium carbonate and colored mica powder.

7. The fast-curing automobile interior repair adhesive according to claim 1, characterized in that: The defoamer is a polyether modified silicone oil defoamer.

8. A method for preparing a fast-curing automobile interior repair adhesive according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: step 1, weighing each component by weight at room temperature and pressure; step 2, adding a liquid acrylic resin body into a reactor equipped with a planetary mixer, starting the stirring device, stirring at a speed of 300-500 r / min for 5-10 minutes, so that the liquid acrylic resin body is preliminarily and evenly dispersed in the reactor; step 3, slowly adding a curing agent, a toughening agent, a filler, a silane coupling agent and a defoaming agent in sequence, maintaining a stirring state for 1-2 minutes after each raw material is added, ensuring that the raw materials are preliminarily mixed evenly until all the raw materials are added; step 4, after all the raw materials are added, increasing the stirring speed to 1000-1500 r / min, and continuously stirring for 20-30 minutes to form a uniform, stable and fast-curing automotive interior repair adhesive without obvious bubbles.