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Low-temperature curing type high-foaming-ratio primer for automobile and preparation method of primer

A curing type, high-foaming technology, applied in the direction of adhesives, adhesive types, polymer adhesive additives, etc., can solve the problems of high energy and cost, output, and high curing conditions, and achieve strong mechanical strength and gelation The effect of lowering the temperature and melting temperature and reducing the attractive force between molecules

Active Publication Date: 2020-03-24
保光(天津)汽车零部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary and medium foaming primers, the amount used per vehicle is generally 7-8kg, and it is one of the most used adhesives for automobile bodies, and the curing conditions are relatively high, resulting in a large output of energy and costs for automobile factories

Method used

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  • Low-temperature curing type high-foaming-ratio primer for automobile and preparation method of primer
  • Low-temperature curing type high-foaming-ratio primer for automobile and preparation method of primer
  • Low-temperature curing type high-foaming-ratio primer for automobile and preparation method of primer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment provides a low-temperature curing type high expansion ratio automotive primer, and its preparation process is as follows:

[0029] (1) Mixing: Add 300g of diluent, 2900g of dioctyl phthalate and 150g of low-molecular polyamide adhesion promoter with high amine value (250mgKOH / g) into the stirring tank, stir at 500rpm for 3 minutes; then add suction Moisture agent 400g, heat stabilizer 150g, PVC paste resin with bimodal distribution 800g, vinyl chloride-vinyl acetate copolymer paste resin 1500g, thermosetting acrylic resin powder 700g, stir at 1200rpm for 4 minutes; then add nano-calcium carbonate filler 2890g, Akzo Bell's 043DU80 microsphere foaming agent 210g, stirred at 1200rpm for 3 minutes;

[0030] (2) Grinding: the evenly stirred material is passed through a three-roll mill;

[0031] (3) Placement: After the material is ground, it is pumped into a vacuum tank for 24 hours to stabilize the viscosity of the product;

[0032] (4) Viscosity adjustmen...

Embodiment 2

[0037] This embodiment provides a low-temperature curing type high expansion ratio automotive primer, and its preparation process is as follows:

[0038] (1) Mixing: Add 300g of diluent, 3200g of dioctyl phthalate and 100g of low-molecular polyamide adhesion promoter with high amine value (250mgKOH / g) into the stirring tank, stir at 500rpm for 3 minutes; then add suction Moisture agent 100g, heat stabilizer 100g, PVC paste resin with bimodal distribution 500g, vinyl chloride-vinyl acetate copolymer paste resin 2000g, thermosetting acrylic resin powder 500g, stir at 1200rpm for 4 minutes; then add nano-calcium carbonate filler 3000g, Akzo Bell's 043DU80 microsphere foaming agent 200g, stirred at 1200rpm for 3 minutes;

[0039] (2) Grinding: the evenly stirred material is passed through a three-roll mill;

[0040] (3) Placement: After the material is ground, it is pumped into a vacuum tank for 24 hours to stabilize the viscosity of the product;

[0041] (4) Viscosity adjustmen...

Embodiment 3

[0046] This embodiment provides a low-temperature curing type high expansion ratio automotive primer, and its preparation process is as follows:

[0047] (1) Mixing: Add 500g of diluent, 2500g of dioctyl phthalate and 200g of low molecular weight polyamide adhesion promoter with high amine value (250mgKOH / g) into the stirring tank, stir at 500rpm for 3 minutes; then add suction Moisture agent 500g, heat stabilizer 100g, bimodal PVC paste resin 1000g, vinyl chloride-vinyl acetate copolymer paste resin 1500g, thermosetting acrylic resin powder 1000g, stir at 1200rpm for 4 minutes; then add nano calcium carbonate filler 2500g, Akzo Bell's 043DU80 microsphere foaming agent 200g, stirred at 1200rpm for 3 minutes;

[0048] (2) Grinding: the evenly stirred material is passed through a three-roll mill;

[0049] (3) Placement: After the material is ground, it is pumped into a vacuum tank for 24 hours to stabilize the viscosity of the product;

[0050] (4) Viscosity adjustment: After ...

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Abstract

The invention discloses a low-temperature curing type high-foaming-ratio primer for an automobile and a preparation method of the low-temperature curing type high-foaming-ratio primer. The primer forthe automobile comprises the following components in percentage by mass: 25%-35% of dioctyl phthalate, 3%-5% of a diluent, 15%-20% of PVC copolymer resin, 5%-10% of bimodal distribution PVC paste resin, 5%-10% of thermosetting acrylic resin powder, 25%-30% of a nano filler, 2.0%-2.5% of microsphere foaming agent, 1%-5% of a moisture absorbent, 1%-2% of a heat stabilizer and 1%-2% of an adhesion promoter, and the foaming temperature range of the microsphere foaming agent covers 120 DEG C-130 DEG C. The foaming ratio of the low-temperature curing type high-foaming-ratio primer for the automobilereaches 105%, the curing condition is 130 DEG C * 20 min, and the low-temperature curing type high-foaming-ratio primer is of great significance in light weight of an automobile body, energy conservation, emission reduction and cost reduction in the manufacturing process..

Description

technical field [0001] The application relates to a primer for automobiles, in particular to a low-temperature-curing primer for automobiles with high expansion ratio and a preparation method thereof. Background technique [0002] Automotive undercoating glue is used in the automotive industry, and plays the role of waterproofing, sealing, noise reduction and stone impact resistance on the chassis of the car body. At present, the primer for automobiles is made of PVC as the main material, and it is a gray-black paste material mixed with plasticizers, adhesion promoters, diluents, heat stabilizers, nano fillers, heavy calcium carbonate and other raw materials. At present, the primers used in the market are mainly ordinary primers and medium-foaming primers (40%-50% foaming ratio), and the curing conditions are generally above 140°C for 30 minutes. [0003] With the development of the times, automobile lightweight and energy saving and emission reduction have become important...

Claims

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Application Information

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IPC IPC(8): C09J127/06C09J133/04C09J11/04C09J11/06C09J11/08C08J9/32
CPCC08J9/32C08J2203/22C08J2327/06C08J2427/06C08K2003/265C08K2201/011C08L2205/025C08L2205/03C09J11/04C09J11/06C09J11/08C09J127/06C08L27/06C08L33/04C08K5/12C08K3/26
Inventor 吕韶凯
Owner 保光(天津)汽车零部件有限公司
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