Glue, and plastic and metal composite housing preparation method

A glue and water-based technology, applied in the direction of adhesives, rosin adhesives, etc., can solve problems such as cleaning, product approval, and damage to molds

Active Publication Date: 2016-04-06
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the metal material is conductive, it will also shield part of the signal function, resulting in a low signal capability of the mobile phone with a metal integrated structure. In order to make this structure or type of product more versatile in application or such mobile phone signals will not be blocked by metal. Substance interference, often need to inject a small part of plastic in the appropriate part to solve this bottleneck
[0003] At the same time, general metals are easy to oxidize. Although the oxide layer has a certain passivation effect, the oxide layer will peel off after long-term exposure and lose its protective effect. Therefore, it

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0037] The present invention also provides a method for preparing a plastic and metal composite shell, the method comprising the following steps:

[0038] S1. Coating glue on the metal surface to be combined with plastic, and then surface-drying the glue;

[0039] S2. Put the metal obtained in step S1 into a mold to inject plastic to obtain an assembly;

[0040] S3, baking the assembly;

[0041] S4, performing anodic oxidation on the baked assembly to obtain a plastic and metal composite shell;

[0042] Wherein, the glue is the glue described in the present invention.

[0043] In the present invention, the glue that can be cross-linked twice is coated on the joint position of the metal and plastic integrated product, so that the assembly becomes an absolutely integrated product (there is no gap at the joint of the composition, that is, the glue combines with the metal and plastic and penetrates into the joint. In the two interfaces), so as to prevent this type of assembly p...

Embodiment 1

[0051] 1. Prepare glue

[0052] (1) Take the experimental cup 1 and introduce 40g of water-based self-crosslinking acrylic resin Geely-832 (TG value: 65°C) into the experimental container. Then add 20g of water-based rosin tackifying resin and stir evenly with a glass rod. Add 0.1g of additive glide-410 to increase fluidity. Then add 0.1 g of defoamer BYK-020. Then add 0.3g adhesion promoter Dow Corning-6040. Add 10g of n-butanol, and then stir evenly with a glass rod for 5 minutes to better disperse the leveling agent, defoamer, and accelerator.

[0053] (2) Finally, add 6.5g of deionized water to adjust the viscosity, and stir evenly for 5 minutes. Stand still for 20 minutes to allow the air bubbles during stirring to dissipate to obtain component A1.

[0054] (3) Take another experimental cup 2 and add 15g of polyamide particles. Then add 8g of PA treatment agent, stir for 10 minutes, and stand still for 10 minutes to obtain component B1.

[0055] (4) Mix component B...

Embodiment 2

[0063] 1. Prepare glue

[0064] (1) Take the experimental cup 1 and introduce 60g of water-based self-crosslinking acrylic resin Geely-832 into the experimental container. Then add 10g of water-based rosin tackifying resin and stir evenly with a glass rod. Add 0.21g of additive glide-410 to increase fluidity. Then add 0.2 g of defoamer BYK-020. Then add 0.5g adhesion promoter Dow Corning-6040. Add 7g of the first solvent n-butanol, and then stir evenly with a glass rod for 3 minutes to better disperse the leveling agent, defoamer, and accelerator.

[0065] (2) Finally, add 3g of deionized water to adjust the viscosity, and stir evenly for 5 minutes. Stand still for 20 minutes to allow the air bubbles during stirring to dissipate to obtain component A2.

[0066] (3) Take another test cup 2 and add 10g of polyamide particles. Then add 9.7g of polyamide treatment agent, stir for 10 minutes, and stand still for 10 minutes to obtain component B2.

[0067] (4) Mix component B...

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PUM

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Abstract

The present invention provides a glue, and a plastic and metal composite housing preparation method. The glue comprises a main body resin, a tackifying resin, an auxiliary agent and a solvent, wherein the main body resin is an aqueous self-cross-linking acrylic acid resin and a polyamide resin, a mass ratio of the aqueous self-cross-linking acrylic acid resin to the polyamide resin is 2.66-6:1, the glass transition temperature of the aqueous self-cross-linking acrylic acid resin is 40-80 DEG C, and glue further comprises a polyamides treatment agent. According to the present invention, the chemical-resistant polishing test result of the glue layer prepared from the glue is better than the chemical-resistant polishing test result of the control sample; and when the glue of the present invention is used for anode oxidation of the metal and plastic composite housing, no acid hiding is generated, the product yield is high and the drawing force can meet the requirement while the acid hiding phenomenon is generated, the yield is low, the drawing force of the control samples 1-2 is low, and the requirement cannot be met when the control sample is used for anode oxidation of the metal and plastic composite housing.

Description

technical field [0001] The invention belongs to the field of anodic oxidation, and in particular relates to a preparation method of glue and a plastic and metal composite shell. Background technique [0002] With the continuous improvement of people's material living standards and the gradual improvement of designers' concepts, more and more mobile phones use metal integrated structures to improve the grade and service life of mobile phones, so as to achieve innovation and attractiveness in product structure and appearance. consumers' eyeballs. However, because the metal material is conductive, it will also shield part of the signal function, resulting in a low signal capability of the mobile phone with a metal integrated structure. In order to make this structure or type of product more versatile in application or such mobile phone signals will not be blocked by metal. Interfering with substances, it is often necessary to inject a small amount of plastic at an appropriate ...

Claims

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Application Information

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IPC IPC(8): C09J133/00C09J177/00C09J193/04C09J11/00B29C45/14B29C71/02
Inventor 左永利崔静娜
Owner BYD CO LTD
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