阅读说明：本技术 一种用于vcp电镀的光亮剂及其制备方法 (Brightener for VCP electroplating and preparation method thereof ) 是由 张勇 杨磊 于 2020-07-09 设计创作，主要内容包括：本发明属于电镀用的添加剂技术领域,具体公开了一种用于VCP电镀的光亮剂及其制备方法,本发的用于VCP电镀的光亮剂含有整平剂、聚环氧氯丙烷胺、固化剂、柠檬酸、硼酸和螯合剂,其中弱酸性物质柠檬酸和硼酸的混合能够有效的去除镀层表面的氧化剂,而不算上镀层,聚环氧氯丙烷胺的添加能够有效的去除镀层表面的脏污,其他组分的添加使得本发明配方组分合理、有效,配制过程无污染,环保安全,本发明的光亮度好,不易氧化,使用方便,电镀质量好,镀层亮度高,稳定持久不变色,具有广泛的推广应用价值和良好的经济社会效益。(The brightener for VCP electroplating contains a leveling agent, polyepoxy chloropropane amine, a curing agent, citric acid, boric acid and a chelating agent, wherein the mixture of weakly acidic substances citric acid and boric acid can effectively remove an oxidant on the surface of a plating layer without calculating the plating layer, the addition of the polyepoxy chloropropane amine can effectively remove dirt on the surface of the plating layer, and the addition of other components ensures that the brightener has reasonable and effective formula components, no pollution in the preparation process, environmental protection and safety.)

1. A brightener for VCP plating, characterized by: the brightener for VCP electroplating comprises the following components in parts by weight: 5-8 parts of leveling agent, 10-20 parts of poly (chloropropylene oxide) amine, 1-3 parts of curing agent, 2-3 parts of citric acid, 2-3 parts of boric acid, 0.1-0.3 part of chelating agent and 75-88 parts of deionized water.

2. A brightener for VCP plating according to claim 1, wherein: the leveling agent is a mixture of basic yellow and polymeric alizarin alcohol blue dye, and the weight ratio of the basic yellow to the polymeric alizarin alcohol blue dye is 1: 1-3.

3. A brightener for VCP plating according to claim 1, wherein: the poly (epichlorohydrin) amine is synthesized by taking dimethylamine, tertiary amine and epichlorohydrin as raw materials and adding polyethylene polyamine as a cross-linking agent.

4. A brightener for VCP plating according to claim 3, wherein: the preparation method of the poly (chloropropylene oxide) amine comprises the following steps: adding a mixed solution of 30-35 wt% of dimethylamine solution and tertiary amine into a reaction kettle at the constant temperature of 20-40 ℃, slowly dripping epichlorohydrin while stirring, reacting at the constant temperature of 20-40 ℃ for 30-60min after dripping is finished, finally adding polyethylene polyamine, continuously stirring, slowly heating to 60-80 ℃, and reacting for 30-60min to obtain the poly (chloropropylene oxide) amine.

5. A brightener for VCP plating according to claim 1, wherein: the curing agent is hexamethylene diisocyanate.

6. A brightener for VCP plating according to claim 1, wherein: the chelating agent is a mixture of EDTA-2Na and glycolic acid, and the weight ratio of the EDTA-2Na to the glycolic acid is 1-3: 1.

7. A brightener for VCP plating according to any one of claims 1 to 6, characterized in that: the preparation method of the brightener for VCP electroplating comprises the following steps:

the method comprises the following steps: adding deionized water and a chelating agent into a container to be dissolved completely to obtain a mixture A;

step two: adding the poly (chloropropylene oxide) amine, the curing agent and the leveling agent into the mixture A obtained in the step one, and dissolving until the mixture is completely dissolved to obtain a mixture B;

step three: and adding citric acid and boric acid into the mixture B in the second step to be dissolved completely to obtain the brightening agent for VCP electroplating.

Technical Field

The invention belongs to the technical field of additives for electroplating, and particularly relates to a brightener for VCP electroplating and a preparation method thereof.

Background

In the industrial industry, when various materials such as plastic, optical glass lenses, metal products (copper, iron, aluminum, steel, zinc, alloy) and the like clean various oil stains, stains and grease such as surface stretching oil, cutting oil, antirust oil, lubricating oil, stamping oil and the like, the cleaning is often needed, and diesel oil, kerosene or gasoline is mostly used as a cleaning solution to clean parts. This is not only wasteful of energy, but also presents a potential unsafe factor that, with some caution, can lead to a fire. In addition, the adopted cleaning agent has the defects of high and low quality, poor integral decontamination performance, easy corrosion damage to human bodies, low safety and poor surface color and luster after decontamination. Therefore, the surface of the metal product is plated with a layer of brightener, so that the metal is not easily polluted by oil stains, and the attractiveness of the metal product is ensured.

Brightener is an additive added into plating solution to obtain bright layer degree. The brightener has good internal and external lubricating performance and surface smoothness, good intersolubility and anti-sticking performance, and can improve the brightness and brightness of the color master batch. Along with the development of science and technology, brightening agents are applied in more and more industries. To obtain a bright coating, the selection of the brightener is the key to the process, and it should have: (1) the stability of the plating solution is better, and a certain deposition rate and a certain service cycle can be maintained; (2) the coating has obvious brightening effect; (3) the original performance of the plating layer can not be reduced; (4) the raw materials have simple composition, proper price and easy popularization and use. However, the operation temperature of the chemical nickel plating system is generally high, and a large amount of hydrogen is continuously separated out from the surface of a substrate in the plating solution, particularly, unlike electroplating, the substrate is not polarized by a cathode, and an electroplating brightener cannot be directly applied to chemical plating, so that the selection of a proper chemical plating brightener is very important.

Disclosure of Invention

In order to solve the problems, the invention provides a brightener for VCP electroplating and a preparation method thereof, the brightener for VCP electroplating has good brightness, is not easy to oxidize and is convenient to use, and the content of the brightener is as follows:

the invention aims to provide a brightener for VCP electroplating, which is characterized in that: the brightener for VCP electroplating comprises the following components in parts by weight: 5-8 parts of leveling agent, 10-20 parts of poly (chloropropylene oxide) amine, 1-3 parts of curing agent, 2-3 parts of citric acid, 2-3 parts of boric acid, 0.1-0.3 part of chelating agent and 75-88 parts of deionized water.

In some embodiments of the present invention, the leveling agent is a mixture of basic yellow and polymeric alizarin alcohol blue dye, and the weight ratio of the basic yellow to the polymeric alizarin alcohol blue dye is 1: 1-3.

In some embodiments of the present invention, the poly (epichlorohydrin) amine is synthesized by using dimethylamine, tertiary amine and epichlorohydrin as raw materials and adding polyethylene polyamine as a crosslinking agent.

In some embodiments of the present invention, the preparation method of the poly (chloropropylene oxide) amine comprises: adding a mixed solution of 30-35 wt% of dimethylamine solution and tertiary amine into a reaction kettle at the constant temperature of 20-40 ℃, slowly dripping epichlorohydrin while stirring, reacting at the constant temperature of 20-40 ℃ for 30-60min after dripping is finished, finally adding polyethylene polyamine, continuously stirring, slowly heating to 60-80 ℃, and reacting for 30-60min to obtain the poly (chloropropylene oxide) amine.

In some embodiments of the present invention, the curing agent is hexamethylene diisocyanate.

In some embodiments of the invention, the chelating agent is a mixture of EDTA-2Na and glycolic acid, and the weight ratio of EDTA-2Na to glycolic acid is 1-3: 1.

It is another object of the present invention to provide a method for preparing a brightener for VCP plating, comprising the steps of:

the method comprises the following steps: adding deionized water and a chelating agent into a container to be dissolved completely to obtain a mixture A;

step two: adding the poly (chloropropylene oxide) amine, the curing agent and the leveling agent into the mixture A obtained in the step one, and dissolving until the mixture is completely dissolved to obtain a mixture B;

step three: and adding citric acid and boric acid into the mixture B in the second step to be dissolved completely to obtain the brightening agent for VCP electroplating.

Compared with the prior art, the invention has the beneficial effects that:

the brightener for VCP electroplating contains a leveling agent, polyepoxy chloropropane amine, a curing agent, citric acid, boric acid and a chelating agent, wherein a weakly acidic substance citric acid and boric acid are mixed to effectively remove an oxidant on the surface of a plating layer without coating, the addition of the polyepoxy chloropropane amine can effectively remove dirt on the surface of the plating layer, and the addition of other components ensures that the formula of the brightener is reasonable and effective in components, the preparation process is pollution-free, environment-friendly and safe, and the brightener has the advantages of good brightness, difficult oxidation, convenient use, good electroplating quality, high brightness of the plating layer, stability, durability and no color change, and has wide popularization and application values and good economic and social benefits.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below so that those skilled in the art can better understand the advantages and features of the present invention, and thus the scope of the present invention will be more clearly defined. The embodiments described herein are only a few embodiments of the present invention, rather than all embodiments, and all other embodiments that can be derived by one of ordinary skill in the art without inventive faculty based on the embodiments described herein are intended to fall within the scope of the present invention.