阅读说明：本技术 一种金属粘合剂及生产工艺 (Metal adhesive and production process thereof ) 是由 庄玉根 庄婕 于 2021-11-24 设计创作，主要内容包括：本发明公开了一种金属粘合剂及生产工艺,旨在提供一种可以对于金属件于高温下粘接,使得金属件粘接时具有充足调整时间的金属粘合剂及其生产工艺；金属粘合剂,按照重量分配,由70％-80％的羟基聚酯树脂、5％-10％的甲醚化三聚氰胺树脂、2％-6％的环氧聚丁二烯、1％-3％的纳米二氧化硅、7％-15％的纳米硫酸锌、1％-4％的对甲苯磺酸、0.3％-0.7％的消泡剂及1％-2％的流平剂构成。(The invention discloses a metal adhesive and a production process thereof, aiming at providing a metal adhesive which can be used for bonding metal pieces at high temperature and has sufficient adjustment time when the metal pieces are bonded and a production process thereof; the metal adhesive comprises, by weight, 70% -80% of hydroxyl polyester resin, 5% -10% of methylated melamine resin, 2% -6% of epoxy polybutadiene, 1% -3% of nano-silica, 7% -15% of nano-zinc sulfate, 1% -4% of p-toluenesulfonic acid, 0.3% -0.7% of defoaming agent and 1% -2% of leveling agent.)

1. The metal adhesive is characterized by comprising, by weight, 70% -80% of hydroxyl polyester resin, 5% -10% of methylated melamine resin, 2% -6% of epoxy polybutadiene, 1% -3% of nano silicon dioxide, 7% -15% of nano zinc sulfate, 1% -4% of p-toluenesulfonic acid, 0.3% -0.7% of defoaming agent and 1% -2% of leveling agent.

2. The metal adhesive as claimed in claim 1, wherein the hydroxyl polyester resin accounts for 75% of the total amount, the methylated melamine resin accounts for 6% of the total amount, the epoxy polybutadiene accounts for 3% of the total amount, the nano silica accounts for 2% of the total amount, the nano zinc sulfate accounts for 10% of the total amount, the p-toluenesulfonic acid accounts for 2% of the total amount, the defoaming agent accounts for 0.5% of the total amount, and the leveling agent accounts for 1.5% of the total amount.

3. A production process for working the metal adhesive of claim 1, comprising the steps of:

s1, pouring hydroxyl polyester resin, nano silicon dioxide, nano zinc sulfate and a defoaming agent into a first cold circulation stirring barrel and stirring for 15 minutes;

s2, feeding the stirred material in the step S1 into a ceramic grinding machine for grinding for 30 minutes,

s3, inputting the ground material in the step S2 into a second cold circulation stirring barrel, adding methylated melamine resin, epoxy polybutadiene, p-toluenesulfonic acid and a leveling agent, and finally stirring for 10 minutes.

4. The process for producing a metal adhesive according to claim 3, wherein the first cold circulation agitator and the second cold circulation agitator are each double-layered.

5. The process for producing a metal adhesive as claimed in claim 3 or 4, wherein the stirring paddle of the first cold circulation stirring barrel is rotated at a speed of 500-700 rpm.

6. The process for producing a metal adhesive as defined in claim 3 or 4, wherein the stirring paddle of the second cold circulation stirring barrel is rotated at a speed of 500-700 rpm.

Technical Field

The invention relates to the technical field of adhesives, in particular to a metal adhesive and a production process thereof.

Background

The metal adhesive is a single-component, low-viscosity, transparent and normal-temperature fast-curing adhesive. Also known as metal glue. The adhesive has wide adhesive surface and good adhesive capacity to most materials, and is one of important room temperature curing adhesives.

The existing metal adhesive on the market has the disadvantages of over-high reaction speed and low temperature resistance (less than 70 ℃), insufficient time for adjusting the metal parts in advance during bonding, and easy error in bonding between the metal parts, so that the metal adhesive has certain limitation; the adhesive is suitable for metal bonding in the market, and particularly suitable for alloy metal bonding.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a metal adhesive which can be used for bonding metal parts at high temperature and has sufficient adjustment time when the metal parts are bonded, and a production process thereof.

In order to achieve the purpose, the invention provides the following technical scheme:

the metal adhesive consists of hydroxyl polyester resin 70-80 wt%, methylated melamine resin 5-10 wt%, epoxy polybutadiene 2-6 wt%, nanometer silica 1-3 wt%, nanometer zinc sulfate 7-15 wt%, p-toluene sulfonic acid 1-4 wt%, defoaming agent 0.3-0.7 wt% and leveling agent 1-2 wt%.

Furthermore, the hydroxyl polyester resin accounts for 75% of the total amount, the methylated melamine resin accounts for 6% of the total amount, the epoxy polybutadiene accounts for 3% of the total amount, the nano silicon dioxide accounts for 2% of the total amount, the nano zinc sulfate accounts for 10% of the total amount, the p-toluenesulfonic acid accounts for 2% of the total amount, the defoaming agent accounts for 0.5% of the total amount, and the leveling agent accounts for 1.5% of the total amount.

Further, a production process for processing a metal adhesive, comprising the steps of:

s1, pouring hydroxyl polyester resin, nano silicon dioxide, nano zinc sulfate and a defoaming agent into a first cold circulation stirring barrel to be stirred for 15 minutes, and rotating a stirring paddle of the first cold circulation stirring barrel at the speed of 500-700 revolutions per minute so as to uniformly stir a plurality of materials; the first cold circulation stirring barrel is double-layer and comprises an upper stirring paddle and a lower stirring paddle, the two stirring paddles are used for stirring materials in the stirring barrel together, blades of the stirring blades are arranged obliquely to generate a vortex effect, so that solid materials deposited at the bottom of the stirring barrel can be beaten upwards, the materials can be fully stirred by the upper stirring blade and the lower stirring blade, the stirring effect is improved, and various materials are uniformly mixed together;

s2, the stirred materials in the step S1 are sent into a ceramic grinding machine through an air pump to be ground for 30 minutes, so that large particles in the materials are ground, and the materials are mixed together more fully and uniformly;

s3, inputting the ground material in the step S2 into a second cold circulation stirring barrel by an air pump, then adding the methylated melamine resin, the epoxy polybutadiene, the p-toluenesulfonic acid and the flatting agent, and finally stirring for 10 minutes, wherein a stirring paddle of the second cold circulation stirring barrel rotates at the speed of 500-700 revolutions per minute. The second cold circulation stirring barrels are double-layer; the various materials are thoroughly mixed together to ultimately form the metal adhesive.

By adopting the technical scheme, the invention has the beneficial effects that:

1. the metal adhesive can not react at 80 ℃ and can be cured at the high temperature of 200 ℃, so that after the metal adhesive is coated on a metal piece, the metal adhesive can be adjusted at the normal temperature, and then the metal adhesive is cured and bonded in the high-temperature environment, thereby greatly avoiding the error generated when the metal piece is bonded;

2. the metal adhesive of the invention starts to degum under the condition of 300 ℃, and when the temperature reaches 400 ℃, the metal piece bonded by the adhesive realizes complete degum;

3. the metal adhesive has good bonding effect and can bond most of metals;

4. the production process of the metal adhesive is simple, the processing efficiency is high, and the yield of the metal adhesive is greatly improved;

5. the metal adhesive can be constructed in the modes of spraying, brushing and the like, and the bonding of metal pieces is realized.

Drawings

FIG. 1 is a graph of the performance of a metal adhesive at different temperatures for example one.

FIG. 2 is a graph of the performance of the metal adhesive at different temperatures for case two.

Fig. 3 is a graph of the performance of the metal adhesive at different temperatures for case three.

Detailed Description

The invention is further described with reference to fig. 1-3.

A metal adhesive and its production process are disclosed, which can bond metal parts at high temp. for sufficient regulation time.

Case one:

the metal adhesive comprises, by weight, 70% of hydroxy polyester resin, 10% of methylated melamine resin, 4% of epoxy polybutadiene, 1% of nano-silica, 10% of nano-zinc sulfate, 4% of p-toluenesulfonic acid, 0.3% of defoaming agent and 0.7% of leveling agent.

Case two:

the metal adhesive comprises, by weight, 75% of hydroxyl polyester resin, 6% of methylated melamine resin, 3% of epoxy polybutadiene, 2% of nano silicon dioxide, 10% of nano zinc sulfate, 2% of p-toluenesulfonic acid, 0.5% of defoaming agent and 1.5% of leveling agent.

Case three:

the metal adhesive comprises, by weight, 80% of hydroxyl polyester resin, 5% of methyl etherified melamine resin, 1% of epoxy polybutadiene, 3% of nano silicon dioxide, 7% of nano zinc sulfate, 2% of p-toluenesulfonic acid, 0.7% of defoaming agent and 1.3% of leveling agent.

From tables 1-3, the properties of the metal adhesives in cases 1-3 were derived by experiments at different temperatures and for peel strengths of different materials: the metal adhesive can not react at 80 ℃ and can be cured at the high temperature of 200 ℃, so that after the metal adhesive is coated on a metal piece, the metal adhesive can be adjusted at the normal temperature, and then the metal adhesive is cured and bonded in the high-temperature environment, thereby greatly avoiding the error generated when the metal piece is bonded; the metal adhesive starts to come unstuck at 300 ℃, and when the temperature reaches 400 ℃, the metal pieces bonded by the adhesive realize complete degumming.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and those skilled in the art should be able to make general changes and substitutions within the technical scope of the present invention.