CN105689638A - Water-based aluminum alloy die-casting mold releasing agent and preparation method thereof - Google Patents

Abstract

The invention discloses a water-based aluminum alloy die-casting mold releasing agent. The water-based aluminum alloy die-casting mold releasing agent is prepared from the following components in percentage by mass: 100 to 150 parts of modified organic silicone oil, 10 to 20 parts of oxidized polyethlene wax, 10 to 15 parts of isotridecanol polyoxyethylene ether, 8 to 10 parts of long-chain fatty alcohol polyoxyethylene ether, 10 to 15 parts of tween and 500 to 800 parts of deionized water. In addition, the invention also discloses a preparation method of the water-based aluminum alloy die-casting mold releasing agent. The preparation method comprises the following steps of firstly, heating and melting the long-alkyl-chain phenyl modified organic silicone oil, the oxidized polyethlene wax, the isotridecanol polyoxyethylene ether, the long-chain fatty alcohol polyoxyethylene ether and the tween; secondly, uniformly stirring the components, and cooling to 55 to 75DEG C; and thirdly, slowly dropping the deionized water in batches and then stirring for half an hour, thus obtaining a finished product. The water-based releasing agent prepared by the preparation method disclosed by the invention can be used for producing die-casting metal products such as an aluminum alloy and is good in releasing performance; and the surface quality of products can be effectively improved, and the smooth finish and the integrity of castings are improved.

Description

A kind of water base aluminium alloy compression casting releasing agent and preparation method thereof

Technical field

The invention belongs to foundry facing and synthesis technology field thereof, be specifically related to a kind of water base aluminium alloy compression casting releasing agent and preparation method thereof。

Background technology

Die casting is the important support of auto industry, electronic product industry。Releasing agent is to produce the requisite auxiliary agent of die cast metal product。Its Main Function is to aid in die cast metal product and can be removed from the molds, and makes product keep integrity and post-treatment。Wherein the water based mold release agent of emulsion form is compared with traditional oil base releasing agent, have good cooling results, do not produce to pile up, surface quality of continuous castings is good, contribute to reducing internal porosity and use the advantages such as safe and clean, pollution-free, is current casting mold-releasing agent main product。

The die cast metal releasing agent of domestic market, is broadly divided into two class: one carrys out the import releasing agent as the U.S., Japan and other countries。The demolding performace of import releasing agent is good, and casting of appearance of cast is almost without defect；Emulsifying effectiveness is good, during dilute with water, without oil-water separation phenomenon；Sense organ is good, and container is pollution-free。Because its price is high, mainly used by joint venture and some brand enterprises。Two is domestic releasing agent, and demolding performace is better, but emulsifying effectiveness is undesirable。Domestic releasing agent ubiquity film forming fineness is poor, and emulsion is unstable and the problem such as unstable product quality so that more domestic larger die casting producers still use import releasing agent product so far。In order to solve above-mentioned technical problem, the present invention comes therefrom。

Summary of the invention

Present invention aim at providing that a kind of highly diluted is better than, emulsifying effectiveness, stable performance, aqueous aluminium alloy compression casting releasing agent that film-formation result is good and preparation method thereof。This releasing agent can long term storage and use, the preparation method step of this releasing agent is simple simultaneously, and raw material is easy to get。

First aspect present invention solves technical problem and be the technical scheme is that a kind of water base aluminium alloy compression casting releasing agent, and it is made up of the component of following mass ratio: 100-150 part modification organic silicon oil, 10-20 part OPE, 10-15 part isomery ten polyoxyethylenated alcohol, 8-10 part long-chain fat polyoxyethylenated alcohol, 10-15 part tween, 500-800 part deionized water。

Preferably, described modification organic silicon oil selected from the long phenyl modified organic silicone oil of alkane chain, polyether modified silicon oil, hydroxyl modification silicone oil a kind of or two or more combination in any。

Preferably, described OPE is selected from any one OPE of fusing point 98-100 DEG C or 100-120 DEG C。

Preferably, described long-chain fat polyoxyethylenated alcohol is selected from AEO7, AEO8 or AEO9。

Preferably, described tween is Tween 80。

The preparation method that a second aspect of the present invention provides a kind of water base aluminium alloy compression casting releasing agent, it comprises the steps:

(1) take modification organic silicon oil, OPE, isomery ten polyoxyethylenated alcohol, long-chain fat polyoxyethylenated alcohol, tween, said components is mixed post-heating and melts；

(2) then stir, cool to 55 DEG C-75 DEG C,

(3) then it is slowly dropped into deionized water in batches, is stirred for uniformly preparing。

Preferably, described step (2) stirs 0.5-2 hour at 2000-3000 rev/min, cools to 60 DEG C。

By technique scheme, the present invention utilizes that the system of the releasing agent that composite emulsifier synergism makes to prepare is homogeneous, composition not free settling and become mould effective。

OPE, also known as OPE wax, it is low that OPE wax has viscosity, softening point is high, the properties such as hardness is good, avirulence, Heat stability is good, high-temperature volatile is low, to filler, the dispersibility of pigment is splendid, existing extremely excellent external lubricity, there is again stronger internal lubrication effect, also there is coupled action, the production efficiency of plastic processing can be improved, reduce production cost, the good compatibility is had with vistanex etc., anti humility performance at normal temperatures is good, chemical-resistant resistance ability is strong, electrical property is excellent, finished appearance can be improved, it is replace montanin wax, river wax, liquid paraffin, microcrystalline wax, natural paraffin wax, the ideal product of Tissuemat E etc.。

Isomery ten polyoxyethylenated alcohol belongs to isomery alcohol ether, is efficient dispersant, wetting agent and emulsifying agent, without benzene ring structure, is the succedaneum that in textile auxiliary and detergent, alkylphenol polyoxyethylene is excellent。

Fatty alcohol-polyoxyethylene ether (AEO), is also called polyoxyethylene aliphatic alcohol ether。It it is kind with fastest developing speed in nonionic surfactant, that consumption is maximum。Such surfactant is by the ether of Polyethylene Glycol (PEG) Yu fatty alcohol condensation, represent by below general formula: RO (CH2CH2O) nH, wherein n is the degree of polymerization, has different kinds because the degree of polymerization of Polyethylene Glycol is different with the kind of fatty alcohol。Commodity are called Brij (Brij), as Brij30 and Brij is formed by different number of Polyethylene Glycol and lauric acid polycondensation, and all can as O/W type emulsifying agent。When carbochain R is C7～9, during n=5, the fatty alcohol-polyoxyethylene ether of generation is industrially called penetrating agent JFC (PenetratingagentJFC)。

Tween (or Polysorbate) is nonionic surfactant, has foreign odor, warm and micro-hardship, is the partial fatty acid ester of a series of polyoxyethylene sorbitan。It is widely used as the solubilizing agent of emulsifying agent and oily substance。Tween 80 is oleate。

Preferably, a kind of preparation method of water base aluminium alloy compression casting releasing agent, it comprises the steps: modification organic silicon oil, OPE, isomery ten polyoxyethylenated alcohol, long-chain fat polyoxyethylenated alcohol, Tween 80 are added heat fusing, then half an hour is stirred at 2000-3000 rev/min, cool to about 60 DEG C, then it is slowly dropped into deionized water in batches, is stirred for preparing half an hour。

Advantages of the present invention and providing the benefit that:

(1) present invention is by carrying out rational allocation as high efficiency composition emulsifying agent, by studying reasonable combination and the proportioning of various component, mixing the metal mold release agent with excellent demolding performace, the water base casting mold-releasing agent that the present invention produces has the advantages that highly diluted is more excellent than, easy emulsifying, stripping result。

(2) water based mold release agent prepared by the present invention may be used for the production of the die-cast metal products such as aluminium alloy, and demolding performace is good, can effectively improve cast product surface quality, improves foundry goods fineness and integrity。

Detailed description of the invention

Below in conjunction with specific embodiment, such scheme is described further。Should be understood that these embodiments to be an illustration for the present invention and be not limited to restriction the scope of the present invention。The implementation condition adopted in embodiment can do further adjustment according to the condition of concrete producer, and not marked implementation condition is generally the condition in normal experiment。

Embodiment 1

Described water based mold release agent consisting of in mass ratio: 100 parts long phenyl modified organic silicone oils of alkane chain, 10 parts of fusing points are 100-120 DEG C of OPE, 10 parts of isomery ten polyoxyethylenated alcohol, 8 parts of AEO9,10 parts of Tween 80s, 500 parts of deionized waters。

By the long phenyl modified organic silicone oil of alkane chain, OPE, isomery ten polyoxyethylenated alcohol, long-chain fat polyoxyethylenated alcohol, tween, said components is mixed post-heating so as to melt, and 2000-3000 rev/min stirring half an hour, cool to about 60 DEG C, then it is slowly dropped into deionized water in batches, is stirred for preparing half an hour。

Embodiment 2

Described water based mold release agent consisting of in mass ratio: 150 parts long phenyl modified organic silicone oils of alkane chain, 15 parts of 98-100 DEG C of OPEs, 15 parts of isomery ten polyoxyethylenated alcohol, 10 parts of AEO9,10 parts of Tween 80s, 700 parts of deionized waters。

Preparation method is with embodiment 1。

Comparative example

Described water based mold release agent consisting of in mass ratio: 150 parts of silicone oil, 15 parts of 98-100 DEG C of OPEs, 15 parts of isomery ten polyoxyethylenated alcohol, 10 parts of AEO9,10 parts of Tween 80s, 700 parts of deionized waters。

Preparation method is with embodiment 1。

The Performance of casting mold-releasing agent prepared by embodiment and common silicone oil

Demolding performace detection method is: casting mold-releasing agent deionized water dilutes (here dilution 150 times) by a certain percentage, diluent even application is being heated on 280 DEG C of steel plates polished smooth, spraying steel plate releasing agent partial insertion molten aluminum liquid in 5 seconds, take out after 15 seconds。

Evaluation releasing agent performance standard: pressing grade distinguishing demolding performace with plate quality change after leaching aluminum, the demolding performace that after leaching aluminum, quality increase is few is good, otherwise then poor。Assuming that not soaking aluminum front spring quality is m1, after leaching aluminum, quality increases to m2, then before and after leaching aluminum, plate quality increases percent is G=(m2-m1)/m1 × 100%。When G≤0.1%, performance is excellent；0.1% < during G≤0.5%, performance is good；During G >=0.5%, during performance is。

Application Contrast on effect is as shown in the table:

By the casting mold-releasing agent contrast prepared with common silicone oil it can be seen that releasing agent provided by the invention has highly diluted ratio, composition not free settling, the feature that has good demoulding property。

Examples detailed above only for technology design and the feature of the present invention are described, its object is to allow person skilled in the art be able to understand present disclosure and implement according to this, can not limit the scope of the invention with this。All equivalent transformations done according to spirit of the invention or modification, all should be encompassed within protection scope of the present invention。

Claims (7)

1. a water base aluminium alloy compression casting releasing agent, it is characterized in that, it is made up of the component of following mass ratio: 100-150 part modification organic silicon oil, 10-20 part OPE, 10-15 part isomery ten polyoxyethylenated alcohol, 8-10 part long-chain fat polyoxyethylenated alcohol, 10-15 part tween, 500-800 part deionized water。

2. water base aluminium alloy compression casting releasing agent according to claim 1, it is characterised in that described modification organic silicon oil selected from the long phenyl modified organic silicone oil of alkane chain, polyether modified silicon oil, hydroxyl modification silicone oil a kind of or two or more combination in any。

3. water base aluminium alloy compression casting releasing agent according to claim 1, it is characterised in that described OPE is selected from any one OPE of fusing point 98-100 DEG C or 100-120 DEG C。

4. water base aluminium alloy compression casting releasing agent according to claim 1, it is characterised in that described long-chain fat polyoxyethylenated alcohol is selected from AEO7, AEO8 or AEO9。

5. water base aluminium alloy compression casting releasing agent according to claim 1, it is characterised in that described tween is Tween 80。

6. prepare the method for aluminium alloy compression casting releasing agent as described in any one of claim 1-5 for one kind, it is characterised in that said method comprising the steps of:

(1) taking modification organic silicon oil, OPE, isomery ten polyoxyethylenated alcohol, long-chain fat polyoxyethylenated alcohol, tween, mixing post-heating melts；

(2) then said components is stirred, cools to 55 DEG C-75 DEG C,

(3) then it is slowly dropped into deionized water in batches, is stirred for uniformly preparing。

7. method according to claim 6, it is characterised in that described step (2) stirs 0.5-2 hour at 2000-3000 rev/min, cools to 60 DEG C。