CN105238587A - Low-greenhouse-effect environment-friendly cleaning agent alternative application - Google Patents

Abstract

The invention provides a solvent-type azeotropic precision electronic cleaning agent with 1,2-transdichloroethylene as a main component. The cleaning agent is a final alternative for ozone-depleting substances. The cleaning agent causes low greenhouse effect, and accords with the Occupational Disease Prevention Law. The cleaning agent is a clean production key technology product. The environment-friendly cleaning agent alternative application scheme intends to satisfy the demands of green suppliers at a current technical stage on a basis of completely satisfying the environment policy of our nation as a developing country and meeting more strict policies of developed countries, such as the REACH standard of the European Union, the ACGIH health requirements of the US, and the air pollution regulations of Japan. Compared to prior arts, the application provided by the invention has the advantage that a flashpoint problem of the application of pure 1,2-transdichloroethylene is solved, and the cleaning agent can be directly used in existing cleaning equipment; an occupational disease problem of currently used ODS alternatives is solved; the substitution of greenhouse effect cleaning agents with excessively high GWP is solved; and the cleaning agent can be used for substituting high-cost cleaning agents, such that a purpose of reducing cost can be achieved.

Description

Freezer compartment effect environment-friendly cleaning agent alternative applications

Technical field

This environment-friendly cleaning agent for major ingredient, belongs to the final substitute of ozone deleting substance with 1,2-trans-dichloroethylene, is also a kind of freezer compartment effect and the solvent-borne type azeotropic precise electronic clean-out system meeting law on prevention and cure of occupational disease simultaneously.Belong to cleaner production gordian technique product.

Background technology

Precise electronic cleaning technique application surface widely, such as in the application of the removal of the soldering fluxs such as electronic devices and components, PCBa plate, thick film circuit, lead frame, because different production technique can cause the different purging method of follow-up employing to reach the requirement of cleanliness factor.Under the big frame of Montreal Agreement, country has formulated the replacement time table of CFC freonll-11 and HCFC transitional product thereof; Meanwhile, for the concern of climate warming, in global range, seeking the cleaning program of more low-carbon emission always.

Author has followed the tracks of the cleaning substitute technology in global range, there is Railway Project: one is high cost in the solvent-borne type substitute of current CFC and HCFC; Two is when paying close attention to ozone layer destroying, also needs the climate change that concern Greenhouse effect cause; Three is the refinements along with new legislation, more pays close attention to the impact on health, and some composition lists European Union SVHC and the sick category of Occupational in; Four is the upgradings along with electronic product, clean-out system is brought equally to the challenge of upgrading.

Summary of the invention

Azeotrope or the near-azeotrope of this environment-friendly cleaning agent to be a kind of with 1,2-trans-dichloroethylene be main component, without flash-point, meet environmental protection, low toxicity, the requirement of freezer compartment effect.For different cleaning workpieces, can suitably adjusting process to meet the requirement of cleaning degree.

1,2-trans-dichloroethylene is with a kind of final substitute meeting the ozone deleting substance of environmental regulation, has extremely low Greenhouse effect potential.Safety factors considers that its TWA exposure concentrations is 200ppm. but its flash-point 6.1 ° of C, can not use in the ultrasonic wave vapour phase cleaning of routine.So this practical plan utilizes its advantages characteristic, with it for major ingredient, with other raw material advantageous combination, producing does not have flash-point, is suitable for the cleaning machine directly substituted in existing use, saves equipment replacement cost.Meanwhile, due to the diversity of electronic devices and components, need to consider material compatibility.

May be used for substituting:

I> n-Propyl Bromide is the clean-out system of main component: have very superior cleansing power, and ODP value, GWP value are all very low.But because n-Propyl Bromide belongs to SVHC, U.S. ACGIH is adjusted to 0.1ppm safe for its TWA exposure value, and China is classified as it as occupational illness category.Consider health factor, substitutive demand strongly.

Ii>HFC/HFE class clean-out system: ODP is zero.But its GWP is too high, high cost, and solvency power is weak.For general products production, the increase of cleaning cost cannot be born.

Iii>HCFC class: China is performing in the timetable process of progressively eliminating.

The technical scheme adopted:

1 > clean-out system composition: a>1,2-trans-dichloroethylene, about 50-99% mass percent; B> alcohols, about 0.5-50% mass percent; C> fluorinated hydrocarbons, 0.5-50% mass percent; D> tensio-active agent, at least 0.001% mass percent.

2 > clean-out systems form in 1 >: the mass percent of 1,2-trans-dichloroethylene can be 80-98%.

3 > clean-out systems form in 1 >: the mass percent of 1,2-trans-dichloroethylene can be 88-95%.

4 > clean-out systems form in 1 >: the fatty alcohol of single hydrogen bond selected by alcohol.These alcohol comprise the methyl alcohol of C1-C5, ethanol, Virahol, n-propyl alcohol, isopropylcarbinol, propyl carbinol, amylalcohol and isomer thereof.

5 > clean-out systems form in 1 >: the mass percent of fluorinated hydrocarbons can be 10-30%.

6 > clean-out systems form in 1 >: the mass percent of fluorinated hydrocarbons can be 30-50%.

7 > clean-out systems form in 1 >: the kind of available fluorinated hydrocarbons comprises fluoro aliphatic hydrocarbon, fluoro aromatic hydrocarbon, fluoro aliphatic ether, fluoro aromatic oxide, fluoroolefins.

8 > state in 7>, and in hydrofluoric ether, amount of carbon atom is at C4-C7, fluorine atom amount at F5-F16, Sauerstoffatom quantity 0,1.

9 > clean-out systems form tensio-active agent in 1 > and comprise nonionic surface active agent, fluorochemical surfactant, the amido product that lipid acid and amine react.

10 > state the nonionic surface active agent in 9>, are can be biodegradable, comprise polyethylene oxide base alkyl oxide, and alkyl phenyl ethers etc.

11 > cleanings: the techniques such as solvent-borne type precise cleaning agent can be applied to the cleaning of ultrasonic wave vapour phase, immersion is washed, clean by hand, spray is washed, can realize recycle, not need follow-up drying process, productive temp is quick.Can according to the requirement of product cleanliness factor, adjusting process.

Claims (3)

1. azeotrope or the near-azeotrope of this environment-friendly cleaning agent to be a kind of with 1,2-trans-dichloroethylene be main component, without flash-point, meet environmental protection, low toxicity, freezer compartment effect.

2. as claimed in claim 1:may be used for substituting: n-Propyl Bromide is the clean-out system of main component, have very superior cleansing power, ODP value, GWP value are all very low.

3. as claimed in claim 1also may be used for alternative HFC/HFE class clean-out system HCFC class clean-out system.