CN109957281A

CN109957281A - A kind of aqueous UV paint stripper and preparation method thereof

Info

Publication number: CN109957281A
Application number: CN201910209203.4A
Authority: CN
Inventors: 郭少超
Original assignee: Xiamen Sfozerui Technology Co Ltd
Current assignee: Xiamen Sfozerui Technology Co Ltd
Priority date: 2019-03-19
Filing date: 2019-03-19
Publication date: 2019-07-02
Anticipated expiration: 2039-03-19
Also published as: CN109957281B

Abstract

The invention discloses a kind of aqueous UV paint strippers, are made of 35~45 parts of main solvents of mass fraction, 25~35 parts of cosolvents, 5~10 parts of promotors, 0.5~1 part of surfactant, surplus is deionized water；The main solvent is the solvent combination of benzyl alcohol, aniline and dimethyl sulfoxide, quality proportioning are as follows: aniline: dimethyl sulfoxide=5~7:1~3:2~3, the cosolvent is the solvent combination of ethylene glycol and methanol, quality proportioning are as follows: ethylene glycol: methanol=1~2:3~4；The promotor is phenol, and the surfactant is neopelex.The invention also discloses the preparation methods of above-mentioned aqueous UV paint stripper.The present invention provides a kind of aqueous UV paint stripper and preparation method thereof, and preparation is simple, and low in cost, paint removing effect is good, does not hurt plastic rubber substrate, is free of soda acid, especially can sufficiently realize the purpose of depainting recoating without any corrosiveness to almag.

Description

A kind of aqueous UV paint stripper and preparation method thereof

Technical field

The present invention relates to depainting technical field, in particular to a kind of watery paint remover and preparation method thereof.

Background technique

As digital product increasingly updates, the requirement to product appearance is also higher and higher, in order to meet consumer's Appearance requirement, the coating quality of digital product also increasingly improve, and coating process also becomes to become increasingly complex therewith, outside mobile phone The coating of shell, frame etc..Since phone housing, frame are mostly plastic basis material, and mobile phone frame majority is that aluminium alloy or magnalium close Gold filling injection-moulded plastic composition, coating is mostly UV coating, and paint stripper traditional at present is mostly using methylene chloride as main solvent, right Plastic bottom material is corrosive, and is unable to satisfy requirement of the depainting without hurting ground.Meanwhile defective products is sprayed due to the place that cannot get well Reason, can only scrap, cause the great wasting of resources

Summary of the invention

In view of the above-mentioned problems, the purpose of the present invention is to provide one kind not to hurt ground and the good aqueous UV depainting of paint removing effect Agent and preparation method thereof, in the presence of solving the problems, such as background technique.

To achieve the goals above, The technical solution adopted by the invention is as follows:

A kind of aqueous UV paint stripper, by 35~45 parts of main solvents of mass fraction, 25~35 parts of cosolvents, 5~10 parts of promotions Agent, 0.5~1 part of surfactant composition, surplus is deionized water；

The main solvent is the solvent combination of benzyl alcohol, aniline and dimethyl sulfoxide, quality proportioning are as follows: dimethyl is sub- Sulfone: aniline=5~7:1~3:1.5~3, the cosolvent are the solvent combination of ethylene glycol and methanol, quality proportioning are as follows: second Glycol: methanol=1~2:3~4.

Further, the promotor is phenol.

Further, the surfactant is neopelex.

The invention also discloses a kind of preparation methods of aqueous UV paint stripper, include the following steps:

S1, enough deionized waters are weighed, 0.5~1 part of mass fraction of surfactant is added, be sufficiently stirred until complete Fully dissolved obtains basal liquid；

S2,35~45 parts of main solvents of mass fraction are added in above-mentioned basal liquid and stir evenly, obtain intermediate fluid；Described Main solvent is the solvent combination of benzyl alcohol, aniline and dimethyl sulfoxide, quality proportioning are as follows: dimethyl sulfoxide: aniline=5~7:1 ~3:1.5~3；

S3,25~35 parts of cosolvents of mass fraction are added in above-mentioned intermediate fluid, stirring to solution is in limpid regardless of stratiform State；The cosolvent is the solvent combination of ethylene glycol and methanol, quality proportioning are as follows: ethylene glycol: methanol=1~2:3~4；

S4, be formed by step S3 and be slowly added 5~10 parts of mass fraction of promotor in solution, be sufficiently stirred until Transparent liquid condition to get arrive finished product.

Further, surfactant used in step S1 is neopelex.

Further, promotor used in step S4 is phenol.

The invention has the following beneficial effects: the benzyl alcohols in 1, main solvent to have molecular weight small, good penetrability, small toxicity The high feature with boiling point is the ideal substitute of methylene chloride, and aniline and the sulfur-containing compound dimethyl for being equipped with low molecular weight are sub- Sulfone can be such that penetrating power significantly reinforces, and achieve the purpose that rapid osmotic paint film and be swollen；2, the use of cosolvent can cooperate with master Solvent penetration paint film increases the solubility property of main solvent, accelerates depainting rate, and can play solubilizing effect to paint-removing liquid, keeps de- Paint the stability of agent, the case where avoiding stratification generation；3, the addition of phenol can accelerate the failure macromolecular chain segment, improve depainting Efficiency；The addition of deionized water not only reduces cost, and paint film and substrate can also be followed by entered after solvent penetration paint film Between, keep paint film swelling more thorough.The paint stripper made of the above ingredient only needs soak at room temperature, without heating, to UV coating There is good paint removing effect and does not go up plastics and almag.

Specific embodiment

With reference to embodiment, the present invention will be further described.

The present invention uses 35~45 parts of main solvents of mass fraction, 25~35 parts of cosolvents, 5~10 parts of promotors, 0.5~1 Part surfactant and ionized water are that raw material make aqueous UV paint stripper.Wherein, cosolvent is the solvent of ethylene glycol and methanol Combination, quality proportioning are as follows: ethylene glycol: methanol=1~2:3~4.

Embodiment one

A kind of formula of aqueous UV paint stripper of the invention, including 35 parts of main solvents of mass fraction, 25 parts of cosolvents, 5 parts Promotor and 0.5 part of surfactant, surplus are ionized water, wherein cosolvent is the solvent combination of ethylene glycol and methanol, quality Proportion are as follows: ethylene glycol: methanol=1:3, promotor are phenol, and surfactant is neopelex.

Embodiment two

A kind of formula of aqueous UV paint stripper, including 35 parts of main solvents of mass fraction, 35 parts of cosolvents, 10 parts of promotors and 1 part of surfactant, surplus are ionized water, wherein cosolvent is the solvent combination of ethylene glycol and methanol, quality proportioning are as follows: second Glycol: methanol=1:3, promotor are phenol, and surfactant is neopelex.

Embodiment three

A kind of formula of aqueous UV paint stripper, including 45 parts of main solvents of mass fraction, 35 parts of cosolvents, 10 parts of promotors and 0.5 part of surfactant, surplus are ionized water, wherein cosolvent is the solvent combination of ethylene glycol and methanol, quality proportioning are as follows: Ethylene glycol: methanol=2:3, promotor are phenol, and surfactant is neopelex.

Example IV

A kind of formula of aqueous UV paint stripper, including 45 parts of main solvents of mass fraction, 25 parts of cosolvents, 5 parts of promotors and 1 Part surfactant, surplus is ionized water, wherein cosolvent is the solvent combination of ethylene glycol and methanol, quality proportioning are as follows: second two Alcohol: methanol=1:4, promotor are phenol, and surfactant is neopelex.

Embodiment five

A kind of formula of aqueous UV paint stripper, including 40 parts of main solvents of mass fraction, 30 parts of cosolvents, 8 parts of promotors and 0.6 part of surfactant, surplus are ionized water, wherein cosolvent is the solvent combination of ethylene glycol and methanol, quality proportioning are as follows: Ethylene glycol: methanol=1:3, promotor are phenol, and surfactant is neopelex.

Wherein, the time data that the combination of main solvent and each main solvent soak at room temperature to paint film are swollen are as shown in table 1, Remarks: the expression of paint film swelling time is dipped to paint film complete swelling to the strippable time in table 1.

Table 1

Main solvent	Paint film swelling time
		Benzyl alcohol	4h
Benzyl alcohol+dimethyl sulfoxide (mass ratio 1:1)	3.5h
		Benzyl alcohol+aniline (mass ratio 1:1)	3h
Dimethyl sulfoxide+aniline (mass ratio 1:1)	5h
		Benzyl alcohol+dimethyl sulfoxide+aniline (mass ratio 1:1:1)	2h

From the above data, when main solvent is the mixture of benzyl alcohol, dimethyl sulfoxide and aniline, to the molten of paint film Swollen required time is most short, so selecting these three as paint stripper main solvent.In view of whether the ratio of three's mixing will affect Paint film swelling time, is tested through repetition test, obtains being associated with for the mixed proportion of each component and paint film swelling time in main solvent Table, as shown in table 2, remarks: the expression of paint film swelling time is dipped to paint film complete swelling to the strippable time in table 2.

Table 2

By above-mentioned data it is found that working as mass ratio are as follows: benzyl alcohol: dimethyl sulfoxide: when aniline=6:2:2, the depainting time is most It is short, it is preferred forms, has thereby determined that main solvent optimum proportioning.

The preparation step for making the aqueous UV paint stripper of optimum efficiency is as follows:

S1, enough deionized waters are weighed, 0.5~1 part of mass fraction of neopelex is added, is sufficiently stirred Until being completely dissolved, basal liquid is obtained.

S2,35~45 parts of main solvents of mass fraction are added in above-mentioned basal liquid and stir evenly, obtain intermediate fluid；Main solvent For the solvent combination of benzyl alcohol, aniline and dimethyl sulfoxide, quality proportioning are as follows: dimethyl sulfoxide: aniline=6:2:2.

S3,25~35 parts of cosolvents of mass fraction are added in above-mentioned intermediate fluid, stirring to solution is in limpid regardless of stratiform State；Cosolvent is the solvent combination of ethylene glycol and methanol, quality proportioning are as follows: ethylene glycol: methanol=1:3.

S4, it is formed by step S3 and is slowly added 5~10 parts of mass fraction of phenol in solution, be sufficiently stirred until being in Transparency liquid state to get arrive finished product.

Although specifically showing and describing the present invention in conjunction with preferred embodiment, those skilled in the art should be bright It is white, it is not departing from the spirit and scope of the present invention defined by the appended claims, in the form and details to this hair It is bright to make a variety of changes, it is protection scope of the present invention.

Claims

1. a kind of aqueous UV paint stripper, it is characterised in that: by 35~45 parts of main solvents of mass fraction, 25~35 parts of cosolvents, 5~ 10 parts of promotors, 0.5~1 part of surfactant composition, surplus is deionized water；

The main solvent is the solvent combination of benzyl alcohol, aniline and dimethyl sulfoxide, quality proportioning are as follows: benzyl alcohol: dimethyl Sulfoxide: aniline=5~7:1~3:1.5~3, the cosolvent are the solvent combination of ethylene glycol and methanol, quality proportioning are as follows: second Glycol: methanol=1~2:3~4.

2. a kind of aqueous UV paint stripper as described in claim 1, it is characterised in that: the promotor is phenol.

3. a kind of aqueous UV paint stripper as described in claim 1, it is characterised in that: the surfactant is dodecyl Benzene sulfonic acid sodium salt.

4. a kind of preparation method of aqueous UV paint stripper, which comprises the steps of:

S1, enough deionized waters are weighed, 0.5~1 part of mass fraction of surfactant is added, be sufficiently stirred until completely molten Solution, obtains basal liquid；

S2,35~45 parts of main solvents of mass fraction are added in above-mentioned basal liquid and stir evenly, obtain intermediate fluid；The master is molten Agent be benzyl alcohol, aniline and dimethyl sulfoxide solvent combination, quality proportioning are as follows: benzyl alcohol: dimethyl sulfoxide: aniline=5~7: 1~3:1.5~3；

S3,25~35 parts of cosolvents of mass fraction are added in above-mentioned intermediate fluid, stirring to solution is in limpid regardless of layer state；Institute The cosolvent stated is the solvent combination of ethylene glycol and methanol, quality proportioning are as follows: ethylene glycol: methanol=1~2:3~4；

S4, it is formed by step S3 and is slowly added 5~10 parts of mass fraction of promotor in solution, be sufficiently stirred until in saturating Prescribed liquid state to get arrive finished product.

5. a kind of preparation method of aqueous UV paint stripper as claimed in claim 4, it is characterised in that: table used in step S1 Face activating agent is neopelex.

6. a kind of preparation method of aqueous UV paint stripper as claimed in claim 4, it is characterised in that: promote used in step S4 It is phenol into agent.