JP3355160B2 - Cleaning composition for plastic lenses - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a cleaning composition for plastic lenses. More specifically, extra plastic lens resin attached to the surface of the plastic lens,
The present invention relates to a cleaning composition for a plastic lens and a method for cleaning a plastic lens, which is excellent in cleaning properties of unpolymerized substances, adhesives, resin powder such as grinding powder for plastic lenses, and stains such as fingerprints and dust.

[0002]

2. Description of the Related Art Various stains are adhered to the surface of a plastic lens after it is released from a molding die and before the surface is coated. For example, the plastic lens raw material spilled during the injection of the monomer becomes an oligomer or a polymer on the outside of the molding die, and the oligomer or polymer resin stain adhered to the surface of the plastic lens at the time of releasing the mold, and the remaining resin residue on the surface of the plastic lens. Polymers, transfer components from gaskets, transfer adhesives from tapes, resin powder attached during outer peripheral grinding and chamfering, fingerprints, and other dust in the atmosphere.

[0003] Of these, plastic lens raw material or resin-derived dirt has a high molecular weight, has strong adhesiveness, and is firmly attached to the surface of the plastic lens.
In addition, since the object to be cleaned and the dirt component are the same, it is difficult to remove them. On the other hand, for fingerprints, the polarity is small, and unlike resin stains, dissolution cleaning is important. It is rather important to prevent re-adhesion of dust. As described above, cleaning is difficult, and it is extremely difficult to obtain a highly clean surface required for coating or the like for stains having different characteristics.

[0004] As a method for cleaning the plastic lens to which these stains adhere in each step, for example, Japanese Patent Laid-Open No.
Japanese Patent Publication No. 256564/77 discloses a cleaning method and apparatus by spraying a solid piece and a surfactant-containing cleaning liquid onto the surface of an object to be cleaned. However, in the case of this cleaning method, the cleaning ability is insufficient for high-molecular-weight stains such as resins and adhesives and fingerprints.

Japanese Patent Application Laid-Open No. 5-269448 discloses that
Disperse dirt components that are freely mixed with the cleaning solution in the cleaning solution,
There is disclosed a cleaning method of performing ultrasonic cleaning, cleaning by spraying a cleaning liquid from a nozzle in a solution atmosphere or a gas atmosphere, or stirring cleaning in which the cleaning liquid is stirred. However, in the case of this washing method, resin-derived, in particular,
Insufficient cleaning capacity for high molecular weight stains and dust. Furthermore, Japanese Patent Application Laid-Open No. 5-269448 discloses a detergent composition used in a manufacturing process of optical parts such as glass and glass lenses, but a detergent composition intended to be used for cleaning plastic lenses. Is not disclosed.

[0006]

SUMMARY OF THE INVENTION According to the present invention, it is possible to obtain a highly clean surface required for coating or the like against dirt having different characteristics because it adheres to the surface of a plastic lens and is difficult to clean. It is an object of the present invention to provide a plastic lens cleaning composition (hereinafter, referred to as a cleaning agent) and a plastic lens cleaning method (hereinafter, referred to as a cleaning method).

[0007]

That is, the gist of the present invention is as follows: [1] General formula (I): R ¹ -O- (R ² -O) m- (R ³ -O) n-R ⁴ ( I) (wherein, R ¹ is a hydrogen atom or a hydrocarbon group having 1 to 8 carbon atoms, R ² and R ³ are each an alkylene group having 2 to 4 carbon atoms, R ⁴ is a hydrogen atom, and 1 to 4 carbon atoms. An alkyl group or an acyl group having 1 to 4 carbon atoms, m is an integer of 1 to 7, n is 0
Shows an integer of ~ 7. An alkylene oxide compound A represented by the general formula (II): R ¹ —COO— (R ² —O) m— (R ³ —O) n—R ⁴ (II) (wherein R ¹ , R ² , R ³ and R ⁴ and m and n are the same as described above), and a general formula (III):

[0008]

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Wherein R ¹ , R ² , R ³ and R ⁴ and m and n are the same as above, and R ⁵ is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or an acyl group having 1 to 4 carbon atoms. , P
Represents an integer of 0 to 5, and q represents an integer of 0 to 5. A) a detergent containing 5% by weight or more of at least one alkylene oxide compound selected from the group consisting of the alkylene oxide compounds C represented by the formula [2], and [2] a plastic lens to be cleaned with the detergent according to the above [1]. A cleaning method.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An alkylene oxide compound which is a component contained in the cleaning agent of the present invention, which is used for cleaning a plastic lens, has a general formula (I): R ¹ -O- (R ² -O) ^{m- (R 3 -O) n-} R 4 (I) ( wherein, R ¹ represents a hydrogen atom or a hydrocarbon group, R ² and R ³ is an alkylene group having 2 to 4 carbon atoms having 1 to 8 carbon atoms , R ⁴ is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or an acyl group having 1 to 4 carbon atoms, m is an integer of 1 to 7, n is 0.
Shows an integer of ~ 7. An alkylene oxide compound A represented by the general formula (II): R ¹ —COO— (R ² —O) m— (R ³ —O) n—R ⁴ (II) (wherein R ¹ , R ² , R ³ and R ⁴ and m and n are the same as described above), and a general formula (III):

[0011]

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Wherein R ¹ , R ² , R ³ and R ⁴ and m and n are the same as above, and R ⁵ is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or an acyl group having 1 to 4 carbon atoms. , P
Represents an integer of 0 to 5, and q represents an integer of 0 to 5. ) Is at least one selected from the group consisting of the alkylene oxide compounds C.

Alkyes represented by the general formulas (I) to (III)
In the lenoxide compound, R¹ Is a hydrogen atom or
Although it is a hydrocarbon group having 1 to 8 carbon atoms,
From the viewpoint of solubility in the
It is preferably a hydrogen group. R¹Is hydrogen atom or charcoal
When it is not a hydrocarbon group having a prime number of 1 to 8, the cleaning property is reduced.
Sometimes. Examples of the hydrocarbon group having 1 to 8 carbon atoms include
For example, methyl, ethyl, propyl, butyl, pen
Straight chain such as tyl, hexyl, heptyl, octyl, etc.
Saturated hydrocarbon group; isopropyl group, isobutyl group, t-
Branched saturated hydrocarbon groups such as butyl group; vinyl group, allyl
Group, propenyl group, butenyl group, pentenyl group, hexene
Straight-chain unsaturated carbons such as nyl, heptenyl and octenyl groups
Hydrogen group; branched unsaturated hydrocarbon such as isopropenyl group
Group; cyclopropyl group, cyclobutyl group, cyclopentic group
Group, cyclohexyl group, cycloheptyl group, cyclo
Cyclic saturated hydrocarbon group such as octyl group; cyclopropenyl
Group, cyclobutenyl group, cyclopentenyl group,
Xenyl, cycloheptenyl, cyclooctenyl
Cyclic unsaturated hydrocarbon groups such as phenyl group, benzyl group,
And aromatic hydrocarbon groups such as phenethyl group.

R ² and R ³ each have 2 to 4 carbon atoms
Is an alkylene group. When the number of carbon atoms is 1, the production of the alkylene oxide compound becomes extremely difficult. When the number of carbon atoms exceeds 4, not only the rinsability may be reduced, but also the alkylene oxide compound may be difficult to produce. It is also very expensive and difficult to obtain. Examples of the alkylene group having 2 to 4 carbon atoms for R ² and R ³ include an ethylene group, a propylene group, and a butylene group.

R ⁴ and R ^{5 each} represent a hydrogen atom, a carbon number of 1 to
It represents an alkyl group having 4 carbon atoms or an acyl group having 1 to 4 carbon atoms. In the case of any of the alkyl groups and acyl groups, when the number of carbon atoms exceeds 4, rinsing properties may be reduced. Examples of the alkyl group having 1 to 4 carbon atoms include a methyl group, an ethyl group, a propyl group, and a butyl group.
Examples of the acyl groups (1) to (4) include a formyl group, an acetyl group, a propionyl group and a butyryl group.

In the alkylene oxide compounds represented by the general formulas (I) to (III), R ² and R ³
May be the same or different.

M is an integer of 1 to 7, n is an integer of 0 to 7, p is an integer of 0 to 5, and q is an integer of 0 to 5. Here, n, p and q may be 0. Therefore,
m + n is an integer of 1 to 14, and p + q is an integer of 0 to 10. From the viewpoint of solubility in water and compatibility with other components, m + n is preferably an integer of 2 to 10,
More preferably, it is an integer of 2 to 4. From the same viewpoint, p + q is preferably an integer of 1 to 4.

The alkylene oxide compounds represented by the general formulas (I) to (III) can usually be used alone or in combination of two or more.

Representative examples of the alkylene oxide compound A represented by the general formula (I) include, for example, methanol,
Alcohols having a linear or branched alkyl group such as ethanol, propanol, butanol, isobutanol, hexanol and octanol; phenols such as phenol and cresol; alicyclic alcohols such as cyclohexanol; A catalyst obtained by adding and reacting alkylene (e.g., ethylene, propylene, butylene, etc.) oxides having 2 to 4 carbon atoms in a liquid or gaseous state, alone or in combination, with heating under the above catalyst. And compounds in which the terminal hydroxyl group of these alkylene oxide adducts is methylated, ethylated or butylated with alkyl chloride or the like, or esterified with acetic acid, propionic acid or the like.

Specific examples of the alkylene oxide compound A represented by the general formula (I) are described in JP-A-10-228118, page 8, column 14, line 44 to page 9, column 16, line 19. Compounds. In this specification, (POE) represents a polyoxyethylene group, and (POP) represents a polyoxypropylene group. For example, (P
OE) ₁ to ₅ means ₁ to ₅ mol addition of polyoxyethylene groups.

Among them, the cleaning performance and the availability
In terms of (POE)₁~_FiveMonomethyl ether, (PO
E)₁~_FiveMonoethyl ether, (POE)₁~_Fivemono
Propyl ether, (POE)₁~_FiveMonobutyl ether
Le, (POE)₁~_TwoMonoisobutyl ether, (PO
E)₁~_TwoMonoallyl ether, (POE)₁~_Twomono
Hexyl ether, (POE)₁~_TwoMono 2-ethyl
Xyl ether, (POE)_Four~_FiveMonophenyl ether
Le, (POE)_Four~_FiveMonobenzyl ether; (PO
E)₁~_FourDimethyl ether, (POE)₁~_TwoDieci
Ruether, (POE)₁~_TwoDipropyl ether,
(POE)₁~_TwoDibutyl ether, (POE)_TwoEtch
Methyl ether, (POE)_TwoButyl methyl ether
Le, (POE) _Two2-ethylhexyl methyl ether;
(POP)₁~_ThreeMonomethyl ether, (POP)₁~
_ThreeMonoethyl ether, (POP)₁~_ThreeMonopropyl
Ether, (POP)₁~_ThreeMonobutyl ether; (P
OP)₁~_ThreeDimethyl ether, (POP)₁~_TwoJie
Chill ether, (POP)₁~_TwoDipropyl ether,
(POP)₁~_TwoDibutyl ether, (POP)_TwoIso
Propyl methyl ether, (POP)_TwoDiisopropyl
Ethyl ether; acetates are preferred.

When the alkylene oxide compound A is used alone or in combination with only a hydrophobic component such as a hydrocarbon, the alkylene oxide containing a polyoxyethylene group in which R ² and R ³ are an alkylene group having 2 carbon atoms. Compounds are preferred from the viewpoints of detergency and rinsing properties.

When used in combination with an alkaline component such as an amine compound, R ⁴ is preferably not an acyl group.

These alkylene oxide compounds A
Can be used alone or in combination of two or more.

Representative examples of the alkylene oxide compound B represented by the general formula (II) include, for example, formic acid, acetic acid,
Saturated monocarboxylic acids having a linear or branched alkyl group such as propionic acid; unsaturated carboxylic acids such as acrylic acid and methacrylic acid; aromatic carboxylic acids such as benzoic acid; alicyclic carboxylic acids such as cyclohexanecarboxylic acid Compounds synthesized by the same method as in the general formula (I) using an acid or the like as a raw material are exemplified.

Specific examples of the alkylene oxide compound B represented by the general formula (II) are described in JP-A-10-228118, page 9, column 16, line 34 to page 9, column 16, line 40. Is mentioned.

Among them, from the viewpoints of uniformity and availability of the detergent when mixed with other components, (POE) _1-
5 monomethyl ester, (POE) ₁ ~ ₅ monoethyl ester, methacrylic acid (POE) ₁ ~ ₅ adducts, benzoic acid (POE) ₁ ~ ₅ adduct; (POE) ₁ ~ ₄ dimethyl ester, (POE) _1-4 diethyl ester; are preferred.

When the alkylene oxide compound B is used alone or in combination with only a hydrophobic component such as a hydrocarbon, a compound containing a polyoxyethylene group in which R ² and R ³ are an alkylene group having 2 carbon atoms. This is preferable from the viewpoints of cleaning properties and rinsing properties.

These alkylene oxide compounds B
Can be used alone or in combination of two or more.

Representative examples of the alkylene oxide compound C represented by the general formula (III) include, for example, ethylamine, diethylamine, hexylamine, butylamine,
Using amines having a straight-chain, branched-chain, aromatic or alicyclic hydrocarbon group such as octylamine, benzylamine and cyclohexylamine as a raw material, the general formula (I)
And the like.

Specific examples of the alkylene oxide compound C represented by the general formula (III) are described in JP-A-10-228118.
No. 10, page 17, column 4, line 4 to page 10, column 17, line 9, compounds.

Among them, from the viewpoint of uniformity of the detergent when mixed with other components and easy availability, (POE) _1-
5 monoethylamine, (POE) ₁ ~ ₅ diethylamine, (POE) ₁ ~ ₅ hexylamine, (POE) ₁ ~
₅ butylamine, (POE) ₁ ~ ₅ octylamine,
(POE) ₁ ~ ₅ benzylamine, (POE) ₁ ~ ₅ cyclohexylamine; are preferred.

When the alkylene oxide compound C is used alone or in combination with only a hydrophobic component such as a hydrocarbon, the alkylene oxide containing a polyoxyethylene group in which R ² and R ³ are an alkylene group having 2 carbon atoms. Compounds are preferred from the viewpoints of detergency and rinsing properties.

When used in combination with an alkaline component such as an amine compound, R ⁴ and R ⁵ are preferably not acyl groups.

These alkylene oxide compounds C
Can be used alone or in combination of two or more.

The alkylene oxide compounds A to C
If, when using a combination of an alkaline component such as amine compound, examples of the alkylene oxide compound, alkylene oxide compounds A, C are preferred, R ⁴ is not an acyl group alkylene oxide compound A, is R ⁴ and R ⁵ Alkylene oxide compounds C that are not acyl groups are more preferred. In addition, from the viewpoint of detergency,
Alkylene oxide compound A represented by general formula (I)
Can be particularly preferably used in the present invention.

Furthermore, in the alkylene oxide compounds A, alkylene oxide compounds wherein R ¹ is a hydrogen atom or a hydrocarbon group having 1 to 3 carbon atoms and (A1), R ¹
In combination with the alkylene oxide compound (A2), which is a hydrocarbon group having 4 to 8 carbon atoms, a better effect can be obtained from the viewpoint of detergency and rinsing properties. When these are combined, the mixing ratio of A1 and A2 (A1 / A2:
Weight ratio) is preferably 5/95 to 95/5, more preferably 10/90 to 90/10.

These alkylene oxide compounds A to
The content of C in the cleaning agent (when two or more types are used in combination means the total amount) is not particularly limited as long as it is 5% by weight or more. Can be selected as appropriate. When used for general purposes, from the viewpoint of detergency and rinsing properties, the detergent of the present invention preferably contains 5 to 95% by weight, more preferably 10 to 80% by weight.
% By weight, particularly preferably 20 to 70% by weight.
If the content is less than 5% by weight, the washing property of the resin stains which are firmly fixed is inferior in cleaning properties, which is not preferable. Moreover, it is preferable from a viewpoint of rinsing property that it is less than 95 weight%.

In the present invention, the compounds represented by the general formulas (I) to (II)
By further adding a hydrocarbon having 10 to 18 carbon atoms to the detergent containing the alkylene oxide compound of I), it is possible to improve the detergency of a high-molecular-weight and strongly adhered resin stain. Such hydrocarbons may be any as long as they have 10 to 18 carbon atoms. Unsaturated hydrocarbons; alkylbenzenes such as nonylbenzene and dodecylbenzene; naphthalene compounds such as methylnaphthalene and dimethylnaphthalene; and cyclo compounds such as cyclodecane and cyclododecene.
Among these, straight-chain or branched-chain saturated or unsaturated hydrocarbons having 12 to 18 carbon atoms are preferred.
In consideration of handling properties and the like, olefinic hydrocarbons are more preferable among the unsaturated hydrocarbons. The content of these hydrocarbons in the detergent is not particularly limited, but is preferably 5 to 95% by weight, more preferably 1 to 95% by weight in the detergent of the present invention in order to exhibit the effect of the combined use.
The content is 0 to 80% by weight, particularly preferably 20 to 70% by weight. From the viewpoint of the effect of the combined use, 5% by weight or more is preferable,
It is preferable that the content be 95% by weight or less from the viewpoint of rinsing properties.

In the present invention, general formulas (I) to (II)
By further adding a nonionic surfactant having an average HLB of 4 to 18 to the detergent containing the alkylene oxide compound of I), it is easy to clean and rinse fine dirt such as resin powder after grinding, and water. The compatibility when other components are blended can be further improved.

Specific examples of the nonionic surfactant include compounds described in JP-A-9-223679, page 6, column 9, line 14 to page 6, column 9, line 35.

Among the above compounds, detergency and rinsing properties,
(POE) from the standpoint of handling and availability_Five
~₉C12-14 carbon synthetic alcohol ether, (PO
E) _Four~_TenLauryl ether, (POE)_Five~₈Cetyl
Ether, (POE)_Ten~_FifteenStearyl ether, (P
OE)_Five~_FifteenOleyl ether, (POE)₆~_TenOk
Tyl phenyl ether, (POE)_Five~₁₃Nonylpheni
Sorbitan esters; sorbitan esters
Preferred are alkylene oxide adducts of phenols.

When these nonionic surfactants are used in combination with an alkaline component such as an amine compound, a non-ester surfactant is preferred.

The content of these nonionic surfactants in the cleaning solution is not particularly limited, but is preferably 0.5 to 35 in the cleaning agent of the present invention in order to exhibit the effect of the combined use. % By weight, more preferably 3 to 25% by weight,
Particularly preferably, the content is 5 to 15% by weight. It is preferably 0.5% by weight or more from the viewpoint of the effect of the combined use, and is preferably within 35% by weight from the viewpoint that the viscosity of the detergent is moderate, the handling property is excellent, and the rinsing property is also good.

In the present invention, the compounds represented by the general formulas (I) to (II)
By adding an amine compound having 1 to 5 nitrogen atoms and a molecular weight in the range of 50 to 300 to the cleaning agent containing the alkylene oxide compound of I), a pressure-sensitive adhesive or low-molecular resin stain derived from a protective tape is obtained. It is possible to further improve the cleaning property and the rinsing property of polar dirt such as.

The amine compound is more preferably an amine compound having 1 or 2 nitrogen atoms and a molecular weight in the range of 100 to 250 from the viewpoint of the odor and rinsing properties of the detergent.

Specific examples of the amine compounds are described in
No. 157787, page 4, column 5, line 34 to page 5, column 7, line 46.

Of the above compounds, monoethanolamine, diethanolamine,
Alkanolamines such as triethanolamine and methylmonoethanolamine; morpholines such as morpholine and N-methylmorpholine; pyridines and piperidines;
Diamines such as N-cyclohexyl-1,3-diaminopropane, triamines, and tetraamines; linear or branched alkyl monoamines such as cyclohexylamine, butylamine, hexylamine, and octylamine are preferred.

Further, alkanolamines, morpholines, diamines, and straight-chain alkyl monoamines are preferred from the viewpoints of compatibility and availability when other components such as hydrocarbons and water are blended.

The content of these amine compounds in the detergent is not particularly limited, but is preferably 0.1 to 0.1 in the detergent of the present invention in order to exert the combined effect.
%, More preferably 1 to 50% by weight, particularly preferably 5 to 20% by weight. From the viewpoint of the effect of the combined use, the content is preferably 0.1% by weight or more, and considering the corrosion of the plastic lens surface by the amine compound, the content is preferably within 70% by weight.

When cleaning the plastic lens, the cleaning agent of the present invention may be used in a non-aqueous system, or may be used after being diluted to an appropriate concentration with water. From the viewpoint of cleaning performance, it is preferable to use a cleaning agent containing water for cleaning the plastic lens.

When used after dilution with water, the amount of water to be added is not particularly limited, but from the viewpoint of safety and detergency, preferably 5 parts by weight per 100 parts by weight of the detergent.
To 1000 parts by weight, more preferably 10 to 500 parts by weight.
Parts by weight. Water used for dilution is not particularly limited as long as it does not impair the effect of the cleaning agent of the present invention, and includes ultrapure water, pure water, ion-exchanged water, distilled water, ordinary tap water, and the like. Used.

In the detergent of the present invention, as far as the effects of the present invention are not impaired, if necessary, a sequestering agent, a preservative, a rust inhibitor, and a sequestering agent generally used in general detergents may be used.
Additives such as an antifoaming agent and an antioxidant can be appropriately used in combination.

The cleaning agents of the present invention have the general formulas (I) to (II)
I) the alkylene oxide compound alone or having 1 carbon atom
0 to 18 hydrocarbons, nonionic surfactant having an average HLB of 4 to 18 and 1 to 5 nitrogen atoms and a molecular weight of 50 to 3
It can be obtained by mixing an amine compound in the range of 00, water, an optional additive and the like by a conventional method. The detergent of the present invention can contain any of the other components described herein as long as it contains 5% by weight or more of the alkylene oxide compounds of the general formulas (I) to (III). From the viewpoint of cleaning performance, the cleaning agent is represented by the general formula (I):
In addition to the alkylene oxide compound (III), the composition preferably further contains the nonionic surfactant and the amine compound, and more preferably further contains the hydrocarbon. However, when other components are contained in the detergent in addition to the alkylene oxide compounds of the general formulas (I) to (III), the content of the alkylene oxide compound of the general formulas (I) to (III) is reduced to 5 to 90% by weight. Is preferable from the viewpoint of the combined use with other components.

The cleaning method of the present invention includes a cleaning step of cleaning a stained plastic lens using the cleaning agent of the present invention, and a rinsing containing 0.1% by weight or more of the cleaning agent of the present invention. A rinsing step of rinsing with a liquid. In the cleaning method of the present invention, the cleaning may be completed by the cleaning step alone, or the cleaning step and the rinsing step may be combined. From the viewpoint of cleaning performance, it is preferable to clean the plastic lens by combining the above two steps.

In the cleaning step, the cleaning agent of the present invention or an aqueous solution obtained by diluting the cleaning agent with water can be used. The concentration of the detergent in the aqueous solution is determined by the general formulas (I) to (II).
There is no particular limitation as long as the alkylene oxide compound of I) is contained in an amount of 5% by weight or more, and can be appropriately adjusted according to the degree of contamination of the plastic lens, the components of the contamination, and the like.

The physical force in the washing step is not particularly limited, and a known physical force that is generally used can be used. For example, various physical forces such as an immersion method, an ultrasonic cleaning method, an immersion rocking method, a spray method, and a hand wiping method can be used alone or in combination. Further, the cleaning conditions such as the temperature of the cleaning agent and the cleaning time are not particularly limited, and can be appropriately adjusted according to the degree of contamination of the plastic lens, the components of the contamination, and the like. For example, the temperature of the cleaning agent is 20 ° C.
-80 ° C is preferable, and 35 ° C-60 ° C is more preferable from the viewpoints of detergency and reduction of water evaporation. The washing time is generally selected from about 30 seconds to 20 minutes.

The rinsing step is a step of rinsing the detergent adhered to the plastic lens, remaining or reattached stains, and the like. The rinsing liquid according to the cleaning method of the present invention is an aqueous solution obtained by mixing the cleaning agent of the present invention and water, and the cleaning agent is preferably 0.1% by weight or more, more preferably 0.5% by weight or more. , Particularly preferably at least 3% by weight. When the amount is less than 0.1% by weight, the removability of the adhered cleaning agent and the residual and reattached stains is poor. Depending on the condition of the finishing rinse after this step, the cleaning agent is preferably 50% by weight or less, more preferably 20% by weight or less, particularly preferably 10% by weight as an active ingredient other than water in the rinsing liquid. The following are used.

The cleaning agent contained in the rinsing solution may be the same as the cleaning agent used in the cleaning step performed before the rinsing step, or may be the other cleaning agent of the present invention. Good.

The physical force in the rinsing step is not particularly limited, and a known physical force that is generally used can be used.
For example, various physical forces such as an immersion method, an ultrasonic cleaning method, an immersion rocking method, a spray method, and a hand wiping method can be used alone or in combination. Also, the rinsing conditions such as the temperature of the rinsing liquid and the rinsing time are not particularly limited, and can be appropriately adjusted according to the degree of the cleaning agent adhered to the plastic lens and the degree of residual and re-adhered stains. For example, the temperature of the rinsing liquid is preferably 5 ° C to 95 ° C,
20 ° C to 80 ° C from the viewpoint of reducing the rinsing properties and the amount of water evaporation.
C is more preferred. When the cleaning agent has a cloud point in this temperature range, the rinsing temperature is preferably equal to or lower than the cloud point. The rinsing time is generally 30 seconds to 2 seconds.
It is selected from about 0 minutes.

The cleaning method of the present invention may further include a finish rinsing step, in which the plastic lens cleaned and rinsed in the above step is further washed with water at 5 to 95 ° C. or an organic solvent such as isopropyl alcohol at room temperature. The finish rinsing may be performed using a finish rinsing liquid such as the above.

The cleaning agent and the cleaning method of the present invention include a resin obtained by radical polymerization of diethylene glycol bisallyl carbonate (ADC), a methacrylic resin, a fumaric acid ester / allyl monomer copolymer resin, a triazine ring acrylic resin, At least one resin selected from the group consisting of polycarbonate resins, bromine-containing resins, urethane resins, sulfur-containing urethane resins and thioether / ester resins, or unpolymerized products of the resins, adhesives and plastic lenses. It is preferably used for cleaning dirt attached to plastic lenses such as resin powder such as grinding powder, fingerprints and dust.

[0063]

EXAMPLES Compositions shown in Tables 1 to 3 (composition ratio units are% by weight)
Are prepared by mixing the components shown in Tables 1 to 3 by a conventional method, and a rinse solution containing the detergent at a predetermined concentration (% by weight) shown in Table 4 is prepared. Using these cleaning agents and the rinsing liquid, the cleaning performance of two types of plastic lenses was evaluated.

[Plastic Lens] (1) In a molding glass mold, CR-39 manufactured by PPG was used.
After the monomer was polymerized and released from the mold, the outer periphery was ground and the edge portion was chamfered to produce a plastic lens. Adhesion stains before hard coating were extra plastic lens resin pieces, unpolymerized products thereof, and grinding powder thereof. (2) MR-6 monomer manufactured by Mitsui Chemicals, Inc. was polymerized to obtain a plastic lens in the same manner, and the back surface was polished for the purpose of adjusting the thickness and the like. Adhesion stains before hard coating were plastic lens resin powder, fingerprints, and dust.

[Cleaning test] The above plastic lens was put into various cleaning agents, immersed in the cleaning solution, and subjected to ultrasonic waves (39 kHz, 200 W, 8.3 L, manufactured by Sharp Corporation) at 50 ° C. for 1 minute.
(Ultrasonic cleaning device UT-204) After cleaning, the cleaning agent was immersed in a rinsing solution containing a predetermined concentration, and rinsed under the same conditions as in the cleaning. Further, a final rinse was carried out for 2 minutes in flowing ion-exchanged water at 25 ° C. afterwards,
After air blowing for 1 minute, it was air-dried indoors. Thereafter, the state of removal of each stain was visually observed, and the area ratio (%) of the stain removed from the original stained area was measured.

This operation was repeated three times, and the average value of the area ratio (%) was taken as the cleaning performance (%). In this case, the higher the numerical value of the cleaning performance, the more the adhered dirt is removed, that is, the higher the cleaning performance. Table 4 shows the results.

[0067]

[Table 1]

[0068]

[Table 2]

[0069]

[Table 3]

[0070]

[Table 4]

From the above results, it was found that the detergents 1-2 containing the alkylene oxide compound according to the present invention at a predetermined concentration.
It can be seen that excellent cleaning performance against resin fragments, fingerprints, dust and the like can be obtained by using 0 for cleaning plastic lenses. In addition, the cleaning performance is further improved by including each of the hydrocarbons, nonionic surfactants, and amine compounds which can be used together in the cleaning agent of the present invention shown in Tables 1 to 3 in the cleaning agent. In particular, it is preferable to use a cleaning agent further containing a nonionic surfactant and an amine compound, and it is more preferable to use a cleaning agent further containing a hydrocarbon. Further, it is preferable that water is contained in the cleaning agent.

On the other hand, when the detergents 21 to 28 containing no alkylene oxide compound according to the present invention and the detergents 29 and 30 containing less than 5% by weight of the compound are used, the detergents 1 to 28 are used. It can be seen that the cleaning performance is considerably inferior to the case using No. 20.

In the cleaning examples 31 and 32, the plastic lens is cleaned using the cleaning agents 19 and 20, and then the rinsing is performed using a rinsing liquid containing less than 0.1% by weight of the cleaning agent. Performed, but cleaning examples 19 and 2
Since the cleaning performance is slightly inferior to the case of 0, performing the rinsing step using a rinsing liquid containing 0.1% by weight or more of the cleaning agent following the cleaning step improves the cleaning performance. It turns out to be preferable.

[0074]

According to the cleaning agent of the present invention and the method for cleaning a plastic lens using the cleaning agent, the cleaning agent adheres to the surface of the plastic lens, is difficult to clean, and is resistant to stains such as resin pieces, fingerprints, dust and the like having different characteristics. Thus, high cleanability can be obtained, and a highly clean plastic lens surface required at the time of coating or the like can be obtained.

Claims (6)

(57) [Claims] 1. A compound of the general formula (I): R ¹ —O— (R ² —O) m— (R ³ —O) n—R ⁴ (I) (wherein R ¹ is a hydrogen atom or a carbon atom To 8 hydrocarbon groups, R ² and R ³ are each an alkylene group having 2 to 4 carbon atoms, R ⁴ is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or an acyl group having 1 to 4 carbon atoms, and m is 1 An integer from 7 to 0, n is 0
Shows an integer of ~ 7. An alkylene oxide compound A represented by the general formula (II): R ¹ —COO— (R ² —O) m— (R ³ —O) n—R ⁴ (II) (wherein R ¹ , R ² , R ³ and R ⁴ and m and n are the same as defined above), and a general formula (III): (Wherein R ¹ , R ² , R ³ and R ⁴ and m and n are the same as above, R ⁵ is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or an acyl group having 1 to 4 carbon atoms, p is An integer of 0 to 5, and q represents an integer of 0 to 5.) Cleaning for a plastic lens containing at least 5% by weight or more of at least one alkylene oxide compound selected from the group consisting of the alkylene oxide compounds C represented by Composition. 2. The cleaning composition for a plastic lens according to claim 1, further comprising a hydrocarbon having 10 to 18 carbon atoms. 3. The plastic lens cleaning composition according to claim 1, further comprising a nonionic surfactant having an average HLB of 4 to 18. 4. The plastic lens cleaning composition according to claim 1, further comprising an amine compound having 1 to 5 nitrogen atoms and a molecular weight in the range of 50 to 300. 5. A method for cleaning a plastic lens, wherein the cleaning method is performed with the cleaning composition for a plastic lens according to claim 1. 6. Rinsing is further performed using a rinsing solution containing 0.1% by weight or more of the cleaning composition for plastic lenses according to claim 1.
The method for cleaning a plastic lens described in the above.