JPS6169001A - Patternwise dyed plastic lens - Google Patents

Abstract

PURPOSE:To obtain a patternwise dyed plastic lens having superior hardness by forming a hard film of transparent polysiloxane dyed patternwise with a disperse dye on the surface of a plastic lens substrate. CONSTITUTION:A hard film of transparent polysiloxane dyed patternwise with a disperse dye is formed on the surface of a plastic lens substrate. The hard film has a graded pattern or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Applicability] The present invention relates to a patterned plastic lens with excellent scratch resistance. More specifically, the present invention relates to a plastic lens having excellent surface hardness and having at least a surface coating layer dyed in a pattern.

[Prior art] Conventionally, plastic lenses have been manufactured by adding coloring agents directly into the base material (doping method), attaching various metal compounds to the surface by vacuum evaporation, or dyeing with disperse dyes. A method of coloring is used.

However, with this method, the pattern may become opaque or lack sharpness due to hard coating, etc.
It had problems such as poor frostbite resistance and poor durability.

As a known example close to the present invention, forming a polysiloxane-based coating on the surface of a plastic article to improve surface hardness is described in, for example, Japanese Patent Laid-Open No. 49-9275 and Japanese Patent Laid-Open No. 49-117529. Are listed. It is also known from JP-A-49-14139 to form a hard coating mainly composed of a hydrolyzate of a silicon compound on a plastic lens for eyeglasses, and to color the coating. It is also known that the surface of a plastic lens can be colored by applying a resin that can be crosslinked and cured by irradiation with active energy rays and then dyeing it (Japanese Patent Laid-Open No. 50-12
2280). Furthermore, it is also known that dyeing can be done using another membrane material.
No. 2, JP-A-48-21-1757, JP-A-51-81878@).

However, with these techniques, it has not been possible to obtain a coating film that satisfies both surface hardness and pattern dyeing. In particular, it was not known that the coating film itself could be dyed in a high-quality pattern.

Therefore, these conventional techniques have poor scratch resistance, durability, and fashionability, and it is difficult to obtain high-quality Plus Deck lenses.

[Problems to be Solved by the Invention] The present invention aims to improve the above-mentioned drawbacks of the prior art, and to obtain a lightweight, high-quality plastic lens that has excellent frostbite resistance, durability, and unprecedented fashionability. purpose. That is, the present invention provides a plastic lens that has excellent surface hardness and whose surface coating layer is pattern-dyed.

[Means for solving problems] In order to achieve the above object, the present invention comprises the following dishes.

[In a pattern-dyed lens, the lens base material is made of plastic, the surface layer of the lens base material has a transparent polysiloxane-based hard coating, and at least the hard coating is pattern-dyed with a disperse dye. A pattern-dyed plastic lens characterized by: ” In the present invention, a pattern means a line drawing in an achromatic color or a chromatic color, a color division, or a shading. Among these, a shading pattern having light and dark areas is particularly preferred because it has excellent quality and fashionability.

The plastic used for the base material in the present invention is as follows: 1. Any plastic may be used as long as it is suitable for lenses. Further, the lens may be any spectacle lens such as sunglasses, fashion glasses, corrective lenses for farsightedness, myopia, etc., golf lenses, and half-color lenses. A colorless and transparent substrate is usually preferably used as the substrate.

In the present invention, the transparent polysiloxane-based hard coating is, for example, one obtained by applying a compound represented by the following formula and curing it by heating.

(In formula [I], R represents an organic group containing a glycidoxy group, R' represents a hydrocarbon group having 1 to 5 carbon atoms or an acyl group having 1 to 4 carbon atoms, and X is O or 1. ) The compound of formula [I] above is preferably used as a hydrolyzed condensate.

Specific examples of the above formula [I] compounds include γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ-glycidoxypropyltribroboxysilane, and γ-glycidoxypropyltrimethoxysilane. Butoxysilane, γ-glycidoxypropyltriamyloxysilane, T-glycidoxyethyltrimethoxysilane, γ-glycidoxymethyltrimethoxysilane, γ-glycidoxypropyltriacetoxysilane, T-glycidoxypropyl Examples include methyldimethoxysilane, γ-glycidoxypropylmethyljethoxysilane, and γ-glycidoxypropylmethyldipropoxysilane.

These can be used alone or in combination of two or more, and hydrochloric acid or the like is added in an appropriate solvent to form a hydrolyzate (usually a partial condensate), which can be used alone or with polyvinyl butyral, polyamide, epoxy resin, (meth)acrylic acid, etc. An organic compound such as an ester copolymer, an organosilicon compound other than that represented by the formula [I] above, or an appropriate temperature of the compound are combined in the grain, and a curing catalyst, a surfactant, etc. are added to the grain as necessary. A coating agent suitable for the present invention is prepared. Particularly preferred among these are hydrolysates of organosilicon compounds, compounds having epoxy groups as organic compounds, and those containing aluminum compounds as curing catalysts.

The above paint is transparent and smooth.

The above-described coating material is applied to the surface of the lens base material by dipping, spinning, spraying, or the like, and then hardened by heating and curing. It is also possible to perform appropriate cleaning and pretreatment prior to coating to improve adhesion and appearance.

Although heating curing conditions vary depending on the amount of catalyst added, 80 to 200'C is usually suitable.

For patterning, the polysiloxane coating described above is pattern-dyed with a disperse dye. This allows the polysiloxane coating to be pattern-dyed with the disperse dye. Of course, the base material may also be dyed at the same time as the coating. However, the technical idea of the present invention is to dye a highly hard coating in a pattern, thereby producing clear and fashionable eyeglass lenses. Specifically, the methods commonly used in the textile industry (seismic printing, roll printing, etc.), as well as the dyeing method that has been used in the textile industry since ancient times, can also be used. It can be obtained by immersing it in a solution and continuously changing the immersion depth.In addition, by drawing a pattern with an aqueous dye solution,
Dry heat treatment at 250'C for 1 minute to 5 hours,
Dyeing aid that remained on the surface by moist heat treatment in pressurized steam at 80'C for 10 minutes to 2 hours, then washing with water and hot water,
This is done by removing excess dye. Alternatively, a method may be adopted in which a pattern is drawn on paper or the like in advance and the pattern is thermally transferred. The color by dyeing can be arbitrary.

In the present invention, it is preferable that the hard coating has such a hardness that it will not be scratched even if it is rubbed back and forth while applying a load with steel wool. At this level, there is no practical need for a special eyeglass cleaner, and cleaning with a regular cloth such as a handkerchief or towel will not cause any damage. Therefore, it is possible to improve the scratch resistance, which was the biggest drawback of conventional plastic lenses. In this sense, it is particularly preferable that the hard coating has such a hardness that it will not be scratched even if a load of 500Q is applied with steel wool #000 and the coating is rubbed back and forth 10 times.

Another feature of the laminate according to the present invention is that the patterned part does not bulge or protrude from the underlying part.
The point is that it is integrated with the hard polysiloxane coating on the surface of the base. Therefore, in the lens of the present invention, since the underlying hard polysiloxane coating is patterned from the surface to the inside, the pattern itself has good durability. Since the hard coating is transparent, the pattern has depth and sharpness that cannot be obtained with conventional coatings.

[Example] Example 1 54 parts by weight of 0.01N hydrochloric acid aqueous solution was added to 236 parts by weight of γ-glycidoxypropyltrimethoxysilane,
The mixture was stirred on a magnetic stirrer for 1 hour to obtain a hydrolyzate. 50 parts by weight of this hydrolyzate, glycerol polyglycidyl ether (Denacol manufactured by Nagase Sangyo Co., Ltd.)
EX314>25 parts by weight, m-xylene 50 parts by weight, ethylene chlorohydrin 50 parts by weight, acetylacetone aluminum salt 5 parts by weight, silicone surfactant 0.
7 parts by weight was added, stirred until a homogeneous solution was obtained, aged day and night, and filtered to prepare a coating agent. The viscosity of the crystal (20'C) was 12 centipoise, and the solid content concentration (calculated from the remaining amount after heating for 85'C and 130'C for 1 hour) was 51%.

This coating agent was applied to a colorless and transparent polymethyl methacrylate lens substrate that had been pretreated with a coupling agent by the dipping method (pulling speed 10 cm/min), and cured for 1 hour in a hot air circulation drying chamber at 90'C. did.

The lens substrate coated with this polysiloxane film was placed in a dye bath containing the disperse dye shown below at a 95° angle.
The dyeing process was carried out for 5 minutes by manually changing the immersion depth at C.

The obtained dyed lens had a bluish-purple blurred pattern in which the density continuously changed from dark to light. This lens was highly fashionable and had elegant color patterns. Furthermore, the surface hardness was good, with almost no scratches on the surface even when abraded with steel wool.

Dye bath composition 1anix Red AC-E 0.
42 g(' Dianix Blue BG
-FF 1, 60 CI Gi (manufactured by Mitsubishi Chemical Industries, Ltd.) T D Yet low D-GLF conc,
0, 38 Q (Daito Chemical Industry Co., Ltd.) Dispersant (Rapisol B-80> 6g (Nippon Oil & Fats Co., Ltd.) Water 1o○○
Q Example 2 In the same manner as in Example 1, a half-color lens was prepared by leaving the lower 1/4 of the lens transparent and gradually dyeing it in a dark color toward the top. As with Example 1, the lens thus made has a high quality and is rich in a sense of fashion that was not seen before.

[Effects of the Invention] The plastic lens of the present invention maintains scratch resistance, solvent resistance, hot water resistance, etc. practically equivalent to ordinary ceramic articles, has a clear hue, and is resistant to sunlight, friction, and sublimation. It has an extremely durable pattern. In particular, the hard surface layer is dyed in a pattern, making it possible to produce vivid and deep colors. In addition, it has unprecedented fashionability □1, and can be made into a lightweight, high-quality plastic lens.

Moreover, since the dyeing process is not very difficult, dyeing can be done in-store according to the customer's request.

Claims (4)

[Claims] (1) In a pattern-dyed lens, the lens base material is made of plastic, the surface layer of the lens base material has a transparent polysiloxane-based hard coating, and at least the hard coating is pattern-dyed with a disperse dye. A patterned dyed plastic lens. (2) A pattern-dyed plastic lens according to claim (1), wherein the pattern is a blurred pattern having light and dark areas. (3) The pattern-dyed plastic lens according to claim (1), wherein the hard coating has a hardness that does not cause scratches even when the hard coating is rubbed back and forth while applying a load with steel wool. . (4) Claim No. (1) characterized in that the hard coating is a hardened compound of the following general formula [I].
) Pattern-dyed plastic lenses. ▲There are mathematical formulas, chemical formulas, tables, etc.▼ [I] (In the formula [I], R represents an organic group containing a glycidoxy group, and R' represents a hydrocarbon group having 1 to 5 carbon atoms or a hydrocarbon group having 1 to 4 carbon atoms.
represents an acyl group, and X is 0 or 1. )