KR100946945B1 - A lampshade to be sprayed silicone layer - Google Patents

Abstract

The present invention relates to a method of manufacturing a lampshade coated with a light-diffusing silicon layer, and more specifically, a) applying a mixture of a silicone rubber, a light diffusing agent, a primer, and a viscosity modifier in a spray method; b) naturally drying the applied lampshade; C) heating and vulcanizing the naturally dried lampshade; It relates to a manufacturing method of a lamp shade coated with a light diffusing silicon layer comprising a.

The lampshade coated with the light diffusing silicon layer prepared according to the present invention can prevent the glass or plastic from falling and scattering when broken, dispersing the amount of ultraviolet rays, and lowering the shadow intensity in the room.

Lampshade, light diffusing agent, silicone rubber,

Description

A lampshade to be sprayed silicone layer

The present invention relates to a method of manufacturing a lamp shade coated with a light diffusing silicon layer for improving the light diffusivity and stability of the lamp shade.

On October 21, 1879, Edison completed the incandescent bulb of the remarkable carbon filament and put it into practical use, and electric lighting played a role as one of the means of bringing revolutionary productivity to human development.

Since the development of electric lighting fixtures, the lampshade that protects the eyes by concentrating the light in one place to raise the illumination and preventing the eyes from being dazzled has also undergone many trials and errors, and is now in keeping with the development of science. Lampshades with light diffusivity are used in everyday life.

The existing lampshade which is actually used commercially is mainly used acrylic resin, which is glass or thermoplastic resin, and in Korea Patent Publication No. 10-2006-0118677, lampshades using semi-transparent color glass are known, and domestic patent publication number 10-1999-0073130 and 10-2005-0000625 disclose lampshades using acrylic resins.

However, glass or thermoplastic acrylic resin, which is an existing material, is damaged due to heat generated from a light bulb, circular deformation, carelessness in handling, natural disaster (earthquake), etc. Personal injury has a big disadvantage.

In particular, the surface of the glass material has a problem that can act as a great threat to the body while scattered by breakage due to tensile stress when the invisible fine crack occurs.

In addition, PMMA, a thermoplastic acrylic resin mainly used as a lighting cover, has deformation of physical properties between 82 and 92 ° C, which is lower than 105 ° C, which is the maximum temperature of the lighting device. In the case of ignition between 287 ~ 298 ℃ is not suitable as a cover for a luminaire that requires heat resistance, and has a problem that is likely to ignite due to natural disasters such as short circuit or earthquake.

On the other hand, the use of lampshade for lighting is because the light is concentrated in one place to increase the degree of illumination and at the same time to protect the eyes from dazzle.

However, the conventional lampshade prevents glare of the lighting fixture, but has a problem in that light is not uniform and light transmittance is lower than the illuminance of the lighting fixture.

As described above, a conventional lamp shade has a problem of falling and falling in case of damage, resulting in personal injury and property damage. Therefore, the present invention, by applying a silicone layer to the interior of the lampshade used in the past, to prevent the falling of glass or thermoplastic resin in case of breakage, and includes a light diffusing agent in the applied silicon layer is extremely good light diffusion In addition, the object of the present invention is to provide a lampshade and a method of manufacturing a lampshade coated with a light-diffusing silicon layer that can evenly spread the light of the entire surface, and improve the transmittance of the beautiful color tone in nature.

The present invention to achieve the above object

a) applying a mixture of a silicone rubber, a light diffusing agent, a primer, and a viscosity modifier by spraying;

b) naturally drying the applied lampshade; And

c) heating and vulcanizing the naturally dried lampshade;

It provides a method of manufacturing a lamp shade coated with a light diffusing silicon layer comprising a.

Since the silicone rubber of step a) has heat resistance of 200 ° C. or higher than other polymer resins, the silicone rubber has excellent stability at 105 ° C., which is the highest temperature generated in a general lighting fixture, and is coated on the inside of glass and plastic lampshade and damaged when broken. And it prevents the fall of the plastic lampshade, when the combustion occurs, the flame spreading rate is low, and toxic substances do not occur, it is good to use as a coating material.

The silicone rubber is a mixture of dimethylsiloxane having a dimethylvinyl end group, trimethylated silica and methyl or dimethylvinylsiloxane having a dimethylvinyl end group, and the composition of the mixture is 100 parts by weight of dimethylsiloxane having a dimethylvinyl end group. It consists of 16 to 60 parts by weight of trimethylated silica and 1 to 10 parts by weight of methyl or dimethylvinylsiloxane having dimethylvinyl terminal groups. When trimethylated silica is 16 parts by weight or less with respect to 100 parts by weight of dimethyl siloxane having a dimethyl vinyl terminal group, it is not a good reason for not meeting the properties that can prevent free scattering. This is not good because it also fails to meet the properties that can be raised to prevent scattering. In addition, when methyl or dimethylvinylsiloxane having a dimethylvinyl end group is 1 part by weight or less with respect to 100 parts by weight of dimethylsiloxane having a dimethylvinyl terminal group, the reason for not satisfying the desired hardness is not good. Not good for a reason

The present invention includes a light diffusing agent in the silicon layer in order to improve light diffusivity, to uniformly diffuse the light on the front surface, to increase the permeability of natural beautiful tones, and to lower the intensity of shadows in the room. The light diffusing agent may be an organic light diffusing agent which is a homopolymer of acrylic resin, urethane resin, polyethylene resin, nylon resin, polystyrene resin, silicone resin, polycarbonate resin and polymethacrylate resin, or a copolymer thereof. Inorganic light diffusing agents such as alumina, glass, calcium carbonate, talc, mica, barium sulfate, zinc oxide, cesium oxide, titanium dioxide, and iron oxide or mixtures thereof can also be used. However, the use of an organic light diffusing agent is more preferable since the distribution of the light diffusing agent is uniform when mixing using a viscosity modifier.

The light diffusing agent may use a spherical light diffusing agent having an average particle diameter of 0.1 to 50 ㎛. If the average particle diameter of the light diffusing agent is 0.1 μm or less, the particles are small and the refractive index of the light is small, so that the light diffusivity is low. If the average particle diameter is 50 μm or more, the size of the particles is increased, so that the surface of the silicon layer is not smooth. In particular, a light diffusing agent having an average particle diameter of 0.5 to 10 mu m is better for even distribution in the light diffusing silicon layer.

In the method of manufacturing a lamp shade coated with the light diffusing silicon layer, the primer of step a) uses a silane coupling agent having high adhesion to silicone rubber, and examples of the silane coupling agent include vinyltrimethoxysilane, Vinyltriethoxysilane (Vinyltriethoxysilane), Vinylmethyldimethoxysilane, Vinylmethyldiethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane (2- (3,4 -Epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropyltriethoxysilane (3 -Glycidoxypropyltriethoxysilane, 3-Glycidoxypropylmethyldiethoxysilane, 3-Methacrylpropyltrimethoxysilane, 3-Meth 3-Methacrylpropylmethyldimethoxysilane, 3-Methacrylpropyltriethoxysilane, 3-Methacrylpropylmethyldiethoxysilane, or a mixture thereof. However, it is not limited thereto. The primer serves to strengthen the adhesion between the glass and the silicone rubber, and by applying the primer to the lampshade first and then applying the light-diffusing silicone rubber mixture solution by mixing and applying it together with the light-diffusion silicone rubber mixture solution Along with the role of a crosslinking agent in curing the diffusible silicon layer, the tensile strength of the silicon layer is enhanced.

In the method of manufacturing a lamp shade coated with the light diffusing silicon layer, the mixed solution of step a) may further include a colorant. The colorant is a product that complies with the RoHS (Restricting the use of Hazardous Substances) standard, and when mixed with silicone rubber, the use of the coloring agent is not limited and used for the purpose of changing the color depending on the purpose of use of the product.

The mixture of the silicone rubber, the light diffusing agent, and the primer is high in viscosity and cannot be applied by spraying. Therefore, a viscosity modifier is added to form a viscosity that is easy to spray. It is preferable to use an organic solvent, and the viscosity modifier may include toluene, acetone, dichloromethane, ethylene acetate, THF, methanol, ethylene glycol and dimethyl sulfoxide or a mixed solvent thereof.

The viscosity modifier is used so that the viscosity of the mixed solution is 80 to 150cps. If the viscosity of the liquid mixture is 80 cps or less, the liquid mixture is too thin and the thickness of the light-diffusion working cone layer to be applied becomes too thin, resulting in PIN HOLE phenomenon in which a needle hole is formed in the sprayed silicon layer. If the viscosity of the mixed solution is 150cps or more, the viscosity becomes too high, so that a silicon layer of even thickness is not formed, and the mixed liquid drops off from the spray nozzle, which is not good.

The mixed solution of step a) is used by mixing 5 to 40 parts by weight of light diffusing agent, 1 to 5 parts by weight of primer and 300 to 500 parts by weight of viscosity modifier with respect to 100 parts by weight of silicone rubber.

When the light diffusing agent is 5 parts by weight or less with respect to 100 parts by weight of silicone rubber, the light diffusivity is lowered. When the light diffusing agent is 40 parts by weight or more, the relative content of the silicone rubber is reduced, so that the tensile strength of the silicon layer is lowered. It is somewhat inferior.

In the mixed solution, the primer is used in an amount of 1 to 5 parts by weight based on 100 parts by weight of silicone rubber, and when used in an amount of 1 part by weight or less based on 100 parts by weight of silicone rubber, adhesive strength with silicone rubber is lowered, and 5 parts by weight of 100 parts by weight of silicone rubber is used. When used in parts by weight or more, the degree of curing of the silicon layer is increased, and the silicon layer may be broken when the lamp shade is broken.

The viscosity modifier of the mixed solution is used from 300 to 500 parts by weight based on 100 parts by weight of silicone rubber. When the viscosity modifier is 500 parts by weight or more with respect to 100 parts by weight of silicone rubber, the viscosity of the mixed liquid is lowered to 80 psi or less, and the thickness of the silicon layer becomes thin, PIN HOLE phenomenon occurs, and when it is 300 parts by weight or less based on 100 parts by weight of silicone rubber. Since the viscosity is 150 cps or more, an even thickness of silicon layer is not formed and the mixed liquid drops off from the spray nozzle, which is not good.

In the method of applying the light diffusing silicon layer to the lampshade, the spray method is applied to the lampshade having a curved surface such as a hemispherical shape or a shell shape, as well as a lampshade having a planar shape. This is because it is advantageous to apply the silicone layer.

After applying the mixed solution in a spray method, it is subjected to natural drying. In the natural drying, the time is appropriately selected according to the viscosity modifier, and in the case of toluene, for example, natural drying is performed for about 3 to 5 minutes. The reason why the natural drying is carried out after spraying is to volatilize a certain amount of viscosity modifier to shorten the next curing time, and to reduce the risk of fire in the case of highly volatile viscosity modifiers.

In the method of manufacturing a lamp shade coated with a light diffusing silicon layer, the vulcanization in step c) is vulcanized at 100 to 200 ° C. for 5 to 10 minutes. Here, vulcanization (加 시키는) refers to the transformation of a plastic material into an elastic material, rather than heating with sulfur. If the vulcanization temperature is below 100 ° C., the crosslinking speed of silicone rubber and primer is slow, so the vulcanization time is delayed. If the vulcanization temperature is more than 200 ° C., the curing of silicone rubber proceeds too much and the tensile strength is lowered. This is to prevent the occurrence of. In addition, the vulcanization time is vulcanized at 100 to 200 ° C. for 5 to 10 minutes. If the vulcanization time is 5 minutes or less, curing does not occur sufficiently. If the curing time is 10 minutes or more, the processing time of the product is increased, resulting in an increase in production cost. This happens.

The light-diffusion working cone layer obtained by carrying out the steps a) to c) of the method of manufacturing a lamp shade coated with the light-diffusing silicon layer has a thickness of 0.01 to 0.5 mm. However, the thinner the light diffusing silicon layer, the lower the tensile force. Therefore, in order to support glass and plastic to reduce the risk of scattering during breakage, the heavier the weight of the glass and plastic, the thicker the light diffusing silicon layer needs to be. have. Therefore, by repeating steps a) to c) of the manufacturing method according to the material and weight of the glass and plastic to adjust the thickness of the desired light diffusion silicon layer.

The lampshade coated with the light diffusing silicon layer prepared according to the above-described manufacturing method supports the glass and plastics of the silicon layer as compared to the conventional lampshade, and thus prevents the fall from scattering upon breakage and includes a light diffusing agent. Therefore, the irradiation amount of ultraviolet rays is dispersed, the shadow intensity in the room is lowered, and the permeability of natural beautiful tones is high.

Hereinafter, the present invention will be described in detail with reference to Examples and Experimental Examples, but the following Examples and Experimental Examples do not limit the spirit of the present invention.

EXAMPLE

The mixer used in the present invention used a self-made mixer, the mixer used in the mixer used a 500L cylindrical vessel, the impeller used a propeller-type impeller, 5HP, 0 ~ 1700rpm / min variable speed motor And stirred. The spray used for spraying the mixed liquid was sprayed using a large yarn, model number W-71, at an air pressure of 6 kg / cm 2. The silicone rubber used in the mixed solution was liquid silicone of HRS Co., Ltd., a silicone specialized company, and the liquid silicone was methyl or dimethyl having dimethyl siloxane, trimethylated silica, and dimethyl vinyl terminal group having a dimethyl vinyl terminal group. Mixture of vinylsiloxanes.

Example 1 Preparation of Lampshade 1 Applying Light Diffusion Silicon Layer

Silicone rubber (HRS, LSI-200 / 50), liquid silicone, viscosity 300-500 Pa.s, weight average molecular weight (Mw) 100,000, 65% dimethylsiloxane having dimethyl vinyl terminal in a 500 L cylindrical container, trimethylated 40% of silica 30%, methyl or dimethylvinylsiloxane having 5% of dimethylvinyl siloxane) 40kg, light diffusing agent (toshiba, tospearl 105, average particle diameter of 0.5㎛) 10kg, primer (shinetsu, KBM-403, 3-glycidoxypropyl 1.2 kg of trimethoxysilane (3-Glycidoxypropyltrimethoxysilane) and 160 kg of toluene were added thereto, and the mixture was stirred and stirred at 120 rpm / min for 10 minutes. The mixture was filled with a spray gun weighed 10 kg and sprayed onto the light source side of the hemispherical lampshade for 10 seconds. The lampshade was naturally dried for 5 minutes and then quenched at 100 ° C. for 10 minutes. The lamp shade was reduced to room temperature to prepare lampshade 1 coated with a light diffusing silicon layer, wherein the light diffusing silicon layer formed a thickness of 0.15 mm.

Example 2 Preparation of Lampshade 2 Applying Light Diffusion Silicon Layer

Silicone rubber (HRS, LSI-200 / 50, liquid silicone, viscosity 300 ~ 500Pa, average molecular weight (MW) 100,000 g / mol, dimethylsiloxane 65%, trimethylated in 500L cylindrical container) 40% of silica 30%, methyl or dimethylvinylsiloxane having 5% of dimethyl vinyl groups) 40 kg, 3 kg of light diffusing agent (toshiba, tospearl 130, average particle diameter 3 µm), primer (shinetsu, KBM-503, 3-methacrylpropyl tree) 0.5 kg of methoxysilane (3-Methacrylpropyltrimethoxysilane) and 200 kg of toluene were added thereto, and mixed by stirring at 120 rpm / min for 10 minutes. The mixture was filled with a spray gun weighed 10 kg and sprayed on the light source side of the hemispherical lampshade for 8 seconds. The lampshade was naturally dried for 5 minutes and then quenched at 100 ° C. for 10 minutes. The lampshade was cooled to room temperature to prepare lampshade 2 coated with a light diffusing silicon layer, wherein the light diffusing silicon layer formed a thickness of 0.1 mm.

Example 3 Preparation of Lampshade 3 Applying Light Diffusion Silicon Layer

Silicone rubber (HRS, LSI-100 / 50, liquid silicone, viscosity 300-500 Pa.s, average molecular weight (Mw) 100,000 mol / g, dimethyl siloxane 70% dimethylsiloxane) 40% of trimethylated silica, 1% of methyl or dimethylvinylsiloxane having dimethylvinyl terminal groups, 40 kg of light diffusing agent (toshiba, tospearl 2000B, average particle diameter of 6 μm), 16 kg of primer (shinetsu, KBM-1003, vinyltrime 2 kg of methoxysilane (Vinyltrimethoxysilan) and 150 kg of toluene were added and mixed by stirring at 120 rpm / min for 10 minutes. The mixture was filled with a spray gun weighed 10 kg and sprayed on the light source side of the hemispherical lampshade for 25 seconds. The lampshade was naturally dried for 5 minutes and then quenched at 150 ° C. for 7 minutes. The lamp shade was cooled to room temperature to prepare lamp shade 3 coated with a light diffusing silicon layer, wherein the light diffusing silicon layer formed a thickness of 0.3 mm.

Example 4 Preparation of Lampshade 4 Applying Light Diffusion Silicon Layer

Silicone rubber (HRS, LSI-100 / 50, liquid silicone, viscosity 300-500 Pa.s, average molecular weight (Mw) 100,000 g / mol, dimethyl siloxane 70%, trimethyl in a 500 L cylindrical container) Graded silica 29%, methyl or dimethylvinylsiloxane 1% having dimethylvinyl end groups 40 kg, light diffusing agent (KOLON, S-10, methyl methacrylate / styrene copolymer, Tg: 120 ° C, refractive index (RI): 1.49 / 1.59, average particle diameter 10 μm 16 kg, primer (shinetsu, KBM-1003, vinyltrimethoxysilan) 1.5 kg, colorant (Holliday Pigments, Ultramarine Pigment, sodium alumino sulfur silicate ( Sodium alumino sulpho silicate)) 1kg and toluene 180kg were added and mixed by stirring at 120rpm / min, 10 minutes. The mixture was filled with a spray gun weighed 10 kg and sprayed onto the light source side of the hemispherical lampshade for 10 seconds. The lampshade was naturally dried for 5 minutes and then quenched at 200 ° C. for 5 minutes. The lampshade was cooled to room temperature, and then sprayed, dried and vulcanized four times to prepare a lampshade 4 coated with a light diffusing silicon layer, wherein the light diffusing silicon layer formed a thickness of 1.4 mm.

Experimental Example 1 Comparison between a lampshade and a lampshade coated with a light diffusing silicon layer.

The lampshade 4 coated with the light diffusing silicon layer prepared in Example 4 and the lampshade before applying the light diffusing silicon layer were fixed to the floor, and a weight of 100 g was freely dropped at a height of 1.5 m of the lamp shade. 3 and 4 are shown. The lampshade before the light-diffusing silicon layer was shattered and broken into sharp debris, but the lampshade 4 with the light-diffusing silicon layer applied cracked the lampshade but supported the fragment of the lampshade where the light-diffusing silicon layer was destroyed. It was confirmed that it does not scatter on the floor.

The silicone lampshade manufactured by the manufacturing method according to the present invention is a fluorescent lamp lamp shade, LED sign lamp lamp, lamp lamp for indoor interior, stand type lamp lamp, replacing the existing lamp shade currently used in the industry more improved drop stability, light diffusibility and resistance It can be used as a lampshade having combustibility.

1 is a schematic view of a lampshade coated with a light diffusing silicon layer.

2 is a schematic diagram of a process according to a manufacturing method.

3 is a breakdown test result of a lamp shade coated with a light diffusing silicon layer.

4 is a breakdown test result of a lamp shade not coated with a light diffusing silicon layer.

1. Lampshade 2. Light Diffusion Silicon Layer

3. Bulb 4. Spray Nozzle

5. Light Diffusion Silicon Spray 6. Heater

7. Conveyor Belt

Claims (16)

a) applying a mixture of silicon rubber, a light diffusing agent, a primer, and a viscosity modifier to the lampshade by spraying; b) naturally drying the applied lampshade; And c) heating and vulcanizing the naturally dried lampshade; Method of manufacturing a lamp shade comprising a light diffusing silicon layer comprising a. The method of claim 1, The silicone rubber of step a) comprises 16 to 60 parts by weight of trimethylated silica and 1 to 10 parts by weight of methyl or dimethylvinylsiloxane having dimethylvinyl terminal groups based on 100 parts by weight of dimethylsiloxane having dimethylvinyl terminal groups. A method of manufacturing a lamp shade comprising a light diffusing silicon layer, characterized in that. The method of claim 1, The light diffusing agent of step a) is acrylic resin, urethane resin, polyethylene resin, nylon resin, polystyrene resin, silicone resin, polycarbonate resin homopolymer, polymethacrylate resin homopoly or copolymers thereof; And silica, alumina, glass, calcium carbonate, talc, mica, barium sulfate, zinc oxide, cesium oxide, titanium dioxide, iron oxide, or mixtures thereof. Way. The method of claim 3, wherein The light diffusing agent of step a) is a manufacturing method of a lamp shade comprising a light diffusing silicon layer, characterized in that the organic light diffusing agent. The method of claim 4, wherein The method of manufacturing a lamp shade comprising a light diffusing silicon layer, characterized in that the light diffusing agent of step a) is a spherical light diffusing agent having an average particle diameter of 0.1 to 50 ㎛. The method of claim 1, The primer of step a) is vinyltrimethoxysilane, vinyltriethoxysilane, vinylmethyldimethoxysilane, vinylmethyldiethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3- Glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 3-methacrylpropyltrimethoxy Light diffusing silicon layer, characterized in that selected from the group consisting of silane, 3-methacrylpropylmethyldimethoxysilane, 3-methacrylpropyltriethoxysilane, 3-methacrylpropylmethyldiethoxysilane and mixtures thereof Method of manufacturing a lamp shade comprising a. The method of claim 6, The primer of step a) comprises a light diffusing silicon layer, characterized in that one kind selected from vinyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane and 3-methacrylpropyltrimethoxysilane. Method of making lampshade. The method of claim 1, The viscosity modifier of step a) is toluene, acetone, dichloromethane, ethylene acetate, THF, methanol, ethylene glycol and dimethyl sulfoxide or a mixed solvent thereof, characterized in that the light diffusing silicone layer Manufacturing method of lampshade containing. The method of claim 8, The method of manufacturing a lamp shade comprising a light diffusing silicon layer, characterized in that the viscosity modifier of step a) is toluene. The method of claim 1, The mixture of step a) is a manufacturing method of a lamp shade comprising a light diffusing silicon layer, characterized in that the viscosity of 80 to 150cps. The method of claim 1, The mixture of step a) is a light diffusing silicone layer, characterized in that the mixture of 5 to 40 parts by weight, 1 to 5 parts by weight of primer and 300 to 500 parts by weight of viscosity modifier with respect to 100 parts by weight of silicone rubber Manufacturing method of lampshade containing. The method of claim 1, The vulcanization of step c) is a manufacturing method of a lamp shade comprising a light-diffusing silicon layer, characterized in that the vulcanization at 100 to 200 ℃ for 5 to 10 minutes. The method of claim 1, The light diffusing silicon layer is a method of manufacturing a lamp shade comprising a light diffusing silicon layer, characterized in that the thickness of the light diffusing silicon layer in one coating, 0.01 to 0.5mm. The method of claim 1, The method of manufacturing a lamp shade comprising a light diffusing silicon layer, characterized in that to repeat the steps a) to c) to adjust the thickness of the light diffusing silicon layer. The method of claim 1, The method of manufacturing a lamp shade comprising a light diffusing silicon layer, characterized in that the mixture of step a) further comprises a colorant. (delete)

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