JPH03164452A - Production of safety sandwich glass plate - Google Patents

Abstract

PURPOSE:To obtain the product which has a uniform thickness and high adhesive strength without receiving the influence of the shape of punching, etc., by interposing a specific plastisol at the time of lamination into the sandwich glass plate formed by sandwiching a punching metal or metallic net. CONSTITUTION:The sandwich glass plate formed by inserting the punching metal or metallic net between a glass plate and a glass plate is produced. The film formable plastisol essentially consisting of an epoxy group-contg. vinyl chloride resin having good flowability is interposed between the glass plate and the punching metal and the plates are laminated and press welded under heating. The intrusion of bubbles and the nonuniformity of the thickness by the defect in flowing are eliminated when the punching metal punched only in the upper part or distributed with various punching sizes is used. The safety sandwich glass plate which is securely joined with the punching metal and the glass plates and has the uniform thickness is, therefore, obtd. without receiving the influence of the size of the mesh of the metallic net and the shape, size and distribution of the punching.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a plastisol for safety laminated glass plates, and a method for producing safety laminated glass plates with built-in sturdy punched metal that can be locked safely and prevented from entering. It is related to.

[Conventional technology] Conventionally, a flexible and strong interlayer film such as a polyvinyl butyral film or an ethylene-vinyl acetate copolymer film has been used between a glass plate and a punched metal, but the size of the punching in the punching metal and the strength of the punching There is a limit to the distribution, and if you use a type with punching only in the upper part or a type with large and small punches distributed, the thickness of the laminated glass plate will be uneven, or air bubbles will remain between the glass plates. There is.

[Problem to be solved by the invention]

The present invention relates to the dimensions of the metal mesh between the laminated glass plates, the shape and size of the punching of the punched metal,
The object of the present invention is to provide a method for manufacturing a safety laminated glass plate that has a uniform thickness that is not affected by distribution and has a strong bond between the punched metal and the glass plate.

[Means for Solving the Problems] In order to solve the above-mentioned drawbacks, the present inventors have found that if an epoxy group-containing vinyl chloride resin is used in plastisol with good fluidity, air bubbles may be mixed in due to poor flow and the thickness may be insufficient. Focusing on the ability to improve uniformity, the manufacturing method of the present invention was successfully applied.

That is, the present invention provides a laminated glass plate in which a punched metal or a metal mesh is sandwiched between the glass plates, and a film-forming plastisol that essentially contains an epoxy group-containing vinyl chloride resin between the glass plate and the punched metal. The present invention provides a method for manufacturing a safety laminated glass sheet, which is characterized by laminating the sheets with the glass sheets interposed therebetween and bonding them under heat and pressure.

The epoxy group-containing vinyl chloride resin used in the present invention is: 1) a copolymer of vinyl chloride, a monomer having an epoxy group, and an optional monomer copolymerizable with these; ) A vinyl chloride copolymer containing vinyl chloride monomer as the main component with an epoxy group added, 3)
A composition in which a vinyl chloride copolymer is dispersed with an epoxy group-containing resin that is compatible with the vinyl chloride copolymer can be used.

In any epoxy group-containing vinyl chloride resin,
An epoxy group content of 0.05 to 5% by weight can be used.

If the epoxy group content is too low, the adhesive strength to glass will be poor, and if it is too high, the adhesive strength will be too strong and the penetration resistance will be poor.

Examples of monomers having epoxy groups used in the epoxy-containing vinyl chloride resin of type 1) include glycidyl ethers of unsaturated alcohols such as allyl glycidyl ether and methallyl glycidyl ether, glycidyl methacrylate, glycidyl acrylate, and glycidyl Glycidyl esters of unsaturated acids such as p-vinyl benzoate, methyl glycidyl itaconate, glycidyl ethyl maleate, glycidyl vinyl sulfonate, glycidyl (meth)allylsulfonate, butadiene monoxide, vinylcyclohexene monooxide, 2-
Examples include epoxide olefins such as methyl-5,6-epoxyhexene.

In the present invention, monomers having an epoxy group and monomers to be copolymerized as necessary with vinyl chloride include fatty acid vinyls such as vinyl acetate and vinyl propionate, and olefins such as ethylene and propylene. vinylidene halides such as vinylidene chloride and vinylidene fluoride; vinyl ethers such as imptyl vinyl ether, methyl vinyl ether, and ethyl vinyl ether;
Examples include allyl compounds such as allyl chloride and methyl allyl ether.

Using these monomers, well-known vinyl chloride polymerization methods such as suspension polymerization and emulsion polymerization can be used to produce the vinyl chloride copolymer used in the present invention. For example, when used as a plastisol, it can be produced by emulsion polymerization or microsuspension polymerization, which is a commonly used method for producing vinyl chloride resin for paste processing, in order to maintain appropriate fluidity of the plastisol.

In the epoxy group-containing vinyl chloride resin of type 2),
Examples of the method for adding an epoxy group include a method in which a vinyl chloride resin is dehydrochlorinated by heat treatment or contact with an alkali compound, and then epoxidized with an organic peracid or the like.

The vinyl chloride resin used here may be a copolymer mainly composed of vinyl chloride monomer units and having as a constituent unit the monomer component units optionally used in 1).

The epoxy group-containing resin of the type 3) is, for example, a copolymer of a monomer having an epoxy group and a copolymerizable monomer, and is compatible with the vinyl chloride resin used in 2). It is possible to use a mixture of the vinyl chloride resin and the like.

In addition to plasticizers, stabilizers, ultraviolet absorbers, antioxidants, lubricants, fillers, colorants, etc. can be mixed with the epoxy group-containing vinyl chloride resin used in the present invention, depending on the purpose. .

Furthermore, it is also possible to use a resin compatible with vinyl chloride, such as another vinyl chloride resin, acrylic resin, or epoxy resin.

As the plasticizer to be added to the epoxy group-containing vinyl chloride resin of the present invention, those generally referred to as plasticizers for polyvinyl chloride can be widely used. For example, aliphatic plasticizers include dioctyl adipate, butyl diglycol adipate, dioctyl azelate, dibutyl sebacate, diisodecyl adipate, etc., and phthalate plasticizers include dioctyl phthalate, dibutyl heptalate,
diisobutyl phthalate, butyl benzyl phthalate,
Examples of dilauryl phthalate and diheptyl phthalate include trixylenyl phos 7 as a phosphoric acid plasticizer.
ate, tricresyl phosphate, talesyl diphenyl phos7ate, trischloroethyl phosphate, trischloroethyl phosphite, tributyl phos7ate, and the like. Examples of epoxy derivatives include epoxidized soybean oil and epoxy fatty acid monoester. Polyester plasticizers can also be used in some cases.

The appropriate amount of the plasticizer to be blended is 20 to 120 parts by weight per 100 parts by weight of the vinyl chloride resin. If there is too much plasticizer, the film strength will decrease, and if it is too little, the viscosity of Glastisol will increase and the workability of coating will deteriorate.

Heat stabilizers that may be added to plastisol if desired include alkylated tin compounds of fatty acids such as butyltin laurate, butyltin maleate, and octyltin maleate, and alkyl compounds such as di-normal octyltin bis(in-octylthioglycolic acid ester) salt. Tin-containing sulfur compounds are preferably used. It is also possible to use a metal soap type stabilizer together with these.

Penzotriazole-based UV absorbers are excellent as UV absorbers to be added to Glastisol of the present invention, such as 2(2'-hydroxy-5'-methylphenyl)penzotriazole, 2(2'-hydroxy-3'tert-butyl-
5′-methylphenyl)-5-chlorobenzotriazole, 2(2′-hydroxy-3′,5″-tertiarybutylphenyl)-5-chlorobenzotriazole,
2(2°-hydroxy-4″-octoxy7enyl)penzotriazole and the like can be preferably used.

In addition, 7-enol antioxidants are excellent as antioxidants used in the plastisol of the present invention, such as 2,6-
Ditertiary butyl p-cresol. 2,2°-methylenebis(4-methyl-6-tert-butyl-7enol), 4.4″butylidenebis(3-methyl-6-
tert-butyl 7-enol), 4,4'-thiobis(3-methyl-6-tert-butyl 7-enol), and the like.

Further, if necessary, a crosslinking agent, a thickener, a diluent, a silane type or a titanoate type coupling agent, etc. are blended.

Plastisol is prepared by mixing a resin, a plasticizer, various compounded materials, etc. and defoaming according to a conventional method.

Since plastisol is in liquid form, dust and foreign matter can be removed using filters, etc., and storage and transportation are handled in closed systems such as tanks and pipelines, making quality control easy and suitable for automation. There is.

Furthermore, the punching metal used in the present invention is a metal plate with holes made by punching, and is called a punching metal or a punching plate, and the metal mesh used in the present invention is It is a mesh of metal wires. The type of metal can be used without any particular restrictions.

In the present invention, the method of laminating Glastisol with punching metal or the like interposed between the glass plates is as follows: coat the glass plate with a blade coater, roll coater, 7. ')＋
Plastisol is applied using a coating machine such as a J-n coater or a blow coater spray coater, and then a punched metal or metal mesh is pasted on top of it to avoid air bubbles, and then plastisol is applied on top of that using the above coating machine. , Glass plates are bonded together to prevent air bubbles from forming into a laminate, or plastisol is applied to the glass plate using the above coating machine, heated to gel, and then a punching metal etc. is placed on it and plastisol is applied again to form a glass plate. Conventionally known lamination methods, such as a method of laminating the materials without air bubbles to form a laminate, can be used.

The laminated safety glass sheets are then heated to gel the plastisol layer and form a strong, elastic membrane. As a heating method here, heating devices used in normal paste processing, such as hot air circulation heating, (far) infrared heating, dielectric heating, and induction heating, can be used.

〔Example】

The present invention will be explained in more detail with reference to Examples below.

Example\l Vinyl chloride 90% by weight, glycidyl methacrylate 10
To 100 parts by weight of an epoxy group-containing vinyl chloride resin with an average particle diameter of 1 μm and an average degree of polymerization of 800, 45 parts by weight of dioctyl adipate, 15 parts by weight of dioctyl 7-talate, 4 parts by weight of dibutyltin polymercaptide, 2,2
0.3 parts by weight of '-methylenebis-4-methyl-6-tert-butylphenol and the like are placed in a vacuum high-speed defoaming mixer, mixed, and defoamed.

Next, 300+*mX300ars, thickness 3
The above plastisol was applied to a 1RrR glass plate using a blade coater to a thickness of 0.4+u+, and punched metal (2 9 5mi x 2
9 5m scrap, thickness 0. 3 terms, hole diameter 3 old,
Then, apply plastisol on the punched metal to a thickness of 0.4 mm using a Ny7 coater, and finally, place a glass plate on top of it to prevent air bubbles. Laminated and pasted together like this. This laminate was heated at 180°C for 30 minutes to obtain a safety laminated glass plate.

Example 2 The same as Example 1 except that punched methanol (295 mm x 295 ms, thickness 0.3 rtrtas hole diameter 6, 111% hole distance 8 cm) having the pattern shown in Fig. 2 was used instead of the punched metal of Example 1. A safety laminated glass plate was obtained.

Example 3 Instead of the punched metal of Example 1, as shown in Figure 3, a punched metal (295m + *x 2 9 5ms+, thickness 0
．． A safety laminated glass plate was obtained in the same manner as in Example 1, except that 3++v+, 6 amd for the left half, and 3 mmu for the right half) were used.

Example 4 Instead of the punching metal of Example 1, as shown in FIG. 4, a punching metal (295**x2 9 5 +u+
, thickness 0. 3 yarns upper half 3I+llII1
A safety laminated glass plate was obtained in the same manner as in Example 1 except that the lower half (without punching) was used.

Example 5 Instead of the punched metal of Example 1, a stainless steel metal mesh with a grid pattern of 20 mm in pitch and a wire diameter of 0.5 was used. I got a glass plate.

Comparative Example 1 A commercially available interlayer film for laminated glass plate 15 was placed on a glass plate of 300mm x 300ars1 thickness: 3+m
Place mil1 (made of polyvinyl butyral) with a moisture content of 0.5 wt%, and then punch metal with the pattern shown in Figure 1 (295 + uix 295 mm,
Thickness 0. 3 am) was placed thereon, and a film prepared in the same manner as the above-mentioned interlayer film and a glass plate were placed thereon, and the mixture was passed between rubber rollers at 70 to 75°C for preliminary pressure bonding. After that, 13
A safety laminated glass plate was obtained by heating and pressing in a pneumatic autoclave at 0°0.13 to 14 kg/cra for 30 minutes.

Comparative Example 2 Comparative Example 1 except that a punching metal with the pattern shown in Figure 4 (295m + * 295 open, 0.3m thick, upper half 3 ravgl, lower half without punching) was used instead of the punched metal of Comparative Example 1. A safety laminated glass plate was obtained in the same manner as above. However, the bottom of this laminated glass plate was thicker than the top, and air bubbles remained.

〔Effect of the invention】

According to the manufacturing method of the present invention, it is possible to obtain a safety laminated glass plate without bubbles and always having an accurate uniform thickness without being affected by changes in the shape, size, and distribution of punches in the punched metal.

[Brief explanation of the drawing]

FIG. 1, FIG. 2, FIG. 3, and FIG. 4 are plan views of punched metals according to embodiments of the present invention. Figure l Figure 3 Figure 2 Figure 4

Claims (1)

[Claims] 1. In a laminated glass plate in which a punched metal or metal mesh is sandwiched between glass plates, a film-forming plastisol containing an epoxy group-containing vinyl chloride resin as an essential component is interposed between the glass plate and the punched metal, and laminated, A method for producing a safety laminated glass plate, which is characterized by heat-press bonding.