RU2057025C1 - Multilayer composition material for bullet-proof glazing - Google Patents

Abstract

FIELD: shock-resistant composition materials. SUBSTANCE: intermediate layers between silicate glasses were made of polyvinylbutyral film and/or composition consisting of, mas. p.: butylacrylate 30-33; butylmethacrylate 65-67; acrylic acid 2-3 per 100 monomers mixture of ethylene glycol dimethacrylic ester 0.1-0.2; methylmethyldiethoxysilane methacrylate 0.1-0.5 and dicyclohexylperoxydicarbonate 0.05-0.08. Intermediate layer between external and internal glazing members is made of composition consisting of, mas. p.: butylacrylate 50-53; butylmethacrylate 45-47; acrylic acid 2-3 per 100 monomers mixture of triallyl(iso)cyanurate 0.5-1.0; methylmethyldiethoxysilane methacrylate 0.05-0.1 and dicyclohexylperoxydicarbonate or its mixture with 0.15-0.2 benzoine 0.1-0.15. Thickness of each silicate layer, internal member, each intermediate layer between silicate glasses and intermediate layer between external and internal member is 3-6, 10-25, 0.76-2.0 and 0.3-4 mm, respectively. EFFECT: enhanced quality of composition. 1 tbl

Description

 The invention relates to multi-layer impact-resistant composite materials based on silicate and organic glasses, intended, in particular, for glazing bulletproof armored cash-in-transit vehicles.

 According to the requirements, a multilayer composite material should protect the crew from being hit by a bullet from a Kalashnikov assault rifle (7.62 mm caliber) with an impact energy of at least 2000 J in a burst of three shots without the formation of fragments from the internal glazing element.

Known resistant to punching materials having a four-layer structure and consisting of an external (relative to the direction of impact of the shock load) thermoplastic polymer layer 2.5-6.35 mm thick, a back layer of polycarbonate 0.7-5.6 mm thick, placed between them a layer of glass with a thickness of 2.5-6.35 mm and located between the glass layer and the polycarbonate layer of the thermoplastic polymer layer. In this case, the individual layers are interconnected using adhesive layers [1]
The proposed punch-resistant material does not stand the test of a Kalashnikov assault rifle. The multilayer product is destroyed during the first shot.

Known bulletproof laminated product consisting of four sheets of silicate glass with a thickness of 5 mm each, bonded together by a transparent polyvinyl butyral film with a thickness of 0.3 mm, and a transparent structural polymer, for example polycarbonate. The total thickness of the product is 33 mm, weight 1 m ² 70 kg. The product withstands the impact of a bullet flying at a speed of 1000 m / s from a distance of 10 cm [2]
However, it does not stand the test of a bullet from a Kalashnikov assault rifle, the product is destroyed during the first shot.

Also known is a bulletproof multilayer product using layers of an ionomer based on a water-insoluble crosslinked copolymer of ethylene and methacrylic acid or its metal salts (Zn, Na) in a ratio of 95: 5, partially neutralized by di- or triamine. According to an example, the product consists of four layers of chemically toughened glass and three layers of ionomer. The outer layers of glass have a thickness of 2.5 mm and 1 mm inner 12 mm each, the thickness of each ionomer layer 5 mm The surfaces of all layers are connected by a silane coupling. The product is characterized by increased transparency, extended service life in a wide temperature range, low cost. Total product thickness 42.5 mm [3]
The product withstands the test of a bullet from a Kalashnikov assault rifle in two shots, with the third shot it is destroyed.

 Closest to the proposed one is a multilayer composite material for bulletproof glazing, including an external element made of at least five layers of silicate glass, one layer of an internal element made of polymethacrylate, and intermediate layers, with a total material thickness of at least 64 mm.

The outer element consists of at least three layers of glass, the thickness of the central layer (5.6–25.4 mm) must be greater than the thickness of the outermost layers (0.76–5.59 mm), and the central layer may consist of several glasses . The constituent elements of the outer and inner layers are glued together with a 0.86 mm thick film from a block copolymer of siloxane and carbonate (ZR 33-20), and are separated by an 6.35 mm thick air gap. The inner element includes additional layers of polycarbonate, glass and cured resin. The total thickness of the product reaches 71 mm. This design withstands the impact of a rifle bullet caliber 7.62 mm [4]
The material withstands without destruction tests with a burst of three shots from a 5.45 mm assault rifle with an impact energy of 1316 J and only one 7.62 mm Kalashnikov assault rifle with an impact energy of 2010 J.

 The purpose of the invention is the creation of a multilayer product used as armored glass for special vehicles and withstanding at least three rounds from a Kalashnikov assault rifle with a 7.62 mm bullet with an impact energy of at least 2000 J.

The goal is achieved in that in a multilayer composite material for bulletproof glazing, including an external element made of at least five silicate glasses, one layer of an internal element made of polymethylmethacrylate, and intermediate layers, with a total material thickness of at least 64 mm, intermediate layers between silicate glasses made of polyvinyl butyral film (or) from a composition, including, by weight butyl acrylate (BA) 30-33; butyl methacrylate (BMA) 65-67; acrylic acid (AK) 2-3; per 100 mixture of butyl acrylate, butyl methacrylate and acrylic acid dimethacrylic ester of ethylene glycol (DMEG) 0.1-0.2; methacrylate methylmethyldiethoxysilane (K-2) 0.1-0.5 and dicyclohexylperoxydicarbonate (Novinit) (MS ₁ ) 0.05-0.08, and the intermediate layer between the outer and inner glazing elements is made of a composition, including, by weight butyl acrylate 50-53; butyl methacrylate 45-47; acrylic acid 2-3; per 100 mixture of butyl acrylate, butyl methacrylate and acrylic acid 0.5-1.0, triallyl (iso) cyanurate (TAIC); methacrylate methylmethyldiethoxysilane 0.05-0.1 and dicyclohexylperoxydicarbonate or a mixture thereof with 0.15-0.2 benzoin (MS ₂ ) 0.1-0.15, the thickness of each silicate glass, the inner element, each intermediate layer between silicate glasses and the intermediate layer between the outer and inner elements is 3-6, 10-25, 0.76-2.0, 3-4 mm, respectively.

The use of new compositions MS ₁ and MS ₂ allows to obtain a multilayer composite material, which with the same thickness as the material of the prototype, can withstand at least three rounds from a Kalashnikov assault rifle with a 7.62 mm bullet with an impact energy of at least 2000 J.

The structure of the multilayer composite materials and formulations for the preparation of intermediate layers between silicate glasses (MS ₁ ) and between the internal and external glazing elements (MS ₂ ) are shown in the table (examples 1-2).

 Obtaining an external glazing element is as follows.

A previously prepared and evacuated composition MS _{1 is} loaded into a mold composed of silicate glasses or silicate triplexes obtained by pressing a polyvinyl butyral film as an intermediate layer by pressing, or silicate glass and silicate triplex using a PVC gasket tube and clamps. The curing of the composition is carried out thermally at 60 ^about C for 12 hours

 After curing, the mold is freed from the clamps, and the PVC tube remains as a sealing loop. The remaining silicate glasses or triplexes are glued together in a similar manner according to the examples given in the table.

Thus obtained, the external element is glued to the internal element, which is a polymethyl methacrylate glass, similar to the method described above for gluing silicate glasses (triplexes) together using the composition MS ₂ , which is a mixture of the composition indicated in the table that was previously polymerized to 7-10%. Curing of the composition is carried out thermally or at 60 ° ^C for 12 hours or by UV-curing for 4 hours.

 The description of the examples and the table shows that the invention allows to obtain a multilayer product that can withstand at least three rounds from a Kalashnikov assault rifle with a 7.62 mm bullet with an impact energy of at least 2000 J, which makes it possible to use it as armored glass for special vehicles.

The specified technical result is not achieved when changing the formulation of the intermediate layers MS ₁ and MS ₂ or replacing the formulation of MS ₂ with MS ₁ .

Claims (1)

 MULTI-LAYERED COMPOSITE MATERIAL FOR Bulletproof glazing, including an external element made of at least five layers of silicate glass, one layer of an internal element made of polymethylmethacrylate, and intermediate layers with a total material thickness of at least 64 mm, characterized in that the intermediate layers between silicate glasses made of polyvinyl butyral film and / or of a composition comprising 30 to 33 parts by weight butyl acrylate, 65 - 67 parts by weight butyl methacrylate, 2 to 3 parts by weight acrylic acid, per 100 parts by weight a mixture of butyl acrylate, butyl methacrylate and acrylic acid 0.1 to 0.2 wt.h. ethylene glycol dimethacrylic ester, 0.1-0.5 parts by weight methacrylate methylmethyldiethoxysilane and 0.05 to 0.08 wt.h. dicyclohexylperoxydicarbonate, and the intermediate layer between the outer and inner elements is made of a composition comprising 50 to 53 parts by weight of butyl acrylate, 45 to 47 wt. including butyl methacrylate, 2 to 3 parts by weight acrylic acid, per 100 parts by weight a mixture of butyl acrylate, butyl methacrylate and acrylic acid 0.5 to 1.0 wt.h. triallyl (iso) cyanurate, 0.05 - 0.1 parts by weight methacrylate methylmethyldiethoxysilane and 0.1 to 0.15 wt. including dicyclohexyl peroxydicarbonate or a mixture thereof with 0.15 - 0.2 wt. including benzoin, the thickness of each silicate glass of the inner element, each intermediate layer between the silicate glasses and the intermediate layer between the outer and inner elements is 3-6, respectively; 10 to 25; 0.76 - 2.0 and 3 - 4 mm.

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