RU2522335C1 - Filling compound for fireproof glazing - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: filling compound for fireproof glazing contains epoxy resin Epoxy-520, a plasticiser - tricresyl phosphate, a fire-retardant - triphenyl phosphate and a curing agent - triethylene tetramine.

EFFECT: invention provides a higher fire-resistance rating of structures and prevents leakage of the compound from multilayer glass under high temperatures.

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Description

The invention relates to casting compositions suitable for use as fire retardant interlayers in the manufacture of fireproof glass, which can be used for glazing windows, doors, translucent partitions and fences, balconies, stained glass windows, attics, etc.

A known casting composition used as fire-resistant glazing and containing a polymeric material made in the form of a photocurable adhesive composition from a methacrylic ether derivative with the addition of phosphorus-containing oligoester acrylates and imide derivatives of acrylic and methacrylic acids (RU 2146752 C1, 03.20.2000).

Known casting composition used as a flame retardant non-combustible material, designed for casting compositions and containing a monomer belonging to the class of derivatives of acrylamide and / or methacrylamide - 3-50, a binder monomer that is a derivative of acrylamide and / or methacrylamide, a polymer under the influence, for example, heating - 0.05-5, a freeze-thawing additive - polyhydric alcohol or a mixture of polyhydric alcohols, as well as water-soluble carbohydrates, for example sucrose, lactose, glucose, fructose and the like - 5-20, chloride alkali and / or alkaline earth metals - 5-50, distilled water - the rest (RU 15725 U1, 10.11.2000).

The closest technical solution for the combination of essential features and the achieved result to the claimed invention is the casting composition used in the “Fire-resistant translucent building structure” for glazing windows, balconies, doors, as well as in structures used in stained-glass windows, attics, partitions and fences or their constituents and triplexes and containing the following components: structure-forming - oligoester urethane acrylates, dimethyl acrylate and metazine, plasticizer - tricresyl phosphate, will slow down burning spruce - dimethyl methylphosphonate in the following components, wt.h .:

1. Oligoester urethane acrylates (OEA) - 70

2. Metazine - 1

3. Dimethyl acrylate (DMA) - 15

4. Dimethylphosphonate (DMF) - 20

5. Tricresylphosphate (TKF) - 35

(RU 2258790 C1, 08.20.2005).

A disadvantage of the known casting composition is that the polymerizate obtained from it has a low degree of conversion, high smoke generation and a relatively low oxygen index.

The objective of the present invention is to provide a casting composition for interlayers in a laminated fireproof glass, the polymerizate of which is characterized by an oxygen index (CI) of higher than 25 vol.%, Providing a fire protection class of at least E60 145, and also giving the laminated glass the ability to withstand the spread of all fire components: flame smoke and combustion products, heat radiation for a given time.

The specified technical result is achieved in that the casting composition for fireproof glazing, containing a structure-forming component, a plasticizer, a flame retardant, includes an EPOCH-520 epoxy resin with a hardener triethylenetetramine (TETA) as a structure-forming component; as a plasticizer - tricresyl phosphate (TKF) and a combustion retardant - triphenyl phosphate in the following components, wt.h .:

Epoxy resin Erohu-520 (ED) one hundred triethylenetetramine (THETA) 8-20 tricresyl phosphate (tcf) 35-65 triphenyl phosphate (TFP) 25-40

The claimed casting composition used as a fire-retardant interlayer in fireproof glass is obtained in the following way: triphenyl phosphate, tricresyl phosphate are dissolved in an epoxy resin. All products are homogenized by vigorous stirring for 1 hour. After homogenization, the hardener triethylenetetramine is introduced into the composition, the composition is poured into a double-glazed unit and polymerized layer by layer under the influence of daylight during the day.

Data on the filling composition and the result are summarized in table 1.

Comparative characteristics of casting compositions for fireproof glazing Thanks to the proposed improvement, an increase in the degree of conversion and oxygen index is achieved, as well as a reduction in smoke formation during combustion of the polymerizate of the claimed casting composition. The achieved technical result is ensured by the replacement of structure-forming components, which leads to an increase in the degree of conversion, and hence the yield of carbonized residue, which contributes to an increase in the heat-insulating properties of the glass packet (indicator I). The complex use of triphenylphosphate and tricresylphosphate when mixed with epoxy resin in the casting composition made it possible to obtain a homogeneous solution and also reduce the combustibility of the material, which was reflected in an increase in the oxygen index. Manufactured multilayer translucent building structures with a layer based on the developed casting composition provide a fire protection class of at least E60 145, for the prototype this figure is E60 132.

Table 1 No. Structural Plasticy Retarders Fireproof Features at Components cator burning glass measure Erohu-520 THETA OEUA metazine DMA Tkf TFF DMF KI Degree of conversion Note one 2 3 four 5 6 7 8 9 10 eleven 12 one one hundred fifteen - - - fifty 33 - 28 97% The polymer layer foams, cokes, does not burn in the flame 2 one hundred 8 fifty 33 26 85% The polymer layer foams, cokes, does not burn in the flame, low mechanical strength 3 one hundred 5 - - - fifty 33 - - - not polymerized four one hundred twenty - - - fifty 33 - 27 98% The polymer layer foams, cokes, does not burn in the flame, increased fragility 5 one hundred 22 - - - fifty 33 - - - When curing, defects in appearance 6 one hundred fifteen - - - 35 33 - 25 92% The polymer layer foams, cokes, does not burn in the flame 7 one hundred fifteen - - - 32 66 - twenty - Burns in the air 8 one hundred fifteen - - - 65 33 - 28 86% The polymer layer foams, cokes, does not burn in the flame, increased elasticity, low strength

Continuation of table 1 one 2 four 5 6 7 8 9 10 eleven 12 9 one hundred fifteen - - - 67 33 - - - Sweating TKF, distribution 10 one hundred fifteen - - - fifty 25 - 25 85 The polymer layer foams, cokes, does not burn in the flame eleven one hundred fifteen - - - fifty 22 - twenty - Burns in the air 12 one hundred fifteen fifty 40 27 86 The polymer layer foams, cokes, does not burn in the flame, transparency decreases slightly 13 one hundred fifteen - - - fifty 43 - - When cured, the composition becomes cloudy prototype - - 70 one fifteen 35 - twenty 23.5 76% The flame is off

Claims (1)

A filling composition for fireproof glazing, containing a structure-forming component, a plasticizer, a combustion retardant, characterized in that it includes an EPOCH-520 epoxy resin with a hardener - triethylenetetramine as a structure-forming component, and contains tricresyl phosphate as a plasticizer and the following flame retardant - the content of components, parts by weight:
epoxy resin Erohu-520 one hundred triethylenetetramine 8-20 tricresyl phosphate 35-65 triphenyl phosphate 25-40