X-ray shielding coating

FIELD: roentgen-ray shielding materials.

SUBSTANCE: proposed X-ray shielding coating has sublayer incorporating cured and plasticized epoxy-containing compound and basic elastic X-ray shielding layer also based on epoxy-containing binder; curing agent from group of cold-curing agents; shielding filler in the form of powdered mixture of rare earth element oxides or mixture of rare earth element oxides with antimony oxide (III), or mixture of rare earth element oxides with tungsten or its compounds, proportion of ingredients being as follows, mass percent: binder, 13.3 - 20.8; shielding filler, 78.6 - 86.3; amine curing agent, o.4 - 0.6. In addition, it has solvent which is essentially mixture of acetic esters, aliphatic and aromatic solvents in the amount of 30 - 40 mass percent per every 100 g of basic X-ray shielding material. Shielding filler content of basic polymerized layer ranges between 78.5 and 88.7 mass percent.

EFFECT: enhanced effectiveness of shielding personnel and patients, improved mechanical and adhesive properties of material.

1 cl, 1 tbl, 4 ex

 

The present invention relates to the production of x-ray shielding materials, namely, a polymer of a lead based coatings binders and shielding filler.

The relevance of the problem to be solved based on the acute needs of modern technology in shielding materials to protect personnel operating x-ray equipment and patients from exposure to x-ray radiation (RI).

Known x-ray protection coating representing layered x-ray shielding material containing layers of elastic polymer of a lead-based material binder - dimethylsiloxane rubber with lead filler and woven material, as a catalyst for the elastic layer is taken determinability tin (IV).

X-ray shielding filler comprises a mixture of oxides of rare earths and antimony oxide (patent RF №2156509, IPC 7 G 21 F 1/00, 32 B 5/30, publ. BI No. 26/2000 from 20.09.2000,).

However, this layered x-ray shielding material is not a high x-ray shielding properties and the elasticity that is explained by the presence of tissue layers characterized by a limited amount of elongation under tension. In addition, when using this material as a coating, a need arises p is imeneniya additional adhesive layer to ensure its effectiveness as a solid material.

Known as the closest to the technical essence and the achieved technical result of the claimed x-ray protection coating based binder, hardener, shielding filler, in the initial state which is a polymeric composition based on a silicone rubber (patent RF №2138865, IPC 6 G 21 F 1/10, publ. BI No. 27/99, from 27.09.99 g)containing as a binder dimethylsiloxane rubber, and as a shielding filler is a mixture of oxides of rare earth elements (REE) and antimony oxide (III).

However, the known coating has a relatively low adhesive strength to metal substrates, based on its relatively low quality.

The aim of the invention is to provide a composition and type of mechanically strong elastic x-ray protection coating, effectively protecting staff and patients from exposure to RI.

A new technical result achieved using the proposed coverage is to ensure efficiency intensisty staff and patients by providing shielding composition of the filler and the maximum degree of filling them finished coating with improved mechanical and adhesive properties.

These task and new technical financial p the tat is achieved by in known x-ray protection coating, comprising a binder, a hardener, a shielding filler, in accordance with the proposed technical solution x-ray protection coating consists of a sublayer containing utverjdenie plasticized epoxydodecane connection, and the primary elastic x-ray shielding layer also epoxydodecane binder, hardener from the group of amine hardeners cold curing, screening filler is a powder mixture of oxides of rare earth elements, or mixtures of oxides of rare earth elements oxide antimony (III), or a mixture of oxides of rare earth elements, tungsten or its compounds, with the following prescription content of ingredients, wt.%:

Bindera 13.3-20,8
Shielding filler78,6-86,3
Amine hardener0,4-0,6

and, optionally, a solvent consisting of a mixture of acetic acid esters, aliphatic and aromatic solvents at a rate of 30-40 wt.% for every 100 g of the substance of the primary x-ray shielding layer, the content of the shielding filler in the composition of the cured base layer is in the range of values, wt.%: 78,5 to 88.7.

The entity offers the suggested x-ray protection coating is as follows.

The proposed x-ray protection coating is a multilayer deposited on a metal substrate material, polymerizing at room temperature. Prepared (peeled and fat) surface of the metal substrate is coated with the underlayer consisting of a mixture of epoxidised binder to 75.8% (by weight), the plasticizer is dibutyl phthalate - 15-19%, hardener - polyethylenepolyamine - 9-11%. On the cured underlayer is applied layers of the main elastic x-ray shielding coating layer to a predetermined thickness. This composition is prepared from the following ingredients, wt.%:

Bindera 13.3-20,8
Shielding filler78,6-86,3
Linney hardener0,4-0,6

and optionally, a solvent consisting of a mixture of acetic acid esters, aliphatic and aromatic solvents in the calculation of 30-40 wt.% for every 100 g of the substance of the primary x-ray shielding layer, the content of the shielding filler in the composition is polymerized primary x-ray shielding layer is in the range of values, wt.%: 78,5 to 88.7.

Experiments have shown that when exceeding the maximum of the claimed limits of the ratios of the ingredients of the binder, hardener Il the filler product will not be issued. In batches of samples covering with the content of the binder, curing agent, or filler below the proposed limits of their relationships were not provided the required performance intensisty and mechanical strength. It has been experimentally determined maximum prescription is the content of the filler - 86,3% (by weight)required to ensure the effectiveness of weakening RI (x-rays) while maintaining the required mechanical properties. It was found that the excess of the prescription of the content of the filler is more 86,3% does not provide the coating quality or uniformity of distribution of the filler or strength. X-ray protection coating was applied by a sputtering technique on the metal substrate.

The presence of the original composition of the hardener cold curing allows the process of curing at normal temperature and pressure, which also has a positive effect on the preservation of physical and mechanical performance of the coating.

The solvent gives the opportunity to improve the quality of x-ray protection coating by providing a possible variation to the working value of the initial viscosity of the composition, which ultimately reduces the thickness and raznorodnosti in the finished floor, which determine the quality of the latter.

After curing of the layers rent is insisitng coatings produced the quality control of the coating on the final x-ray shielding cover the requirements of quality standards. It is established that x-ray protection coating containing all the components in the claimed limits of the ratios of the components, characterized by high efficiency protection of personnel and patients from exposure to RI, while ensuring the maximum degree of filling of the finished coating shielding powdered filler and the enhancement of the mechanical and adhesive properties due to the use of this epoxydodecane binder, comprehensive filler, based on a mixture of oxides of rare earth elements and tungsten carbide, as well as hardener cold hardening. When using the inventive x-ray protection coating were provided with the following maximum parameters:

Density, g/cm34,8
Adhesive strength at break, MPa5-6
Mechanical tensile strength, MPa6
Lead equivalent at a coating thickness of 2 mm, mm Pb1,1

These figures are significantly higher than those of the prototype. Thus, using the proposed x-ray protection coating offers better performance intensisty staff and patients by providing stood the and shielding filler and the maximum degree of filling them finished coating, improving the mechanical and adhesion properties of the coating.

The possibility of industrial implementation of the proposed x-ray protection coating supported by the following specific examples.

Example 1. In the laboratory implemented a lead coating. Prepared (peeled and fat) surface of the metal substrate is coated with the underlayer consisting of a mixture of binder - 74,1%(by weight), the plasticizer is dibutyl phthalate or 14.8%, hardener - polyethylenepolyamine - 11,1 then bringing the substrate to working viscosity 25 C in a mixture of solvents: acetone, butyl acetate and xylene.

On the cured underlayer applied layers of the primary x-ray shielding coating material to a predetermined thickness.

The proposed formulation of x-ray protection coating is prepared by mixing a binder - politiaromana.ro rubber SOPS-ZACK - components shielding powdered filler and then bringing the mixture to a viscosity of 25 with VZ-4 in a solvent mixture of acetone, butyl acetate and xylene, in the calculation of the 40 wt.% for every 100 g of the substance of the base layer of a lead coating. To the resulting solution under stirring introduced the hardener in the ratio of ingredients, wt.%:

Polydieneurethane rubber SOPS-ZACK, THE 38 103410-5 18
The polishing powder (Ferropol-ceria solid
the solution of the oxides of rare earth metals), THE 334-9781,6
The polyethylenepolyamine, THE 6-02-594-850,4

The mode of curing each layer for 15-20 minutes, full cure time of the coating 24 hours.

For the manufacture of prototypes x-ray protection coating thickness up to 2.0 mm was deposited by sputtering technique on a metal substrate of aluminum alloy D-16 and St-3 (steel).

To determine other physical-mechanical properties of x-ray protection coating is deposited on the substrate PTFE (to facilitate removal of the film). X-ray shielding properties of the coatings were determined by calculation by Monte Carlo method using the experimental values of density, density - according to GOST 267-63, mechanical properties: tensile strength and elongation at tensile GOST 270-75, the adhesion strength at the margin GOST-69.

Example 2. In the conditions of example 1 is implemented example 2, with the following ratios prescription ingredients of a lead coating, wt.%:

Polydieneurethane rubber SOPS-ZACK13,3
The filler is a mixture of powders fluorinated oxide is in
rare earths and tungsten carbide
when the ratio by weight 45:5586,3
The polyethylenepolyamine0,4

Example 3. In the conditions of example 1 is implemented example 3, with the following ratios prescription ingredients of a lead coating, wt.%:

Polydieneurethane rubber SOPS-ZACK19,7
The epoxy resin ED-201,0
The filler is a mixture of powders of oxides of rare-earth
elements and oxide of antimony (III) if ratio
weight 50:5078,7
The polyethylenepolyamine0,6

Example 4. In the conditions of example 1 is implemented example 4, with the following ratios prescription ingredients of a lead coating, wt.%:

The polyethylenepolyamine
Polydieneurethane rubber SOPS-ZACK16,5
The epoxy resin ED-200,8
The filler is a mixture of powders of oxide gadolinium (GD-6)
and oxide of antimony (III) at a ratio by weight of 60:4082,1
0,6

Data for examples 1-4 and characteristics of the samples x-ray shielding cover and the prototype shown in the table.

As the experiments showed, the use of the proposed x-ray protection coating provides high performance intensisty staff and patients by providing shielding composition of the filler and the maximum degree of filling them ready coverage while improving the mechanical and adhesive properties.

X-ray protection coating containing a binder, a hardener, a shielding filler, characterized in that the x-ray protection coating consists of a sublayer containing utverjdenie plasticized epoxydodecane connection, and the primary elastic x-ray shielding layer also epoxydodecane binder, hardener from the group of amine hardeners cold curing, screening filler is a powder mixture of oxides of rare earth elements, or mixtures of oxides of rare earth elements oxide antimony (III), or a mixture of oxides of rare earth elements, tungsten or compounds with the following prescription content of ingredients, wt.%: connecting a 13.3-20,8, shielding filler 78,6-86,3 amine hardener of 0.4-0.6, and optionally a solvent, consisting of a mixture of acetic acid esters, aliphatic and aromatic solvents at a rate of 30-40 wt.% for every 100 g of the substance of the primary x-ray shielding layer, the content of the shielding filler in the composition of the cured base layer makes 78.5 to 88.7 wt.%.



 

Same patents:

FIELD: manufacture of roentgen-ray shielding materials.

SUBSTANCE: proposed method includes joining of material layers and curing to produce stack of woven and X-ray shielding material layers by mixing ingredients of cold-hardening X-ray shielding composition. X-ray shielding composition incorporates silicone rubber as binder, shielding filler made of oxide of rare-earth elements mixed up with antimony oxide (III), catalyst, polyamine, and modifying agent, proportion of ingredients per every 100 parts by weight of silicone binder being as follows: epoxy-containing hydrocarbon, 5.0 - 15.0; ortho-phthalate and monatomic alcohols, 0.5 - 3.0; rare-earth element oxides, 160 - 180; antimony oxide (III), 200 - 210; catalyst, 6.0 - 8.0; polyamine, 0.6 - 3.0. Prior to producing stack of fabric layers material is impregnated with organic solution of organometallic compound out of group of organic tin salts. X-ray shielding composition is prepared by sequential mixing up of silicone binder with modifying agent, then catalyst and hardener, followed by their mixing with filler to obtain viscous paste, then catalyst and curing agent (polyamine) which are added to viscous paste just prior to applying the latter to finished woven material. Stack obtained is subjected to compression molding and hardening.

EFFECT: facilitated manufacture.

1 cl, 1 tbl, 1 ex

FIELD: shielding against ionizing rays.

SUBSTANCE: proposed material has sublayer in the form of polybutyl titanate solution or solution of heteroorganic compounds and coating layer of material using silicone polymer as matrix. Coating layer also uses powders of heavy metals, their oxides and carbides as inorganic filler, and cross-linking agent based on mixture of orthosilicic acid ether and products of its hydrolysis. In addition, it has process cross-linking agent in the form of amorphous pyrogenetic silicon dioxide, and curing agent in the form of tin diethyl dicaprylate or catalyst in the form of amino silane solution in orthosilicic acid. Coating layer has following proportion of ingredients, mass percent: silicone polymer, 8.2 - 37.1; heavy-metal powders, their oxides and carbides, 60.7 - 92.0; cross-linking agent, 0.2 - 0.5; process cross-linking agent, 0.2 - 0.5.

EFFECT: enhanced physical, mechanical, and shielding properties of material.

1 cl, 1 dwg, 1 tbl

The invention relates to the protection from radiation, and more specifically to a material for protection against radiation, which is intended for use in medicine, at work, at home, as well as to ensure electromagnetic compatibility of radio equipment and devices

The invention relates to the nuclear industry, in particular for the manufacture of radiation-protective containers KT intended for storage and transport of radioactive sources

FIELD: structural materials for airspace industry.

SUBSTANCE: claimed prepreg contains 24-50 mass % of polymer binder and 50-76 mass % of fibrous filler. As fibrous filler carbon, organic, glass bundles, fabrics and strips are used. Polymer binder contains (mass pts): N,N,N'N'-tentraglycidyldiamino-3,3'-dichlorodiphenyl methane as epoxy oligomere 100; 4,4'-diaminediphenyl sulfone as curing agent 44; fullerene C2n, wherein n >= 30, 0.01-1.0; opened carbon nanotubes 0.1-1.5; fulleroidal multilayered nanomodifier 0.5-10, and fullerene amino derivative of general formula C60(GA)6. Said amino derivative represents reaction product of fullerene C60 with hepthylamine (GA). Article from prepreg is obtained by extrusion.

EFFECT: prepreg with decreased flowability and gel-forming time; composites of increased degradation energy and rest compressive strength.

3 tbl, 9 ex

FIELD: production of laminated plastic used for manufacture of articles of machine-building and aircraft industries, including the manufacture of loose-running blades.

SUBSTANCE: the method consists in the fact that the carbon fibrous filler is impregnated by an epoxy binder and a prepreg is obtained. Then the prepregs are stacked and molded. At stacking a thermoplastic polyamide or polysulfonic film at the rate of 1-10 percent by mass by 100 percent by mass of the binder is placed between the layers of prepregs. The surface energy of the thermoplastic film makes up at least 50 mJ/sq.m.

EFFECT: enhanced resistance to impact loads and enhanced level of preservation of residual strength at a compression after an impact.

1 tbl, 5 ex

FIELD: production of binders for prepregs for making heavily-loaded articles used in aeronautical engineering and intended for operation under high humidity conditions (tropics, marine climate); automobile manufacture; shipbuilding and other industries.

SUBSTANCE: proposed binder for prepreg contains the following components, parts by mass: epoxy triphenol resin, 40-60;low-molecular epoxy diane resin, 25-35; high-molecular epoxy diane resin, 3-6; dicyanodiamide, 5.5-7.0 and bis-(N,N'-dimethyl carbamide) of diphenyl methane, 0.05-2.0; solvent, 0-90; silicon dioxide, 1-6. Prepreg contains also 30-42 mass-% of epoxy binder and 58-70 mass-% of fibrous filler. Articles are made from prepreg by molding.

EFFECT: increased gelatinization time; improved quality of prepreg; enhanced strength characteristics.

3 tbl, 6 ex

The invention relates to rapid curing resin compositions under the influence of the energy of the radiation used for products with thick walls

The invention relates to the production of structural anti-friction materials and products and can be used to create high-load bearing bearings and for other purposes

The invention relates to the production of organo - and fiberglass to protect against thermal factors defeat an open flame and intense heat fluxes and can be used in the construction, automotive, chemical engineering, etc

FIELD: production of binders for prepregs for making heavily-loaded articles used in aeronautical engineering and intended for operation under high humidity conditions (tropics, marine climate); automobile manufacture; shipbuilding and other industries.

SUBSTANCE: proposed binder for prepreg contains the following components, parts by mass: epoxy triphenol resin, 40-60;low-molecular epoxy diane resin, 25-35; high-molecular epoxy diane resin, 3-6; dicyanodiamide, 5.5-7.0 and bis-(N,N'-dimethyl carbamide) of diphenyl methane, 0.05-2.0; solvent, 0-90; silicon dioxide, 1-6. Prepreg contains also 30-42 mass-% of epoxy binder and 58-70 mass-% of fibrous filler. Articles are made from prepreg by molding.

EFFECT: increased gelatinization time; improved quality of prepreg; enhanced strength characteristics.

3 tbl, 6 ex

FIELD: production of laminated plastic used for manufacture of articles of machine-building and aircraft industries, including the manufacture of loose-running blades.

SUBSTANCE: the method consists in the fact that the carbon fibrous filler is impregnated by an epoxy binder and a prepreg is obtained. Then the prepregs are stacked and molded. At stacking a thermoplastic polyamide or polysulfonic film at the rate of 1-10 percent by mass by 100 percent by mass of the binder is placed between the layers of prepregs. The surface energy of the thermoplastic film makes up at least 50 mJ/sq.m.

EFFECT: enhanced resistance to impact loads and enhanced level of preservation of residual strength at a compression after an impact.

1 tbl, 5 ex

FIELD: structural materials for airspace industry.

SUBSTANCE: claimed prepreg contains 24-50 mass % of polymer binder and 50-76 mass % of fibrous filler. As fibrous filler carbon, organic, glass bundles, fabrics and strips are used. Polymer binder contains (mass pts): N,N,N'N'-tentraglycidyldiamino-3,3'-dichlorodiphenyl methane as epoxy oligomere 100; 4,4'-diaminediphenyl sulfone as curing agent 44; fullerene C2n, wherein n >= 30, 0.01-1.0; opened carbon nanotubes 0.1-1.5; fulleroidal multilayered nanomodifier 0.5-10, and fullerene amino derivative of general formula C60(GA)6. Said amino derivative represents reaction product of fullerene C60 with hepthylamine (GA). Article from prepreg is obtained by extrusion.

EFFECT: prepreg with decreased flowability and gel-forming time; composites of increased degradation energy and rest compressive strength.

3 tbl, 9 ex

FIELD: roentgen-ray shielding materials.

SUBSTANCE: proposed X-ray shielding coating has sublayer incorporating cured and plasticized epoxy-containing compound and basic elastic X-ray shielding layer also based on epoxy-containing binder; curing agent from group of cold-curing agents; shielding filler in the form of powdered mixture of rare earth element oxides or mixture of rare earth element oxides with antimony oxide (III), or mixture of rare earth element oxides with tungsten or its compounds, proportion of ingredients being as follows, mass percent: binder, 13.3 - 20.8; shielding filler, 78.6 - 86.3; amine curing agent, o.4 - 0.6. In addition, it has solvent which is essentially mixture of acetic esters, aliphatic and aromatic solvents in the amount of 30 - 40 mass percent per every 100 g of basic X-ray shielding material. Shielding filler content of basic polymerized layer ranges between 78.5 and 88.7 mass percent.

EFFECT: enhanced effectiveness of shielding personnel and patients, improved mechanical and adhesive properties of material.

1 cl, 1 tbl, 4 ex

FIELD: chemical industry; aircraft industry; space industry; radioelectronic industry; other industries; production of the epoxy binding agent, the prepreg on its base and the product made out of the prepreg.

SUBSTANCE: the invention is pertaining to production of the epoxy binding agent, the prepreg on its base and the product made out of the prepreg, which may be used as the construction material in the aircraft industry, space industry, radio electronics and other industries. The epoxy binding agent also may be used as the basis in production of the glues, the paint-and-lacquer coatings, the potting compounds, the sealing compounds, the gel coatings. The binding agent includes the following ratio of the components (in mass shares): 50.0-100.0 - the multifunctional epoxy resins, 1.5-3.6 - the curing agent and 30.0-50.0 - the product of interaction of the epoxy isopropylidenediphenol pitch or the mixtures of the epoxy isopropylidenediphenol pitches with the compound selected from the group including: the product of the polycondensation of glycols with dimethyl terephthalate, phenol-formaldehyde pitch, butadiene acrylicnitrile caoutchouck or their combination. As the multifunctional epoxy resin the binding agent contains epoxytriphenol or epoxy-novolak resin; as the curing agent - the complex compound of boron trifluoride with benzylamine. In addition the binding agent contains the organic solvent. The prepreg includes the following ratio of the components (in mass %): 30.0-50.0 - of the above indicated epoxy binding agent and 50.0-70.0 - of the fibrillar filler. The product is produced by forming of the prepreg. The invention allows to create the binding agent, which has the high level and stability of the adhesion power to the filler, the low value of the internal stresses of the polymeric composite material at the cyclic action of the water-drying process at the temperature of 70°С, to increase the strength of the products at the action of the operational factors.

EFFECT: the invention ensures creation of the binding agent obtaining the high level and stability of the adhesion to the filler, the low value of the internal stresses of the polymeric composite material at the cyclic action of the water-drying process at the rather high temperature, to increase the strength of the products at the action of the operational factors.

5 cl, 3 tbl, 7 ex

Up!