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PVC neutron shielding material and preparation method thereof

A technology of shielding materials and neutrons, applied in the field of plastic materials, can solve problems such as tensile strength, bending strength, notched impact strength and oxygen index that are not greatly improved

Active Publication Date: 2014-10-01
河北凯成包装股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] This application aims at the technical problem that the tensile strength, bending strength, notched impact strength and oxygen index of the existing PVC shielding materials have not been greatly improved, and provides a neutron shielding material using PVC and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 100 parts of PVC, 3 parts of epoxy soybean oil, 1 part of calcium stearate, 2.5 parts of dibutyltin maleate, 50 parts of boron carbide, 15 parts of UV-9, 1 part of barium stearate parts, 1.5 parts of magnesium stearate, 0.1 part of diphenyl sulfone, 20 parts of MBS, 5 parts of dibasic lead phosphite, 2 parts of titanium dioxide, 0.5 parts of polypropylene glycol, 20 parts of DBP, weigh PVC, Mix epoxidized soybean oil, boron carbide, UV-9, magnesium stearate and diphenyl sulfone evenly, heat up to 90°C, add MBS, titanium dioxide, polypropylene glycol and dibutyltin maleate in turn, stir for 10min, and heat up to 110°C Add the remaining raw materials at ℃, stir evenly, mix the above-mentioned uniformly stirred raw materials on a two-roller car for 8 minutes, the mixing temperature is 140 °C, after mixing, pull and cut into pellets, and press the sheets on a laminator for 10 minutes, the pressing temperature 80°C, pressure 5MPa, just after cooling.

[0023] The impa...

Embodiment 2

[0025] Weigh 100 parts of PVC, 7 parts of epoxy soybean oil, 3 parts of calcium stearate, 5.5 parts of dibutyltin maleate, 70 parts of boron carbide, 25 parts of UV-9, 2 parts of barium stearate according to the ratio of parts by weight. 3.5 parts of magnesium stearate, 1 part of diphenyl sulfone, 40 parts of MBS, 15 parts of dibasic lead phosphite, 6 parts of titanium dioxide, 1.5 parts of polypropylene glycol, 30 parts of DBP, and weigh PVC, Epoxy soybean oil, boron carbide, UV-9, magnesium stearate and diphenyl sulfone were mixed evenly, and the temperature was raised to 90°C, followed by adding MBS, titanium dioxide, polypropylene glycol and dibutyltin maleate, stirred for 30min, and the temperature was raised to 130°C Add the remaining raw materials at ℃, stir evenly, mix the above-mentioned uniformly stirred raw materials on a two-roller car for 10 minutes, and the mixing temperature is 160 ° C. 80°C, pressure 15MPa, just after cooling.

[0026] The impact strength of t...

Embodiment 3

[0028] Weigh 100 parts of PVC, 4 parts of epoxy soybean oil, 1.5 parts of calcium stearate, 3.5 parts of dibutyltin maleate, 55 parts of boron carbide, 18 parts of UV-9, and 1.3 parts of barium stearate according to the weight ratio. 2 parts, 2 parts of magnesium stearate, 0.2 part of diphenyl sulfone, 25 parts of MBS, 7 parts of dibasic lead phosphite, 3 parts of titanium dioxide, 0.8 part of polypropylene glycol, 22 parts of DOP, weigh PVC, Mix epoxidized soybean oil, boron carbide, UV-9, magnesium stearate and diphenyl sulfone evenly, heat up to 90°C, add MBS, titanium dioxide, polypropylene glycol and dibutyltin maleate in turn, stir for 15min, and heat up to 115°C Add the remaining raw materials at ℃, stir evenly, mix the above-mentioned uniformly stirred raw materials on a two-roller car for 9 minutes, and the mixing temperature is 145 ° C. 80°C, pressure 8MPa, just after cooling.

[0029]The impact strength of the product is 8MPa, the oxygen index is 35%; the bending s...

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Abstract

The invention discloses a PVC neutron shielding material and a preparation method thereof. The method comprises the following steps: weighing PVC, epoxidized soybean oil, calcium stearate, dibutyltin maleate, boron carbide, UV-9, barium stearate, magnesium stearate, diphenyl sulfone, MBS, a heat stabilizer, titanium dioxide, polypropylene glycol and a plasticizer, mixing the raw materials, and carrying out mixed refining, piece pulling, sized dicing, pressing and cooling off, wherein the product impact strength is 5 to 10 MPa, the oxygen index is 35%, the bending strength is 15 to 25 MPa, the tensile strength is 15 to 35 MPa, and the Vicat heat-resisting temperature is 60 to 70 DEG C. The PVC neutron shielding material and the preparation method can be used for wide production and unceasingly replacement of the conventional materials.

Description

technical field [0001] The invention relates to a neutron shielding material, in particular to a PVC neutron shielding material and a preparation method thereof, belonging to the technical field of plastic materials. Background technique [0002] PVC is a thermoplastic resin polymerized by vinyl chloride under the action of an initiator. It is a homopolymer of vinyl chloride. Vinyl chloride homopolymers and vinyl chloride copolymers are collectively referred to as vinyl chloride resins. PVC is a white powder with an amorphous structure and a small degree of branching. The molecular weight of industrially produced PVC is generally in the range of 50,000 to 120,000, with a large polydispersity, and the molecular weight increases with the decrease of the polymerization temperature; there is no fixed melting point, it starts to soften at 80-85°C, and becomes viscoelastic at 130°C , 160 ~ 180 ℃ began to change into a viscous flow state; good mechanical properties, tensile stre...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L51/04C08K13/02C08K5/1515C08K5/098C08K5/57C08K3/38C08K3/22G21F1/12B32B27/06
Inventor 应璐
Owner 河北凯成包装股份有限公司
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