Crosslinked polyvinyl chloride material and preparation method thereof

A technology of cross-linked polyvinyl chloride and cross-linking agent, which is applied in the field of cross-linked PVC materials and its preparation, can solve the problems of poor heat resistance of PVC materials, achieve obvious heat resistance, accelerate cross-linking rate, and improve efficiency Effect

Inactive Publication Date: 2020-11-13
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is to provide a high cross-linking degree PVC material and its preparation method for the problem of poor heat resistance of PVC materials

Method used

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  • Crosslinked polyvinyl chloride material and preparation method thereof
  • Crosslinked polyvinyl chloride material and preparation method thereof
  • Crosslinked polyvinyl chloride material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment proposes a cross-linked PVC material, and its raw material formula weight components are as follows:

[0027]

[0028] The degree of polymerization of the PVC resin is 1,000. The crosslinking agent is triazole dimercaptoammonium salt (FSH). The acid absorbent is magnesium oxide. The stabilizer is a calcium zinc stabilizer. The plasticizer is dioctyl phthalate. The lubricant is stearic acid.

[0029] The preparation method of the cross-linked PVC material described in this embodiment includes the following steps:

[0030] (1) Weigh various raw materials according to the formula and put them into a high-speed mixer for high-speed mixing to make them evenly mixed, and the time is 10 minutes to prepare a mixture.

[0031] (2) Melt and blend the mixture in a two-roll plastic mill, the temperature of the front roll is 150°C, the temperature of the back roll is 155°C, the plasticizing time is 3min, and then the sheet is discharged.

[0032] (3) The temperature of th...

Embodiment 2

[0036] This embodiment proposes a cross-linked PVC material, and its raw material formula weight components are as follows:

[0037]

[0038]

[0039] The degree of polymerization of the PVC resin is 800. The crosslinking agent is 2-n-butylamine-4,6-dimercapto-s-triazine (DB). The acid absorbent is barium oxide. The stabilizer is lead stearate. The plasticizer is epoxy soybean oil. The lubricant is paraffin wax.

[0040] The preparation method of the cross-linked PVC material described in this embodiment includes the following steps:

[0041] (1) Weigh all the raw materials according to the formula and put them in a high-speed mixer for high-speed mixing to make them evenly mixed. The time is 15 minutes to prepare a mixture.

[0042] (2) Melt and blend the mixture in a two-roll plastic mill, the temperature of the front roll is 155°C, the temperature of the back roll is 160°C, the plasticizing time is 3min, and then the sheet is discharged.

[0043] (3) The temperature of the plate...

Embodiment 3

[0047] This embodiment proposes a cross-linked PVC material, and its raw material formula weight components are as follows:

[0048]

[0049] The degree of polymerization of the PVC resin is 1,000. The crosslinking agent is triazole dimercaptoammonium salt (FSH). The acid absorbent is magnesium oxide. The stabilizer is a rare earth stabilizer. The plasticizer is dioctyl phthalate. The lubricant is stearic acid.

[0050] The preparation method of the cross-linked PVC material described in this embodiment includes the following steps:

[0051] (1) Weigh all the raw materials according to the formula and put them into a high-speed mixer for high-speed mixing to make them evenly mixed. The time is 12 minutes to prepare a mixture.

[0052] (2) Melt and blend the mixture in a two-roll plastic mill, the temperature of the front roll is 160°C, the temperature of the back roll is 165°C, the plasticizing time is 3min, and then the sheet is discharged.

[0053] (3) The temperature of the plat...

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Abstract

The invention discloses a crosslinked polyvinyl chloride material and a preparation method thereof. The crosslinked PVC material is prepared from the following raw materials in parts by weight: 100 parts of PVC, 1-3 parts of a crosslinking agent, 5-20 parts of an acid acceptor, 2-5 parts of a stabilizer, 5-45 parts of a plasticizer and 0.2-1.5 parts of a lubricant. The preparation method comprisesthe following steps: putting the materials into a high-speed stirrer, stirring at a high speed for 10-15 minutes to uniformly mix all materials, carrying out melt blending on the mixture in a double-roller plastic mixing mill, discharging sheets, carrying out vulcanization molding in a press vulcanizer, transferring into a plate cold press, shaping, and finally cutting as required. By using the novel cross-linking agent, the cross-linking rate can be increased, the cross-linking degree can be improved, high cross-linking density can be achieved in a short time, time can be saved, and the efficiency can be improved. The obtained material is excellent in mechanical property, the heat resistance is obviously improved, and the use requirements of various materials can be met at a high temperature.

Description

Technical field [0001] The invention relates to the processing and application fields of polyvinyl chloride (PVC), in particular to a cross-linked PVC material and a preparation method thereof. Background technique [0002] PVC is currently one of the thermoplastic plastics with the largest output in the world. Due to its excellent performance and low price, it is widely used in pipes, plates, films, insulating materials, etc. However, due to the low softening temperature and poor heat deformation performance of PVC, the application range of PVC is limited. In order to further expand the application of PVC in engineering materials, people have adopted various methods to modify it. Union is one of the important methods. [0003] The invention provides a method for preparing a PVC material with a high degree of crosslinking. Using the method of compression molding, the PVC and the crosslinking agent and other additives are mixed uniformly, plasticized on the mixing equipment, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K5/378C08J3/24
CPCC08J3/24C08J2327/06C08K5/378
Inventor 邬素华原茹凯
Owner TIANJIN UNIV OF SCI & TECH
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