Gasoline-resistant elastic PVC (polyvinyl chloride) material and preparation method and application thereof

A PVC material, gasoline-resistant technology, applied in the polymer field, can solve the problems of loss of use function, the sheath becomes hard and brittle, and the surface of the material changes, and achieves the effects of simple processing, low hardness change, and low raw material cost.

Inactive Publication Date: 2017-03-29
NINGBO TAIYONG AUTOMOTIVE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the oil gun handle sheath is not immersed in gasoline during use, frequent splashing of gasoline will still cause changes in the surface of the material, the sheath will become hard and brittle, and lose its function

Method used

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  • Gasoline-resistant elastic PVC (polyvinyl chloride) material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of in situ PVC resin:

[0033] The in-situ PVC resin was prepared by the following method: 100 parts of VCM, 140 parts of soft water, 8 parts of modified nano-calcium carbonate, 0.5 parts of composite dispersant, 0.8 parts of initiator, and 3 parts of processing aid were mixed and stirred for 25 minutes, and then the temperature was raised To 70 ℃, when the reaction pressure is reduced to 0.2MPa, the reaction is completed, dehydrated and dried to obtain in-situ PVC resin.

[0034] Wherein, the composite dispersant is a compound mixture of methyl cellulose and hydroxyethyl cellulose in a mass ratio of 1:1.5; A mixture of dialkyl esters; the processing aids include antioxidants, heat stabilizers, anti-ultraviolet absorbers and other common processing aids, which are added according to actual processing.

[0035] Among them, in the modified nano-calcium carbonate, particles with a particle size of 20-80nm account for 75%, and particles with a particle size of ...

Embodiment 2

[0037] Preparation of in situ PVC resin:

[0038] The in-situ PVC resin was prepared by the following method: 100 parts of VCM, 130 parts of soft water, 6 parts of modified nano-calcium carbonate, 0.8 parts of composite dispersant, 0.3 parts of initiator, and 2 parts of processing aid were mixed and stirred for 22 minutes, and then the temperature was raised To 75 ℃, when the reaction pressure is reduced to 0.2MPa, the reaction is completed, dehydrated and dried to obtain in-situ PVC resin.

[0039] Wherein, the composite dispersant is a compound mixture of methyl cellulose and hydroxyethyl cellulose in a mass ratio of 1:1.8; A mixture of dialkyl esters; the processing aids include antioxidants, heat stabilizers, anti-ultraviolet absorbers and other common processing aids, which are added according to actual processing.

[0040] Among them, in the modified nano-calcium carbonate, particles with a particle size of 20-80nm account for 80%, and particles with a particle size of 80...

Embodiment 3

[0042] Preparation of in situ PVC resin:

[0043] In-situ PVC resin was prepared by mixing 100 parts of VCM, 145 parts of soft water, 10 parts of modified nano-calcium carbonate, 0.2 parts of composite dispersant, 1.2 parts of initiator, and 4 parts of processing aids and stirring for 28 minutes, then heating up to 65°C, the reaction is completed when the reaction pressure drops to 0.2MPa, and the in-situ PVC resin is obtained by dehydration and drying.

[0044] Wherein, the composite dispersant is a compound mixture of methyl cellulose and hydroxyethyl cellulose in a mass ratio of 1:1.2; The mixture; said processing aids include antioxidants, heat stabilizers, anti-ultraviolet absorbers and other common processing aids, which are added according to actual processing.

[0045] Among them, in the modified nano-calcium carbonate, particles with a particle size of 20-80nm accounted for 78%, and particles with a particle size of 80-100nm accounted for 22%; and the modified nano-c...

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Abstract

The invention relates to a gasoline-resistant elastic PVC (polyvinyl chloride) material and a preparation method and application thereof, and belongs to the technical field of macromolecules. The gasoline-resistant elastic PVC material based on PVC resin is prepared by mixing a composition and extrude-granulating; based on 100 parts by weight of PVC resin powder, the composition comprises 100 parts of in-situ PVC resin having polymerization degree of 800-3000, 20-150 parts of polyester plasticizer having molecular weight of 1000-3000, 5-40 parts of lightweight calcium carbonate, 2-8 parts of a composite stabilizer, and 0.2-2 parts of a lubricant. The gasoline-resistant elastic PVC material has excellent resistance to gasoline corrosion, may soak in gasoline for long time with good surface completion and low hardness variation, is greater than 90% in tensile strength retention rate and greater than 75% in retention rate of tensile elongation at break after being soaked in gasoline at the room temperature of (23+ / -2) DEG C for 30 days, and may serve for oil gun sheaths or other tubing devices.

Description

technical field [0001] The invention relates to a gasoline-resistant elastic PVC material and its preparation method and application, belonging to the technical field of polymers. Background technique [0002] PVC is the English abbreviation of polyvinyl chloride. PVC modified materials are cheap, rich in raw materials, and easy to process. They are widely used in industries such as automobiles, construction, home appliances, and cables. They are currently one of the most produced plastics in the world. [0003] The oil gun handle sheath or some oil pipeline sheaths are generally made of soft elastic materials, because the surface is often impregnated with gasoline, so it must have good gasoline corrosion resistance. Rubber, thermoplastic elastomer and PVC are mostly used in the market Material. [0004] PVC resin is a polyolefin material, which is resistant to oil, acid and alkali, but has a high melting point and is unstable. Generally, it needs to add plasticizers, stabi...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L67/00C08L1/28C08K9/04C08K3/26C08F114/06C08F2/44
CPCC08L27/06C08F2/44C08F114/06C08K2201/003C08K2201/011C08L2205/02C08L2205/035C08L67/00C08L1/28C08L1/284C08K9/04C08K2003/265
Inventor 孙兴好李文斌黄燃
Owner NINGBO TAIYONG AUTOMOTIVE PARTS
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