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Flexible pipe material for temperature resistant and thermoplastic elastomer and preparation method thereof

A thermoplastic elastomer and polyolefin elastomer technology, used in hoses, pipes, machinery and equipment, etc., can solve the problems of complex process, high cost and high material cost, and achieve perfect chemical cross-linking structure, good aging resistance and weather resistance. , good mechanical properties

Inactive Publication Date: 2012-11-21
SHANGHAI RIJIE ELASTOMER PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 2. Using dynamic vulcanized EPDM+PP TPV material to produce hoses can reduce water pipe leakage and rupture, but the material cost is relatively high
[0008] 3. The use of high molecular weight SEBS material to produce hoses has a certain effect on reducing leakage, but the hot water resistance cannot be stable for a long time and is not ideal.
[0009] The above methods have disadvantages such as complicated process, high cost and unstable effect.

Method used

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  • Flexible pipe material for temperature resistant and thermoplastic elastomer and preparation method thereof
  • Flexible pipe material for temperature resistant and thermoplastic elastomer and preparation method thereof
  • Flexible pipe material for temperature resistant and thermoplastic elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The POE and EPDM with different mass ratios were weighed according to the formula in Table 1, and the PP, DCP, TAIC with the same mass ratio were also weighed according to the formula in Table 1. According to the formula in Table 1, add POE and EPDM in different proportions into a low-speed mixer and stir evenly at normal temperature and pressure, and then add into a twin-screw extruder for blending, extrusion and granulation. Add the blended material into a low-speed mixer, add the cross-linking agent DCP and the auxiliary cross-linking agent TAIC while stirring, and the cross-linking agent has been completely absorbed and uniform. The mixed material is added to the twin-screw extruder, and the dynamic vulcanization reaction is carried out to extrude and granulate to obtain the dynamic vulcanization master batch. The dynamic vulcanization masterbatch is naturally placed at room temperature for 24 hours, then baked in a vacuum oven for 2 hours, and then taken out and pl...

Embodiment 2

[0054] The POE, EPDM, PP, TAIC of the same mass ratio were weighed according to the formula in Table 2, and the DCP of different mass ratios was also weighed according to the formula in Table 2. According to Table 2, the formulations with different numbers are combined into dynamic vulcanization master batches, respectively, to obtain dynamic vulcanization master batches from No. 1 to No. 6 formulations in Table 2. Then, the No. 1 to No. 6 masterbatches were injection-molded into standard test samples by an injection molding machine, and tested according to the test standards in Table 2. The test results are shown in Table 2.

[0055] Table 2.

[0056]

[0057]

[0058] As shown in the results in Table 2, from the comprehensive consideration of mechanical properties and processing technology, formulations No. 3 to No. 4 perform relatively well. For example, in terms of weight percentage, the amount of POE is 45%, EPDM The dosage is 15%, PP is 36.5-37.5%, DCP is 2-3%, T...

Embodiment 3

[0060] The No. 3 formula in Table 1 or the No. 4 formula in Table 2 is made into a dynamic vulcanization master batch, for subsequent use.

[0061] As shown in 6 groups of formulas in Table 3, SEBS, rubber oil, calcium carbonate and the above-mentioned self-made dynamic vulcanization masterbatch with different mass ratios were weighed respectively. Put SEBS into a low-speed mixer, heat and stir at 60-100°C, and add plasticizer rubber oil. After the rubber oil is fully absorbed, add dynamic vulcanization masterbatch and filler material calcium carbonate, and stir evenly. The mixture is then added to a twin-screw extruder for physical blending, extrusion and granulation to obtain a finished thermoplastic elastomer hose material.

[0062] The finished particles of No. 1 to No. 6 were injected into standard test samples by injection molding machine. Injection parameters: temperature 190-210°C, pressure 50-75MPa, mold temperature 50°C. After placing the standard test sample in an ...

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Abstract

The present invention discloses a flexible pipe material for a temperature resistant and thermoplastic elastomer and a preparation method thereof. The material is composed of the following components, by weight percentage: 25-45% of a styrene-butadiene-styrene triblock copolymer, 20-40% of a dynamic vulcanization master batch, 20-40% of a plasticizer, and 15-25% of a filling material. The dynamic vulcanization master batch is composed of the following components, by weight percentage: 35-50% of a polyolefin elastomer, 15-30% of a rubber material, 25-45% of a thermoplastic resin, 1-4% of a crosslinking agent, and 0.2-0.6% of an auxiliary crosslinking agent. The invention also discloses a preparation method of the flexible pipe material for the temperature resistant and thermoplastic elastomer. According to the invention, the polyolefin elastomer is combined with the rubber material, and a chemical crosslinking structure is introduced through dynamic vulcanization, so as to reinforce the styrene-butadiene-styrene triblock copolymer material; and high temperature and hot water resistance of the styrene-butadiene-styrene triblock copolymer material is greatly improved, so as to avoid deformation leakage and rupture for long-time cycle working.

Description

technical field [0001] The present invention relates to a hose material, more particularly, the present invention relates to a hose material of a temperature-resistant thermoplastic elastomer and a preparation method thereof. Background technique [0002] Soft PVC water pipes are often used in daily life and industrial production due to their convenience and low price. However, general-purpose PVC contains heavy metals such as lead salts, and releases toxic gases such as HCL and CL2 during high temperature and combustion. PVC corrodes equipment and molds during production and processing. PVC becomes hard and brittle when the temperature is low in winter. In line with the increasingly strict demands of various countries for environmentally friendly materials, the use of PVC water pipes and other products has been restricted a lot in recent years. [0003] The main composition of TPE material is styrene-butadiene-styrene triblock copolymer, which is a styrene-based thermoplas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08L23/08C08L23/16C08K3/26C08K5/14C08J3/22F16L11/04
Inventor 苏文举
Owner SHANGHAI RIJIE ELASTOMER PLASTIC
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