Oil-resistant and low temperature-resistant thermoplastic elastomer and production method

Abstract

The invention provides an oil-resistant and low temperature-resistant thermoplastic elastomer and a production method according to the mechanism that the characters of a plurality of molecular materials are similar and compatible, mutually complementary and capable of mutually modifying. The oil-resistant and low temperature-resistant thermoplastic elastomer comprises the following components by weight parts: 100 parts of one or a plurality of polyvinyl chloride X-2000, X-2500, X1300 and X-1000, 40-150 parts of one or a plurality of nitrile butadiene rubber (NBR) N41, N33CM, N33M, N26 and N18,20-50 parts of modifier, 20-160 parts of filling agent, 70-150 parts of plasticizer, 15-75 parts of dynamic cross-linking agent, 0-5 parts of pigments and 8-20 parts of additives. The invention develops the modifier, selects the cross-linking agent and technological conditions of temperature, rotational speed and the like, thereby leading the product to achieve the technical requirements of oil resistance, low temperature resistance, acid-base resistance, aging resistance and smaller specific gravity than a vulcanized product with the same price. The elastomer can not only produce various oil-resistant pipes, ropes, wires and cables as well as sealing strips of aluminum-plastic doors and windows of vehicles, motor vehicles and buildings, but also manufacture various parts and products with different mechanical performance requirements on hardness, elasticity and the like through the different technologies of blow molding, extrusion molding, injection molding and the like.

Description

Technical field [0001] The invention relates to an oil-resistant and low-temperature resistant thermoplastic elastomer, which is particularly suitable for wire and cable insulation and sheathing; sealing strips and seals for automobiles and motor vehicles, aluminum-plastic doors and windows; oil-resistant, low-temperature resistant hoses, rubber ropes, and glue sticks ; Low temperature resistant, oil resistant parts and oil seals formed by injection molding and blow molding belong to the technical field of plastic or rubber materials. Background technique [0002] Polyvinyl chloride (PVC) and nitrile rubber (especially NBR 18 ) Has good compatibility. PVC has strong tensile force and is easy to process; nitrile rubber has excellent oil resistance and low temperature resistance, and the synthesis and blending of the two can achieve good effects of mutual modification and complementary performance. However, its oil resistance and low temperature resistance cannot be significantly ...

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Problems solved by technology

However, the vulcanization process is complicated, the investment and cost are large, the product itself and the production process cause "three wastes" to be discharged, causing serious environmental pollution, and there is no development prospect

According to foreign reports, Japan and other developed countries use VC monomer and NBR monomer to polymerize "rubber-plastic alloy steel", but the equipment investment of enterprises is too large, the product cost is high, and the price is expensive, which is difficult for small and medium-sized enterprises to bear.

Some domestic enterprises try to use internal mixer and twin-screw extruder to dynamically vulcanize 100 parts by weight of PVC resin and more than 40 parts to 100 parts of nitrile rubber to produce PVC / NBR synthetic blended thermoplastic elastomer TPVC. The process conditions and the selected dynamic vulcanizing agent are incorrect and inapplicable, but failed to achieve the expected purpose, and failed to solve the shortcomings and disadvantages of materials and products such as stickiness, poor toughness, low resilience, and large permanent deformation

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