Double-component peelable cement gum and preparation method thereof

Abstract

The invention provides double-component peelable cement gum, which is composed of a component A and a component B. The component A comprises polyether polyol, isocyanate, surface hydroxyl modified paraffin, a thickener and a solid filler. The component B comprises polyether polyol, a catalyst, a chain extender, surface hydroxyl modified paraffin, a thickener and a solid filler; and the chain extender comprises castor oil. According to the invention, paraffin with hydroxyl on the surface is introduced into two components, so that a product does not stick to hands of operators during kneading; meanwhile, due to the fact that hydroxyl on the surface can react with the isocyanate, the cement gum has good compatibility after being cured, material cracking, pulverization and deformation caused by migration are avoided, meanwhile, the cement gum obtained after curing has good weather resistance in high-temperature, high-humidity, high-salt and other environments, and the cement gum can play arole in protection and plugging for a long time in severe environments. Meanwhile, the chain extender contains a certain amount of castor oil, so that during stripping, the cement gum can be used forforming whole glass and basically has no residue on a protected device.

Description

technical field [0001] The invention belongs to the field of polymer functional materials, and in particular relates to a two-component fast-curing plastic clay and a preparation method thereof. Background technique [0002] In order to prevent electrical equipment, wires, etc. from leaking, they are generally sealed and protected with anti-leakage tape. However, this method cannot isolate electrical equipment from contact with water vapor, and cannot achieve a complete sealing effect. Long-term use has a greater potential safety hazard of short circuit. At the same time, after some equipment, including connectors, wires are oxidized, the resistance increases and the heat generation increases significantly, which affects the service life of cables and wires, and is easy to burn out the wires and cause accidents. [0003] In the prior art, some cement is often used to block and protect electrical equipment and wire joints. Traditionally, red mud is used for dehydration cur...

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the disadvantages of poor toughness, poor plasticity, difficult expansion, and easy pulverization and fragmentation after long-term work, long curing time and complicated steps in application in the prior art, the present invention provides a polyurethane-based Polymer clay, the product is a two-component product, which can be directly kneaded into a suitable shape by hand when using, the curing time is fast, the mechanical properties are good after curing, and the hardness and toughness are satisfactory; corrosion resistance and weather resistance are good ;The adhesion is moderate, and it has good peelability while ensuring the mechanical strength; at the same time, the material has strong cohesion, and can be easily peeled off from the whole of the protected electrical appliance without residue, which is convenient for secondary construction. A new type of polyurethane cement with excellent performance

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