A kind of two-component peelable cement and its preparation method

Abstract

The invention provides a two-component peelable cement, which consists of two components A and B. The A component includes polyether polyol, isocyanate, surface hydroxyl modified paraffin, thickener, and solid filler; the B component includes Polyether polyol, catalyst, chain extender, surface hydroxyl modified paraffin, thickener, solid filler; the chain extender includes castor oil. The present invention introduces paraffin wax with hydroxyl groups on the surface into the two-component, so that the operator will not stick to his hands when kneading; at the same time, because the hydroxyl groups on the surface can react with isocyanate, after curing, it has good compatibility. It is non-toxic, and will not cause dry cracking, pulverization and deformation of the material due to migration. At the same time, the cement obtained after curing has good weather resistance in high temperature, high humidity, high salt and other environments, and can protect it for a long time in harsh environments. blocking effect. At the same time, the chain extender of the present invention contains a certain amount of castor oil, so that when it is peeled off, the cement can be used as a whole glass, and there is basically no residue on the 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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