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Environment-friendly welding rod coating with waterproof and dampproof functions and preparation method thereof

An environmentally friendly, electrode technology, used in welding equipment, welding media, manufacturing tools, etc., can solve problems such as electric welders and environmental health and safety hazards, and achieve improved welding quality, excellent bonding effect, and excellent waterproof and moisture-proof functions. Effect

Inactive Publication Date: 2016-06-15
罗福仲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyvinyl formal glue system acetalizes polyvinyl alcohol, which improves the bonding performance and water resistance to a certain extent, but the unreacted formaldehyde remains in the coating, which is harmful to the health of welders and the environment. and safety hazards

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] Preparation of the binder: The binder is prepared by the following steps: add accurately weighed 2 parts of polyvinyl alcohol particles into a reactor containing 50kg of boiling water and a ribbon mixer, and keep it slightly boiling until completely dissolved ; Add 0.12kg of OP-10 emulsifier to make up the water; cool to a certain temperature, add 0.08kg of toluene diisocyanate dropwise while stirring, crosslinking reaction for 1h; slowly add sodium carboxymethyl cellulose and sodium carboxymethyl starch , And continue to stir for 20 minutes at a rotation speed of 30-40 revolutions / min to prepare the binder.

[0026] Preparation of sodium carboxymethyl cellulose: using solvent method production process, the cellulose raw material is alkalized to generate alkali fiber, and then the cellulose ether is generated by the etherification reaction, and then it is neutralized, washed, raked, dried, and crushed. , Sieving to obtain sodium carboxymethyl cellulose.

[0027] Preparation...

Embodiment

[0028] Example: Environment-friendly electrode coating with waterproof and moisture-proof function and its preparation method, using marble powder, fluorite powder, rutile powder, and ferromanganese powder as the main raw materials to dry and mix uniformly, then wet-mix with a binder and apply When it is formed on the welding core, the environmental protection electrode coating with waterproof and moisture-proof function of the present invention is prepared according to parts by weight using the following formula:

[0029] 95kg of ore powder and ferromanganese powder,

[0030] 2kg of polyvinyl alcohol,

[0031] Toluene diisocyanate 0.08kg,

[0032] OP-10 emulsifier 0.12kg,

[0033] 1.3kg of sodium carboxymethyl cellulose,

[0034] Sodium carboxymethyl starch 0.7kg.

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Abstract

The invention discloses an environment-friendly welding rod coating with waterproof and dampproof functions and a preparation method thereof. The main raw materials including marble powder, fluorite powder, rutile powder and ferromanganese powder are evenly mixed in a dry mode, then mixed with a binding agent in a wet mode and spread on a core wire to be formed. The environment-friendly welding rod coating with the waterproof and dampproof functions is prepared from, by weight, 95 parts of mineral powder and the ferromanganese powder, 2 parts of polyvinyl alcohol, 0.08 part of toluene diisocynate, 0.12 part of an OP-10 emulsifying agent, 1.3 parts of sodium carboxymethylcellulose and 0.7 part of sodium carboxymethyl starch according to the formula. As the polyvinyl alcohol and the toluene diisocynate are adopted to conduct cross-linking reaction, and then serve as the binding agent with the sodium carboxymethylcellulose and the sodium carboxymethyl starch, the binding effect of the prepared waterproof and dampproof coating is better than that of sodium silicate, the coating has the excellent waterproof and dampproof functions, and the welding quality of a welding rod is obviously improved. Meanwhile, the environment-friendly welding rod coating with the waterproof and dampproof functions has no health or safety dangers to an electric welder and the environment and belongs to an environment-friendly product.

Description

Technical field [0001] The invention relates to the technical field of electric welding electrode preparation, in particular to an environmentally-friendly electric welding electrode coating with waterproof and moisture-proof functions and a preparation method thereof. Background technique [0002] Electrode coating is the coating layer on the surface of the welding core, which determines the welding quality of the electrode. Most of the domestic electrode coatings are made of marble powder, fluorite powder, rutile powder, and ferromanganese powder as the main raw materials. After being evenly mixed with water glass, the coating is applied to the welding core to form. Because water glass is used as a binder, it has poor water resistance and no waterproof and moisture-proof function. After a period of storage, the electrode coating can easily absorb moisture in the air and affect the bonding effect, and even cause the coating to fall off. Coatings that do not have the function of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/365B23K35/40
Inventor 罗福仲
Owner 罗福仲
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