Synthesis method of thermosetting phenol-formaldehyde resin in solid at normal temperature

A technology of phenolic resin and synthesis method, applied in the field of resin synthesis, to achieve the effects of high methylol content, long storage period, convenient transportation and use
CN101597364AInactive Publication Date: 2009-12-09SHAANXI NORMAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHAANXI NORMAL UNIV
Publication Date
2009-12-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

A synthesis method of thermosetting phenol-formaldehyde resin in solid at normal temperature comprises mixing, reflux reaction, and vacuum dehydration. The invention adopts phenol or cresol and aldehyde compound as reactant and alkali as catalyst, preparation parameters is regulated and hydroxymethyl generation speed is controlled to avoid excessive hydroxymethyl existing in the reaction system and gel production, and the thermosetting phenol-formaldehyde resin in solid at normal temperature with 0.4-0.6 hydroxymethyl content is prepared. Compared with the prior preparation method of phenol-formaldehyde resin, the invention has the advantages that gel production is difficult in synthesis process, the synthetic thermosetting phenol-formaldehyde resin is high in hydroxymethyl content, low in free phenol content and is solid at normal temperature, and environmental pollution is less, storage period is long, transportation and use are convenient, etc. The method of the invention can be used for synthesizing solid thermosetting phenol-formaldehyde.
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Description

technical field

[0001] The invention relates to a method for synthesizing resin, in particular to a method for synthesizing a thermosetting phenolic resin that is solid at room temperature. Background technique

[0002] Phenolic resin is a synthetic resin obtained by polycondensation of phenols and aldehydes. According to their different process formulas, they are divided into two categories: thermosetting phenolic resins and linear thermoplastic phenolic resins. As the oldest synthetic resin, phenolic resin is widely used because of its high mechanical strength, good heat resistance, flame retardancy, low toxicity and low smoke, and can be blended with other polymers to achieve high performance. Molding compounds, coatings, friction materials, casting resins, adhesives, foamed plastic semiconductor packaging materials, photoresists and other fields. Driven by the rapid development of the global economy, the rapid development of the automotive industry, metallurgy, and ele...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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