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Method for preparing modified phenolic resin for coating with cresol residue

A phenolic resin and residue technology, used in polyester coatings, epoxy resin coatings, coatings, etc., can solve the problems of toxic and harmful substances discharge, failure to achieve zero pollution discharge, increase in pollution treatment costs, etc., and achieve good adhesion. , strong practicability, and the effect of solving the problem of cresol pollution

Inactive Publication Date: 2012-06-20
LANZHOU PETROCHEM COLLEGE OF VOCATIONAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods can only reduce the content of harmful substances in cresol residues to a certain extent, but they are not thorough, and there are still a large amount of toxic and harmful substances discharged into nature, which cannot achieve zero pollution discharge, and also complicates the entire treatment process. Large, which greatly increases the cost of pollution treatment of enterprises

Method used

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  • Method for preparing modified phenolic resin for coating with cresol residue
  • Method for preparing modified phenolic resin for coating with cresol residue
  • Method for preparing modified phenolic resin for coating with cresol residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1, the preparation of modified phenolic resin

[0040] (1) Accurately weigh 100 parts of cresol residue, 200 parts of rosin, 20 parts of water, CuSO 4 Add 0.3 parts and 0.5 parts of hexamethylenetetramine into the reaction kettle and raise the temperature. When the system reaches 90°C, add 50 parts of formaldehyde dropwise; after dropping, keep at this temperature for 3 hours to make it fully react; then Add 25 parts of pentaerythritol, continue to heat up, keep at 180-200°C for 2 hours, and start measuring acid value, oil solubility and solubility after keeping at 270°C for 2 hours, when the acid value is ≤20mgKOH / g, resin: linseed oil=1 :4, fully soluble, resin:toluene=1:1, fully soluble, qualified. Start to discharge, dry, and crush to obtain hard resin, which is set aside.

[0041](2) Put 300 parts of the above-mentioned hard resin, 100 parts of soy oil, 45 parts of pentaerythritol, 40 parts of phthalic anhydride, 0.2 parts of silicone oil, and 20 parts...

Embodiment 2

[0044] Embodiment 2, the preparation of modified phenolic resin

[0045] (1) Accurately weigh 100 parts of cresol residue, 50 parts of rosin, 100 parts of petroleum resin, 50 parts of water, 1 part of zinc acetate, and 1 part of ammonia water, add them to the reaction kettle, and raise the temperature. When the system reaches 90 °C, add dropwise 50 parts of formaldehyde; after dripping, keep it at this temperature for 5 hours to make it fully react; detect resin oil solubility and solubility (resin: linseed oil=1: 4, completely dissolved; resin: toluene=1: 1, completely dissolving), complete dissolution is qualified, discharge, dry, crush to obtain hard resin, set aside.

[0046] (2) 250 parts of the above-mentioned hard resin, 100 parts of linseed oil, and 45 parts of pentaerythritol are heated up to 240 ° C, and after keeping for 2 hours, the alcohol solubility is detected. When resin: ethanol (95%) ≥ 1: 5 is qualified, then cool down to At 200°C, add 60 parts of phthalic a...

Embodiment 3

[0049] Embodiment 3, the preparation of modified phenolic resin

[0050] (1) Accurately weigh 100 parts of cresol residue, 50 parts of rosin, 200 parts of coumarone resin, 50 parts of water, 1 part of zinc oxide, and 1 part of ammonia water, add them to the reaction kettle, and raise the temperature. When the system reaches 90 ° C, Add 50 parts of formaldehyde dropwise; after dropping, keep at this temperature for 5 hours to make it react fully; after the test is qualified (detect oil solubility and solubility, resin: linseed oil=1: 4, fully soluble; resin: toluene= 1:1, fully soluble), discharging, drying, crushing to obtain hard resin, set aside;

[0051] (2) 350 parts of the above-mentioned hard resin, 200 parts of soybean oil, and 60 parts of pentaerythritol are heated up to 240 ° C, and after keeping for 2 hours, the alcohol solubility is detected. When the resin: ethanol (95%) ≥ 1: 5, it is qualified, and then cooled to 200 ° C. ℃, add 50 parts of phthalic anhydride, 10...

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Abstract

The invention provides a method for preparing modified phenolic resin for coating with cresol residue, belonging to the technical field of treatment and comprehensive use of cresol residues. The method uses effective functional groups of each compound in the cresol residue to prepare the cresol residue into modified phenolic resin which can be industrially prepared through a serial of chemical reactions. The modified phenolic resin can be directly used for preparing the corresponding coating so as to realize the zero waste exhaust in the production of the cresol, thereby fundamentally solvingthe pollution problem of the cresol, achieving the purpose of comprehensive treatment and changing waste into valuable; and simultaneously, the quality of the prepared coating product is better than the traditional industry standard, but the production cost is lower than that of the existing corresponding product. The method is simple in production technique, little in device investment, strong in enablement, low in comprehensive cost, and obvious in economical benefit.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to the treatment and comprehensive utilization of phenolic residues, in particular to a method for preparing modified phenolic resins using cresol residues as raw materials; the invention also relates to the use of modified phenolic resins in the production of coatings Applications. Background technique [0002] Cresol, also known as coal phenol, is a colorless crystal with a melting point of 30.9°C. It has a phenol odor and is flammable. It is a general name for the mixture of three isomers of o-cresol, m-cresol, and p-cresol. Similarly, it is widely used in the fields of medicine, sanitation, pesticides, spices, dyes, antioxidants, polymerization inhibitors, plasticizers, ultraviolet absorbers, surfactants, coatings, adhesives and synthetic resins. fine chemical products. [0003] With the development of technology, the expansion of cresol and its derivatives and downstre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/28C08G8/32C08G8/34C08G8/30C08G8/08C09D161/14C09D7/12C09D167/08C09D163/00
Inventor 吕维华伍家卫唐蓉萍索陇宁杨兴锴吕江平吴海霞王有朋陈淑芬杨智王雪香
Owner LANZHOU PETROCHEM COLLEGE OF VOCATIONAL TECH
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