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New modified phenolic resin and method for producing same

A technology of phenolic resin and production method, which is applied in the field of new modified phenolic resin and its production, and can solve problems such as increased viscosity, inconvenient use and processing, and limited storage life

Inactive Publication Date: 2010-03-24
SHANGHAI HAOHAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this kind of resin has several disadvantages: the viscosity of the first resin is high, generally greater than 10000mPa.s under normal temperature conditions, and it is inconvenient to use and process; the storage life of the second resin is limited, the resin is prone to self-polymerization, and the viscosity increases until it is cured; The third resin is more brittle after curing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] In a glass reaction flask equipped with stirring and a thermocouple, add 282 grams (3 moles) of phenol, 98 grams (3 moles) of paraformaldehyde (content 92%), 19 grams of polypropylene glycol with a molecular weight of 400, lead naphthenate 5.0 grams. The temperature of the reaction mixture is raised to 65-95°C. After the paraformaldehyde is dissolved, the temperature is raised to 130°C for 60 minutes, and then the vacuum dehydration is carried out for 30 minutes. The vacuum degree is 0.095Mpa, and the dehydration temperature is 120°C. Cool the reaction bottle until the temperature drops to 70°C and discharge. After testing, the water content is 0.6%, and the viscosity is 8800mPa.s / 35°C. After 3 months at room temperature, the viscosity is 9500mPa.s / 35℃

Embodiment 2

[0013] In a glass reaction flask equipped with stirring and thermocouple, add 282 grams (3 moles) of phenol, 294 grams (9 moles) of paraformaldehyde (content 92%), 288 grams of polypropylene glycol of molecular weight 400, lead naphthenate 5.0 grams. The temperature of the reaction mixture is raised to 65-95°C. After the paraformaldehyde is dissolved, the temperature is raised to 130°C for 60 minutes, and then the vacuum dehydration is carried out for 30 minutes. The vacuum degree is 0.095Mpa, and the dehydration temperature is 120°C. Cool the reaction bottle until the temperature drops to 70°C and discharge. After testing, the water content is 0.8%, and the viscosity is 600mPa.s / 35°C. After standing at room temperature for 3 months, the viscosity is 700mPa.s / 35℃.

Embodiment 3

[0015] In a glass reaction flask equipped with stirring and a thermocouple, 282 grams (3 moles) of phenol, 196 grams (6 moles) of paraformaldehyde (content 92%), and 5.0 grams of lead naphthenate were added. The temperature of the reaction mixture is raised to 65-95°C. After the paraformaldehyde is dissolved, the temperature is raised to 130°C for 120 minutes, and then 45 grams of polyethylene glycol with a molecular weight of 200 is added, followed by vacuum dehydration for 30 minutes, the vacuum degree is 0.095Mpa, and the dehydration temperature is 120 ℃. Cool the reaction bottle until the temperature drops to 70°C and discharge. After testing, the water content is 0.4%, and the viscosity is 2500mPa.s / 35°C. After standing at room temperature for 3 months, the viscosity is 3000mPa.s / 35℃.

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PUM

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Abstract

The invention discloses a new modified phenolic resin and method for producing the same. An amount of polyether polyalcohol is added in the process of synthesizing a thermosetting phenolic resin at the molar ratio of formaldehyde to phenol being not less than 1 to obtain a polyalcohol-modified phenolic resin. The invention relates to a chemical modification for phenolic resin. The resin has lowerviscosity at the room temperature and good standing stability.

Description

technical field [0001] The invention relates to a novel modified phenolic resin and a production method thereof. Background technique [0002] Phenolic resin is an ancient variety of polymer materials. Its commercial production began in 1905 and has a history of more than one hundred years. Because phenolic resin is cheap, the manufacturing process is relatively simple, and it has excellent properties such as high temperature resistance and good flame retardancy, it has been widely developed in the fields of foam plastics, coatings, and adhesives. Phenolic resins usually include thermoplastic phenolic resin Novolak type, thermosetting phenolic resin Resol type, high ortho phenolic resin and other types. Among them, the high ortho Resol type phenolic resin is an important type of phenolic resin. The resin has the characteristics of high reactivity and high solid content, and is especially suitable for preparing high-performance materials such as phenolic foam plastics, poly...

Claims

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Application Information

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IPC IPC(8): C08G8/28
Inventor 刘远中陈士景徐强
Owner SHANGHAI HAOHAI CHEM
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