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 an

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0010] Example 1

[0011] In a glass reaction flask equipped with a stirring and thermocouple, 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, and lead naphthenate were added 5.0 grams. The reaction mixture was heated to 65-95°C, after the paraformaldehyde was dissolved, it was heated to 130°C to react for 60 minutes, and then vacuum dehydrated for 30 minutes, the vacuum degree was 0.095Mpa, and the dehydration temperature was 120°C. Cool the reaction flask 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℃

Example Embodiment

[0012] Example 2

[0013] In a glass reaction flask equipped with a stirring and thermocouple, 282 grams (3 moles) of phenol, 294 grams (9 moles) of paraformaldehyde (content 92%), 288 grams of polypropylene glycol with a molecular weight of 400, and lead naphthenate were added 5.0 grams. The reaction mixture was heated to 65-95°C, after the paraformaldehyde was dissolved, it was heated to 130°C to react for 60 minutes, and then vacuum dehydrated for 30 minutes, the vacuum degree was 0.095Mpa, and the dehydration temperature was 120°C. Cool the reaction flask 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 being placed at room temperature for 3 months, the viscosity is 700mPa.s / 35°C.

Example Embodiment

[0014] Example 3

[0015] In a glass reaction flask equipped with a stirring and 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 reaction mixture is heated to 65~95℃, after the paraformaldehyde is dissolved, the temperature is raised to 130℃ to react for 120 minutes, then 45 grams of polyethylene glycol with a molecular weight of 200 are added, and then vacuum dehydrated for 30 minutes, the vacuum degree is 0.095Mpa, the dehydration temperature is 120 ℃. Cool the reaction flask 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 being placed at room temperature for 3 months, the viscosity is 3000mPa.s / 35°C.

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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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