Phenol-formaldehyde resin and preparation method thereof

A technology of phenolic resin and bisphenol, applied in the field of phenolic resin and its preparation, can solve the problems of low odor, large residual odor and high formaldehyde content, and achieve the effects of low odor, excellent use environment and low free formaldehyde

Active Publication Date: 2017-01-11
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem of large odor residues in impregnated resins in the prior art, especially high formaldehyde content, this application provides a phenolic resin with significantly reduced residual small molecular substances after curing, lower odor, and more environmentally friendly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Mix 100g of bisphenol A, 25g of formaldehyde (37% aqueous solution) (bisphenol A:formaldehyde molar ratio 1:0.704) with 10g of water, add 35g of sodium hydroxide, and react at a constant temperature of 120°C for 4 hours under a pressure of 1.0MPa , Get the intermediate;

[0033] Then the intermediate was mixed with 200g glyoxal (40% aqueous solution) (bisphenol A:glyoxal molar ratio 1:3.15), 30g ammonia water (18% aqueous solution) was added, and the pressure was 0.05MPa at 60℃ constant temperature 3 Hours to obtain phenolic resin.

Embodiment 2

[0035] Mix 100g of bisphenol B, 40g of glyoxal (40% aqueous solution) (bisphenol B:glyoxal molar ratio 1:0.67) and 20g of methanol, add 20g of triethylamine, under a pressure of 2.0MPa, 130°C React at a constant temperature for 3 hours to obtain an intermediate;

[0036] Then the intermediate is mixed with 100 g of formaldehyde (37% aqueous solution) (bisphenol B:formaldehyde molar ratio 1:2.99), 20 g of potassium hydroxide is added, and the phenolic resin is obtained at a constant temperature of 60° C. for 3 hours under a pressure of 0.08 MPa.

Embodiment 3

[0038] Mix 100g bisphenol P, 20g furfural (bisphenol P:furfural molar ratio 1:0.72) and 25g ethanol, add 30g sodium hydroxide, 20g triethylamine, and react at 110°C for 2 hours under a pressure of 1.0MPa , Get the intermediate;

[0039] Then the intermediate was mixed with 80 g of formaldehyde (37% aqueous solution) (bisphenol P:formaldehyde molar ratio 1:3.42), and kept at a constant temperature of 50° C. for 4 hours under a pressure of 0.03 MPa to obtain a phenolic resin.

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PUM

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Abstract

The invention relates to the technical field of synthesis of phenol-formaldehyde resin, in particular to the phenol-formaldehyde resin which is thermosetting resin. Bisphenol type compounds and aldehyde compounds 1 are mixed and subjected to a constant-temperature reaction under certain pressure under the action of a catalyst, and an intermediate body is obtained; the intermediate body and aldehyde compounds 2 are subjected to a constant-temperature reaction under certain pressure under the action of the catalyst, and the phenol-formaldehyde resin is obtained. The phenol-formaldehyde resin is obtained through the reactions at different temperatures under different pressures in combination of the adding quantity of catalysts and formaldehyde, the obtained phenol-formaldehyde resin is the thermosetting resin, and the phenol-formaldehyde resin can be cured at the high temperature without a curing agent; fabric, paper and boards prepared from the phenol-formaldehyde resin have lower free formaldehyde content, are more environment-friendly and have lower odor, and the use environment is more excellent.

Description

Technical field [0001] The invention relates to the technical field of phenolic resin synthesis, in particular to a phenolic resin and a preparation method thereof. Background technique [0002] The impregnating resin generally uses phenol-formaldehyde resin, melamine-formaldehyde resin, and urea-formaldehyde resin. The impregnated substrate is generally selected from paper, cloth, man-made fiber, non-woven fabric, etc. However, in the prior art, a major problem with the obtained material is that the odor remains serious, especially the high formaldehyde content in it, which causes harm to the human body when used. [0003] There is also the problem of residual formaldehyde in automobile filter paper, mainly because the residual formaldehyde content of phenol-formaldehyde resin, melamine-formaldehyde resin, and urea-formaldehyde resin is too high to meet the standard. [0004] The main reason for the residual odor is the process and ingredients. In terms of technology, because the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/04C08G8/20C08G8/06
CPCC08G8/04C08G8/06C08G8/20
Inventor 李枝芳张宝印隗骁健
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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