A kind of decolorization method of hydrocarbon-phenol type resin
A phenolic and resin technology, applied in the field of decolorization of hydrocarbon-phenolic resins, can solve the problems of poor marking, low operation efficiency, inability to guarantee product qualification, etc., and achieve the effect of reducing usage and reducing reaction time.
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Embodiment 1
[0046] Dissolve 500g of DCPD-phenol resin with a Gardner color number of 18 or more in 750g of toluene, add 35g of dioxane, heat to 45°C in a nitrogen atmosphere, add 10g of 325 mesh zinc powder, react for 0.5 hours, and heat up to The decolorization reaction was carried out at 92° C. for 1.2 hours to obtain a solid-liquid mixture.
[0047] The above-mentioned solid-liquid mixture was filtered to obtain the filtrate and the zinc powder residue, and the zinc powder residue was dried to obtain 9.4 g of zinc powder.
[0048] The above filtrate was distilled under reduced pressure at -0.095MPa and 160°C to obtain decolorized DCPD-phenol resin.
[0049] After calculation, the decolorized DCPD-phenol resin is 493g. The decolorized DCPD-phenol resin has a Gardner color number of 12-13, light yellow, light coloring and good chroma.
Embodiment 2
[0051] Dissolve 500g of DCPD-phenol resin with a Gardner color number of 18 or more in 750g of toluene, add 35g of dioxane, heat to 45°C in a nitrogen atmosphere, add 10g of 325-mesh zinc powder (including the one recovered in Example 1) 9.4g of zinc powder), reacted for 0.5 hours, raised the temperature to 92°C for decolorization reaction for 1.2 hours, and obtained a solid-liquid mixture.
[0052] The above-mentioned solid-liquid mixture was filtered to obtain the filtrate and the zinc powder residue, and the zinc powder residue was dried to obtain 9.8 g of zinc powder.
[0053] The above filtrate was distilled under reduced pressure at -0.095MPa and 160°C to obtain decolorized DCPD-phenol resin.
[0054] After calculation, the decolorized DCPD-phenol resin is 493g. The decolorized DCPD-phenol resin has a Gardner color number of 12-13, light yellow, light coloring and good chroma.
Embodiment 3
[0056]Dissolve 500g of α-pinene-tert-butylphenol resin with a Gardner color number of 18 or more in 800g of methyl isobutyl ketone, add 37g of propylene glycol methyl ether, heat to 50°C in a nitrogen atmosphere, and add 100 mesh 11 g of aluminum powder was reacted for 0.5 hours, and the temperature was raised to 95° C. for decolorization reaction for 1.5 hours to obtain a solid-liquid mixture.
[0057] The above solid-liquid mixture was filtered to obtain the filtrate and the aluminum powder filter residue, and the aluminum powder filter residue was dried to obtain 10.3 g of aluminum powder.
[0058] The above filtrate was distilled under reduced pressure at -0.1MPa, 200°C to obtain the decolorized α-pinene-tert-butylphenol resin.
[0059] After calculation, the α-pinene-tert-butylphenol resin after decolorization is 490g, and the Gardner color number of the α-pinene-tert-butylphenol resin after decolorization is 13~14, light brown, light colored, color The degree is good. ...
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