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Vegetable oil modified rosin phenolic resin and preparation method thereof

A rosin phenolic resin and vegetable oil modification technology, which is applied in the directions of printing ink, household appliances, and application, can solve the problems of low heptane tolerance, difficult to reach softening point, low n-heptane value, etc., and achieves improved solubility, Remarkable environmental protection effect, the effect of improving solubility

Inactive Publication Date: 2013-02-06
山西省应用化学研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN1341673A reported a preparation process of rosin-modified mixed alkylphenol-formaldehyde resin, the prepared resin has high gloss and good emulsification resistance, but the n-heptane value is low and the solubility is poor
However, because the resin contains unreacted vegetable oil as a residual solvent, the solubility of the resin in the subsequent ink preparation is an illusion, the actual heptane tolerance is not large, and the softening point is difficult to meet the requirements of thermosetting offset printing inks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take 185.4g of p-tertoctylphenol, 14g of NaOH and 100g of toluene, add it into a 1000mL four-necked reaction flask with a condenser, heat and melt until it becomes transparent, cool to 60°C, slowly add 153g of 37% formaldehyde dropwise, and finish adding Afterwards, keep the reaction at 80°C for 4 hours, lower the temperature to 50°C, neutralize with 10% hydrochloric acid solution to pH = 6, let stand and separate, wash the organic layer twice, discard the water layer, and distill under reduced pressure to obtain the condensation of alkylphenol-formaldehyde resin Product (condensate) 320g.

[0024] Add 302g of rosin and 30g of tung oil into a 1000mL four-necked reaction bottle, heat up to 185°C after heating and melting, slowly add 320g of condensation liquid dropwise, after 2.5 hours, add 0.6g of ZnO, stir evenly, slowly add 30g of glycerin at 220°C, After the addition, keep at 230°C for 2 hours, then raise the temperature to 250°C to react until the acid value is less...

Embodiment 2

[0026] Take 220g of p-nonylphenol, 17g of NaOH and 140g of toluene, add it into a 1000mL four-necked reaction flask with a condenser, heat and melt until it becomes transparent, cool to 60°C, slowly add 170g of 37% formaldehyde dropwise, after the addition is completed, Insulate and react at 75°C for 5 hours, lower the temperature to 50°C, neutralize with 10% hydrochloric acid solution to pH = 6, let stand to separate layers, wash the organic layer twice, discard the water layer, and distill under reduced pressure to obtain the alkylphenol-formaldehyde resin condensate ( condensation liquid) 400g.

[0027] Add 302g of rosin and 70g of linseed oil into a 1000mL four-necked reaction bottle, heat and melt and raise the temperature to 190°C, slowly add 400g of condensation liquid dropwise, after 3 hours, add 0.6g of MgO, stir evenly, slowly add 37g of pentaerythritol at 220°C , after the addition, keep at 230°C for 2 hours, raise the temperature to 270°C to react until the acid va...

Embodiment 3

[0029] Take 48g of p-tert-butylphenol, 132g of p-tert-octylphenol, 9g of NaOH and 130g of toluene, add them into a 1000mL four-necked reaction flask with a condenser, heat and melt until it becomes transparent, cool to 60°C, and slowly add 160g of 37% formaldehyde, after the addition, keep the reaction at 70°C for 6 hours, cool down to 50°C, neutralize with 10% hydrochloric acid solution to pH = 6, let stand to separate layers, wash the organic layer twice, discard the water layer, and depressurize Distilled to obtain 350g of alkylphenol-formaldehyde resin condensate (condensate).

[0030] Add 302g of rosin and 60g of castor oil into a 1000mL four-necked reaction bottle, heat and melt, then raise the temperature to 190°C, slowly add 350g of condensation liquid dropwise, after 2.5 hours, add 0.6g of ZnO, stir evenly, slowly add 37g of pentaerythritol at 220°C , after the addition, keep at 230°C for 2 hours, raise the temperature to 270°C to react until the acid value is less th...

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Abstract

The invention discloses vegetable oil modified rosin phenolic resin and a preparation method thereof. Alkyl phenol reacts with formaldehyde under an alkaline condition to obtain an alkyl phenol resin condensation compound; molten rosin and vegetable oil are firstly used to conduct a Diels-Alder addition reaction; then the alkyl phenol resin condensation compound is dripped into a reaction product of the molten rosin and the vegetable oil to conduct a Diels-Alder addition reaction; and finally, after a final reaction product is esterified, the vegetable oil modified rosin phenolic resin is prepared. The preparation method has the advantages that through the Diels-Alder reaction of the rosin and the vegetable oil, an aliphatic chain is led to a molecular structure, so that the solubility of the rosin phenolic resin in mineral oil is effectively improved, and a softening point of the resin is guaranteed at the same time; the n-heptane accommodation degree is larger than or equal to 20mL / 2g and the acid value is smaller than or equal to 25mgKOH / g, so that the vegetable oil modified rosin phenolic resin can serve as matrix resin of heat-set ink and satisfies the requirements of fast drying, high gloss, demulsibility, and the like of the heat-set ink.

Description

technical field [0001] The invention relates to a phenolic resin for ink, in particular to a high heptane tolerance rosin phenolic resin for thermosetting offset printing ink, and a preparation method of the phenolic resin. Background technique [0002] The resins used in offset printing inks are mainly rosin-modified phenolic resins. For many years, the country has been using a two-step production process to process such resins, that is, firstly prepare phenolic resins with alkylphenols and formaldehyde, and then react the resins with rosin and polyols together. Preparation of rosin modified phenolic resin. The ink produced with this kind of resin has the characteristics of good adhesion and good body bone. [0003] With the development of today's printing industry, the printing speed continues to increase, requiring heat-set offset printing inks to have the characteristics of high softening point, high viscosity, and high heptane tolerance. However, as the softening poin...

Claims

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Application Information

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IPC IPC(8): C08G8/34C08G8/32C09D11/10C09D11/103
Inventor 李萍吴建兵马国章侯彩英原丽平刘伟
Owner 山西省应用化学研究所
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