Environment friendly single-sheet offset printing ink and preparation thereof
An environmentally friendly, paper-adhesive technology, used in inks, household appliances, applications, etc., can solve problems such as slow fixation, and achieve the effect of fast fixation
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Embodiment 1
[0060] Generally, the preparation process of high-viscosity rosin-modified phenolic resin A (resin commonly used in sheet-fed offset printing inks on the market at this stage) is as follows:
[0061] First, put 51.2g of rosin into the reaction pot, add N 2 For protection, raise the temperature to 200°C and keep stirring until the rosin is completely melted; then, add 6.8g of pentaerythritol, 1.8g of anhydride and 30.2g of alkylphenol into the reaction pot, and add 12.5g of polymer when the temperature drops to 120°C Formaldehyde reacts. Keep warm at 115-120°C for condensation reaction for 4 hours, then heat up for dehydration. After dehydration, gradually raise the temperature to 280°C for heat preservation and esterification for 4 hours; finally, when the acid value of the resin reaches 10-35mgKOH / g, stop Heat preservation and heating, turn over to vacuumize, after vacuumize completes sampling re-examination index qualified, general high-viscosity rosin modified phenolic resin...
Embodiment 2
[0077] The steps for preparing high-viscosity structural resin C are as follows:
[0078] First, put 35g rosin into the reaction pot, add N 2 or CO 2 Protection, then, raise the temperature to 200°C and keep stirring until the rosin is completely melted; then, add 4.35g of pentaerythritol, 0.3g of anhydride and 45g of alkylphenol to the reaction pot, and when the temperature drops to 120°C Add 18.2g of paraformaldehyde for reaction, conduct insulation condensation reaction at 120-125°C for 10h, then raise the temperature for dehydration, after dehydration, gradually raise the temperature to 260°C for insulation esterification for 5h; finally, take a sample to detect the acid value of the resin reaches When the temperature is 10-35mgKOH / g, stop heat preservation and heating, turn to vacuuming, and obtain high-viscosity structural resin C after the vacuuming is completed and the sampling re-inspection index is qualified.
[0079] The steps for preparing high-viscosity resin oi...
Embodiment 3
[0091] When preparing environment-friendly sheet-fed offset printing ink, the dosage of each component in Examples 1 and 2 and the collocation of raw material varieties can be adjusted according to actual needs, so as to obtain an environment-friendly sheet-fed offset printing ink with excellent printing suitability and stability .
[0092] (1) Selection of resin: the low-viscosity structural resin B prepared in Example 1 and the high-viscosity structural resin C prepared in Example 2 were used.
[0093] (2) Selection of resin oil: adopt the low-viscosity resin oil BB prepared in Example 1 and the high-viscosity resin oil CC prepared in Example 2.
[0094] (3) prepare printing ink, comprise the steps:
[0095] First, take 45g of high-viscosity resin oil CC and 30g of low-viscosity resin oil BB, add 17g of selected pigments that meet the standards; then add 6g of aromatic-free high-boiling mineral oil, 1.0g of wax powder and 0.2 g mixture of anti-skinning agents; then, in a c...
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