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CN-122011833-A - Modified rosin resin for UV (ultraviolet) ink as well as preparation method and application thereof

CN122011833ACN 122011833 ACN122011833 ACN 122011833ACN-122011833-A

Abstract

The invention belongs to the technical field of modified polymer materials, and discloses a modified rosin resin for UV (ultraviolet) ink, and a preparation method and application thereof. The preparation method comprises (1) carrying out chain extension reaction on hydroxyl silicone oil, epoxy silane monomer and unsaturated double bond-containing silane monomer under the condition of a silanol salt catalyst to obtain epoxy and unsaturated double bond-containing modified silicone oil, (2) adding disproportionated rosin resin and catalyst into a solvent for dissolving and mixing uniformly, heating to 80-120 ℃ under a protective atmosphere, then adding epoxy and unsaturated double bond-containing modified silicone oil, epoxy resin and trimellitic anhydride curing agent for thermal insulation reaction, and carrying out reduced pressure distillation to remove the solvent after the reaction is completed to obtain the modified rosin resin. The disproportionated rosin resin is modified by adopting the specific silicone oil component, so that the flexibility, the glossiness and the weather resistance of the disproportionated rosin resin can be obviously improved. And the specific epoxy resin and the curing agent are adopted to carry out synergistic crosslinking modification, so that good adhesiveness is ensured.

Inventors

  • LIU WEIJUN
  • ZHANG ZHANZHONG
  • LIN WENBIN
  • HUANG MINGHUI

Assignees

  • 韶关德瑞化学工业有限公司

Dates

Publication Date
20260512
Application Date
20260311

Claims (10)

  1. 1. The preparation method of the modified rosin resin for the UV ink is characterized by comprising the following preparation steps: (1) Carrying out chain extension reaction on hydroxyl silicone oil, epoxy silane monomer and unsaturated double bond-containing silane monomer under the condition of a silanol salt catalyst to obtain epoxy group-and unsaturated double bond-containing modified silicone oil; (2) And adding disproportionated rosin resin and a catalyst into a solvent, dissolving and mixing uniformly, heating to 80-120 ℃ under a protective atmosphere, then adding modified silicone oil containing epoxy groups and unsaturated double bonds, epoxy resin and trimellitic anhydride curing agent for heat preservation reaction, and distilling under reduced pressure to remove the solvent after the reaction is completed, thus obtaining the modified rosin resin.
  2. 2. The preparation method of the modified rosin resin for UV ink according to claim 1, wherein the hydroxyl silicone oil is low-viscosity hydroxyl silicone oil with the viscosity of 20-200 cSt at 25 ℃, the epoxy silane monomer is 3- (2, 3-glycidoxy) propyl methyl diethoxy silane or 3- (2, 3-glycidoxy) propyl methyl dimethoxy silane, and the unsaturated double bond-containing silane monomer is methyl vinyl dimethoxy silane, methyl vinyl diethoxy silane, methacryloxypropyl methyl dimethoxy silane or methacryloxypropyl methyl diethoxy silane.
  3. 3. The method for preparing the modified rosin resin for UV ink according to claim 2, wherein the mass ratio of the hydroxyl silicone oil to the epoxy silane monomer to the unsaturated double bond-containing silane monomer is 100:1-10:1-10.
  4. 4. The preparation method of the modified rosin resin for the UV ink, which is disclosed in claim 1, is characterized in that the silanol salt catalyst is sodium silanol or potassium silanol, the temperature of the chain extension reaction is 100-120 ℃, and the reaction time is 2-8 hours.
  5. 5. The method for preparing the modified rosin resin for UV ink according to claim 1, wherein the catalyst in the step (2) is triethylamine, N-N dimethylaniline, N-N dimethylbenzylamine, triphenylphosphine, benzyltrimethylammonium chloride, tetramethylammonium chloride or tetrabutylammonium bromide, and the solvent is one or more of cyclohexanone, ethyl acetate, dimethylformamide and methyl ethyl ketone.
  6. 6. The method of producing a modified rosin resin for UV ink according to claim 1, wherein the epoxy resin is bisphenol A type epoxy resin or bisphenol F type epoxy resin.
  7. 7. The method for preparing the modified rosin resin for the UV ink according to claim 1, wherein the mass ratio of the disproportionated rosin resin to the modified silicone oil containing epoxy groups and unsaturated double bonds, the epoxy resin and the trimellitic anhydride curing agent is 100:5-20:50-100:15-30.
  8. 8. The preparation method of the modified rosin resin for the UV ink is characterized in that the reaction sequence of the materials in the step (2) is that modified silicone oil containing epoxy groups and unsaturated double bonds is added for heat preservation reaction for 1-3 hours, then epoxy resin is added for heat preservation reaction for 1-3 hours, and finally trimellitic anhydride curing agent is added for heat preservation reaction for 2-4 hours.
  9. 9. A modified rosin resin for UV ink produced by the production method of any one of claims 1 to 8.
  10. 10. Use of a modified rosin resin of claim 9 in UV inks.

Description

Modified rosin resin for UV (ultraviolet) ink as well as preparation method and application thereof Technical Field The invention belongs to the technical field of modified polymer materials, and particularly relates to a modified rosin resin for UV (ultraviolet) ink as well as a preparation method and application thereof. Background The modified rosin resin is widely applied to offset lithographic printing ink because of its good pigment wetting property, good film forming property and adhesive force, and proper viscoelasticity and rheological property which can be given to the binder. The modified rosin resin directly affects the gloss, drying, water resistance, tackiness, rheology, printing properties, etc. of the printing ink. The modified rosin resin used for UV offset printing ink at present is mainly rosin modified phenolic resin, which is a high polymer product generated by carrying out chemical reaction on alkylphenol (phenols used for offset printing ink at present comprise phenol, PTBP p-tert-butylphenol, POP p-tert-octylphenol, PNP nonylphenol and PDDP dodecylphenol), formaldehyde, polyalcohol and rosin. However, in practical application, the rosin modified phenolic resin has the following problems of 1. High softening point (generally more than 150 ℃), high hardness, friable and hard whole ‌ and poor flexibility, 2. High esterification reaction temperature of alkylphenol or polyalcohol and rosin, reaction to generate water, deep color of modified products, difficult color (Fe-Co) reaching below 12# and 3. Poor weather resistance and poor glossiness retention under humid heat and sunlight aging conditions. The above problems result in limited application in some fields. Disclosure of Invention In view of the above drawbacks and shortcomings of the prior art, a primary object of the present invention is to provide a method for preparing a modified rosin resin for UV ink. Another object of the present invention is to provide a modified rosin resin prepared by the above method. It is a further object of the present invention to provide the use of the modified rosin resins described above in UV inks. The invention aims at realizing the following technical scheme: The preparation method of the modified rosin resin for the UV ink comprises the following preparation steps: (1) Carrying out chain extension reaction on hydroxyl silicone oil, epoxy silane monomer and unsaturated double bond-containing silane monomer under the condition of a silanol salt catalyst to obtain epoxy group-and unsaturated double bond-containing modified silicone oil; (2) And adding disproportionated rosin resin and a catalyst into a solvent, dissolving and mixing uniformly, heating to 80-120 ℃ under a protective atmosphere, then adding modified silicone oil containing epoxy groups and unsaturated double bonds, epoxy resin and trimellitic anhydride curing agent for heat preservation reaction, and distilling under reduced pressure to remove the solvent after the reaction is completed, thus obtaining the modified rosin resin. Preferably, the hydroxyl silicone oil is selected from low-viscosity hydroxyl silicone oil with the viscosity of 20-200 cSt at 25 ℃. The molecular weight of the low-viscosity hydroxyl silicone oil is about 500-6000 g/mol, and the low-viscosity hydroxyl silicone oil has higher chain extension reactivity. Preferably, the epoxysilane monomer is selected from 3- (2, 3-epoxypropoxy) propylmethyldiethoxysilane (KH-563) and 3- (2, 3-epoxypropoxy) propylmethyldimethoxysilane (KH-564). Preferably, the unsaturated double bond-containing silane monomer is methyl vinyl dimethoxy silane (YS-2171), methyl vinyl diethoxy silane (YS-2172), methacryloxypropyl methyl dimethoxy silane or methacryloxypropyl methyl diethoxy silane. Preferably, the mass ratio of the hydroxyl silicone oil to the epoxy silane monomer to the unsaturated double bond-containing silane monomer is 100:1-10:1-10. Preferably, the silanol salt catalyst is sodium silanol or potassium silanol. Preferably, the temperature of the chain extension reaction is 100-120 ℃, and the reaction time is 2-8 hours. The polysiloxane containing the epoxy group and the unsaturated double bond is prepared by dealcoholization condensation chain extension reaction of hydroxyl silicone oil, an epoxy silane monomer and a silane monomer containing the unsaturated double bond, wherein the epoxy group can react with carboxyl in disproportionated rosin resin and further carry out curing crosslinking reaction with the epoxy resin and a trimellitic anhydride curing agent, so that the chemical modification of the disproportionated rosin resin is realized. The unsaturated double bond can participate in the photo-curing reaction of the UV ink, thereby improving the performance of the UV ink. Preferably, the catalyst in step (2) is triethylamine, N-N dimethylaniline, N-N dimethylbenzylamine, triphenylphosphine, benzyltrimethylammonium chloride, tetramethylammonium chloride or tetrabutylammo