CN-118048067-B - Water-based ink wetting leveling agent composition and preparation method and application thereof

Abstract

The invention relates to the technical field of fine chemical engineering, in particular to a water-based ink wetting and leveling agent composition, a preparation method and application thereof, wherein the invention adopts linear A-B-C structure alkyne diol ether single-end modified polysiloxane with rapid equilibrium water-based system dynamic surface tension, isoolefine butyl polyether modified heptamethyl trisiloxane surfactant with high efficiency of reducing water-based system static surface tension and biosurfactant with high system compatibility, as the efficient wetting leveling agent for the water-based ink, the dispersion performance of each pigment and filler of the water-based ink is effectively improved, the benard vortex paint film defects of flooding, bloom, shrinkage and the like caused by density and surface property differences among the pigment and filler in a water-based ink system are greatly improved, the performances of smoothness, waterproofness and the like of the paint film are improved, and a printed matter with high flatness is obtained.

Inventors

• YU LONGFEI
• JIA KANGLE
• LIU XINGXING
• LIN ZEFENG
• NING JUNHUA
• LIN JINXI

Assignees

• 广东锦龙源印刷材料有限公司

Dates

Publication Date

20260505

Application Date

20240202

Claims (5)

1. 1. The water-based ink wetting leveling agent composition is characterized by being prepared from 30-70 parts of alkyne glycol ether single-end modified polysiloxane, 20-50 parts of isobutyl polyether modified heptamethyltrisiloxane and 10-30 parts of biosurfactant according to weight parts; the alkyne diol ether single-end modified polysiloxane has the following structure: , wherein R has the structure shown below: wherein R1 is-CH 3 or-CH 2CH3, n is 5-60, m is 8-10, and k is 10-16; The isobutyl polyether modified heptamethyl trisiloxane has the structure shown as follows: , Wherein Y is-CH 2C (CH 3) 2 (OCH (CH 3) CH 2) e (OCH 2CH 2) fOCH < 3 >, e is 0-3, and f is 6-10; the biosurfactant comprises one or more of rhamnolipid, sophorose ester and lipopeptide.
2. 2. The aqueous ink wetting and leveling agent composition according to claim 1 is characterized in that the application of the aqueous ink wetting and leveling agent composition in the aqueous ink wetting and leveling agent is that the alkyne glycol ether single-end modified polysiloxane, the isoolefine butyl polyether modified heptamethyl trisiloxane and the biosurfactant are mixed and stirred uniformly to prepare the aqueous ink wetting and leveling agent.
3. 3. The application of the aqueous ink wetting and leveling agent composition in the aqueous ink wetting and leveling agent, according to claim 2, wherein the temperature for uniformly mixing and stirring is 10-40 ℃.
4. 4. The application of the aqueous ink wetting and leveling agent composition in the aqueous ink wetting and leveling agent according to claim 2, wherein the speed of mixing and stirring uniformly is 100 rpm-300 rpm.
5. 5. The application of the aqueous ink wetting and leveling agent composition in the aqueous ink wetting and leveling agent, according to claim 2, wherein the time for uniformly mixing and stirring is 0.5-1 h.

Description

Water-based ink wetting leveling agent composition and preparation method and application thereof Technical Field The invention belongs to the technical field of fine chemical engineering, and particularly relates to a water-based ink wetting and leveling agent composition, and a preparation method and application thereof. Background The water-based ink mainly uses water as a diluent, has high surface tension, is difficult to wet a non-absorbent substrate, particularly a low surface energy film substrate (PP, PE, PET), and easily generates surface defects such as shrinkage cavity, edge shrinkage, orange peel, floating color and the like in the film forming process. In the production and use process of the water-based ink, the floating color and the bloom are caused by the pigment participating in the circulation flow of the system, and different pigments interact due to the corresponding different liquidity. With these flows and turbulences in the coating film, the different pigments are severely separated in the turbulence due to the difference in particle size, density, and a distinct pattern appears due to the difference in color, which is particularly evident in the light gray aqueous ink. The flooding means that the pigment in the wet film of the water-based ink is separated in a layered manner in the horizontal direction, the bleeding means that the pigment in the wet film is separated in the vertical direction, and is usually in a stripe shape or a honeycomb shape, and certain pigments are concentrated on the hexagonal boundaries of the benard vortex, so that the hexagonal arrangement is clearly visible. There are many reasons for causing the flooding of the aqueous ink, including different particle sizes, different densities of pigments, different hydrophilicities of various substances, different charges, compatibility of resin and color paste, and the like. Resins and solvents that adsorb small particle size pigments tend to adsorb much more than large particle size pigments, generally manifested as a smaller density of small particle size pigments and a larger density of large particle size pigments. The large particle size pigment particles become dense, which causes pigment particles to sink, while the small particle size pigment floats up, thus constituting a flooding phenomenon of the printing ink. In order to overcome the poor wetting and leveling of aqueous inks in the printing of non-absorbent substrates, in particular low surface energy film substrates (PP, PE, PET), it is absolutely necessary to flow and dry the wet film to give a smooth and clear pattern, since it is not possible to obtain a continuous, clear and smooth surface film without these wetting and leveling agents. Among various leveling agents, the organosilicon wetting leveling agent is the most widely used water-based paint ink wetting leveling agent at present because of the capability of efficiently and rapidly balancing surface tension, solving the paint film defect caused by benard vortex, and simultaneously having wetting dispersion of pigment and filler and certain waterproof performance of a coating film. The related art discloses a polyether polyester modified organosilicon leveling agent with a number average molecular weight of 100315, which is prepared by stirring and reacting side chain hydrogen-containing silicone oil with allyl polyether under the condition of methyl isobutyl ketone solvent. But the method uses methyl isobutyl ketone as a solvent, and the molecular weight of the organosilicon leveling agent of the structure exceeds 10 ten thousand, so that the migration capability of the organosilicon leveling agent in a paint and ink system is greatly limited, the capability of the organosilicon leveling agent in dynamic balance of surface tension is very weak, and the organosilicon leveling agent does not have the capability of rapidly reducing the surface tension of the system in the high-speed printing or high-speed spraying process of water-based ink. The effect of a silicone wetting and leveling agent in printing non-absorbent substrates with aqueous inks depends on its ability to reduce the static surface tension of the system and its ability to rapidly equilibrate the dynamic surface tension (dynamic surface activity) of the system. In particular to the molecular weight of polysiloxane, the type, size, position and quantity of organic groups, and the linking mode of the organic group modified polysiloxane can influence the action and effect of the organic group modified polysiloxane. Therefore, how to develop the water-based ink wetting and leveling agent with low surface tension and high dynamic surface activity for low-energy surface printing by technical innovation and compatibility technology application, and apply the water-based ink wetting and leveling agent to water-based ink, water-based paint, water-based varnish and other systems is a problem to be solved urgently at present. Disclosure of In