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production, structure and performance of alcohol-soluble polyurethane resin for ink

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production, structure and performance of alcohol-soluble polyurethane resin for ink

April 29, 2024

Preparation method: Usually, alcohol-soluble polyurethane resin is synthesized with polyester or polyether polyols, alicyclic diisocyanates and binary amine / binary alcohol chain extenders as the main raw materials through reactions. During the preparation process, the performance of the resin can be optimized by changing the reaction conditions and types of materials.
Structural features: The molecular chain of alcohol-soluble polyurethane resin contains polar groups, such as urethane and ureido carbamate, which give it good dispersion and wetting performance for pigments. At the same time, the degree of microphase separation and hydrogen bonding will increase with the increase of the hard segment content.
Performance research:
- Mechanical properties: With the increase of the degree of microphase separation, the mechanical properties such as tensile strength and fixed elongation strength of alcohol-soluble polyurethane resin will increase, but the elongation at break will decrease.
- Hydrolysis resistance and alcohol resistance: The addition of polyhydroxy compounds for end-capping can improve the hydrolysis resistance and alcohol resistance of polyester polyether polyurethane.
- Affinity with pigments / dyes: Alcohol-soluble polyurethane resin has a good affinity and wettability with pigments / dyes, which helps to improve the quality of ink.
- Film forming performance: The ink made from this resin has good film forming performance, which can ensure the quality of the printed matter.
Research significance: The synthesis of high-performance alcohol-soluble polyurethane resin is of great significance for improving the quality and performance of ink, and at the same time, attention should also be paid to its environmental protection and safety.

It should be noted that the above information is only a general introduction, and the specific research content and results may vary due to the experimental design and conditions of the researchers. If you are interested in the research in this field, it is recommended to consult relevant academic literature or professional personnel for more detailed and accurate information.