A high-stability papermaking dry-strength agent based on acrylamide and a preparation method thereof
By combining hexamethylenetetramine, isocyanate and other components, a stable amphoteric polyacrylamide is formed, which solves the problem of instability of existing dry strength agents and improves the strength and durability of paper.
CN118308905BActive Publication Date: 2026-06-02广东鑫甬生物科技有限公司
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Patent Information
- Application Number
- CN202410409277.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2026-06-02
- Estimated Expiration
- 2044-04-07
AI Technical Summary
Technical Problem
The polymerization reaction of existing acrylamide-based dry strength agents is unstable and easily affected by environmental conditions and pulp composition, resulting in insufficient chemical stability and durability of paper.
Method used
A stable amphoteric polyacrylamide is formed by polymerizing a composite of hexamethylenetetramine, isocyanate, acrylamide, cationic monomers, and anionic monomers, which enhances fiber bonding and improves paper strength.
Benefits of technology
It improves the dry and wet strength and bursting strength of paper, enhances the bonding force between fibers, has good stability, and can resist environmental changes.
✦ Generated by Eureka AI based on patent content.
Abstract
The application discloses a high-stability papermaking dry-strength agent based on acrylamide and a preparation method thereof, which comprises the following components in parts by weight: 25-40 wt% of acrylamide 40-60 parts, 45-55 wt% of cationic monomer 8-26 parts, 50-65 wt% of anionic monomer 10-24 parts, 12-24 parts of organic silicon waterproof agent, 15-28 parts of chain transfer agent, 14-22 parts of hexamethylenetetramine, 15-27 parts of photosensitive initiator, 10-20 parts of azo initiator, 8-16 parts of free radical trapping agent and 12-18 parts of isocyanate. Through polymerization, the amphoteric polyacrylamide is generated, the amphoteric polyacrylamide can be adsorbed on the surface of the negatively charged fiber in the paper pulp, so that the binding force between the fibers is increased, and the paper strength is improved.
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