Additive for hydraulic composition, hydraulic composition, precast concrete, and method for manufacturing precast concrete

The ethyleneamine derivative and polymer-based additive stabilizes the formulation and enhances the aesthetic appearance of hydraulic compositions, addressing stability issues and improving precast concrete surface quality.

JP7765141B1Active Publication Date: 2025-11-06TAKEMOTO OIL & FAT CO LTD
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Patent Information

Application Number
JP2025149317
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2025-09-09
Publication Date
2025-11-06
Estimated Expiration
2045-09-09

AI Technical Summary

Technical Problem

Existing surface aesthetic improvers for hydraulic compositions, such as those containing polyalkylene glycol derivatives, suffer from formulation stability issues when combined with water-reducing agents, making long-term storage and use difficult, and result in surface defects like air bubble marks and depressions in precast concrete.

Method used

A hydraulic composition additive comprising an ethyleneamine derivative and a polymer with controlled neutralization, used in a ratio of 1 to 80% and 20 to 99% by mass, respectively, which enhances surface aesthetics and acts as a water-reducing agent, ensuring compatibility and stability.

Benefits of technology

The additive improves the aesthetic appearance of hardened hydraulic compositions by reducing surface voids and eliminating the need for separate storage, enhancing production efficiency and reducing repair processes.

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Abstract

Provided is an additive for hydraulic compositions that can improve the aesthetic appearance of the set product of the hydraulic composition, and that is excellent in formulation stability while being a one-component additive together with a water-reducing agent. [Solution] The additive for hydraulic compositions contains an ethyleneamine derivative (A) and a polymer (B), and when the total content of the ethyleneamine derivative (A) and the polymer (B) is taken as 100 mass%, the additive contains 1 to 80 mass% of the ethyleneamine derivative (A) and 20 to 99 mass% of the polymer (B), and has a degree of neutralization represented by formula (1) of 0% or more and 30% or less. [Equation 1] TIFF0007765141000016.tif12168 (In formula (1), AV is the acid value (mg KOH / g), and wAV is the weak acid value (mg KOH / g).)
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Citation Information

Patent Citations

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  • Cement-based composition for extrusion molding, process for producing the same, and cement product

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