Curable composition, cured product, and method for producing curable composition

The curable composition with specific polymers A and B, featuring reactive silicon groups and controlled silylation rates, addresses slow curing and strength issues, resulting in a cured product with enhanced tensile strength and curing rate.

JP2026028376APending Publication Date: 2026-02-20AGC INC
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Patent Information

Application Number
JP2024130739
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-08-07
Publication Date
2026-02-20

AI Technical Summary

Technical Problem

Existing curable compositions with reactive silicon groups have slow curing rates and inadequate tensile strength in cured products.

Method used

A curable composition comprising polymers A and B, where polymer A has an average of 2.0 or more terminal groups per molecule with a silylation rate of 85 to 100 mol%, and polymer B has a lower silylation rate, both containing reactive silicon groups, unsaturated groups, and hydroxyl groups, to enhance crosslinking and curing.

Benefits of technology

The composition achieves a cured product with improved tensile strength and curing rate, ensuring high modulus and elongation properties.

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Abstract

To provide a curable composition which gives a cured product having good tensile strength and is excellent in curing rate, a cured product of the curable composition, and a method for producing the cured composition.SOLUTION: A curable composition comprising a polymer A and a polymer B, wherein the polymer A is an oxyalkylene polymer having two or more terminal groups in one molecule, the terminal groups not having a divalent organic group represented by - C (= O) NH - and having at least one group selected from the group consisting of a reactive silicon group, an unsaturated group, and a hydroxyl group, and having a silylation ratio of 85 to 100 mol%, the terminal group is an oxyalkylene polymer that does not have a divalent organic group represented by -C (= O) NH -, has at least one group selected from the group consisting of a reactive silicon group, an unsaturated group, and a hydroxyl group, and has a silylation ratio smaller than a silylation ratio of the polymer A.SELECTED DRAWING: None
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Citation Information

Patent Citations

  • Curable composition

    JP3934276B2