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US 12,157,700 B2Granted
Modified oxyalkilamines as shrinkage reducing agents in cementitious compositions
AssigneeSika Technology AG
InventorsAndrea Lucero, Pedro Gallegos, Hugo Olivares, Carolina Valdebenito
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Abstract
An adduct of a polyetheramine and an epoxy-containing compound is used as an agent for reducing drying shrinkage and/or drying cracking in a mineral binder composition.
Claims15
A method comprising:
- obtaining an agent that comprises an adduct of a polyetheramine and an epoxy-containing compound for reducing drying shrinkage and/or for reducing drying cracking in a mineral binder composition;
- adding the agent to a composition comprising the mineral binder composition;
- and
- drying and/or hardening the mineral binder composition,
- wherein the agent is added in the composition in an amount of from 0.01 to 10 weight % of the composition such that an amount of the agent is present in the composition following drying and/or hardening of the mineral binder composition to reduce drying shrinkage and/or drying cracking of the mineral binder composition in comparison to a same composition containing none of the agent.
2 more elements
A composition, comprising a mineral binder composition and an agent for reducing drying shrinkage and/or for reducing drying cracking in the mineral binder composition,
- wherein the agent is obtained by forming an adduct by reacting a polyetheramine and an epoxy-containing substance, wherein an amine group of the polyetheramine is alkoxylated with an epoxide group of the epoxy-containing substance, and
- wherein the agent is present in the composition in an amount of from 0.01 to 10 weight % of the composition such that an amount of the agent is present in the composition following drying and/or hardening of the mineral binder composition to reduce drying shrinkage and/or drying cracking of the mineral binder composition in comparison to a same composition containing none of the agent.
Dependencies are inferred from the claim text.