Air entraining agent for concrete and mortar mixtures
US5759259A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1996 |
| Grant date | Jun 2, 1998 |
| Priority date | — |
| Expiry date | Sep 26, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/29
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An air entraining agent based on rosin for a composition which contains cement and which is one of mortar or concrete includes at least one rosin salt which is a reaction product of materials including rosin and from 0.5 to 50 weight % of amino alcohol; and alkali which is at least one material selected from the group consisting essentially of sodium hydroxide, potassium hydroxide, and sodium carbonate, which functions at least as a pH adjusting agent and is present in amounts effective to provide a preselected alkaline pH, and which is optionally included in the materials which form said reaction product, wherein the rosin is at least one rosin selected from the group consisting essentially of gum rosin, modified gum rosin, tall oil rosin, and wood rosin, wherein the amino alcohol is at least one amino alcohol selected from the group consisting essentially of ethanol amine, diethanol amine, triethanol amine, dimethyl ethanol amine, methyl diethanol amine, tri-n-propanol amine, triisopropanol amine, isobutyl diethanol amine, and n-butyl diethanol amine, and functions to prevent ester and amide formation, and wherein the air entraining agent has a form selected from the group compri…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.