Admixture Composition to Improve Strength of Cement Cured Products

Patent metadata

Field	Value
Publication number	US-2016264465-A1
Application number	US-201415033129-A
Country	US
Kind code	A1
Filing date	Sep 29, 2014
Priority date	Oct 30, 2013
Publication date	Sep 15, 2016
Grant date	—

Abstract

An admixture composition for use in cementitious compositions for improving the properties of the cementitious composition wherein the admixture composition comprises at least a polycarboxylate type comb-polymer dispersant and a hydroxyl amine compound selected from EDIPA (N,N-bis (2 hydroxypropyl)-N-(hydroxyethyl) amine) and optionally one or more polyhydroxyalkyl ethyleneamine compounds.

First claim

1 . An admixture composition for use in cementitious compositions said admixture composition comprising at least
a polycarboxylate type comb-polymer dispersant, and a hydroxyl amine compound selected from N,N-bis (2 hydroxypropyl)-N-(hydroxyethyl) amine (EDIPA) wherein the admixture composition comprises about 20% wt to about 95% wt comb-polymer dispersant and about 5% wt to about 80% wt EDIPA based on the total dry weight of admixture composition.

2 . The admixture composition according to claim 1 wherein the admixture composition comprises about 40% wt to about 90% wt comb-polymer dispersant and about 10% wt to about 60% wt EDIPA based on the total dry weight of admixture composition.

3 . The admixture composition according to claim 1 wherein the polycarboxylate type comb-polymer dispersant is a polymer having carboxylic groups to which pendant groups comprising alkylene oxides are attached to the carboxylic groups via linkages having as an amide, imide, ester, or ether binding.

4 . The admixture composition according to claim 1 further comprising at least one polyhydroxyalkyl ethyleneamine compound according to formula [II]:

Wherein:
R 1 , R 2 =(C 2 H 5 O) x or (C 3 H 7 O) x
R 3 =H, (C 2 H 5 O) x or (C 3 H 7 O) x
R 4 =H or CH 3
n=1-10
x=1 or 2
and wherein the total amount of EDIPA and polyhydroxylalkyl ethyleneamine compounds being present in the admixture composition is in the range 5% wt to about 80% wt calculated on the total dry weight of the admixture composition.

5 . The admixture composition according to claim 4 wherein the polyhydroxyalkyl ethyleneamine compound is a tertiary amine compound and R 3 is selected from (C 2 H 5 O) x and (C 3 H 7 O) x .

6 . The admixture composition according to claim 4 wherein the polyhydroxyalkyl ethyleneamine compound is selected from an aminoethylethanolamine (AEEA), an ethylenediamine (EDA), a diethylenetriamine (DETA), a triethylene tetramine (TETA), a tetraethylene a pentamine (TEPA), a pentaethylene hexamine (PEHA), a high molecular weight ethyleneamine, and a mixture thereof.

7 . The admixture composition according to claim 1 further comprising a defoamer, an air entraining agent, a pigment, a colorant, a retarder, a viscosity modifier, or an anti shrinkage additive.

8 . The admixture composition according to claim 1 further comprising an aqueous and/or organic solvent.

9 . (canceled)

10 . (canceled)

11 . (canceled)

12 . A method for improving the compressive strength of a cured cement product, said method comprising at least the steps of
combining components (a)-(d) to obtain a cementitious composition
(a) the admixture composition according to claim 1 , and
(b) a cementitious binder, and
(c) water, and optional
(d) aggregates and/or filler material; and then
curing the cementitious composition to obtain the cement cured product.

13 . The method according to claim 12 wherein the admixture composition is combined with the cementitious binder before combining the other ingredients (c)-(d).

14 . (canceled)

15 . (canceled)

16 . cementitious composition comprising:
(a) a cementitious binder comprising the admixture composition according to claim 1 wherein the total amount of admixture composition added to the cementitious binder is in the range of at least 0.01% wt up to 2% wt, based on the total dry weight of the cementitious binder, (b) water, (c) optionally an aggregate, and (d) optionally a filler material.

Assignees

• Huntsman Petrochemical Llc

Inventors

• Wibowo Antonius
• Klein Howard P
• Grigsby Jr Robert A

Classifications

• C04B2103/302

  Water reducers · CPC title

• C04B2103/52

  Grinding aids; Additives added during grinding · CPC title

• C04B24/121

  Amines, polyamines · CPC title

• C04B40/0039

  Premixtures of ingredients · CPC title

• C04B24/2641 Primary

  Polyacrylates; Polymethacrylates · CPC title