US2008221243A1PendingUtilityA1
Fluidising composition
Est. expirySep 9, 2022(expired)· nominal 20-yr term from priority
C04B 24/003C04B 24/2688C04B 24/2694C04B 40/0028C04B 40/0039C04B 2103/32C04B 2111/00155C04B 2111/00172C08K 5/5317
50
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Claims
Abstract
A fluidising admixture for use with sprayable cementitious compostions, the admixture consists of 2-phosphonobutane-1,2,4-tricarboxylic acid and at least one selected polymer derived from ethylenically-unsaturated mono- or dicarboxylic acids. Citric acid may optionally be present. The admixture has good fluidising properties and outstanding shelf-life.
Claims
exact text as granted — not AI-modified1 - 5 . (canceled)
6 . A method of imparting flow to a cementitious composition, comprising the addition thereto of an admixture comprising:
(1) 2-phosphonobutane-1,2,4-tricarboxylic acid; (2) optionally, citric acid or citric acid monohydrate; and (3) at least one polymer derived from ethylenically-unsaturated mono- or dicarboxylic acids, and characterised in that the polymer comprises: a) 51-95 mole % of moieties of formula 1a and/or 1b and/or 1c
wherein R 1 =hydrogen or a C 1-20 aliphatic hydrocarbon residue;
X=O a M, —O—(C m H 2m O) n—R 2 , —NH—(C m H 2m O) n —R 2 ,
M=hydrogen, a mono- or divalent metal cation, an ammonium ion or an organic amine residue;
a=0.5 or 1;
R 2 =hydrogen, C 1-20 aliphatic hydrocarbon, C 5-8 cycloaliphatic hydrocarbon or optionally substituted C 6-14 aryl residue;
Y=O, NR 2 ;
m=24; and
n=0-200;
b) 1-48.9 mole % of moieties of the general formula II
wherein R 3 =hydrogen or C 1-5 aliphatic hydrocarbon;
p=0-3; and
R 2 has the meaning given previously;
c) 0.1-5 mole % of moieties of Formulae IIIa or IIIb
wherein S=H, —COO a M, —COOR 5
—W—R 7
—CO—[NH—CH 2 ) 3 ] s —W—R 7
—CO—O—(CH 2 ) z —W—R 7
—(CH 2 ) z—V—(CH 2 ) z —CH═CH—R 2
—COOR 5 when S is —COOR 5 or COO a M
U 1 =—CO—NH—, —O—, —CH 2 O—
U 2 =—NH—CO—, —O—, —OCH 2 —
V=—O—CO—C 6 H 4 —CO—O— or —W—
R 4 =H, CH 3
R 5 =H, C 3-20 alphatic hydrocarbon residue, a C 5 -C 8 cycloaliphatic hydrocarbon residue or a C 6-14 aryl residue;
wherein r=2-100
s=1, 2
z=0-4
x=1-150
y=0-15; and
d) 0-47.9 mole % of moieties of the general formula IVa and/or IVb:
wherein a, M, X and Y have the meanings defined above.
7 . The method according to claim 6 , in which:
a) the moiety is according to formula Ia;
R 1 , R 2 are independently H or CH 3 ;
X=O a M, —O—(C m H 2m O) n —R 2
M=H or a mono- or divalent metal cation;
a=1;
Y=O, NR 2 ;
m=2-3; and
n=20-150;
b) R 2 , R 3 are independently H or CH 3 ; and
p=0-1;and
c) the moiety is according to formula IIIa;
S=H, —COO a M, —COOR 5
—CO—[NH—(CH 2 ) 3 ] s —W—R 7
—CO—O—(CH 2 ) z —W—R 7
R 4 , R 5 are independently H, CH 3 ;
wherein
U 1 =—CO—NH—, —O—, —CH 2 O—
U 2 =—NH—CO—, —O—, —OCH 2 —
x=20-50;
y=1-10; and
z=0-2.
8 . The method according to claim 7 , in which:
a) the moiety is according to formula Ia;
R 1 =H;
R 2 =CH 3 ;
X=O a M;
M=a mono- or divalent metal cation;
Y=O, NR 2 ;
m=2; and
n=25-50;
b) R 2 , R 3 =H; and
p=0; and
c) the moiety is according to formula IIIa;
S=H, —COO a M;
—CO—O—(CH 2 ) z —W—R 7
R 4 , R 5 =H;
wherein
U 1 =—CO—NH—;
U 2 =—NH—CO—, —O—, —OCH 2 —
x=20-50;
y=5-10; and
z=1-2.
9 . The method of claim 6 wherein the polymer has a weight-average molecular weight of from about 5,000 to about 50,000.
10 . The method of claim 6 wherein the polymer has a weight-average molecular weight of from about 10,000 to about 40,000.
11 . The admixture of claim 6 wherein the proportions of the solids of the three components are:
Component 1—about 1% to about 40%; Component 2—0 to about 40%; and Component 3—about 5% to about 60%.
12 . The method of claim 6 wherein the admixture is added at a rate of from about 0.2% to about 2% by weight solids of cement.
13 . A method of spraying a cementitious composition comprising preparing a cementitious mix and conveying the mix to a spray nozzle, there being added to the mix at preparation an admixture comprising:
(1) 2-phosphonobutane-1,2,4-tricarboxylic acid; (2) optionally, citric acid or citric acid monohydrate; and (3) at least one polymer derived from ethylenically-unsaturated mono- or dicarboxylic acids, and characterised in that the polymer comprises: a) 51-95 mole % of moieties of formula 1a and/or 1b and/or 1c
wherein R 1 =hydrogen or a C 1-20 aliphatic hydrocarbon residue;
X=O a M, —O—(C m H 2m O) n —R 2 , —NH—(C m H 2m O) n —R 2 ,
M=hydrogen, a mono- or divalent metal cation, an ammonium ion or an organic amine residue;
a=0.5 or 1;
R 2 =hydrogen, C 1-20 aliphatic hydrocarbon, C 5-8 cycloaliphatic hydrocarbon or optionally substituted C 6-14 aryl residue;
Y=O, NR 2 ;
m=2-4; and
n=0-200;
b) 1-48.9 mole % of moieties of the general formula II
wherein R 3 =hydrogen or C 1-5 aliphatic hydrocarbon;
p=0-3; and
R 2 has the meaning given previously;
c) 0.1-5 mole % of moieties of Formulae IIIa or IIIb
wherein S=H, —COO a M, —COOR 5
—W—R 7
—CO—[NH—(CH 2 ) 3 ] s —W—R 7
—CO—O—(CH 2 ) z —W—R 7
—(CH 2 ) z —V—CH 2 ) z —CH═CH—R 2
—COOR 5 when S is —COOR 5 or COO a M
U 1 =—CO—NH—, —O—, —CH 2 O—
U 2 =—NH—CO—, —O—, —OCH 2 —
V=—O—CO—C 6 H 4 —CO—O— or —W—
R 4 =H, CH 3
R 5 =a C 3-20 alphatic hydrocarbon residue, a C 5 -C 8 cycloaliphatic hydrocarbon residue or a C 6-14 aryl residue;
wherein r=2-100
s=1, 2
z=0-4
x=1-150
y=0-15; and
d) 0-47.9 mole % of moieties of the general formula IVa and/or IVb:
wherein a, M, X and Y have the meanings defined above.
14 . The method according to claim 13 , in which:
a) the moiety is according to formula Ia;
R 1 , R 2 are independently H or CH 3
X=O a M, —O—(C m H 2m O) n —R 2
M=H or a mono- or divalent metal cation;
a=1;
Y=O, NR 2 ;
m=2-3; and
n=20-150;
b) R 2 , R 3 are independently H or CH 3 ; and
p=0-1;and
c) the moiety is according to formula IIIa;
S=H, —COO a M, —COOR 5
—CO—[NH—(CH 2 ) 3 ] s —W—R 7
—CO—O—(CH 2 ) z —W—R 7
R 4 , R 5 are independently H, CH 3 ;
wherein
U 1 =—CO—NH—, —O—, —CH 2 O—
U 2 =—NH—CO—, —O—, —OCH 2 —
x=20-50;
y=1-10; and
z=0-2.
15 . The method according to claim 14 , in which:
a) the moiety is according to formula Ia;
R 1 =H;
R 2 =CH 3 ;
X=O a M;
M=a mono- or divalent metal cation;
Y=O, NR 2 ;
m=2; and
n=25-50;
b) R 2 , R 3 =H; and
p=0; and
c) the moiety is according to formula IIIa;
S=H, —COO a M;
—CO—O—(CH 2 ) z —W—R 7
R 4 , R 5 =H;
wherein
U 1 =—CO—NH—;
U 2 =—NH—CO—, —O—, —OCH 2
x=20-50;
y=5-10; and
z=1-2.
16 . The method of claim 13 wherein the polymer has a weight-average molecular weight of from about 5,000 to about 50,000.
17 . The method of claim 13 wherein the polymer has a weight-average molecular weight of from about 10,000 to about 40,000.
18 . The admixture of claim 13 wherein the proportions of the solids of the three components are:
Component 1—about 1% to about 40%; Component 2—0 to about 40%; and Component 3—about 5% to about 60%.
19 . The method of claim 13 wherein the admixture is added at a rate of from about 0.2% to about 2% by weight solids of cement.Cited by (0)
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