Claims
- 1. A process for the improvement of the fluidity of cementitious mixes comprising an hydraulic binder, aggregate and water, comprising adding an organic copolymer with recurring units of formula I ##STR6## in which R is an C.sub.2-6 alkylene radical,
- R.sub.1 is C.sub.1-20 alkyl-, C.sub.6-9 cycloalkyl- or phenyl group,
- x,y and z are numbers from 0.01 to 100,
- m is a number from 7 to 20,
- n is a number from 10 to 100,
- with the provisos, that
- i) the ratio of x to (y+z) is from 1:10 to 10:1 inclusive,
- ii) the ratio of z:y is from 3:1 to 100:1, and
- iii) m+n=15-100.
- 2. Cementitious mixes comprising a cementitious product and a copolymer in free acid or salt form containing recurring units of formula I ##STR7## in which R is an alkylene radical with 2 to 6 carbon atoms,
- R.sub.1 is a C.sub.1-20 alkyl-, cycloalkyl- or phenyl group,
- x,y and z are numbers from 0.01 to 100,
- m is a number from 7 to 20,
- n is a number from 10 to 100,
- with the provisos, that
- i) the ratio of x to (y+z) is from 1:10 to 10:1 inclusive,
- ii) the ratio of z:y is from 3:1 to 100:1, and
- iii) m+1=15-100.
- 3. Cementitious mixes according to claim 2, in which the organic copolymer has an average molecular weight from 9000 to 100000.
- 4. Cementitious mixes according to claim 3, in which the organic copolymer has an average molecular weight from 12000 to 36000.
- 5. Cementitious mixes according to claim 2, in which in formula I the ratio of x to (y+z) is from 1:3 to 3:1.
- 6. Cementitious mixes according to claim 2, in which in formula I R is an alkylene radical with 2 or 3 carbon atoms.
- 7. Cementitious mixes according to claim 2, in which in formula I R.sub.1 is a C.sub.1-2 alkyl group.
- 8. Cementitious mixes according to claim 2, in which in formula I n is a number from 18 to 40.
- 9. Cementitious mixes according to claim 2, in which the organic copolymer containing recurring units of formula I in which R is an ethylene group, R.sub.1 is methyl, the ratio of x to (y+z) 1:1, m is a number 11-12 and n is a number 18-25.
Priority Claims (2)
Number |
Date |
Country |
Kind |
3728786 |
Aug 1987 |
DEX |
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3800091 |
Jan 1988 |
DEX |
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Parent Case Info
This is a continuation of application Ser. No. 07/237,121, filed Aug. 26, 1988.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4655838 |
Koga et al. |
Apr 1987 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
237121 |
Aug 1988 |
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