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US 2010/0137476 A1Published application
Dispersant for plaster compositions
AssigneeSika Technology AG
InventorsUeli Sulser, Burkhard Mueller, Christina Hampel
Life of this patent
Estimating the term…
Abstract
The present invention relates to the use of a polymer P as a dispersant, particularly as a liquefier, for plaster compositions as well as plaster compositions comprising the polymer P. The polymer P comprises at least one acid unit, at least one ester unit, and at least one amide unit, and the ratio of the acid units to the ester and amide units is between 2 and 6.
Claims23
A method for preparing gypsum compositions, the method comprising:
- adding at least one polymer P as a dispersant to a gypsum composition, the polymer P comprising:
- a) m mol % of at least one structural unit A of the formula (I);
- b) n mol % of at least one structural unit B of the formula (II);
- c) o mol % of at least one structural unit C of the formula (HI);
- and optionally
- d) p mol % of at least one further structural unit D;
- in which R1, independently of one another, is H, CH2COOM or an alkyl group having 1 to 5 carbon atoms,
- in which R2, independently of one another, is H, an alkyl group having 1 to 5 carbon atoms, COOM or CH2COOM;
- in which R3, independently of one another, is H, CH3, COOM or CH2COOM;
- and
- in which R4, independently of one another, is COOM;
- or in which R3 and R4 form a ring to give —CO—O—CO—;
- in which M is H, alkali metal, alkaline earth metal, ammonium, ammonium cation or mixtures thereof;
- in which R5, independently of one another, is
- in which R13 is —[(R9O)x—(R10O)y—(R11—O)z]—R12;
- in which R9, R10 and R11, each independently of one another, is a C2-C4-alkylene group having an order of the (R9O), (R10O) and (R11O) units in any possible sequence;
- in which R12 is H, a C1-C12-alkyl or cycloalkyl radical, a C7-C20-alkylaryl or aralkyl radical, or a substituted or unsubstituted aryl radical;
- in which x, y and z, independently of one another, each have the values 0-250 and x+y+z=3-250;
- in which R6, independently of one another, is H, CH3, COOM, CH2COOM or a substituent as defined for R5;
- in which R7 and R8, together form a ring which optionally contains oxygen, sulfur or further nitrogen atoms;
- or in which R7 and R8, independently of one another, are H, a C1-C20-alkyl group, a C5-C9-cycloalkyl group, a C7-C12-aralkyl group, a hydroxyalkyl group, or a compound of the formula (IV), (V) or (VI),
- in which R14, independently of one another, is an alkylene group and R15 is a C1- to C4-alkyl group and X, independently of one another, is an S, O or N, where r=1 if X═S or O, or r=2 if X═N;
- in which R16 is an alkylene group having optionally heteroatoms;
- in which R9′, R10′ and R11′, each independently of one another, is a C2-C4-alkylene group having an order of the (R9′O), (R10′O) and (R11′O) units in any possible sequence;
- in which R12′ is a C1-C12-alkyl or cycloalkyl radical, a C7-C20-alkylaryl or aralkyl radical, or a substituted or unsubstituted aryl radical;
- in which x′, y′ and z′, independently of one another, each have the values 0-100 and x′+y′+z′=1-100;
- in which m, n, o and p, independently of one another, are numbers, where the sum m+n+o+p=100 and m>0, n>0, o>0 and p≧0;
- and in which the ratio m/(n+o+p) is from 2 to 6.
25 more elements
A binder-containing mixture comprising gypsum and at least one polymer P, the polymer P comprising:
- a) m mol % of at least one structural unit A of the formula (I);
- b) n mol % of at least one structural unit B of the formula (II);
- c) o mol % of at least one structural unit C of the formula (H);
- and optionally
- d) p mol % of at least one further structural unit D;
- in which R1, independently of one another, is H, CH2COOM or an alkyl group having 1 to 5 carbon atoms,
- in which R2, independently of one another, is H, an alkyl group having 1 to 5 carbon atoms, COOM or CH2COOM;
- in which R3, independently of one another, is H, CH3, COOM or CH2COOM;
- and
- in which R4, independently of one another, is COOM;
- or in which R3 and R4 form a ring to give —CO—O—CO—;
- in which M is H, alkali metal, alkaline earth metal, ammonium, ammonium cation or mixtures thereof;
- in which R5, independently of one another, is
- in which R13 is —(R9O)x—(R10O)y—(R11—O)z]—R12;
- in which R9, R10 and R11, each independently of one another, is a C2-C4-alkylene group having an order of the (R9O), (R10O) and (R11O) units in any possible sequence;
- in which R12 is H, a C1-C12-alkyl or cycloalkyl radical, a C7-C20-alkylaryl or aralkyl radical, or a substituted or unsubstituted aryl radical;
- in which x, y and z, independently of one another, each have the values 0-250 and x+y+z=3-250;
- in which R6, independently of one another, is H, CH3, COOM, CH2COOM or a substituent as defined for R5;
- in which R7 and R8, together form a ring which optionally contains oxygen, sulfur or further nitrogen atoms;
- or in which R7 and R8, independently of one another, are H, a C1-C20-alkyl group, a C5-C9-cycloalkyl group, a C7-C12-aralkyl group, a hydroxyalkyl group, or a compound of the formula (IV), (V) or (VI)
- in which R14, independently of one another, is an alkylene group and R15 is a C1- to C4-alkyl group and X, independently of one another, is an S, O or N, where r=1 if X═S or O, or r=2 if X═N;
- in which R16 is an alkylene group having optionally heteroatoms;
- in which R9′, R10′ and R11′, each independently of one another, are a C2-C4-alkylene group having an order of the (R9′O), (R10′O) and (R11′O) units in any possible sequence;
- in which R12′ is a C1-C12-alkyl or cycloalkyl radical, a C7-C20-alkylaryl or aralkyl radical, or a substituted or unsubstituted aryl radical;
- in which x′, y′ and z′, independently of one another, each have the values 0-100 and x′+y′+z′=1-100;
- in which m, n, o and p, independently of one another, are numbers, where m+n+o+p=100 and m>0, n>0, o>0 and p≧0;
- and in which the ratio m/(n+o+p) is from 2 to 6.
24 more elements
Dependencies are inferred from the claim text.