Polyether-containing copolymer

Abstract

Copolymers include two monomer components, a) an olefinic unsaturated monocarboxylic acid comonomer or an ester or a salt thereof of an olefinic unsaturated sulfuric acid comonomer or a salt thereof, and b) an ether comonomer of the general formula (I) Components a) and b) are present in amounts of from 30 to 90 mol-% and from 70 to 10 mol-%, respectively, and comonomer component a) is selected from the group consisting of acrylic acid, methacrylic acid, crotonic acid, isocrotonic acid, allylsulfonic acid, vinylsulfonic acid and a salt thereof or an alkyl or hydroxyalkyl ester. Compositions including a hydraulic binder such as cement, gypsum, lime and anhydrite and the copolymer are also disclosed. The copolymer can be used as superplasticizer or dispersant for non-hardened (wet) and a hydraulic binder containing compositions.

1 - 16 . (canceled)  
   
   
       17 . A copolymer comprising two monomer components, wherein component: a) is an olefinic unsaturated monocarboxylic acid comonomer or an ester or a salt thereof or an olefinic unsaturated sulfuric acid comonomer or a salt thereof, and component b) is a comonomer of the general formula (I)  
     
       
         
         
             
             
         
       
     
     wherein R 1  is  
     
       
         
         
             
             
         
       
     
     and wherein R 2  is H or an aliphatic hydrocarbon group having from 1 to 5 carbon atoms, R 3  is a non-substituted or substituted aryl group and preferably phenyl, and R 4  is H or an aliphatic hydrocarbon group having from 1 to 20 carbon atoms, a cycloaliphatic hydrocarbon group having from 5 to 8 carbon atoms, a substituted aryl group having from 6 to 14 carbon atoms or a compound selected from the group  
     
       
         
         
             
             
         
       
     
     wherein R 5  and R 7  may each be an alkyl, aryl, aralkyl or alkaryl group and R 6  may be an alkyliden, aryliden, aralkyliden or alkaryliden group and p=0 to 3, m, n=2 to 4, x and y are independently and integer from 55 to 350, and z=0 to 200.  
   
   
       18 . The copolymer of  claim 17 , comprising from 30 to 99 mol-% of comonomer component a) and from 70 to 1 mol-% of said ether component b).  
   
   
       19 . The copolymer of  claim 17 , wherein the amount of said comonomer component a) is from 40 to 90 mol-% and the amount of said comonomer component b) is from 60 to 10 mol-%.  
   
   
       20 . The copolymer of  claim 17  wherein said comonomer component a) is an acrylic acid or a salt thereof and the said ether component b) with p=0 or 1 represents an allyl or vinyl group and additionally contains a polyether.  
   
   
       21 . The copolymer of  claim 17 , wherein said comonomer component a) is selected from the group consisting of acrylic acid, methacrylic acid, croton acid, isocrotonic acid, allylsulfonic acid, vinylsulfonic acid and salts thereof and alkyl or hydroxyalkyl esters thereof.  
   
   
       22 . The copolymer of  claim 17  wherein the copolymer comprises an additional structural group in copolymerized form.  
   
   
       23 . The copolymer of  claim 22 , wherein said additional structural group is selected from the group consisting of a styrene, an acrylamide, a hydrophobic compound, and an ester, polypropylene oxide, and polypropylene oxide/polyethylene oxide.  
   
   
       24 . The copolymer of  claim 22 , wherein the additional structural group is present in an amount of up to 5 mol-%.  
   
   
       25 . The copolymer of  claim 17 , wherein formula (I) is an allyl or vinyl group containing polyether.  
   
   
       26 . The copolymer of  claim 17 , wherein the copolymer is a powder.  
   
   
       27 . A hydraulic binder containing composition comprising a hydraulic component and the copolymer of  claim 17 .  
   
   
       28 . The composition of  claim 27  wherein the hydraulic binder is selected from the group consisting of cement, gypsum, lime, and anhydrite.  
   
   
       29 . A method comprising adding the copolymer of  claim 17  as a superplasticizer to a non-hardened (wet) and a hydraulic binder containing composition.  
   
   
       30 . The method of  claim 24 , wherein the copolymer is added as superplasticizer in amounts from 0.01 to 10.0% by weight, preferably in amounts from 0.05 to 5.0% by weight, wherein the amounts are relating to the weight of the binder component.  
   
   
       31 . The method of  claim 24 , wherein the copolymer is used in combination with a defoaming component.  
   
   
       32 . The method of  claim 31  wherein the copolymer comprises the defoaming agent as additional structural unit.  
   
   
       33 . The composition of  claim 28 , wherein the hydraulic binder comprises calcium sulfate.