Hydrophobic cementitious composition

• US 9,206,082 B2
• Filed: 06/25/2012
• Issued: 12/08/2015
• Est. Priority Date: 06/29/2011
• Status: Active Grant

• Current Assignee: Dow Global Technologies LLC (Dow, Inc.)
• Original Assignee: Dow Global Technologies LLC (Dow, Inc.)
• Inventors: Baumann, Robert
• Primary Examiner(s): Mulcahy, Peter D
• Application Number:
  US13/531,782
• Publication Number:
  US 20130005864A1
• Time in Patent Office: 1,261 Days
• US Class Current: 1/1
• CPC Class Codes: C04B 14/06 Quartz; Sand
• CPC Class Codes: C04B 14/28 of calcium
• CPC Class Codes: C04B 2103/65 Water proofers or repellants
• CPC Class Codes: C04B 2111/27 Water resistance, i.e. waterproof or water-repellent materials
• CPC Class Codes: C04B 24/04 Carboxylic acids; Salts, anhydrides or esters thereof
• CPC Class Codes: C04B 24/2641 Polyacrylates; Polymethacrylates
• CPC Class Codes: C04B 24/2676 Polystyrenes
• CPC Class Codes: C04B 24/383 Cellulose or derivatives thereof
• CPC Class Codes: C04B 28/04 Portland cements
• CPC Class Codes: C08K 5/098 Metal salts of carboxylic acids

Abstract

The invention relates to a cementitious composition that can effectively reduce the adsorption of water, which comprises a) at least one polymer that is the polymerization product of one or more ethylenically unsaturated monomers, in the form of their polymer dispersions and water-redispersible polymer powders; and b) at least one alkyl and/or alkenyl substituted dicarboxylic acids or anhydrides.

Claims

1. A hydrophobic cementitious composition comprising

a) at least one polymer that is the polymerization product of on one or more ethylenically unsaturated monomers, in the form of a water redispersible polymer powder;

and

b) at least one alkyl and/or alkenyl substituted dicarboxylic acids or anhydrides.

2. The hydrophobic cementitious composition according to claim 1 wherein the ethylenically unsaturated monomers are selected from the group consisting of vinyl esters of optionally branched C_1-18 alkylcarboxylic acids, (meth)acrylic esters of optionally branched C_1-18 alcohols or C_2-18 diols, dienes, olefins, vinylaromatics, and vinyl halides.

3. The hydrophobic cementitious composition according to claim 2 wherein the vinyl esters are vinyl acetate, vinyl propionate, vinyl butyrate, vinyl 2-ethylhexanoate, vinyl laurate, 1-methylvinyl acetate, vinyl pivalate, and vinyl esters of α

-branched C_9-13 monocarboxylic acids.

4. The hydrophobic cementitious composition according to claim 1 wherein the polymer is further a copolymerization product of from 0.1 to 50% by weight of auxiliary monomers, based on the total weight of the monomer mixture used to make the polymer.

5. The hydrophobic cementitious composition according to claim 4 wherein the auxiliary monomers are ethylenically unsaturated mono- and/or dicarboxylic acids.

6. The hydrophobic cementitious composition according to claim 1 wherein the alkyl substituted dicarboxylic acids have from 3 to 20 carbon atoms on their alkyl chain.

7. The hydrophobic cementitious composition according to claim 1 wherein the compound b) is an alkenyl substituted dicarboxylic acid or anhydride which is a succinic acid or anhydride having the following formula (I) or formula (II):

8. The hydrophobic cementitious composition according to claim 7 wherein the alkenyl substituted dicarboxylic acids or anhydrides are salts of octenyl succinic acids.

9. The hydrophobic cementitious composition according to claim 8 wherein the alkenyl substituted succinic acids and anhydrides are selected from the group consisting of sodium salt of dodecenyl succinic acid, potassium salt of dodecenyl succinic acid, and the combination thereof.