Aqueous polymer dispersion containing an emulsifier with phosphate groups

• US 6,348,528 B1
• Filed: 09/12/2000
• Issued: 02/19/2002
• Est. Priority Date: 03/12/1998
• Status: Expired due to Term

• Current Assignee: BASF AG (BASF SE)
• Original Assignee: BASF AG (BASF SE)
• Inventors: Ley, Gregor, Zhao, Cheng-Le, Dersch, Rolf, Schlarb, Bernhard, Haunschild, Alexander, Rau, Maria Gyopar
• Primary Examiner(s): Michl, Paul R.
• Application Number:
  US09/623,459
• Time in Patent Office: 525 Days
• Field of Search: 524/141
• US Class Current: 524/141
• CPC Class Codes: C08F 2/26 anionic
• CPC Class Codes: C09D 5/027 Dispersing agents anti-settling agents C09D7/45

Abstract

Aqueous polymer dispersion comprising from 0.1 to 10 parts by weight per 100 parts by weight of polymer of an emulsifier A) having a phosphate group, wherein said emulsifier consists at least 50% by weight of ethylene oxide and propylene oxide groups and the proportion of the ethylene oxide groups and propylene oxide groups is in each case at least 10% by weight, based on the overall amount of the ethylene oxide and propylene oxide groups.

Claims

1. An aqueous polymer dispersion comprising from 0.1 to 10 parts by weight per 100 parts by weight of polymer of an emulsifier A) having a phosphate group, wherein said emulsifier consists at least 50% by weight of ethylene oxide and propylene oxide groups and the proportion of the ethylene oxide groups and propylene oxide groups is in each case at least 10% by weight, based on the overall amount of the ethylene oxide and propylene oxide groups, said emulsifier A) having the formula

where

R is C₁-C₁₈-alkyl

x,y,w,z are each an integer from 0 bis 30,

x+w is at least 1

y+z is at least 1

n is 1 or 2

B is a mono- or divalent cation

a,c are each 1 or 2 with a*c=3−

n.

2. A dispersion as claimed in claim 1, wherein the molecular weight of the emulsifier is from 400 to 2000 g/mol.

3. A dispersion as claimed in claim 1, wherein the emulsifier consists at least 10% by weight of ethylene oxide groups and at least 10% by weight of propylene oxide groups.

4. A dispersion as claimed in claim 1, wherein the polymer consists 40 to 100% by weight of principal monomers selected from C₁-C₂₀-alkyl(meth)acrylates, vinyl esters of carboxylic acids of up to 20 carbons, vinylaromatic compounds of up to 20 carbons, ethylenically unsaturated nitrites, vinyl halides, vinyl ethers of alcohols of 1 to 10 carbons, and aliphatic hydrocarbons of 2 to 8 carbons and 1 or 2 double bonds.

5. A method of coating a substrate with a coating composition, comprising applying said coating composition with the dispersion as claimed in claim 1 as a binder for said coating composition.

6. A method for painting a substrate with a paint, comprising painting said substrate with a paint comprising a dispersion as claimed in claim 1 as a binder for said paint.

7. A paint comprising a dispersion as claimed in claim 1.

8. A method for coating a substrate with an anticorrosion coating material, comprising applying said anticorrosion coating material with a dispersion as claimed in claim 1 as a binder in said anticorrosion coating material.

9. An anticorrosion coating material comprising a dispersion as claimed in any of claims 2 to 4 and 1.