Concrete cleaning composition

• US 4,563,483 A
• Filed: 07/06/1983
• Issued: 01/07/1986
• Est. Priority Date: 07/06/1983
• Status: Expired due to Term

• Current Assignee: Creative Products Resource, Inc. (Henkel AG & Co KGaA)
• Original Assignee: Creative Products Resource, Inc. (Henkel AG & Co KGaA)
• Inventors: Smith, James A., Murphy, Betty J.
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US06/511,185
• Time in Patent Office: 916 Days
• Field of Search: 521/111, 521/159, 521/905, 521/122, 521/918, 521/123, 521/76, 210/924
• US Class Current: 521/111
• CPC Class Codes: C08J 2375/04 Polyurethanes
• CPC Class Codes: C08J 2491/00 Characterised by the use of oils, fats or waxes; Derivatives thereof
• CPC Class Codes: C08J 9/0061 characterized by the use of several polymeric components
• CPC Class Codes: C09G 1/02 containing abrasives or grinding agents abrasives as such C09K3/14; polishing of semi-conductors H01L
• CPC Class Codes: C09G 1/10 based on mixtures of wax and natural or synthetic resin
• CPC Class Codes: C11D 17/0013 Liquid compositions with insoluble particles in suspension C11D17/0021, C11D17/0026, C11D17/003 take precedence
• CPC Class Codes: C11D 17/041 Compositions releasably affixed on a substrate or incorporated into a dispensing means
• CPC Class Codes: C11D 3/0031 Carpet, upholstery, fur or leather cleansers
• CPC Class Codes: C11D 3/14 Fillers; Abrasives ; Abrasive compositions; Suspending or absorbing agents not provided for in one single group of C11D3/12; Specific features concerning abrasives, e.g. granulometry or mixtures dyes, pigments C11D3/40
• CPC Class Codes: C11D 3/162 containing Si
• CPC Class Codes: C11D 3/18 Hydrocarbons C11D3/164 takes precedence
• CPC Class Codes: C11D 3/373 containing silicones
• CPC Class Codes: C11D 3/3734 Cyclic silicones
• CPC Class Codes: Y10S 210/924 using physical agent, e.g. sponge, mop
• CPC Class Codes: Y10S 521/905 Hydrophilic or hydrophobic cellular product
• CPC Class Codes: Y10S 521/918 Physical aftertreatment of a cellular product

Abstract

A water and oil absorbant concrete cleaning composition is disclosed comprising shreds of a hydrophilic, open-celled, solids-loaded polyurethane foam. Methods are also disclosed to bind the solids to the cellular foam matrix.

Claims

1. A concrete cleaning composition comprising shreds of a water and oil absorbent hydrophilic, open-celled, polyurethane foam, said foam comprising broken cell walls adhered to a reticulated cell matrix, wherin the cell walls incorporate an aqueous phase and abrasive particles coupled within said walls, and wherein said shreds are obtained from a friable foam bun having a tensile strength of less that about 10 psi.

2. The composition of claim 1 wherein said shreds have a density of about from 0.5-0.1 g/cc and a shred size of about 10-70 mesh.

3. The composition of claim 1 wherein said shreds incorporate about 30-95% by weight of said abrasive particles on a dry weight basis.

4. The composition of claim 1 wherein said abrasive particles are coupled to said foam with an effective amount of a silane-coupling agent.

5. The composition of claim 1 wherein the aqueous phase comprises a surfactant and a dispersed nonpolar solvent.

6. The composition of claim 5 wherein the surfactant is a nonionic surfactant and the solvent is a hydrocarbon solvent.

7. The composition of claim 1 wherein said foam shreds substantially have a structure selected from those shown in FIGS. 1-4.

24. A method of removing oil from concrete comprising applying to the oil the composition of claim 1.

8. A process for preparing an oil and water absorbent concrete cleaning composition comprising:

(a) forming an aqueous reactant phase comprising about 25-60% by weight of abrasive solid particles, about 0.1-5% of the weight of the solid particles of a silane-coupling agent, about 0.1-10% of a nonionic surfactant and about 20-50% water;

(b) mixing said aqueous reactant phase with a water-foamable prepolymer resin which contains at least 2 free isocyanate groups per resin molecule so that the final mole ratio of water to total free isocyanate groups is within the range of about 5-100;

1, thereby converting said resin into a hydrophilic, open-celled, highly reticulated polyurethane foam bun; and

(c) shredding said foam bun.

9. The process of claim 8 wherein said shredded foam has a density of about 0.5-0.1 g/cc and a shred size of about 10-70 mesh.

10. The process of claim 8 wherein the aqueous reactant phase further comprises about 1-10% by weight of a silicone fluid and about 0.5-5% by weight of an anionic surfactant.

11. The process of claim 10 wherein the aqueous phase further comprises about 1-15% of a hydrocarbon solvent.

12. The process of claim 8 wherein said aqueous reactant phase is formed by slurrying the solid particles with about half of the water, adding the silane-coupling agent, stirring and heating the water phase to 70°

-80°

F. and adding the surfactant and the remainder of the water.

13. The process of claim 8 wherein the solid particles comprise silaceous mineral particles and said silane-coupling agent is an aminoalkyl(tris-alkoxy)silane.

14. A process for preparing an oil and water absorbent concrete cleaning composition comprising:

(a) forming an aqueous reactant phase comprising about 15-40% by weight of water, about 0.1-10% of a nonionic surfactant, about 0.5-5% by weight of an anionic surfactant, about 1-10% by weight of a polysiloxane silicone fluid, about 1-15% of a hydrocarbon solvent, about 25-60% of abrasive mineral particles, and about 0.1-5% by weight of the mineral particles of an aminoalkyl(tris-alkoxy)silane-coupling agent;

(b) mixing said aqueous reactant phase with a water-foamable prepolymer resin in a weight ratio of aqueous phase to prepolymer of about 20-1;

1, said prepolymer resin comprising a toluene diisocyanate-capped polyalkoxylene ether polyol having a molecular weight within the range of about 1300-1400 and comprising about 1.5-2.5 mEq/g of isocyanate groups, so as to convert such resin into a hydrophilic, open-celled, friable polyurethane foam bun having a tensile strength of less than about 10 psi; and

(c) shredding said bun into foam shreds having a density of about 0.5-0.1 g/cc.

15. The process of claim 14 wherein the nonionic surfactant comprises the condensation product of a polyoxypropylene ether and polyoxyethylene ether wherein the polyoxypropylene ether has a molecular weight of about 1500-3000 and the polyoxyethylene content is about 35-55% by weight of the surfactant molecule, and wherein the anionic surfactant comprises an alkali metal salt of sulfated ethylenoxy-derivatized fatty alcohols.

16. The process of claim 14 wherein the weight range of aqueous phase to prepolymer resin is about 10-2:

1, and wherein the abrasive mineral particles comprise about 45-55% by weight of the aqueous phase.

17. A cleaning composition prepared according to the process of claim 14 wherein the foam shreds substantially have a structure selected from those shown in FIGS. 1-4.

18. A method for dispersing a solid particulate material having surface hydroxyl groups in a hydrophilic polyurethane foam matrix comprising:

(a) forming an aqueous slurry of said particulate material in water;

(b) treating said slurry with about 0.1-5% by weight of the particulate material of a silane-coupling agent comprising amino or ureido groups and functional groups which are converted to silanol groups upon hydrolysis;

(c) heating the slurry to a temperature effective to hydrolyze said functional groups and to bind said silanol groups to said surface hydroxyl groups;

(d) mixing said slurry with a foamable prepolymer resin comprising free isocyanate groups whereby said amino groups couple with said isocyanate groups; and

(e) foaming said resin to form a polyurethane foam.

19. The method of claim 18 wherein the silane-coupling agent has the formula:

space="preserve" listing-type="equation">RCH.sub.2 CH.sub.2 CH.sub.2 [NH(CH.sub.2).sub.n ].sub.m SiX.sub.3

wherein R is an amino or ureido group, n is 1 or 2, m is 0-3 and X is selected from the group consisting of methoxy, ethoxy, 2-methoxyethoxy and acetoxy.

20. The method of claim 18 wherein the particulate material comprises a powdered silicate or aluminate mineral.

21. The method of claim 18 wherein the resin comprises an aromatic isocyanate-capped mixture of a polyol comprising about 3-8 hydroxy groups and a polyoxyethylene diol, said resin having a molecular weight of about 1300-1400 and having about 1.5-2.5 mEq/g of free isocyanate groups.

22. The method of claim 20 wherein the aqueous slurry comprises up to about a 500% weight excess of particulate material over the total weight of the water used.

23. The method of claim 18 wherein the slurry is heated to about 70°

-90°

F. to hydrolyze the functional groups to silanol groups.