# US 5,702,521 A · Air-entrained concrete with lignin-containing air-entraining agent

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- Number: US 5,702,521 A
- Document ID: US5702521A
- Status: Granted
- Kind: A
- Application number: 08/728,026
- Filed: 1996-10-09
- Granted: 1997-12-30
- Earliest claimed: 1995-06-07
- Assignees: Hercules Incorporated
- Inventors: Richard Robert Suchanec
- Web page: https://patentgrep.com/patent/US5702521A

## CPC

- C08L 97/005: {Lignin}
- C07G 1/00: Low-molecular-weight derivatives of lignin (high-molecular-weight derivatives of lignin {C08H6/00})
- C08L 93/04: Rosin
- C08L 95/00: Compositions of bituminous materials, e.g. asphalt, tar, pitch
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C07G: COMPOUNDS OF UNKNOWN CONSTITUTION (sulfonated fats, oils or waxes of undetermined constitution C07C309/62)

## Abstract

Resinous compositions comprising lignin and polymerized rosin. Use of salts of the resinous compositions as concrete air-entraining agents and asphalt emulsifiers.

## Claims

### Claim 1

Air-entrained concrete containing an air-entraining agent comprising alkali metal salt of lignin and alkali metal salt of polymerized rosin.

### Claim 2 (depends on 1)

The air-entrained concrete of claim 1 wherein the air-entraining agent further comprises alkali metal salt of added rosin acids.

### Claim 3 (depends on 1)

The air-entrained concrete of claim 1 wherein the alkali metal salt of lignin and the alkali metal salt of polymerized rosin are salts alkali metal selected from the group consisting of lithium, sodium, and potassium.

### Claim 4 (depends on 2)

The air-entrained concrete of claim 2 wherein the alkali metal salt of lignin, the alkali metal salt of polymerized rosin and the alkali metal salt of added rosin acids are salts of alkali metal selected from the group consisting of lithium, sodium, and potassium.

### Claim 5 (depends on 1)

The air-entrained concrete of claim 1 wherein the alkali metal salt of lignin and the alkali metal salt of polymerized rosin are salts of sodium.

### Claim 6 (depends on 2)

The air-entrained concrete of claim 2 wherein the alkali metal salt of lignin, the alkali metal salt of polymerized rosin and the alkali metal salt of added rosin acids are salts of sodium.

### Claim 7 (depends on 1)

The air-entrained concrete of claim 1 wherein the polymerized rosin comprises about 30 to 90 wt. percent rosin acid dimer.

### Claim 8 (depends on 2)

The air-entrained concrete of claim 2 wherein the added rosin acids comprise rosin acids obtained by stripping off monomeric resin acids from a polymerized rosin by distillation.

### Claim 9 (depends on 2)

The air-entrained concrete of claim 2 wherein the added rosin acids comprise from the 60% to about 70% dehydroabietic acid.

### Claim 10 (depends on 1)

The air-entrained concrete of claim 1 wherein the lignin is organosolv lignin.

### Claim 11 (depends on 1)

The air-entrained concrete of claim 1 wherein the ration of alkali metal salt of lignin to alkali metal salt of polymerized on a weight basis is from about 0.8 to about 2.3.

### Claim 12 (depends on 9)

The air-entrained concrete of claim 9 wherein the ration of alkali metal salt of lignin to alkali metal salt of polymerized on a weight basis is from about 1 to about 2.

### Claim 13 (depends on 10)

The air-entrained concrete of claim 10 wherein the ratio of alkali metal salt of lignin to alkali metal salt of polymerized on a weight basis is from about 1.5 to about 2.

### Claim 14 (depends on 2)

The air-entrained concrete of claim 2 wherein the ratio of alkali metal salt of added rosin acids to the total of alkali metal salt of lignin and alkali metal salt of polymerized rosin on a weight basis is no greater than about 0.25.

### Claim 15 (depends on 10)

The air-entrained concrete of claim 10 wherein the ratio of alkali metal salt of added rosin acids to the total of alkali metal salt of lignin and alkali metal salt of polymerized rosin on a weight basis is from about 0.05 to about 0.2.

### Claim 16 (depends on 11)

The air-entrained concrete of claim 11 wherein the ratio of alkali metal salt of added rosin acids to the total of alkali metal salt of lignin and alkali metal salt of polymerized rosin on a weight basis is from about 0.05 to about 0.15.

### Claim 17 (depends on 2)

The air-entrained concrete of claim 2 wherein the ratio of alkali metal salt of lignin to alkali metal salt of polymerized rosin on a weight basis is from about 1.5 to about 2, and the ration of alkali metal salt of added rosin acids to the total of alkali metal salt of lignin and alkali metal salt of polymerized rosin is from about 0.05 to about 0.15.

### Claim 18 (depends on 3)

The air-entrained concrete of claim 3 wherein the lignin is organosolv lignin and the added rosin acids comprise rosin acids obtained by stripping off the monomeric rosin acids from a polymerized rosin by distillation.