# US 4,400,313 A · Process for waste encapsulation

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- Number: US 4,400,313 A
- Document ID: US4400313A
- Status: Granted
- Kind: A
- Application number: 06/164,424
- Filed: 1980-06-30
- Granted: 1983-08-23
- Earliest claimed: 1980-06-30
- Assignees: The Dow Chemical Company
- Inventors: Keith Roberson; Harold E. Filter
- Web page: https://patentgrep.com/patent/US4400313A

## CPC

- G21F 9/307: {in polymeric matrix, e.g. resins, tars}
- G21F 9/167: {in polymeric matrix, e.g. resins, tars}
- G21F: PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR (radiation protection by pharmaceutical means A61K8/00, A61Q17/04; in cosmonautic vehicles B64G1/54; combined with a reactor G21C11/00; combined with X-ray tubes H01J35/16; combined with X-ray apparatus H05G1/02)

## Abstract

An improvement in the process of encapsulating waste materials in aqueous liquid or finely divided, dry solid form, in liquid thermosettable resins of the group consisting of vinyl ester resins, unsaturated polyester resins, and mixtures thereof, which comprises increasing the amount of waste material incorporated in a given amount of resin by adding thereto a water-soluble polymeric substance containing a carbon chain having a plurality of --COOH groups or derivatives thereof.

## Claims

### Claim 1

In the process of encapsulating dry solids and aqueous wastes in liquid thermosettable resins of the group consisting of vinyl ester resins, unsaturated polyester resins and mixtures thereof, wherein the waste is dispersed in the resin, the improvement which comprises incorporating in the waste-resin dispersion a water-soluble copolymer of a 1-olefin containing 4 to 16 carbon atoms and a compound selected from the group consisting of ##STR3## where each R is individually selected from the group consisting of hydrogen, methyl and ethyl and X is individually selected from the group consisting of hydrogen, methyl, ethyl, propyl, butyl, ammonium and an alkali metal, said copolymer being present in an amount sufficient to increase the amount of waste encapsulated in a given amount of resin.

### Claim 2 (depends on 1)

The process of claim 1 wherein the compound selected from the group is ##STR4##

### Claim 3 (depends on 2)

The process of claim 2 wherein R is the compound selected from the group is hydrogen.

### Claim 4 (depends on 3)

The process of claim 3 wherein the 1-olefin is diisobutylene.

### Claim 5 (depends on 2)

The process of claim 2 wherein the 1-olefin contains from 6 to 10 carbon atoms.

### Claim 6

In the process of encapsulating aqueous liquid wastes in liquid thermosettable resins of the group consisting of vinyl ester resins, unsaturated polyester resins and mixtures thereof, wherein the liquid waste is dispersed in the resin, the improvement which comprises incorporating in the waste-resin dispersion a water-soluble copolymer of a 1-olefin containing 4 to 16 carbon atoms and an anhydride having the formula ##STR5## wherein each R is individually selected from the group consisting of hydrogen, methyl and ethyl, said copolymer having a molecular weight of from about 500 to 10,000, and is present in an amount sufficient to increase the amount of waste encapsulated in a given amount of resin.

### Claim 7 (depends on 6)

The process as defined in claim 6 wherein the 1-olefin contains from 6 to 10 carbons and the resulting copolymer has a molecular weight of from about 800 to 3,000.

### Claim 8 (depends on 6)

The process as defined in claim 6 wherein the water-soluble copolymer is the sodium salt thereof, the 1-olefin is diisobutylene and the copolymer has a molecular weight of from about 800 to 3,000.

### Claim 9 (depends on 8)

The process as defined in claim 8 wherein the water-soluble sodium salt is a copolymer of maleic anhydride and diisobutylene.

### Claim 10 (depends on 9)

The process as defined in claim 9 wherein the copolymer is present in an amount varying from about 0.2 to about 5% by weight based on the weight of the resin.

### Claim 11 (depends on 6)

The process as defined in claim 6 wherein the water-soluble copolymer is the ammonium salt thereof, the 1-olefin is diisobutylene and the copolymer has a molecular weight of from about 800 to 3000.

### Claim 12 (depends on 11)

The process as defined in claim 11 wherein the water-soluble ammonium salt is a copolymer of maleic anhydride and diisobutylene.

### Claim 13 (depends on 6)

The process as defined in claim 6 wherein the water-soluble copolymer is present in an amount varying from about 0.06% to about 8% by weight based on the weight of resin.