# US 4,394,283 A · Stable ice release agent

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- Number: US 4,394,283 A
- Document ID: US4394283A
- Status: Granted
- Kind: A
- Application number: 06/255,524
- Filed: 1981-04-20
- Granted: 1983-07-19
- Earliest claimed: 1981-04-20
- Inventors: Lorenzo Spratt
- Web page: https://patentgrep.com/patent/US4394283A

## CPC

- C09K 3/185: {Thawing materials}
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

An aerosol foam composition for inhibiting the bonding of ice precipitates to a substrate comprises propylene glycol mixed with propylene glycol monostearate. The composition is preferably dispensed by spraying from a sealed container which is pressurized by a propellant.

## Claims

### Claim 1

In a pressurized container which is provided with a spray valve, an ice release composition consisting of propylene glycol mixed with propylene glycol monostearate and water and a propellant.

### Claim 2 (depends on 1)

The combination as defined in claim 1, said ice release composition including de-ionized water.

### Claim 3

A method for inhibiting the bonding of ice precipitates to a substrate comprising the step of applying directly to the substrate a layer of an ice release composition consisting of propylene glycol mixed with propylene glycol monostearate and water wherein said ice release composition is applied to said substrate from a pressurized sealed container which contains said ice release composition and a propellant.

### Claim 4 (depends on 1)

The ice release composition of claim 1 wherein the ratio of glycol to water is in the range of about 20:80 to about 90:10.

### Claim 5 (depends on 1)

The ice release composition of claim 1 wherein the ratio of propylene glycol monostearate to the propylene glycol water mixture is in the range of about 0.5:100 to about 1:100.