# US 4,400,476 A · Paint adhesion for RIM parts

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- Number: US 4,400,476 A
- Document ID: US4400476A
- Status: Granted
- Kind: A
- Application number: 06/358,402
- Filed: 1982-03-15
- Granted: 1983-08-23
- Earliest claimed: 1982-03-15
- Assignees: Air Products and Chemicals, Inc.
- Inventors: Ibrahim S. Bechara; Rocco L. Mascioli
- Web page: https://patentgrep.com/patent/US4400476A

## CPC

- C08G 18/1875: {containing ammonium salts or mixtures of secondary of tertiary amines and acids}
- C08J 7/0427: {with only one layer of a composition containing a polymer binder (with more layers C08J7/042)}
- C08J 7/043: Improving the adhesiveness of the coatings per se, e.g. forming primers (adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50)
- C08J 7/05: Forming flame retardant coatings or fire resistant coatings
- C08J 9/0014: {Use of organic additives}
- C08K 5/02: Halogenated hydrocarbons {(C08K5/0091 takes precedence)}
- C08K 5/05: Alcohols; Metal alcoholates
- C08J 2375/04: Polyurethanes
- C08J 2461/00: Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
- Y10S 264/83: Injection molding of polyolefin-type foam
- Y10S 521/906: Polyurethane cellular product containing unreacted flame-retardant material
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

The addition of a small amount of a halogen compound, e.g. chloroethyl phosphate, in a process producing elastomeric polyurethane RIM parts using tertiary amines as the chief catalyst component results in scavenging the residual amines after the part has been cured by annealing. The parts from such a process can be coated with a wide variety of enamels having a high solids content and completely cured to result in a higher degree of adhesive between the coating and the part's surface than those parts from a process without the use of such a halogen.

## Claims

### Claim 1

An elastomeric composition for the production of RIM polyurethane products comprising per hundred parts of polyether polyol therein:
10 to 50 parts of a diol chain extender;
50 to 300 parts polyisocyanate;
0 to 4 parts of volatile fluorocarbon blowing agent,
0.1 to 1.0 parts of tertiary amine catalyst; and 0 to 0.2 parts of organo tin catalyst; together with 0.1 to 3 parts of a reactive organic halogen compound.

### Claim 2 (depends on 1)

An elastomeric composition as defined in claim 1 wherein said tertiary amine catalyst is a ditertiary amine.

### Claim 3 (depends on 1)

An elastomeric composition as defined in claim 1 wherein said tertiary amine is triethylenediamine.

### Claim 4 (depends on 1)

An elastomeric composition as defined in claim 1 containing 0.1 to 1.0 parts of triethylenediamine and 0.01 to 0.04 parts of organo-tin catalyst.

### Claim 5 (depends on 1, 3)

An elastomeric composition as defined in claim 1 or 3 wherein said organic halogen compound is a chlorophosphate.

### Claim 6 (depends on 1, 3)

An elastomeric composition as defined in claim 1 or 3 wherein said organic halogen compound is tris(chloroethyl)phosphate.