Plastic article having flame retardant properties

• US 6,110,559 A
• Filed: 09/23/1994
• Issued: 08/29/2000
• Est. Priority Date: 11/07/1991
• Status: Expired due to Fees

• Current Assignee: Ferro Corporation (Vibrantz Technologies, Inc.)
• Original Assignee: Solutia Incorporated (Eastman Chemical Company)
• Inventors: De Keyser, Fran.cedilla.ois
• Primary Examiner(s): MORRIS, TERREL H
• Application Number:
  US08/311,242
• Time in Patent Office: 2,167 Days
• Field of Search: 428/68, 428/71, 428/76, 428/304.4, 428/913, 428/920, 524/100, 524/416, 524/101, 524/140, 523/179, 523/206
• US Class Current: 428/68
• CPC Class Codes: B32B 1/08 Tubular products
• CPC Class Codes: B32B 2307/3065 Flame resistant or retardant, fire resistant or retardant
• CPC Class Codes: B32B 2307/718 Weight, e.g. weight per square meter
• CPC Class Codes: B32B 2323/043 HDPE, i.e. high density polyethylene
• CPC Class Codes: B32B 2323/046 LDPE, i.e. low density polyethylene
• CPC Class Codes: B32B 2597/00 Tubular articles, e.g. hoses, pipes
• CPC Class Codes: B32B 27/065 of foam
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/18 characterised by the use of special additives
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 5/18 characterised by features of a layer of foamed material
• CPC Class Codes: C09K 21/12 containing phosphorus
• CPC Class Codes: Y10S 428/913 Material designed to be responsive to temperature, light, moisture
• CPC Class Codes: Y10S 428/92 Fire or heat protection feature
• CPC Class Codes: Y10S 428/921 Fire or flameproofing
• CPC Class Codes: Y10T 428/1345 Single layer [continuous layer]
• CPC Class Codes: Y10T 428/1352 Polymer or resin containing [i.e., natural or synthetic]
• CPC Class Codes: Y10T 428/1376 Foam or porous material containing
• CPC Class Codes: Y10T 428/1393 Multilayer [continuous layer]
• CPC Class Codes: Y10T 428/23 Sheet including cover or casing
• CPC Class Codes: Y10T 428/233 : Foamed or expanded material encased
• CPC Class Codes: Y10T 428/239 : Complete cover or casing
• CPC Class Codes: Y10T 428/249953 : Composite having voids in a component [e.g., porous, cellular, etc.]
• CPC Class Codes: Y10T 428/249954 : With chemically effective material or specified gas other than air, N, or carbon dioxide in void-containing component
• CPC Class Codes: Y10T 428/249991 : Synthetic resin or natural rubbers
• CPC Class Codes: Y10T 428/249992 : Linear or thermoplastic
• CPC Class Codes: Y10T 428/31938 : Polymer of monoethylenically unsaturated hydrocarbon

Abstract

New plastic articles are disclosed and claimed having flame retardant properties which contain a core of a plastic polymeric material (thermoplastic, thermoset, rigid foam or semi-flexible foam polymeric material) which is coated with a protective, flame retardant layer comprising a mixture of a thermoplastic polymeric material and a flame retardant, char-forming, intumescent system. The new articles are suitable for the manufacture of e.g. rods, beams, pipes, hoses, non-tubular profiles and panels which are useful in various industries such as the building, automotive and mining industries.

Claims

1. A flame retardant plastic article consisting essentially of a core of plastic polymeric material having coated thereon a protective, flame retardant layer, the protective flame retardant layer consisting essentially of (i) a thermoplastic polymeric material selected from the group consisting of a polyolefin and blends of polyolefins and (ii) a flame retardant, char-forming, intumescent system containing a flame retardant, char-forming, intumescent additive and a catalyst selected from the group consisting of a phosphoric acid precursor, a polyphosphoric acid precursor, and combinations of the phosphoric acid precursor and the polyphosphoric acid precursor.

2. The plastic article according to claim 1 wherein the plastic polymeric material of the core comprises a thermoplastic polymeric material.

3. The plastic article according to claim 1 wherein the plastic polymeric material of the core comprises a thermoset polymeric material.

4. The plastic article according to claim 1 wherein the plastic polymeric material of the core comprises a rigid foam or semi-flexible foam polymeric material.

5. The plastic article according to claim 1 wherein the plastic polymeric material of the core further comprises a reinforcement material.

6. The plastic article according to claim 1 wherein the thermoplastic polymeric material of the protective, flame retardant layer is halogen-free.

7. The plastic article according to claim 1 wherein the polyolefin is selected from the group consisting of polyethylene, HDPE, LDPE, polypropylene, and any mixture thereof.

8. The plastic article according to any one of claims 1-3, 5-6, and 7 wherein the article is a pipe.

9. The plastic article according to any one of claims 1-3, 5-6, and 7 wherein the article exhibits a non-tubular profile.

10. The plastic article according to any one of claims 4-6 and 7 wherein the article is a laminate.