# US 4,397,977 A · Tetrahalophthalates as flame retardant plasticizers for halogenated resins

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- Number: US 4,397,977 A
- Document ID: US4397977A
- Status: Granted
- Kind: A
- Application number: 06/262,099
- Filed: 1981-05-11
- Granted: 1983-08-09
- Earliest claimed: 1978-12-22
- Assignees: Pennwalt Corporation
- Inventors: Stanley R. Sandler
- Web page: https://patentgrep.com/patent/US4397977A

## CPC

- C08K 5/12: of cyclic polycarboxylic acids
- C08K 5/20: Carboxylic acid amides
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

A flame retarded composition containing tetrahalophthalate plasticizer and a halogenated resin is provided.

## Claims

### Claim 1

The process of smoke and flame retarding and plasticizing halogenated resins comprising adding to a halogenated resin, 1 to 100 parts per hundred parts of resin of a plasticizer of the structure: ##STR17## wherein (a) the ring can have all possible isomeric arrangements;
(b) R is selected from the group consisting of hydrogen, an alkyl of 1 to 10 carbons, and polyhydroxyalkyl of 3 to 10 carbons;
(c) R.sup.1 is selected from the group consisting of a hydrogen, an alkyl or a substituted alkyl of 1 to 12 carbons, or ##STR18## (d) R.sup.2 is independently selected from the class consisting of H and CH.sub.3 --;
(e) p is an integer of 4 to 50;
(f) x is selected from O or NH; and
(g) A is selected from Cl or Br so as to form a uniform composition.

### Claim 2 (depends on 1)

The process of claim 1 wherein a mixture of the halogenated resin and plasticizer is hot milled at 260.degree.-350.degree. F. for 1-4 minutes after fusion to form a uniform composition and the milled sheets are pressed at 360.degree.-370.degree. F. at 2000 to 3000 psi for 20 to 60 seconds.

### Claim 3 (depends on 1)

The process of claim 1 wherein the halogenated resin is PVC or its copolymer.

### Claim 4 (depends on 1)

The process of claim 1 wherein one or more of plasticizers, fillers, antimony oxide, stabilizers and smoke suppressants are present.

### Claim 5 (depends on 1)

The process of claim 1 wherein the halogenated resin is chlorosulfonated polyethylene.