Metal phosphinates as smoke retardants for polyvinyl halides
AssigneePennwalt Corporation
InventorStanley R. Sandler
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Abstract
A smoke-retardant polymer composition composed of an admixture of a polyvinyl halide resin and a metal phosphinate having one, two, three or four phosphinate groups per coordination center.
Claims11
A smoke-retardant polymer composition comprising a polyvinyl halide resin admixed with a sufficient amount to reduce smoking of a metal phosphinate having one, two, three or four phosphinate groups per coordination center and selected from the respective formulae:
- a. MX, MaX Ma.sub.2 X, Ma.sub.3 X, M(AA)X, M(AA).sub.2 X,
- b. MX.sub.2, MaX.sub.2, Ma.sub.2 X.sub.2, MabX.sub.2, M(AA)X.sub.2,
- c. MX.sub.3, MaX.sub.3, Ma.sub.2 X.sub.3, MabX.sub.3, M(AA)X.sub.3 or
- d. MX.sub.4
- wherein
- M is a metal selected from the group consisting of beryllium, magnesium, calcium, strontium, barium, titanium, zirconium, antimony, bismuth, chromium, molybdenum, tungsten, manganese, iron, ruthenium, cobalt, rhodium, iridium, nickel, palladium, platinum, copper, silver, zinc, cadmium, mercury, aluminum, tin, lead and mixtures thereof.
- X is a phosphinate group having the structure ##STR5## wherein R and R.sub.1 are independently selected from the group consisting of an aliphatic group of 1 to 20 carbons, a cycloaliphatic group of 3 to 20 carbons, an aromatic group of 6 to 12 carbons and said aliphatic, cycloaliphatic or aromatic group can have a substituted group thereon, the substituted group being selected from the class consisting of a halogen, ether, hydroxyl, alkoxyl, ketone and ester;
- R can also be hydrogen;
- a and b are independent unidentate groups selected from the class consisting of oxy, alkoxy, hydroxyl and halide;
- and
- Aa is a bidentate ligand selected from the group consisting of acetylacetonate picolinate, 8-hydroxyquinolinate, dimethylglyoximate and glycinate.
A process of preparing a smoke retardant polyvinyl halide resin comprising mixing a polyvinyl halide resin with a sufficient amount to reduce smoking of a metal phosphinate having one, two, three or four phosphinate groups per coordination center and selected from the respective formulae:
- a. MX, MaX, Ma.sub.2 X, Ma.sub.3 X, M(AA)X, M(AA).sub.2 X,
- b. MX.sub.2 , MaX.sub.2, Ma.sub.2 X.sub.2, MabX.sub.2, M(AA)X.sub.2,
- c. MX.sub.3, MaX.sub.3, Ma.sub.2 X.sub.3, MabX.sub.3, M(AA)X.sub.3 or
- d. MX.sub.4
- wherein
- M is a metal selected from the group consisting of beryllium, magnesium, calcium, strontium, barium, titanium, zirconium, antimony, bismuth, chromium, molybdenum, tungsten, manganese, iron, ruthenium, cobalt, rhodium, iridium, nickel, palladium, platinum, copper, silver, zinc, cadmium, mercury, aluminum, tin, lead and mixtures thereof.
- X is a phosphinate group having the structure ##STR6## wherein R and R.sub.1 are independently selected from the group consisting of an aliphatic group of 1 to 20 carbons, a cycloaliphatic group of 3 to 20 carbons, an aromatic group of 6 to 12 carbons and said aliphatic, cycloaliphatic or aromatic group can have a substituted group thereon the substituted group being selected from the class consisting of a halogen, ether, hydroxyl, alkoxyl, ketone and ester;
- R can also be hydrogen;
- a and b are independent unidentate groups selected from the class consisting of oxy, alkoxy, hydroxyl and halide;
- and
- Aa is a bidentate ligand selected from the group consisting of acetylacetonate, picolinate, 8-hydroxyquinolinate, dimethyl glyoximate and glycinate.
Dependencies are inferred from the claim text.