Stabilized, halogen-containing resin composition, and composite metal oxide and process for the production thereof
AssigneeKabushiki Kaisha Kaisui Kagaku Kenkyojo
InventorShigeo Miyata
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Abstract
A halogen-containing resin composition made stable to heat and light, by incorporating (a) a calcium-based composite metal hydroxide of the formula (1), Ca.sub.1-x M.sup.2+.sub.x (OH).sub.2 (1) wherein M.sup.2+ is Mg.sup.2+, Mn.sup.2+, Fe.sup.2+, Co.sup.2+, Ni.sup.2+ and Zn.sup.2+ and x is a number in the range of 0.005<x<0.5 and a calcium-based composite metal oxide of the formula (2)m, Ca.sub.1-x M.sup.2+.sub.x O (2) wherein M.sup.2+ and x are as defined in the formula (1), (b) a .beta.-diketone compound or metal salt thereof, and optionally (c) an organic acid salt of zinc;
Claims8
A halogen-containing resin composition comprising
- (a) 0.1 to 10 parts by weight of at least one of a calcium-based composite metal hydroxide of the formula (1),
- Ca.sub.1-x M.sup.2+.sub.x (OH).sub.2 ( 1)
- wherein M.sup.2+ is at least one divalent metal ion selected from the group consisting of Mg.sup.2+, Mn.sup.2+, Fe.sup.2+, Co.sup.2+, Ni.sup.2+, Cu.sup.2+ and Zn.sup.2+ and x is a number in the range of 0.005<x<0.5
- and a calcium-based composite metal oxide of the formula (2),
- Ca.sub.1-x M.sup.2+.sub.x O (2)
- wherein M.sup.2+ and x are as defined in the formula (1),
- (b) 0.01 to 2 parts by weight of a .beta.-diketone compound or a metal salt thereof,
- (c) 0 to 2 parts by weight of an organic acid salt of zinc, and
- (d) 100 parts by weight of a halogen-containing resin derived from an ethylenically unsaturated monomer.
A composite metal oxide which is a calcium oxide-containing solid solution having the formula (2),
- Ca.sub.1-x M.sup.2+.sub.x O (2)
- wherein M.sup.2+ is at least one divalent metal ion selected from the group consisting of Mg.sup.2+, Mn.sup.2+, Fe.sup.2+, Co.sup.2+, Ni.sup.2+, Cu.sup.2+ and Zn.sup.2+ and x is a number in the range of 0.005<x<0.5
- and having a BET specific surface area ranging from 5 to 300 m.sup.2 /g.
A process for the production of a composite metal oxide which is a calcium oxide-containing solid solution of the formula (2),
- Ca.sub.1-x M.sup.2+.sub.x O (2)
- wherein M.sup.2+ is at least one divalent metal ion selected from the group consisting of Mg.sup.2+, Mn.sup.2+, Fe.sup.2+, Co.sup.2+, Ni.sup.2+, Cu.sup.2+ and Zn.sup.2+ and x is a number in the range of 0.005<x<0.5
- which comprises calcining a calcium hydroxide-containing solid solution of the formula (1),
- Ca.sub.1-x M.sup.2+.sub.x (OH).sub.2 ( 1)
- wherein M.sup.2+ and x are as defined in the formula (2), at a temperature between 400.degree. C. and 1,100.degree. C.
Dependencies are inferred from the claim text.