Ultraviolet absorber composition and resin composition stabilized therewith
AssigneeAsahi Denka Kogyo Kabushiki Kaisha
InventorsTohru Haruna, Shinichi Ishikawa
Life of this patent
Estimating the term…
Abstract
The present invention is directed to an ultraviolet absorber composition which is formed by melt-mixing a compound (A) represented by formula (I): and a resin stabilizer (B) selected from the group consisting of a phenolic antioxidant (b-1), a phosphorus-containing antioxidant (b-2), a hindered amine stabilizer (b-3), and an ultraviolet absorber (b-4) other than the compound (A), at a mass ratio (A)/(B) of 95/5 to 50/50. The composition has excellent compatibility with synthetic resins and provides a stabilized synthetic resin molding.
Claims16
An ultraviolet absorber composition having a reduced melt temperature which comprises a melt-mixture of a compound (A) represented by formula (I):
- and a resin stabilizer (B), wherein
- the resin stabilizer (B) is at least one selected from the group consisting of a phenolic antioxidant (b-1), a phosphorus-containing antioxidant (b-2), a hindered amine stabilizer (b-3), and an ultraviolet absorber (b-4) other than the compound (A), and wherein
- the compound (A) and the resin stabilizer (B) are present in the melt-blend in an amount to provide a mass ratio (A)/(B) of 95/5 to 50/50 sufficient to reduce the melt temperature of the ultraviolet absorber composition.
A method of making a ultraviolet (UV) light stabilized synthetic resin composition which comprises the steps of:
- (1) forming an ultraviolet light absorber composition by melt-mixing a compound (A) represented by formula (I):
- and a resin stabilizer (B), wherein the resin stabilizer (B) is at least one selected from the group consisting of a phenolic antioxidant (b-1), a phosphorus-containing antioxidant (b-2), a hindered amine stabilizer (b-3), and an ultraviolet absorber (b-4) other than the compound (A), and wherein the compound (A) and the resin stabilizer (B) are present in the melt-blend in an amount to provide a mass ratio (A)/(B) of 95/5 to 50/50 sufficient to reduce the melt temperature of the ultraviolet light absorber composition;
- and thereafter
- (2) blending a synthetic resin with a UV light-absorbing sufficient amount of the ultraviolet light absorber composition to form a UV light stabilized synthetic resin composition.
Dependencies are inferred from the claim text.