The present invention provides a (meth)acrylate manufacturing method characterized in that when manufacturing a (meth) acrylate by an ester exchange reaction between an alcohol and a monofunctional (meth)acrylate using catalyst A and catalyst B together, contact treatment of the ester exchange reaction product with adsorbent C is performed. Catalyst A: One or more kinds of compounds selected from a group consisting of cyclic tertiary amines with an azabicyclo structure and salts or complexes thereof, amidine and salts or complexes thereof, compounds with a pyridine ring and salts or complexes thereof, phosphines and salts or complexes thereof, and compounds with a tertiary diamine structure and salts or complexes thereof. Catalyst B: One or more kinds of compounds selected from a group consisting of compounds comprising zinc. Adsorbent C: One or more kinds of compounds selected from a group consisting of oxides and hydroxides comprising at least one of magnesium, aluminum and silicon.
[Problem] The purpose of the present invention is to obtain a multifunctional (meth)acrylate with good yield by an ester exchange reaction of a polyhydric alcohol such as pentaerythritol or dipentaerythritol with a monofunctional (meth)acrylate.
[Solution] A multifunctional (meth)acrylate manufacturing method characterized in that when manufacturing a multifunctional (meth)acrylate by an ester exchange reaction of a polyhydric alcohol with a monofunctional (meth)acrylate, catalyst (A) and catalyst (B) are used together. Catalyst (A): One or more kinds of compounds selected from a group consisting of cyclic tertiary amines with an azabicyclo structure or salts or complexes thereof, amidines or salts or complexes thereof, and compounds with a pyridine ring or salts or complexes thereof. Catalyst (B): One or more kinds of compounds selected from a group consisting of zinc-containing compounds.
A method for producing a (meth) acrylate comprises transesterification reaction of an alcohol and a monofunctional (meth) acrylate with catalysts in combination being cyclic tertiary amines having an azabicyclo structure and compounds containing zinc, separating a solid that contains the catalysts from a reaction product containing a (meth) acrylate, and producing a (meth) acrylate by transesterification reaction of an alcohol and a monofunctional (meth) acrylate, while using the recovered solid catalyst.
The present invention provides an antiaging composition capable of efficiently retarding skin-aging, particularly, alleviating skin pigmentation. The present invention also provides a method for potentiating the antiaging action of ascorbic acids. The invention provides an antiaging composition containing at least one member selected from the group consisting of ascorbic acid, a derivative of ascorbic acid, and a salt thereof (A), and a purine nucleic acid-related substance (B). The invention provides a method for potentiating the antiaging action of such component (A) by the combined use of at least one member selected from the group consisting of ascorbic acid, a derivative of ascorbic acid, and a salt thereof (A), with a purine nucleic acid-related substance (B).
COMPOSITION FOR REGENERATION OF PERIODONTAL HARD TISSUE AND METHOD FOR REGENERATION OF PERIODONTAL HARD TISSUE
申请人:Osaka University
公开号:EP2075329A1
公开(公告)日:2009-07-01
An object of the present invention is to provide technology of using a preadipocyte to restore comprehensively bone, cartilage and periodontal ligament, and cause a periodontal hard tissue to regenerate. By culturing a preadipocyte using a culture medium containing (i) at least one member selected from the group consisting of glycerophosphate and salts thereof, and (ii) at least one member selected from the group consisting of ascorbic acid, derivatives thereof and salts thereof and not containing an adrenal cortical hormone in such an amount that promotes differentiation of a preadipocyte into a periodontal hard tissue cell, differentiation of the cell into a periodontal hard tissue cell is induced efficiently. Furthermore, a scaffold is combined with the preadipocyte cultured with the above-mentioned culture medium to be transplanted into a periodontal tissue that requires regeneration.