STYRENE DERIVATIVE, POLYSTYRENE DERIVATIVE COMPRISING THE SAME, PROCESS FOR PREPARING SAID POLYSTYRENE DERIVATIVE, AND ULTRAVIOLET ABSORBER COMPRISING SAID STYRENE DERIVATIVE OR POLYSTYRENE DERIVATIVE

Title:

STYRENE DERIVATIVE, POLYSTYRENE DERIVATIVE COMPRISING THE SAME, PROCESS FOR PREPARING SAID POLYSTYRENE DERIVATIVE, AND ULTRAVIOLET ABSORBER COMPRISING SAID STYRENE DERIVATIVE OR POLYSTYRENE DERIVATIVE

Document Type and Number:

WIPO Patent Application WO/1989/004824

Kind Code:

A1

Abstract:

The styrene derivative of the present invention is characterized by comprising a compound represented by general formula (I), wherein at least one of R1, R2, R3, R4 and R5 is a carboxyl group, an alkyl group having 1 to 5 carbon atoms, a hydroxyalkyl group having 1 to 5 carbon atoms, a carboxyalkyl group having 2 to 6 carbon atoms, an alkoxycarbonyl group having 2 to 6 carbon atoms, an alkoxycarbonylalkyl group having 2 to 6 carbon atoms, or an aryl group and the remainders are each a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and R6 is a sulfur atom or an oxygen atom. The styrene derivative has excellent capability of absorbing an ultraviolet ray having a wavelength from 290 nm, i.e., the shortest wavelength contained in sunrays reaching the surface of the earth, to 360 nm having an effect of causing the change in the plastics. The polystyrene derivative of the present invention is characterized by maintaining high water solubility through polymerization of said styrene derivative and causing no skin absorption, i.e., having high safety to the human body. Since the ultraviolet absorption wavelength region is the same as that which brings about a sunburn of the skin, which renders the polystyrene derivative suitable for use as an ultraviolet absorber. Further, according to the process for preparing the polystyrene derivative of the present invention, the polystyrene derivative can be purified in the stage of a monomer, which makes it possible to provide a polystyrene derivative having high quality and high stability.

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Inventors:

NAKAYAMA TOHRU (JP)
KAJIFUSA NORIYUKI (JP)
HORINAKA AKIO (JP)
FUJII SETSURO (JP)

Application Number:

PCT/JP1988/001180

Publication Date:

June 01, 1989

Filing Date:

November 22, 1988

Export Citation:

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Assignee:

EARTH CHEMICAL CO (JP)

International Classes:

A61K8/81; A61Q17/04; C07C281/10; C07C281/14; C07C337/08; C08F12/26; C08F226/00; C09D5/32; (IPC1-7): C07C133/08; C07C159/00; C08F226/00; C09K3/00

Foreign References:

JPS51131852A	1976-11-16
JPS59164768A	1984-09-17
JPH05665865A

Other References: