Anti-allergen agent

Abstract

Conventional tannic acid and polyphenol anti-allergen agents are known as anti-allergen agents capable of deactivating allergens such as mites and pollen, but these agents have inferior heat resistance and pose problems with coloration, discoloration and elution. The purpose of the present invention is to provide an anti-allergen agent that has excellent heat resistance, shows no coloration, and has excellent water resistance and workability. It was discovered that using an inorganic substance having a high acid site concentration with acid site concentration being defined as the number of acid sites having a pKa of 4.8 or less, it is possible to realize an anti-allergen that manifests strong anti-allergen effects, has excellent heat resistance and water resistance, shows little coloration, and has excellent workability.

1 .- 8 . (canceled) 
     
     
         9 . An anti-allergen agent comprising an inorganic powder having a concentration of acid sites with a pKa of no greater than 4.8 of at least 0.001 mmol/g but no greater than 10 mmol/g. 
     
     
         10 . The anti-allergen agent according to  claim 9 , wherein the inorganic powder has a median diameter, measured by a laser particle size distribution analyzer and calculated on a volumetric basis, of at least 0.01 μm but no greater than 50 μm. 
     
     
         11 . The anti-allergen agent according to  claim 9 , wherein the inorganic powder has a pH as a 5 wt % aqueous dispersion of at least 3 but no greater than 9. 
     
     
         12 . The anti-allergen agent according to  claim 9 , wherein the inorganic powder is at least one selected from an amorphous magnesium silicate, an α-type zirconium phosphate, and an activated titanium oxide. 
     
     
         13 . The anti-allergen agent according to  claim 9 , wherein the inorganic powder is an amorphous magnesium silicate. 
     
     
         14 . The anti-allergen agent according to  claim 9 , wherein the inorganic powder has a concentration of acid sites with a pKa of no greater than 4.8 of at least 0.01 mmol/g but no greater than 10 mmol/g. 
     
     
         15 . The anti-allergen agent according to  claim 9 , wherein the water content of the inorganic powder is at least 0.5 wt %. 
     
     
         16 . A method for inactivating an allergen comprising:
 a step of preparing an anti-allergen agent, and   a step of directly contacting the anti-allergen agent with an allergen,   wherein the anti-allergen agent comprising an inorganic powder having a concentration of acid sites with a pKa of no greater than 4.8 of at least 0.001 mmol/g but no greater than 10 mmol/g.   
     
     
         17 . The method for inactivating an allergen according to  claim 16 , wherein the inorganic powder has a median diameter, measured by a laser particle size distribution analyzer and calculated on a volumetric basis, of at least 0.01 μm but no greater than 50 μm. 
     
     
         18 . The method for inactivating an allergen according to  claim 16 , wherein the inorganic powder has a pH as a 5 wt % aqueous dispersion of at least 3 but no greater than 9. 
     
     
         19 . The method for inactivating an allergen according to  claim 16 , wherein the inorganic powder is at least one selected from an amorphous magnesium silicate, an α-type zirconium phosphate, and an activated titanium oxide. 
     
     
         20 . The method for inactivating an allergen according to  claim 16 , wherein the inorganic powder is an amorphous magnesium silicate. 
     
     
         21 . The method for inactivating an allergen according to  claim 16 , wherein the inorganic powder has a concentration of acid sites with a pKa of no greater than 4.8 of at least 0.01 mmol/g but no greater than 10 mmol/g. 
     
     
         22 . The method for inactivating an allergen according to  claim 16 , wherein the water content of the inorganic powder is at least 0.5 wt %. 
     
     
         23 . A coating composition comprising the anti-allergen agent according to  claim 9  and a binder or a paint. 
     
     
         24 . The coating composition according to  claim 23 , wherein it has a pH of at least 3 but no greater than 9. 
     
     
         25 . An anti-allergen product processed using the coating composition according to  claim 23 . 
     
     
         26 . An anti-allergen fabric processed using the coating composition according to  claim 23 .