Abstract: An aldehyde gas deodorant dispersion composed of a mixture of an aminoguanidine salt that has a pH of 1 to 7 when dissolved in purified water and an acidic silica sol, the dispersion having a pH of 1 to 7, wherein a content of the aminoguannidine salt is 0.01 to 100 parts by weight relative to 100 parts by weight of a silica (SiO2) content of the acidic silica sol. The deodorant dispersion can provide excellent deodorizing performance for an aldehyde gas, such as acetaldehyde or formaldehyde, and can further provide excellent deodorizing performance for various types of odors other than aldehyde gases. In addition, the deodorant dispersion can provide deodorizing performance over a wide range of temperatures.

Abstract: The invention provides a deodorant excellent in the deodorization performance against aldehyde gases such as acetaldehyde and formaldehyde and a deodorant having excellent deodorization performance even against various bad smells other than aldehyde gases. The invention has been accomplished on the basis of the finding that a mixture of an inorganic powder with an aminoguanidine salt has excellent deodorization performance against aldehyde gases. This mixture exerts deodorization performance in a wide temperature range. Further, it has been also found that a product obtained by heating the mixture is usable as a deodorant excellent in water resistance. Substrates containing the deodorant are suppressed in the emission of aldehyde gases from the substrates. That is to say, the invention relates to a deodorant against aldehyde gases consisting of a mixture which is composed of an aminoguanidine salt and an inorganic powder and whose aqueous suspensions have pH of 1 to 7.

Abstract: An aldehyde gas absorbent comprising: a porous silicon dioxide having a specific surface area of from 400 to 900 m2/g and an average pore size of from 0.1 to 10 nm; and a polyamine compound carried on the porous silicon dioxide in an amount of from 0.02 to 2.0 mmol/g, said polyamine compound being represented by the following formula: H2N—(CH2CH2—NH)n—CH2CH2NH2 wherein n stands for an integer of from 0 to 3. Also disclosed are a process for absorbing an aldehyde gas and an aldehyde gas-absorbing article using the aldehyde gas absorbent.