4-Hydroxybenzenesulfonic Acid CAS 98-67-9

Taking 4,4′-diaminodiphenyl ether as raw material, reacting with p-hydroxybenzenesulfonic acid after oxidation and bromination, and finally obtaining a novel aromatic side chain type sulfonated diamine through reduction reaction. In the novel aromatic side chain type sulfonated diamine of the present invention, the hydrophilic group sulfonic acid group is located on the side chain group. Since its spatial position is far away from the main chain, the proton conduction efficiency is improved and the influence on the main chain structure is avoided.

The new aromatic side chain sulfonated diamine can be prepared with dianhydride monomers and non-sulfonated diamine monomers to obtain sulfonated polyimides. The sulfonated polyimides can be used to prepare Performance and Proton Conductivity of Proton Exchange Membranes. The novel aromatic side chain sulfonated diamines have good application prospects in proton exchange membrane fuel cells.

It includes (by mass percentage), 30% to 40% of p-hydroxybenzenesulfonic acid-nitroacetaldehyde-adhesive latex; the catalyst is caustic alkali or triphenylphosphine, and the content is 1-2%; Inorganic flame retardant, which is hydroquinone or p-phenol, with a content of 1-3%; modified nano-magnesium oxide, 2-20%; inorganic flame retardant, which is magnesium hydroxide, aluminum hydroxide and magnesium-aluminum hydrotalcite with 2% : 7: 3 parts by mass, the content of the inorganic flame retardant is 5% to 10%; the balance is phenolic resin.

Wherein, the p-hydroxybenzenesulfonic acid-nitroacetaldehyde-glue latex contains 20wt% of p-hydroxybenzenesulfonic acid, 20wt% of nitroacetaldehyde, 3wt% to 5wt% of carbon black, 5wt% to 10wt% of Nanoscale silicon dioxide powder, 5wt%-10wt% nanoscale zirconia powder, 5wt%-10wt% antioxidant and 1wt%-2wt% dispersant, and the rest are latex emulsion.

It includes (by mass percentage), 30% to 40% of p-hydroxybenzenesulfonic acid-nitroacetaldehyde-glue latex; the catalyst is caustic alkali or triphenylphosphine, and the content is 1~2%; polymerization inhibition agent, which is hydroquinone or p-phenol, with a content of 1~3%; fumed silica, 2~20%; tackifier, which is γ-methacryloyloxypropyltrimethylsilane and propylene The amide is a mixture with a mass ratio of 10:1, and the content is 5% to 10%; the balance is phenolic resin.

Wherein, the p-hydroxybenzenesulfonic acid-nitroacetaldehyde-adhesive latex contains 20wt% of p-hydroxybenzenesulfonic acid, 20wt% of nitroacetaldehyde, 3wt% to 5wt% of oxidized starch, 5wt% to 10wt% of Nanoscale silicon dioxide powder, 5wt%~10wt% nanoscale zirconia powder, 5wt%~10wt% antioxidant and 1wt%~2wt% dispersant, and the rest are latex emulsion.

The method comprises the following steps: (1) sulfonating methylnaphthalene and phenol respectively to obtain a sulfonated methylnaphthalene material and a p-hydroxybenzenesulfonic acid material; (2) performing a hydrolysis reaction on the sulfonated methylnaphthalene material, and azeotropically removes untreated The reacted methylnaphthalene or its homologue, the remaining sulfonated methylnaphthalene material enters the reaction in step (3); (3) the sulfonated methylnaphthalene material obtained in step (2), the p-hydroxyl group obtained in step (1) The formaldehyde acidified by the concentrated sulfuric acid of the benzenesulfonic acid material carries out a condensation reaction to obtain a condensed material; (4) in the condensation material obtained in step (3), an alkaline solution is added to carry out a neutralization reaction to a pH value of 7.5 to 9, and the reaction finishes to obtain a naphthalene-based reducing agent. Water agent.

The above-mentioned naphthalene-based water reducing agent has excellent properties such as good adaptability to cement, good workability of concrete, strong plastic retention performance, small loss of concrete over time, high water reduction rate, etc.; and the preparation method is simple in process and reaction conditions. It is easy to control, and it can also reduce the production cost of naphthalene water reducing agent.

It is prepared from the following raw materials in parts by weight: 60-90 parts of epoxy resin hard glue, 10-18 parts of artificial geranium oil, 3-10 parts of p-hydroxybenzenesulfonic acid, 1-3 parts of dimethyl benzylamine, 1-3 parts of hydrogenated castor oil, 5-8 parts of antimony trioxide, 1-3 parts of talc, 2-5 parts of quartz, 2-5 parts of alumina, 1-3 parts of silicon carbide, 10-20 parts of synthetic nanoparticles share. Due to the addition of epoxy resin hard glue, artificial geranium oil, p-hydroxybenzenesulfonic acid, dimethylbenzylamine, hydrogenated castor oil, antimony trioxide, talc, quartz and aluminum oxide, the encapsulation resin can be used for encapsulation. It can be quickly dried and formed, and the added synthetic nano-powder can effectively increase the strength of the encapsulation resin, play a better fixing and encapsulation effect, enhance the heat dissipation effect of the encapsulated components, and reduce the attenuation. effect.