Compounds, pharmaceutical compositions, methods and kits are described for treating or preventing neurodegenerative diseases such as Alzheimer's disease.

Compounds, pharmaceutical compositions, methods and kits are described for treating or preventing neurodegenerative diseases such as Alzheimer's disease.

Compounds, pharmaceutical compositions, methods and kits are described for treating or preventing neurodegenerative diseases such as Alzheimer's disease.

Compounds, pharmaceutical compositions, methods and kits are described for treating or preventing neurodegenerative diseases such as Alzheimer's disease.

Compounds, pharmaceutical compositions, methods and kits are described for treating or preventing neurodegenerative diseases such as Alzheimer's disease.

Disclosed are a sulfonic acid-modified polyisocyanate and a preparation method thereof. By controlling a content of cyclohexylamine component in the raw material, the reaction rate of sulfamic acid and polyisocyanate is accelerated, so that the prepared product has advantages of light color and low turbidity as well as good storage stability.

Disclosed are a sulfonic acid-modified polyisocyanate and a preparation method thereof. By controlling a content of cyclohexylamine component in the raw material, the reaction rate of sulfamic acid and polyisocyanate is accelerated, so that the prepared product has advantages of light color and low turbidity as well as good storage stability.