The present disclosure provides a bio-based epoxy chain extender and a preparation method thereof, belonging to the technical field of chain extenders, and the preparation method includes the following steps: (1) mixing ESO and CD and carrying out catalytic reaction to obtain ESO.sub.n-CD; and (2) mixing and heating the ESO.sub.n-CD with concentrated sulfuric acid, dropwise adding a mixture of glacial acetic acid and hydrogen peroxide for stirring reaction, and after the stirring reaction, carrying out extraction and separation to remove a solvent to obtain the bio-based epoxy chain extender. The present disclosure also provides a bio-based epoxy chain extender prepared by the preparation method.

The present disclosure provides a bio-based epoxy chain extender and a preparation method thereof, belonging to the technical field of chain extenders, and the preparation method includes the following steps: (1) mixing ESO and CD and carrying out catalytic reaction to obtain ESO.sub.n-CD; and (2) mixing and heating the ESO.sub.n-CD with concentrated sulfuric acid, dropwise adding a mixture of glacial acetic acid and hydrogen peroxide for stirring reaction, and after the stirring reaction, carrying out extraction and separation to remove a solvent to obtain the bio-based epoxy chain extender. The present disclosure also provides a bio-based epoxy chain extender prepared by the preparation method.

The present invention relates to tiglien-3-one compounds and their use in methods of treating or preventing protozoal infections, bacterial infections, parasitic infections and cell proliferative disorders. The tiglien-3-one compounds are also used in methods of controlling pests in humans, animals, plants and the environment.

The present invention relates to tiglien-3-one compounds and their use in methods of treating or preventing protozoal infections, bacterial infections, parasitic infections and cell proliferative disorders. The tiglien-3-one compounds are also used in methods of controlling pests in humans, animals, plants and the environment.

The present invention relates to tiglien-3-one compounds and their use in methods of treating or preventing protozoal infections, bacterial infections, parasitic infections and cell proliferative disorders. The tiglien-3-one compounds are also used in methods of controlling pests in humans, animals, plants and the environment.

The present invention relates to tiglien-3-one compounds and their use in methods of treating or preventing protozoal infections, bacterial infections, parasitic infections and cell proliferative disorders. The tiglien-3-one compounds are also used in methods of controlling pests in humans, animals, plants and the environment.

The present invention relates to tiglien-3-one compounds and their use in methods of treating or preventing protozoal infections, bacterial infections, parasitic infections and cell proliferative disorders. The tiglien-3-one compounds are also used in methods of controlling pests in humans, animals, plants and the environment.

The present disclosure provides a bio-based epoxy chain extender and a preparation method thereof, belonging to the technical field of chain extenders, and the preparation method includes the following steps: (1) mixing ESO and CD and carrying out catalytic reaction to obtain ESO.sub.n-CD; and (2) mixing and heating the ESO.sub.n-CD with concentrated sulfuric acid, dropwise adding a mixture of glacial acetic acid and hydrogen peroxide for stirring reaction, and after the stirring reaction, carrying out extraction and separation to remove a solvent to obtain the bio-based epoxy chain extender. The present disclosure also provides a bio-based epoxy chain extender prepared by the preparation method.

The present disclosure provides a bio-based epoxy chain extender and a preparation method thereof, belonging to the technical field of chain extenders, and the preparation method includes the following steps: (1) mixing ESO and CD and carrying out catalytic reaction to obtain ESO.sub.n-CD; and (2) mixing and heating the ESO.sub.n-CD with concentrated sulfuric acid, dropwise adding a mixture of glacial acetic acid and hydrogen peroxide for stirring reaction, and after the stirring reaction, carrying out extraction and separation to remove a solvent to obtain the bio-based epoxy chain extender. The present disclosure also provides a bio-based epoxy chain extender prepared by the preparation method.

The present invention relates to a method for preparing polyols of formula (I) ##STR00001## R.sub.1 being H or an alkyl group, R being especially an alkyl group, A.sub.1, being an alkylene radical and R.sub.3, are being especially a group -A.sub.2-OY, A.sub.2 being an alkylene radical and Y being especially H, said method especially comprising a step of epoxidation of a compound of formula ##STR00002## R.sub.1 being H or an alkyl group, A.sub.t being defined as above in formula (I) and R.sub.4 being especially a group -A.sub.2-OY.sub.1, A.sub.2 being defined as above in formula (I) and Y.sub.1 being especially H, in order to obtain a compound of formula ##STR00003## A.sub.1 being defined as above, R.sub.1 being H or an alkyl group and R.sub.5 being especially a group of formula -A.sub.2-OY.sub.2, A.sub.2 being as defined above in formula (I) and Y.sub.2 being especially H.