| 摘要 |
<p>The invention relates to particular orthoester based polymers as well as the use of specific orthoester based polymers as a demulsifier for water/oil emulsions. Products suitable for use according to the invention have the formula (I), wherein R1 is hydrogen or a hydrocarbyl group with 1 -4 carbon atoms, R2, R3, and R4 are, independently, a group comprising C<SUB>3</SUB>-C<SUB>4</SUB> alkyleneoxy groups and/or ethyleneoxy groups in any order, and an end group Y, which is, independently, hydrogen, a hydrocarbyl group with 1-30 carbon atoms, a group -(CH<SUB>2</SUB>)<SUB>z</SUB>NR5R6 or -(CH<SUB>2</SUB>)<SUB>Z</SUB>N<SUP>+</SUP>R5R6R7, wherein each of R5, R6, and R7 is, independently, an alkyl group with 1-22 carbon atoms or -CH<SUB>2</SUB>CH<SUB>2</SUB>OH, and z is 2 or 3, provided that at least one of the groups R2, R3, and R4 comprises at least one block of at least on average 4 alkyleneoxy groups with 3 and/or 4 carbon atoms, and provided that if Y is hydrogen, then at least one of n and m is a number of 1-100, or a di- or polycondensate of the polymer via free hydroxyl groups in R2, R3 or R4.</p> |
