摘要:
The invention relates to a process for preparing oligo- or polyalkylene ether-modified polysiloxanes by transesterification of alkoxy-functionalized polysiloxanes with OH-terminated oligo- or polyalkylene ethers in the presence of an alkanesulfonic acid as catalyst. Oligo- or polyalkylene ether-modified polydimethylsiloxanes obtainable through this process are suitable as defoamers, as wetting agents, and as additives in coating material formulations.
摘要:
In formula (I), each R1, R2 and R3 is independently —OR4, R4 being independently hydrogen or a C1 to C24 hydrocarbyl group optionally containing heteroatoms, or C1 to C24 hydrocarbyl groups optionally containing heteroatoms; n is 2, 3, 4 or 5; o is 2, 3, 4 or 5; p is 2, 3, 4 or 5; with the proviso that at least one of R1 and at least one of R2 and at least one of R3 is —OR4. A coating is obtained by applying the coating composition to a substrate for protecting the substrate against UV/Vis-radiation or for stabilizing the substrate against the deleterious influence of UV/Vis-radiation.
摘要:
The present invention pertains to tinted clear coating for wood comprising: a) an un-tinted clear coating layer and b) at least one tinted clear coating layer and to a process for obtaining such tinted clear coating for wood.