Stabiliser for polyolefin-in-polyether polyol dispersions
AssigneeBASF SE
InventorsChristian KOENIG, Frank THIELBEER, Chuan Long FU
Life of this patent
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Abstract
Stabiliser, comprising the reaction product of at least one macromer with at least one C4-30-alkyl(meth)acrylate in at least one polyether polyol 1 in the presence of at least one free radical polymerisation catalyst and optionally at least one chain transfer agent, the at least one macromer being at least one molecule which comprises in its structure one or more polymerisable double bonds, able to copolymerise with C4-30-alkyl(meth)acrylates and which furthermore comprises in its structure one or more hydroxyl-terminated polyether chains.
Claims21
1-26. (canceled)
A stabiliser, comprising a reaction product of at least one macromer with at least one C4-30-alkyl(meth)acrylate in at least one polyether polyol 1 in the presence of at least one free radical polymerisation catalyst and optionally at least one chain transfer agent,
- the at least one macromer being at least one molecule which comprises in its structure at least one polymerisable double bond, able to copolymerise with a C4-30-alkyl(meth)acrylate and which furthermore comprises in its structure at least one hydroxyl-terminated polyether chain,
- wherein a weight ratio of the reaction product of the at least one macromer with the at least one C4-30-alkyl(meth)acrylate to the at least one polyether polyol 1 is in a range of from 20:80 to 80:20, and
- the stabiliser has a particle size DSO smaller than 0.5 μm as determined by static laser diffraction, using a Mastersizer 2000 (Malvern Instruments Ltd), of a sample comprising the stabiliser and diluted with isopropanol in order to obtain an optical concentration suitable for the static laser diffraction.
Dependencies are inferred from the claim text.