Berol Nobel Ab

Akzo Nobel N.v.

Akso Nobel N.v.

Karin Bergstrom

Krister A Holmberg

Per-Erik Hellberg

Lennart Dahlgren

The present invention relates to a new ortho ester-based surfactant, where the hydrophobic and hydrophilic parts are connected by ortho ester linkages to the molecule. The ortho ester has the formulawhere R is hydrogen or an aliphatic group with 1&#x2013;7 carbon atoms; Ris hydrogen or an alkyl group with 1&#x2013;5 carbon atoms; Ais an alkyleneoxy group with 2&#x2013;4 carbon atoms, the number of ethyleneoxy groups being at least 50% of the total number of alkyleneoxy groups; nis a number between 1 and 30; Ris an aliphatic group with 5&#x2013;22 carbon atoms; Ais an alkyleneoxy group with 3&#x2013;4 carbon atoms; nis a number between 0&#x2013;30, provided that when Ris an aliphatic group with 5&#x2013;6 carbon atoms nis at least 1; Ris selected from the group consisting of (A)R, (A)Rand an alkyl group with 1&#x2013;6 carbon atoms, where A, n, R, A, nand Rhave the same meaning as mentioned above; or a di- or polycondensate via any of the free hydroxy groups of the ortho ester. The ortho ester surfactants are stable in alkaline solutions, but are readily hydrolysed in acidic solutions to yield products that are not surface active. They are suitable to be used as emulsifiers or dispersants.

Ortho ester-based surfactant, its preparation and use

The present invention relates to new orthoester-based block polymers having a good antifoaming effect in liquid aqueous systems. The compounds are easily biologically degradable and, compared with traditional block polymers, have a comparatively high cloud point, which makes them readily compatible with other compounds and facilitates the formulation of homogeneous compositions. The new polymers are characterized in that they contain a block of at least 4 alkyleneoxy groups having 3 and/or 4 carbon atoms.

Orthoester-based polymer as well as preparation and use thereof

2-propyl heptanol alkoxylates and process of cleaning hard surfaces

A solid surface having anionic groups capable of reacting with imino groups is provided with a hydrophilic outer surface layer comprising a covalently bonded biopolymer by a method selected from the group consisting of:

Solid surface coated with a hydrophilic outer layer with covalently

A process for covalently bonding biopolymer, such as protein, to an organic polymer surface coated with hydrophilic nonionic polymer having groups reactive with the biopolymer, which comprises reacting biopolymer with the surface in a nonpolar reaction medium, preferably a microemulsion, containing from about 0.5 to about 25% water by weight, having a dielectric constant less than 10% of the dielectric constant of pure water; and the product comprises a biopolymer immobilized on a hydrophilic solid surface having a nonionic polymer and a hydrophilic layer, coupled thereto via biopolymer-reactant groups of the nonionic polymer, and accordingly has low spontaneous adsorption of proteins and other biopolymers through electrostatic attraction and/or hydrophobic interaction.

Growing community of inventors

Kungalv, Sweden

Karin Bergstrom