Abstract:
A method for decreasing the vapour permeability of a water and air barrier treated substrate that includes treating the substrate with a liquid applied, vapour permeable air and water barrier coating composition comprising a cross-linked polysiloxane dispersion composition.
Abstract:
There is described a low number average molecular weight (M N 75 °C) copolymer (optionally a solid grade oligomer (SGO)) that comprises (a) at least 20 wt-% of itaconate functional monomer(s), (b) not more than 40 % of a hydrophilic monomer, preferably an acid functional monomer(s) in an amount sufficient to achieve an acid value from 65 to 325 mg KOH per g of solid polymer; (c) optionally not more than 70 % of other monomers not being either (a) or (b), having a max content of vinyl aromatic monomer(s) of 40 wt- % and/or max content of methacrylate(s) of 40 wt-%; where the weight percentages of monomers (a), (b) and (c) are calculated as a proportion of the total amount of monomers in the copolymer being 100 %.
Abstract:
There is described an aqueous urethane acrylate copolymer dispersion comprising a) from 10 to 95 wt-% of a polyurethane copolymer, and b) from 5 to 90 wt-% of a polyvinyl copolymer, where vinyl copolymer (b) comprises from 30 parts to 100 parts by weight of biorenewable monomer(s) -such as itaconic acid, itaconate diesters and/or diamides for example dimethyl itaconate (DMI) or dibutyl itaconate (DBI) and where optionally the composition has a residual monomer level of less than 5000 ppm.
Abstract:
There is described a block copolymer comprising at least a block [A] and a block [B], where: (a) (i) block [A] comprises from 5 to 95 mole-% per mole-% of the block [A] of itaconate functional moieties; (b) (i) block [B] is substantially free of itaconate functional moieties. Preferably the block copolymer is made by a controlled radical polymerisation (CRP) such as reversible addition-fragmentation chain transfer (RAFT).
Abstract:
The present invention relates to an oil-in-water emulsion, wherein the oil comprises an acid functional unsaturated polyester which acid functional unsaturated polyester comprises unsaturated dicarboxylic acid units, diol units, units of an emulsifier with HLB value of from 9 to 20 and further comprising chain extender units. The present invention further relates to a fibre mat comprising fibres and a binder comprising such acid functional unsaturated polyester.
Abstract:
Surfactants (e.g., fluorosurfactants) for stabilizing aqueous or hydrocarbon droplets in a fluorophilic continuous phase are presented. In some embodiments, fluorosurfactants include a fluorophilic tail soluble in a fluorophilic (e.g., fluorocarbon) continuous phase, and a headgroup soluble in either an aqueous phase or a lipophilic (e.g., hydrocarbon) phase. The combination of a fluorophilic tail and a headgroup may be chosen so as to create a surfactant with a suitable geometry for forming stabilized reverse emulsion droplets having a disperse aqueous or lipophilic phase in a continuous, fluorophilic phase. In some embodiments, the headgroup is preferably non-ionic and can prevent or limit the adsorption of molecules at the interface between the surfactant and the discontinuous phase. This configuration can allow the droplet to serve, for example, as a reaction site for certain chemical and/or biological reactions. In another embodiment, aqueous droplets are stabilized in a fluorocarbon phase at least in part by the electrostatic attraction of two oppositely charged or polar components, one of which is at least partially soluble in the dispersed phase, the other at least partially soluble in the continuous phase. One component may provide colloidal stability of the emulsion, and the other may prevent the adsorption of biomolecules at the interface between a component and the discontinuous phase. Advantageously, surfactants and surfactant combinations of the invention may provide sufficient stabilization against coalescence of droplets, without interfering with processes that can be carried out inside the droplets.
Abstract:
Die Erfindung betrifft wässrige Harzemulsion, enthaltend ein Harz welches erhalten wurde durch Umsetzung einer Zusammensetzung die mindestens enthält: mindestens einen mehrwertigen Alkohol mit mindestens zwei Hydroxylgruppen, mindestens ein Polyetherpolyol mit einem Molekülgewicht von 400 bis 8000 g/mol, mindestens eine einbasige Carbonsäure und mindestens eine mehrbasige Carbonsäure mit mindestens zwei Carbonsäuregruppen bzw. deren Anhydrid, zu einem Harz umgesetzt wird und die Harzemulsion durch Bereitstellung basischer Gruppen modifiziert wird. Ferner betrifft die Erfindung ein Verfahren zur Herstellung eines Harzes, ein Harz, wie es mit dem Verfahren erhalten wird und einen Lackfilm, der aus der Harzemulsion erhalten wird.