The present disclosure discloses a preparation method of an ultraviolet (UV)-resistant and transparent lignin-based polyurethane (PU) elastomer. During the synthesis process, natural lignin-based polyols are directly used as an end-capping agent, isophorone diisocyanate and 2,2-dimethylolbutyric acid are used as a hard segment and polyether chain polyols are used as a soft segment, to synthesize a PU elastomer with a transparent brown appearance, excellent high elasticity and elastic recovery performance, as well as excellent mechanical properties, excellent UV resistance and repeatable processability. The lignin-based PU elastomer has a simple preparation process, and has great potential values for use in the fields such as PU elastomer film, fabric coating, and elastic fiber and biomass polymer materials.

The present disclosure discloses a preparation method of an ultraviolet (UV)-resistant and transparent lignin-based polyurethane (PU) elastomer. During the synthesis process, natural lignin-based polyols are directly used as an end-capping agent, isophorone diisocyanate and 2,2-dimethylolbutyric acid are used as a hard segment and polyether chain polyols are used as a soft segment, to synthesize a PU elastomer with a transparent brown appearance, excellent high elasticity and elastic recovery performance, as well as excellent mechanical properties, excellent UV resistance and repeatable processability. The lignin-based PU elastomer has a simple preparation process, and has great potential values for use in the fields such as PU elastomer film, fabric coating, and elastic fiber and biomass polymer materials.

The present disclosure discloses a preparation method of an ultraviolet (UV)-resistant and transparent lignin-based polyurethane (PU) elastomer. During the synthesis process, natural lignin-based polyols are directly used as an end-capping agent, isophorone diisocyanate and 2,2-dimethylolbutyric acid are used as a hard segment and polyether chain polyols are used as a soft segment, to synthesize a PU elastomer with a transparent brown appearance, excellent high elasticity and elastic recovery performance, as well as excellent mechanical properties, excellent UV resistance and repeatable processability. The lignin-based PU elastomer has a simple preparation process, and has great potential values for use in the fields such as PU elastomer film, fabric coating, and elastic fiber and biomass polymer materials.

The invention provides a method for polishing or planarizing a substrate of at least one of semiconductor, optical and magnetic substrates. The method includes attaching a polymer-polymer composite polishing pad having a polishing layer to a polishing device. A hydrophilic polymeric matrix forms the polishing layer. Cationic fluoropolymer particles having nitrogen-containing end groups are embedded in the polymeric matrix. A slurry containing anionic particles is applied to the polymer-polymer composite polishing pad and rubbed against the substrate to polish or planarize the substrate with the fluoropolymer particles interacting with the anionic particles to increase polishing removal rate.

The present invention relates to a moisture-crosslinkable sealant composition comprising: at least one polyurethane P comprising at least two NCO end functions; at least one polyimine A obtained via a process comprising a step of reaction between at least: a) a (poly)urethane-aldehyde comprising at least 2 aldehyde functions; b) a primary diamine; c) optionally in the presence of a primary monoamine or a monoaldehyde if the —CHO/NH.sub.2 molar ratio is other than 1.

A linear polymer containing isocyanate groups and having an NCO content in the range from 0.3% to 1.5% by weight and a monomeric diisocyanate content of not more than 0.5% by weight, wherein it is obtained from the reaction of at least one monomeric aromatic diisocyanate and a polyether diol having an OH number in the range from 5 to 21 mg KOH/g in an NCO/OH ratio of at least 5/1 and subsequent removal of a majority of the monomeric aromatic diisocyanate by means of a suitable separation method, and to moisture-curing polyurethane compositions having a monomeric diisocyanate content of less than 0.1% by weight, comprising said polymer. The polymer of the invention enables elastic adhesives having high elongation, surprisingly high strength and surprisingly good adhesion to plastic substrates.

A linear polymer containing isocyanate groups and having an NCO content in the range from 0.3% to 1.5% by weight and a monomeric diisocyanate content of not more than 0.5% by weight, wherein it is obtained from the reaction of at least one monomeric aromatic diisocyanate and a polyether diol having an OH number in the range from 5 to 21 mg KOH/g in an NCO/OH ratio of at least 5/1 and subsequent removal of a majority of the monomeric aromatic diisocyanate by means of a suitable separation method, and to moisture-curing polyurethane compositions having a monomeric diisocyanate content of less than 0.1% by weight, comprising said polymer. The polymer of the invention enables elastic adhesives having high elongation, surprisingly high strength and surprisingly good adhesion to plastic substrates.

A linear polymer containing isocyanate groups and having an NCO content in the range from 0.3% to 1.5% by weight and a monomeric diisocyanate content of not more than 0.5% by weight, wherein it is obtained from the reaction of at least one monomeric aromatic diisocyanate and a polyether diol having an OH number in the range from 5 to 21 mg KOH/g in an NCO/OH ratio of at least 5/1 and subsequent removal of a majority of the monomeric aromatic diisocyanate by means of a suitable separation method, and to moisture-curing polyurethane compositions having a monomeric diisocyanate content of less than 0.1% by weight, comprising said polymer. The polymer of the invention enables elastic adhesives having high elongation, surprisingly high strength and surprisingly good adhesion to plastic substrates.

The present invention is directed towards an electrodepositable coating composition comprising a cationic electrodepositable binder; a phyllosilicate pigment; and a dispersing agent. Also disclosed are methods of making the electrodepositable coating composition, coatings derived therefrom, and substrates coated with the coatings derived from the electrodepositable coating composition.

The present invention is directed towards an electrodepositable coating composition comprising a cationic electrodepositable binder; a phyllosilicate pigment; and a dispersing agent. Also disclosed are methods of making the electrodepositable coating composition, coatings derived therefrom, and substrates coated with the coatings derived from the electrodepositable coating composition.