The disclosure relates to thermally reversibly crosslinked polyolefins (TRC-PO) and methods for making the same. A TRC-PO can be formed by reactive melt-processing a mixture including (i) a polyolefin, (ii) an initiator, and (iii) a reversible crosslinker. The reversible crosslinker includes (A) a grafting agent moiety selected from unsaturated cyclic anhydrides, unsaturated cyclic imides, cyclic nitroxides, and ring-opened analogs thereof, and (B) a crosslinking moiety bound to the cyclic grafting agent moiety. This reactive melt-processing, for example including reactive extrusion, forms a thermally reversibly crosslinked (TRC) polyolefin with polyolefin chains reversibly crosslinked via the reversible crosslinkers, which provide dynamic covalent bonds, such as siloxanes and esters, that are amenable to melt re-processing to re-from or otherwise re-use the TRC-PO while still retaining the reversible crosslinks after re-processing. Catalysts and additives such as rheology modifiers can be added to the melt-processing mixture.

Provided herein is a dual cure resin useful for the production of objects by stereolithography, said resin comprising a mixture of: (a) a light-polymerizable component; and (b) a heat-polymerizable component, said heat-polymerizable component comprising: (i) a dicyclopentadiene-containing polyepoxide resin; (ii) a cyanate ester resin; (iii) an epoxy-reactive toughening agent; and (iv) a core shell rubber toughener.

Provided herein according to some embodiments is a dual cure additive manufacturing resin, comprising: (i) a light polymerizable component, (ii) a photoinitiator, (iii) a heat polymerizable component, and (iv) a non-reactive diluent, which resin is useful for the production of three-dimensional objects by additive manufacturing. Methods of using the same are also provided.

A composition contains: (a) a silicon-free mercapto compound comprising 2 or more mercapto groups; (b) a linear polyorganosiloxane containing one or more than one terminally unsaturated alkenyl group, 40 mole-percent or more phenyl groups relative to moles of silicon atoms and at least one alkoxysilyl group per molecule; (c) a resinous polyorganosiloxane containing one or more than one terminally unsaturated alkenyl group and 20 mole-percent or more phenyl groups relative to moles of silicon atoms; (d) a photoinitiator; and (e) a moisture cure catalyst; and wherein the molar ratio of mercapto groups to terminally unsaturated alkenyl groups in the composition is in a range of 0.3 to 2.0.

The present disclosure relates to a method for manufacturing carboxymethyl cellulose particles, cellulose inducer particles manufactured by the method, and an absorbent article comprising same. The method comprises: (1) a step of obtaining alkalized cellulose by reacting a cellulose raw material with an alkalizer; (2) a step of obtaining carboxymethyl cellulose by reacting the alkalized cellulose with a carboxy methylating agent; (3) a primary cross-linking step of obtaining a slurry-phase carboxymethyl cellulose cross-linked body by reacting the carboxymethyl cellulose with a core cross-linker; (4) a step of washing and dehydrating after filtering the slurry-phase carboxymethyl cellulose cross-linked body; (5) a secondary cross-linking step of obtaining carboxymethyl cellulose having a core-shell structure by reacting the carboxymethyl cellulose cross-linked body having undergone Step (4) with a surface cross-linker; and (6) a step of obtaining carboxymethyl cellulose particles having a core-shell structure by drying and pulverizing the carboxymethyl cellulose having a core-shell structure.

Provided is an acrylic emulsion pressure-sensitive adhesive composition that remains no residues on an adherend, when the pressure-sensitive adhesive is removed after long-term storage, and is easily peeled off, while exhibiting excellent adhesive strength. The acrylic emulsion pressure-sensitive adhesive composition includes an emulsion polymer of a monomer mixture including a (meth)acrylic acid ester-based first monomer including an alkyl group having 1 to 14 carbon atoms and an unsaturated carboxylic acid-based second monomer; an external crosslinking agent including diacetone acrylamide and adipic acid dihydrazide; an internal crosslinking agent; and a polymerization initiator.

Some embodiments of the disclosure provide a polymer film used for a biosensor. The polymer film has a three-dimensional network structure formed by a natural high-molecular polymer and a synthetic high-molecular polymer by a plurality of crosslinking modes. The three-dimensional network structure includes a chemically crosslinked network and a reversible physically crosslinked network, the chemically crosslinked network being formed by covalent bond crosslinking and the reversible physically crosslinked network being formed by ionic bond crosslinking. The chemically crosslinked network has covalent bond crosslinking between the synthetic high-molecular polymers and covalent bond crosslinking between the natural high-molecular polymer and the synthetic high-molecular polymer. The physically crosslinked network has ionic bond crosslinking between natural high-molecular polymers.

Provided herein according to some embodiments is a dual cure additive manufacturing resin, comprising: (i) a light polymerizable component, (ii) a photoinitiator, (iii) a heat polymerizable component, and (iv) a non-reactive diluent, which resin is useful for the production of three-dimensional objects by additive manufacturing. Methods of using the same are also provided.

The present disclosure relates to a method of preparing polymeric microparticles that can realize excellent mechanical strength and stability as well as high crosslinking efficiency and production yield, polymeric microparticles, medical compositions, cosmetic compositions, medical articles and cosmetic articles comprising the same.

Provided is a method for efficiently producing recycled water-absorbing resin particles from, as a raw material, discarded water-absorbing resin particles derived from used sanitary supplies, etc., the recycled water-absorbing resin particles having decreased little in absorption property and having various excellent properties. The method for producing water-absorbing resin particles of the present invention comprises a polymerization step (I) in which an aqueous gel containing a crosslinked polymer (A) of a water-soluble vinyl monomer (a1) is obtained, a gel reduction step (II) in which the aqueous gel is reduced into particles to obtain aqueous-gel particles, a step (Va) in which resin particles including the crosslinked polymer (A) and obtained from the aqueous-gel particles are mixed with a surface-crosslinking agent (d), and a reaction step (Vb) in which the surface-crosslinking agent (d) is reacted.