A wax inhibitor composition, the composition having at least one alpha-olefin maleic anhydride copolymer of the formula:

##STR00001##

wherein R.sub.1 is selected from hydrocarbyl groups containing 10-30 carbon atoms, and R.sub.2 is selected from a hydrogen or hydrocarbyl groups containing 10-80 carbon atoms, and R.sub.2, if not hydrogen, is broadly dispersed, wherein R.sub.2 comprises a weight fraction of carbon numbers greater than 30, wherein R.sub.2 can be the same or different, and n is a number of repeating units ranging from 1 to 100.

The present invention provides: a photocurable composition that, although including metal oxide microparticles at high concentration, is such that the metal oxide microparticles are satisfactorily dispersed and leakability to a to-be-coated substrate is satisfactory; a cured product of said photocurable composition; and a cured film formation method that uses the photocurable composition. A photocurable resin composition contains a photopolymerizable compound (A), metal oxide microparticles (B), an initiator (C), and a solvent (S). A compound having a radical-polymerizable-group-containing group or a cationically-polymerizable-group-containing group is used as the photopolymerizable compound (A). As the solvent (S), a plurality of solvents (S1) are used that have a specific structure that includes an oxyalkylene group, and are such that the Hildebrand solubility parameter value thereof is 21.0 MPa.sup.0.5 (alternatively, the solvent (S1) and another solvent (S2) are used at a prescribed mass ratio).

The present invention provides: a photocurable composition that, although including metal oxide microparticles at high concentration, is such that the metal oxide microparticles are satisfactorily dispersed and leakability to a to-be-coated substrate is satisfactory; a cured product of said photocurable composition; and a cured film formation method that uses the photocurable composition. A photocurable resin composition contains a photopolymerizable compound (A), metal oxide microparticles (B), an initiator (C), and a solvent (S). A compound having a radical-polymerizable-group-containing group or a cationically-polymerizable-group-containing group is used as the photopolymerizable compound (A). As the solvent (S), a plurality of solvents (S1) are used that have a specific structure that includes an oxyalkylene group, and are such that the Hildebrand solubility parameter value thereof is 21.0 MPa.sup.0.5 (alternatively, the solvent (S1) and another solvent (S2) are used at a prescribed mass ratio).

Adhesive compositions, facestocks and/or packaging labels containing same, where such compositions, facestocks and/or labels designed to facilitate the recyclability of a plastic article formed from any suitable polymer or mixture of polymers (e.g., a polyethylene terephthalate (PET), recycled polyethylene terephthalate (rPET), high density polyethylene (HDPE), polyvinyl chloride (PVC), low density polyethylene (LDPE), polypropylene (PP), polystyrene (PS), polyesters, recycled polyesters, polylacticacid (PLA), biopolymers, cellulose or other types of polymers or plastics) are described. Methods for removing an adhesive composition, facestock and/or packaging label containing same, from a plastic article that is to be recycled and/or subjected to multi-generational recycling are also provided.

Adhesive compositions, facestocks and/or packaging labels containing same, where such compositions, facestocks and/or labels designed to facilitate the recyclability of a plastic article formed from any suitable polymer or mixture of polymers (e.g., a polyethylene terephthalate (PET), recycled polyethylene terephthalate (rPET), high density polyethylene (HDPE), polyvinyl chloride (PVC), low density polyethylene (LDPE), polypropylene (PP), polystyrene (PS), polyesters, recycled polyesters, polylacticacid (PLA), biopolymers, cellulose or other types of polymers or plastics) are described. Methods for removing an adhesive composition, facestock and/or packaging label containing same, from a plastic article that is to be recycled and/or subjected to multi-generational recycling are also provided.

A dried rheology modifier composition comprises a swellable emulsion polymer and a water soluble support polymer. In one embodiment the swellable emulsion polymer is polymerized in the presence of the water soluble support polymer. In one embodiment the swellable emulsion polymer is blended with the water soluble support polymer. The drying can be accomplished by spray drying, resulting in a non-tacky powder having good shelf life. The dried rheology modifiers can be subjected to a further heat treatment which can result in a rheology modifier that imparts a short flow characteristic to product formulations. The swellable emulsion polymer can be alkali swellable or acid swellable. The water soluble support polymer can be a polysaccharide or a derivative thereof, or a polyvinyl acetate or derivative thereof.

The present invention provides a nitrile group-containing highly saturated copolymer rubber comprising an ,-ethylenically unsaturated nitrile monomer unit in a content of 15 wt % or more and less than 28 wt %, an ,-ethylenically unsaturated monocarboxylic acid ester monomer unit (b) in a content of 10 to 50 wt %, and a conjugated diene monomer unit (c) in a content of 22 to 75 wt %, and having an iodine value of 120 or less, wherein the conjugated diene monomer unit (c) is at least partially hydrogenated, and a proportion of an isoprene unit in the conjugated diene monomer unit (c) is 33 wt % or more.

The present invention provides a nitrile group-containing highly saturated copolymer rubber comprising an ,-ethylenically unsaturated nitrile monomer unit in a content of 15 wt % or more and less than 28 wt %, an ,-ethylenically unsaturated monocarboxylic acid ester monomer unit (b) in a content of 10 to 50 wt %, and a conjugated diene monomer unit (c) in a content of 22 to 75 wt %, and having an iodine value of 120 or less, wherein the conjugated diene monomer unit (c) is at least partially hydrogenated, and a proportion of an isoprene unit in the conjugated diene monomer unit (c) is 33 wt % or more.

The present disclosure discloses a comb polymer or a salt thereof, wherein the structural formula of the comb polymer containing the following constitutional units. ##STR00001##
When the comb polymer provided in the present disclosure is used in a water-based drilling fluid as a filtration control agent, it can eliminate the defects of conventional filtration control agents which would be subject to ineffectiveness under high temperature and high salinity conditions. The comb polymer has high temperature and salt resistance, and can be produced through simple processes at comparatively low costs. When the comb polymer provided by the present disclosure is used as a filtration control agent, even being added into the drilling fluid at a comparatively low amount, it can still present rather good effects in lowering the amount of filter loss.

An acrylic rubber containing acrylate monomer units, methacrylate monomer units, and crosslinkable monomer units, wherein a glass transition temperature is 20 C. or less, a change ratio in volume after a crosslinked rubber of the acrylic rubber is immersed in IRM903 oil at 1502 C. for 72 hours is 0 to 100%, and a change ratio in weight after a crosslinked rubber of the acrylic rubber is immersed in hot water at 1502 C. for 96 hours and dried is 5.0 to 0%.