Cyclic olefin copolymer (COC) and cyclic olefin polymer (COP) are useful as support material for 3D printing of high temperature polymers, such as polyimides.

Butyl based composition having hydrocarbon resins are provided herein. The hydrocarbon resin has a Tg from −10° C. to 25° C., a number average molecular weight between 20 to 500, a weight average molecular weight between about 100 to about 2000, and a glass transition temperature between about 0° C. to about −80° C.

Butyl based composition having hydrocarbon resins are provided herein. The hydrocarbon resin has a Tg from −10° C. to 25° C., a number average molecular weight between 20 to 500, a weight average molecular weight between about 100 to about 2000, and a glass transition temperature between about 0° C. to about −80° C.

The disclosure relates to methods for producing poly(cyclohexadiene) homopolymers (PCHD). The PCHD is formed by polymerizing a 1,3-cyclohexadiene monomer in the presence of a catalyst, in a hydrocarbon solvent, and at a temperature of 100 C. to 120 C. The catalyst is selected from the group consisting of a Bronsted acid, a Lewis acid, and combinations thereof. PCHD produced under these conditions has good solubility in non-polar solvents, and a number average molecular weight of 300 to 5,000 Dalton; a weight average molecular weight of 5,000 to 15,000 Delton; and a polydispersity index of 3.0 to 8.0. The PCHD is useful for producing crosslinked materials having good physical properties. The crosslinked materials can be combined with a rubbery polymer to produce compositions valuable for further downstream uses.

The disclosure relates to methods for producing poly(cyclohexadiene) homopolymers (PCHD). The PCHD is formed by polymerizing a 1,3-cyclohexadiene monomer in the presence of a catalyst, in a hydrocarbon solvent, and at a temperature of 100 C. to 120 C. The catalyst is selected from the group consisting of a Bronsted acid, a Lewis acid, and combinations thereof. PCHD produced under these conditions has good solubility in non-polar solvents, and a number average molecular weight of 300 to 5,000 Dalton; a weight average molecular weight of 5,000 to 15,000 Delton; and a polydispersity index of 3.0 to 8.0. The PCHD is useful for producing crosslinked materials having good physical properties. The crosslinked materials can be combined with a rubbery polymer to produce compositions valuable for further downstream uses.

Provided is a new method that effectively reduces odor components that are present in a hydrogenated petroleum resin, and adjusts a softening point to an appropriate range for exhibiting an adhesive performance.

A method for deodorizing a hydrogenated petroleum resin, includes stripping a hydrogenated petroleum resin at a gas flow rate of 1 to 45 VVM.

Provided is a new method that effectively reduces odor components that are present in a hydrogenated petroleum resin, and adjusts a softening point to an appropriate range for exhibiting an adhesive performance.

A method for deodorizing a hydrogenated petroleum resin, includes stripping a hydrogenated petroleum resin at a gas flow rate of 1 to 45 VVM.

A multi-copolymer, methods for producing the same and using thereof in wastewater treatment application are provided. The method includes pre-mixing by mass 10-30 parts by mass of alkenyl succinic anhydrides, 10-30 parts of vinylbenzyltrimethylammonium chloride, and 10-30 parts of dimethylaminoethyl methacrylate with water to form a first mixture; reacting the first mixture comprising passing thereof through inert gases to provide reflux protection, and adding by mass 10-30 parts of vinyl acetate and 10-30 parts of acrylamide to form a second mixture, followed by heating the second mixture and adding an initiator therein to initiate the reaction. The present invention is simple, at low cost, safe, non-toxic, environmentally friendly, easy to operate, with a better water purification efficiency than that of conventional macromolecule flocculants, multi-functional, good product stability, strong adsorption bridging ability, less dosage requirement for the water treatment agent, and results in a sturdy sludge cake and easily separated flocs.

A multi-copolymer, methods for producing the same and using thereof in wastewater treatment application are provided. The method includes pre-mixing by mass 10-30 parts by mass of alkenyl succinic anhydrides, 10-30 parts of vinylbenzyltrimethylammonium chloride, and 10-30 parts of dimethylaminoethyl methacrylate with water to form a first mixture; reacting the first mixture comprising passing thereof through inert gases to provide reflux protection, and adding by mass 10-30 parts of vinyl acetate and 10-30 parts of acrylamide to form a second mixture, followed by heating the second mixture and adding an initiator therein to initiate the reaction. The present invention is simple, at low cost, safe, non-toxic, environmentally friendly, easy to operate, with a better water purification efficiency than that of conventional macromolecule flocculants, multi-functional, good product stability, strong adsorption bridging ability, less dosage requirement for the water treatment agent, and results in a sturdy sludge cake and easily separated flocs.

The present invention provides:

a copolymer (A) which is a copolymer obtained by copolymerizing one or plural cycloolefin monomers and one or plural acyclic olefin monomers, or a copolymer obtained by copolymerizing two or more cycloolefin monomers, wherein the glass transition temperature (Tg) of the copolymer is 100 C. or higher, the refractive index of the copolymer is 1.545 or higher, and the Abbe's number of the copolymer is 50 or larger, and at least one of the cycloolefin monomers is a deltacyclene.