The present invention discloses a preparation method of an insulating dielectric for improving energy density, including dissolving 1,4-phenylene diisothiocyanate in a polar solvent, then adding an organic diamine, and reacting at room temperature for 3 h to 6 h under a nitrogen atmosphere; then adding 4,4-oxydianiline and pyromellitic dianhydride, and reacting at room temperature for 12 h to 18 h under a nitrogen atmosphere to obtain a random copolymer solution of polythiourea and polyamic acid; and spreading the random copolymer solution of polythiourea and polyamic acid on a copper plate, and carrying out gradient temperature elevation to obtain a random copolymer of polythiourea and polyimide.

Disclosed herein are polyurethanes useful for polishing layers, where the polyurethane is a polyurethane having a Schiff base. Also disclosed herein are polishing layers containing the polyurethanes, polishing methods that use the polishing layers, and a modification method including a step of converting the Schiff base into at least one functional group selected from an aldehyde group, a carboxylic acid group, a hydroxyl group, and an amino group.

A polymerizable composition for an optical material includes a prepolymer which is a reaction product of a first amine compound (A1) having a weight-average molecular weight of less than 4,000, a first diol compound (B1) having a viscosity (25 C.) of equal to or less than 100 mPa.Math.s, and a polyisocyanate compound (C); and a first polythiol compound (D1), in which the first amine compound (A1) is at least one selected from a polyetheramine and an aromatic amine, and the first polythiol compound (D1) includes a dithiol compound (d1) having two mercapto groups and a polythiol compound (d2) having equal to or more than three mercapto groups.

Suggested is a urea urethane with improved rheological properties, obtainable or obtained according to a process encompassing or consisting of the following steps: (a) providing a monohydroxyl compound; (b) providing a diisocyanate compound; (c) reacting said monohydroxyl compound and said diisocyanate compound to form a pre-polymer; (d) reacting said pre-polymer with a diamine compound,
Wherein said pre-polymer and said diamine are reacted in the presence of a surfactant.

A method for producing a flexible-packaging film in which a first substrate and a second substrate are laminated with a reactive adhesive of a polyisocyanate composition (X) and a polyol composition (Y) therebetween includes a two-component separate application step in which a liquid mixture applied to the first substrate and including the polyisocyanate composition (X) and the polyol composition (Y), and a catalyst (Z) formed in a dot pattern on the second substrate are brought into contact with each other to achieve contact-bonding together. The substrates are preferably plastic films, metal vapor-deposition films, or metal foils. As the second substrate, a non-oriented film is preferably employed.

A polymer having a repeating unit represented by Formula 1:

##STR00001## wherein each of R.sub.1, R.sub.2, and R.sub.3 is independently selected from a substituted or unsubstituted C1-C6 chain-like saturated or unsaturated hydrocarbon group having 0 to 2 first heteroatoms or a substituted or unsubstituted C3-C6 cyclic saturated or unsaturated hydrocarbon group having 0 to 2 first heteroatoms, wherein at least one of R.sub.1, R.sub.2, and R.sub.3 is a hydrocarbon group substituted with a fluorine atom. R.sub.4 is a C1-C10 chain-like saturated or unsaturated hydrocarbon group having 0 to 2 second heteroatoms or a C3-C10 cyclic saturated or unsaturated hydrocarbon group having 0 to 2 second heteroatoms. R.sub.5 is a C1-C10 chain-like saturated or unsaturated hydrocarbon group having 1 to 6 third heteroatoms or a C3-C10 cyclic saturated or unsaturated hydrocarbon group having 1 to 6 third heteroatoms.

An amino silicone oil-modified elastomer material includes Component A and Component R. Component A includes isocyanate prepolymer obtained through reaction of polyol and isocyanate, and the isocyanate prepolymer has a NCO content of 22-30%; Component R includes the following components in parts by weight: 45-60 parts of polyether amine, 1-6 parts of liquid amine chain extender, 1-10 parts of polysulfide rubber, 2-8 parts of nano silica, and 3-8 parts of amino silicone oil. The elastomer material of the invention ensures the elasticity of the polymer while improving mechanical properties. Moreover, it can improve elongation, wear resistance and water resistance of the polyurea material.

There is provided a composite for film formation, including: a first component and a second component that are polymerized with each other to produce a urea compound, wherein at least one of the first component and the second component is a monofunctional compound.

A formulation technology for low pressure two component polyurethane foam-funning compositions containing gaseous hydrohaloolefin blowing agents is described with improved storage stability and extended shelf-life. The B-side component of the formulations contain a gaseous hydrohaloolefin blowing agent and a polyol pre-mix, the polyol pre-mix comprising liquid blowing agent, polyol, and a catalyst containing at least one catalytic metal compound.

In one aspect, the present disclosure relates to click-functional antimicrobial molecules (including small molecules or, in some cases, macromolecules) and the construction of antimicrobial polymers such as polyurethanes, polyesters, and polyacrylates, including through the use of such molecules. In some cases, the antimicrobial click-functional molecules are based on 1,2-benzisothiazolin-3-one (BIT), trimethylguanidine or tetramethylguanidine (TMG), polyhexamethylene guanidine (PHMG), fluorine-containing molecules, or a combination thereof. For example, 1,2-benzisothiazolin-3-one (BIT) functionalized with an alkyne (BIT-Al), trimethylguanidine or tetramethylguanidine (TMG) functioned with an alkyne (TMG-Al) or dual alkynes (TMG-dAl), and/or polyhexamethylene guanidine (PHMG) functionalized with an alkyne (PHMG-Al) are described herein. Clickable antimicrobial polymers can be used to form coatings or films.