A resin composition according to the present invention contains a cyanate compound (A). Further, the resin composition according to the present invention contains a maleimide compound (B) and/or an epoxy resin (C); and primary hexagonal boron nitride particles (D) having an average aspect ratio of 4 to 10.

The polymerizable composition of the present application may exhibit a wide process window to have excellent workability, and may form a phthalonitrile resin having excellent heat resistance or a prepolymer thereof.

Polyhemiaminal (PHA) and polyhexahydrotriazine (PHT) materials are modified by 1,4 conjugate addition chemical reactions to produce a variety of molecular architectures comprising pendant groups and bridging segments. The materials are formed by a method that includes heating a mixture comprising solvent(s), paraformaldehyde, aromatic amine groups, aliphatic amine Michael donors, and Michael acceptors, such as acrylates. The reaction mixtures may be used to prepare polymer pre-impregnated materials and composites containing PHT matrix resin.

A method of forming a three-dimensional object is carried out by: (a) providing a cyanate ester dual cure resin; (b) forming a three-dimensional intermediate from said resin, where said intermediate has the shape of, or a shape to be imparted to, said three-dimensional object, and where said resin is solidified by exposure to light; (c) optionally washing the three-dimensional intermediate, and then (d) heating and/or microwave irradiating said three-dimensional intermediate sufficiently to further cure said resin and form said three-dimensional object. Compositions useful for carrying out the method, and products made from the method, are also described.

Biocidal branched polymeric biguanide compounds are made by polycondensation of sodium dicyanamide and a Afunctional primary amine and/or a tetrafunctional primary amine and optionally with a difunctional primary amine. The branched polymeric biguanide compounds have 2-dimensional conformation that provides better coverage over the surfaces of microorganisms and enhances efficacy as biocides as compared to most commercially available linear (one-dimensional) polymeric biguanide compounds. The bulkier 2-dimensional conformation of this invention limits the uptake, accumulation and release of these branched polymers to and from contact lenses. Therefore, these branched biguanide polymers can reduce the cytotoxicity, enhance compatibility and suitable for ophthalmic use. The highly branched polymers can be prepared with minimum or no difunctional primary amines. The lightly branched polymers can be prepared with of a minimum ratio of trifunctional plus multifunctional primary amines to difunctional primary amines.

The invention generally relates to novel poly-substituted cis stilbenes, their synthesis, their purification, and their use in thermoset resins. These novel cis stilbenes give rise to thermoset resins with greatly improved processing characteristics such as lower melting temperature and lower viscosity; resulting in polymers and composites having greatly improved thermal stability.

In some embodiments, a product, such as a thermoset, has a polyhexahydrotriazine and a self-polymerized cross-linkable polymer. In some embodiments, a product is the reaction product of a diamine, an aldehyde, and a compound having an α,β-unsaturated electron withdrawing moiety.

The present application is directed to methods for solvent-free preparation of polymers and their subsequent processing into activated carbon materials. These methods unexpectedly demonstrate ability to tune pore structure in the polymer gel and carbon produced there from, while also providing distinct advantages over the current art.

A polymerizable composition, a prepolymer, a phthalonitrile resin, or a composite provided herein has excellent heat resistance and does not cause defects that may adversely affect physical properties. In addition, the polymerizable composition exhibits appropriate curing properties, processing temperatures and process windows and to be capable of forming a composite of excellent physical properties.

Provided is a phthalonitrile-based resin, comprising repeat units formed by the reaction of a phthalonitrile compound and a curing agent,

wherein the phthalonitrile compound comprises 4,4-bis(3,4-dicyanophenoxy)diphenyloxide of the following Chemical Formula 1 and 4,4-bis(3,4-dicyanophenoxy)biphenyl of the following Chemical Formula 2 at a weight ratio of 30:70 to 90:10:

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