An object is to provide a cured product having excellent heat resistance and dielectric properties (low dielectric properties) and prepregs, circuit boards, build-up films, semiconductor sealing materials, and semiconductor devices having these pieces of performance by using a curable resin having a specific structure. Specifically, provided is a curable resin having a structural unit (1) represented by General Formula (1) below and a terminal structure (2) represented by General Formula (2) below. In Formulae (1) and (2) above, the details of R.sub.1, R.sub.2, R.sub.3, k, and X are as described herein.

##STR00001##

The present application can provide a preparation method that can effectively produce a polymer having desired molecular weight characteristics and solubility in a solvent, and having a monomer composition, which is designed freely and variously according to the purpose, without unnecessary components with excellent polymerization efficiency and conversion rates, and a dispersion comprising the polymer formed by the preparation method.

There are provided PVP-PLA block copolymers as defined in Formula (1): I wherein, x is an initiator alcohol having a boiling point greater than I 45° C., n is, on average, from 20 and 40, and m is, on average, from 10 and 40, wherein the block copolymers have a number average molecular weight (Mn) of at least 3000 Da. Polymers demonstrating flexibility in formulating multiple low solubility active pharmaceutical ingredients (APis) are described. Liquid and dry pharmaceutical formulations comprising an API are described, along with delivery methods, uses, and kits. APis may include, e.g. 11urbiprofon, celecoxib, acetaminophen, or propofol. Also provided is a method of synthesizing the PVP-PLA block copolymers by (i) initiating polymerization of D,L-Lactide from the initiator alcohol x to form poly(lactic acid), adding a xanthate to form a PLA macroinitiator, and polymerizing NVP onto the PLA macroinitiator, by controlled polymerization, to form the block copolymer compound of Formula (I).

A polymer containing an optionally substituted repeat unit of formula (I) wherein each R is the same or different and represents H or an electron withdrawing group, and each R.sup.1 is the same or different and represents a substituent. ##STR00001##

A biodegradable cationic polymer is disclosed, comprising first repeat units derived from a first cyclic carbonyl monomer by ring-opening polymerization, wherein more than 0% of the first repeat units comprise a side chain moiety comprising a quaternary amine group; a subunit derived from a monomeric diol initiator for the ring-opening polymerization; and an optional endcap group. The biodegradable cationic polymers have low cytotoxicity and form complexes with biologically active materials useful in gene therapeutics and drug delivery.

Embodiments are directed to compositions comprising (i) amphiphilic block copolymer, (ii) resin material; and amine modified graphene oxide; where the composition shows a synergic effect in critical strain energy release rate (Glc) value versus predicted value calculated by adding (i) the Glc value for neat resin material, plus (ii) the difference in Glc found when adding the amphiphilic block copolymer to the resin material versus the neat resin material, plus (iii) the difference in Glc found when adding the amine modified graphene oxide to the resin material versus the neat resin material.

The present application is directed to a nanocomposite organo gel having a continuous polymeric network structure, wherein polymer chains are held together by ionic interaction between polymer chain ends, interparticle chain entanglements, layered silicate surface modifier, ionic salt, and layered silicate. The present application is also directed to methods of making and using the nanocomposite organo gel.

The invention provides compositions and methods for cytosolic delivery of peptides and antigens as well as concomitant delivery of antigens and agonists via poly-norbornene-based protein transduction domain mimics.

The present invention provides a polycarbonate-based resin composition, including: a polycarbonate-based resin (S) containing a polycarbonate-polyorganosiloxane copolymer (A), which contains a polycarbonate block (A-1) formed of a specific repeating unit and a polyorganosiloxane block (A-2) containing a specific repeating unit; and a copolymer (B) including a constituent unit (b-1) having a specific structure, a constituent unit (b-2) having a specific structure, and a constituent unit (b-3) having a specific structure.

Polycarbonate-based compositions containing polyether carbonate polyol are described. The compositions have an elevated transmittance in the VIS range as a result of the additive and further advantageous properties, for instance improved demolding characteristics. Even small amounts have a significant impact.