A solvent composition includes an organic solvent including one or more organic solvents (A) and one or more organic solvents (B), and one or more types of core-shell polymer particles each comprising a core layer and a shell layer. The organic sol vents (A) have a polar teen p of a Hansen solubility parameter of less than 11 and a hydrogen bond term h of less than 10, and the organic solvents (B) satisfy at least one of 11 or more of the polar term p or 10 or more of the hydrogen bond term h. A weight ratio of (A) to (B) ranges from 15:85 to 95:5. Based on a total weight of the solvent composition, a content of the core-shell polymer particles is 20 to 40% by weight and a water content is 1% by weight or less.

A solvent composition includes an organic solvent including one or more organic solvents (A) and one or more organic solvents (B), and one or more types of core-shell polymer particles each comprising a core layer and a shell layer. The organic sol vents (A) have a polar teen p of a Hansen solubility parameter of less than 11 and a hydrogen bond term h of less than 10, and the organic solvents (B) satisfy at least one of 11 or more of the polar term p or 10 or more of the hydrogen bond term h. A weight ratio of (A) to (B) ranges from 15:85 to 95:5. Based on a total weight of the solvent composition, a content of the core-shell polymer particles is 20 to 40% by weight and a water content is 1% by weight or less.

A prepolymerized resin and a method of preparing the prepolymerized resin are provided, the method comprising a step of prepolymerizing t-butyl styrene and unsaturated bond-containing polyphenylene oxide. The unsaturated bond-containing polyphenylene oxide comprises: methacrylate-terminated polyphenylene oxide, vinylbenzyl-terminated polyphenylene oxide, vinylbenzyl-modified bisphenol A polyphenylene oxide resin, vinyl-containing chain-extended polyphenylene oxide resin or a combination thereof. A resin composition comprising the prepolymerized resin and an article made from the resin composition are also provided.

An object of the present invention is to provide a novel photosensitive resin precursor that can be developed with an alkali and ring-closed even at low temperatures, and preferably has excellent thermal properties and excellent electric properties after curing, and also to provide a use application thereof. As means for achieving the object, disclosed are a bismaleimide compound comprising, in one molecule, two partial structures in each of which a carbon atom having a substituent represented by the following formula (A) (wherein Y represents a direct bond or a divalent linking group), and a carbon atom having a hydroxy group are directly bonded to each other, a polymer which is a self-polymer of the bismaleimide compound, and a benzoxazole which is an intramolecular dehydrated ring-closed product of the polymer. ##STR00001##

The present invention is a quartz glass fiber-containing prepreg, including: (A) at least one quartz glass fiber selected from the group consisting of a quartz cloth, a quartz chopped strand, a quartz nonwoven fabric, and a quartz wool; as well as a resin composition including (B) a maleimide compound that is a solid at 25 C., containing at least one dimer acid skeleton, at least one linear alkylene group having 6 or more carbon atoms, and at least two maleimide groups in the molecule; and (C) a curing accelerator, wherein the total content of uranium and thorium is 0 to 0.1 ppm. This provides a quartz glass fiber-containing prepreg to give a quartz glass fiber-containing substrate that is used as a PCB to prevent malfunction of a semiconductor device caused by the PCB to decrease transmission loss.

The present invention is a quartz glass fiber-containing prepreg, including: (A) at least one quartz glass fiber selected from the group consisting of a quartz cloth, a quartz chopped strand, a quartz nonwoven fabric, and a quartz wool; as well as a resin composition including (B) a maleimide compound that is a solid at 25 C., containing at least one dimer acid skeleton, at least one linear alkylene group having 6 or more carbon atoms, and at least two maleimide groups in the molecule; and (C) a curing accelerator, wherein the total content of uranium and thorium is 0 to 0.1 ppm. This provides a quartz glass fiber-containing prepreg to give a quartz glass fiber-containing substrate that is used as a PCB to prevent malfunction of a semiconductor device caused by the PCB to decrease transmission loss.

The disclosure relates to the functionalization of a carbon-carbon backbone (CCB) polymer using a (cyclic) grafting agent, an initiator, and optionally a reversible radical trapping agent. The grafting agent and/or initiator can be particularly selected in terms of their surface energy and/or half-life, respectively, to limit or control undesirable effects associated with reactive melt-processing, such as excessive crosslinking, chain scission, or grafting agent homopolymerization, as well as to improve or control desirable effects associated with reactive melt-processing, such as improved relative graft uniformity or homogeneity on the CCB polymer. In some cases, the grafting agent can further include a functional group to impart some additional or new chemical or physical property to the CCB polymer. In some cases, the reactively melt-processed mixture includes two or more different polymers that are compatibilized via the grafting agent.

The disclosure relates to the functionalization of a carbon-carbon backbone (CCB) polymer using a (cyclic) grafting agent, an initiator, and optionally a reversible radical trapping agent. The grafting agent and/or initiator can be particularly selected in terms of their surface energy and/or half-life, respectively, to limit or control undesirable effects associated with reactive melt-processing, such as excessive crosslinking, chain scission, or grafting agent homopolymerization, as well as to improve or control desirable effects associated with reactive melt-processing, such as improved relative graft uniformity or homogeneity on the CCB polymer. In some cases, the grafting agent can further include a functional group to impart some additional or new chemical or physical property to the CCB polymer. In some cases, the reactively melt-processed mixture includes two or more different polymers that are compatibilized via the grafting agent.

The present invention provides a resin composition for an underfill material, comprising a maleimide compound (A) and a secondary monoamino compound (B), wherein the secondary monoamino compound (B) has a boiling point of 120 C. or more.

Disclosed are methods of preparing thiol keratin-containing materials, comprising applying a mixture comprising one or more thiol compounds and a catalyst. Methods of preparing cross-linked keratin-containing materials by applying a mixture comprising one or more thiol compounds and an oxidizing agent are also disclosed. Methods of grafting monomeric and polymeric materials on keratin-containing materials to provide a covalent coating on keratin-containing materials are disclosed. A mixture comprising one or more thiol compounds is applied to the keratin-containing material sample. The keratin-containing material sample then comprises a plurality of free thiol groups. A monomer is optionally applied to the keratin-containing material sample to form a plurality of covalent bonds between the free thiol groups and the monomers. The disclosed grafting methods can be carried out with or without catalyst.