An object of the invention is to provide a composition having excellent heat resistance and excellent adhesiveness. Moreover, another object is to provide a cured product obtained by curing the composition and a laminate containing the cured product. Furthermore, another object is to provide a heat-resistant material, a heat-resistant member, an electronic material and an electronic member each containing the composition. The objects are achieved by providing a composition including: a (meth)allyl group-containing maleimide compound having a structure having one or more benzene rings, one or more groups having a (meth)allyl group and one or more groups having a maleimide group; and a hydroxy group-containing maleimide compound having a structure having one or more benzene rings, one or more groups having a hydroxy group and one or more maleimide groups.

A hydrogel 1 having a laminate structure of layer A 10 and layer B 20, wherein layer A 10 contains a monomer-derived component, water, a humectant, a water-insoluble polymer having tackiness and an amphiphilic polymer, the water-insoluble polymer is contained in a proportion of 3 to 20 wt % based on a total amount of layer A, and the amphiphilic polymer is a polyvinyl alcohol having a saponification degree of 50 to 75% and is contained in a proportion of 0.05 to 5 wt % based on the total amount of layer A; layer B 20 contains a monomer-derived component, water and a humectant and is substantially free of a water-insoluble polymer having tackiness and a polyvinyl alcohol; and an amount of the water based on a total amount of layer B is the amount of water based on the total amount of layer A10 wt %.

The present disclosure discloses a method of manufacturing silicon dioxide nanoparticles modified by a polymer containing phosphorus and nitrogen, which relates to organic/inorganic hybrid nanoparticles, dispersing SiO.sub.2 in an organic solvent, then adding THPS, stirring, and finally adding p-phenylenediamine, reacting, centrifuging, washing, and drying to obtain silicon dioxide nanoparticles modified by a polymer containing phosphorus and nitrogen. The silicon dioxide nanoparticles modified by the polymer containing phosphorus and nitrogen have effects in flame retardancy, strengthening effect of polymer matrixes, and are expected to be widely used in the halogen-free synergistic flame retardancy of polymer materials.

The present disclosure relates to a modified bismaleimide prepolymer, a preparation method thereof, and use thereof. The modified bismaleimide prepolymer is prepared from raw materials comprising a bismaleimide resin and a modifier. The modifier is a 4,4-bis(allyl-benzoic acid) biphenyl ester-based allyl compound, or a combination of the 4,4-bis(allyl-benzoic acid) biphenyl ester-based allyl compound and another type of bismaleimide resin modifier.

A prepreg is provided. The prepreg includes sizing agent-coated carbon fibers and a thermosetting resin composition (B) impregnated between the sizing agent-coated carbon fibers. The sizing agent includes a reactive component (A) having at least three reactive groups per molecule: (i) two or more first functional groups capable of reacting with the thermosetting resin composition (B), and (ii) at least one second functional group different from the two or more first functional groups (i). The second functional group includes at least one of amide, imide, urethane, urea, carbonyl, ester, sulfonyl, aromatic ring, or combinations thereof. The thermosetting resin composition (B) includes at least one thermosetting resin other than an epoxy resin and has a glass transition temperature of 220 C. or more after being cured.

A polymer-encapsulated pigment dispersion is prepared from a mixture of (a) a carrier; (b) pigment particles; and (c) a polymeric dispersing agent having a polymer backbone, and an alkali-swellable copolymer component. The dispersing agent may provide efficient pigment wetting and dispersion using relatively low and thus economical dispersant amounts, and subsequently enable formation of polymer-encapsulating pigment dispersions that, when used in coatings, provide good opacity and good hiding characteristics, especially in titanium dioxide-containing coating compositions.

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.

A functional polymer membrane of the present invention contains a polymer containing at least a structure represented by the following Formula (I), a method for producing the membrane, and an ion exchange apparatus: ##STR00001##
wherein R.sup.1 and R.sup.2 each represent a hydrogen atom or an alkyl group; R.sup.3 to R.sup.6 each represent a substituent; R.sup.3 to R.sup.6 may be bonded to each other and form a ring; A.sup.1 to A.sup.4 each represent a single bond or a divalent linking group; M.sup.1 represents a hydrogen ion, an organic base ion, or a metal ion; J.sup.1 represents a single bond, O, S, SO.sub.2, CO, CR.sup.8R.sup.9, or an alkenylene group, and R.sup.8 and R.sup.9 each represent a hydrogen atom, an alkyl group, or a halogen atom; and k1, k2, k3, k4, n1, n2, m1, m2, p, and q each represent a particular integer.

The present invention relates to a maleimide resin composition containing (A) one or more selected from the group consisting of a maleimide compound having one or more N-substituted maleimide groups and a derivative thereof; and (B) a polymer having a hydrocarbon chain or a polyether chain in a main chain thereof, wherein the component (A) contains (A1) a maleimide compound having one or more N-substituted maleimide groups and a molecular weight of less than 600 and (A2) a maleimide compound having one or more N-substituted maleimide groups and a molecular weight of 600 or more. The present invention also relates to a prepreg, a laminated board, a resin film, a printed wiring board, and a semiconductor package that are obtained by using the maleimide resin composition.

A membrane obtainable from curing a composition comprising: (i) a curable compound comprising at least two (meth)acrylic groups and a sulphonic acid group and having a molecular weight which satisfies the equation:
MW<(300+300n) wherein: MW is the molecular weight of the said curable compound; and n has a value of 1, 2, 3 or 4 and is the number of sulphonic acid groups present in the said curable compound; and optionally (ii) a curable compound having one ethylenically unsaturated group; wherein the molar fraction of curable compounds comprising at least two (meth)acrylic groups, relative to the total number of moles of curable compounds present in the composition, is at least 0.25.