Heat-expandable microspheres having an expansion temperature which can be decreased by a simple means without changing the polymerizable monomer and its ratio and/or changing the blowing agent and its ratio, and applications thereof. The heat-expandable microspheres are composed of a thermoplastic resin shell and a core material encapsulated therein. The core material contains a thermally-vaporizable blowing agent which imparts a swelling degree of less than 5% as defined by the following formula (I) and a component (A) which imparts a swelling degree of 5 to 30% as defined by the following formula (I), wherein an amount of the component (A) ranges from 0.0001 to 30 parts by weight to 100 parts by weight of the blowing agent:
Swelling degree (%)={(M.sub.2M.sub.1)/M.sub.1}100(I)
wherein M.sub.2 and M.sub.1 are as defined herein.

The present invention, belonging to the technical field of chemical sun-screening agent preparation, discloses a high-ultraviolet absorption lignin/chemical sun-screening agent microcapsule using lignin as a wall material and a preparation method therefor. The method of the present invention comprises the following steps: (1) dissolving 1-20 parts by weight of lignin in 100-200 parts by weight of an aqueous solution with a pH of 12, adjusting the pH of the solution to 7-10, and then removing insoluble substances by filtration to obtain a lignin solution; and (2) mixing 10-50 parts by weight of the lignin solution in step (1) with 1-10 parts by weight of a chemical sun-screening agent, and performing ultrasonic radiation under a power of 200-1500 W for 10 s to 25 min to obtain a lignin/chemical sun-screening agent microcapsule emulsion. The lignin/chemical sun-screening agent microcapsule of the present invention has excellent ultraviolet absorption performance, can avoid photodegradation of the chemical sun-screening agent, and has good stability; and it effectively prevents the chemical sun-screening agent from directly contacting and hurting the skin, having great application prospects in the field of sun-screening skincare products.

Provided are a microcapsule encapsulating a solvent, the solvent having a solubility parameter of greater than or equal to 8 (cal/cm.sup.3).sup.1/2 and less than 10 (cal/cm.sup.3).sup.1/2 and a molecular weight of from 425 to 3,000; and a method for producing the microcapsule.

The present disclosure provides materials and articles of clothing including a plurality of nanocapsules, each nanocapsule including a polymeric shell surrounding at least one fluid, and a plurality of polymeric fibers co-spun with the plurality of nanocapsules. The nanocapsules can be made by miniemulsion polymerization. The encapsulated at least one fluid can include at least one essential oil. In some embodiments, the materials are deodorizing, antifungal, and/or antibacterial. Methods of manufacturing the materials and articles of clothing are also provided.

Hollow particles which comprise a shell containing a resin and a hollow portion surrounded by the shell, wherein a void ratio is 50% or more; wherein a volume average particle diameter is 1.0 ?m or more; wherein the shell contains, as the resin, a polymer in which 70 parts by mass to 100 parts by mass of a crosslinkable monomer unit is contained in 100 parts by mass of all monomer units; wherein a thermal expansion coefficient at 80? C. to 200? C. is 10.0?10.sup.?5/? C. or less; and wherein, in a hollow particle immersion test in which a mixture obtained by adding 0.1 mg of the hollow particles to 4 mL of acetone and shaking them for 10 minutes at a shaking rate of 100 rpm, is left to stand for 48 hours in an environment at 25? C., less than 10% by mass of the hollow particles submerge in the acetone.

To provide a weight-reduced, fiber-reinforced molded body. A fiber-reinforced molded body comprising a matrix resin, reinforcing fibers and hollow particles, wherein the hollow particles comprise a shell containing a resin and a hollow portion surrounded by the shell; wherein the shell contains, as the resin, a polymer in which from 80 parts by mass or more of a crosslinkable monomer unit is contained in 100 parts by mass of all monomer units; and wherein, in a hollow particle immersion test in which a mixture obtained by adding 0.1 mg of the hollow particles to 4 mL of acetone and shaking them for 10 minutes at a shaking rate of 100 rpm, is left to stand for 48 hours in an environment at 25? C., less than 5% by mass of the hollow particles submerge in the acetone.

Populations of benefit agent delivery particles are disclosed, the particles having a core and a polymer wall surrounding the core, the polymer wall comprising multifunctional (meth)acrylate-based polymers, along with processes for making and uses of such compositions, and articles made with such particles. The polymer wall comprises a (meth)acrylate polymer derived, at least in part, from wall monomers and at least one free radical initiator, wherein the wall monomers comprise at least 50%, by weight of the wall monomers, of (meth)acrylate monomers, wherein the at least one free radical initiator is present at a level of from about 15% to about 60%, by weight of the polymer wall, wherein the core comprises a benefit agent, wherein the core and the polymer wall are present in a weight ratio of from about 95:5 to about 99.5:0.5. The compositions deliver core content with a desired delivery profile.

The present invention discloses a thermosensitive nanocapsule and a preparing method thereof. The thermosensitive nanocapsule includes core materials and wall materials. The preparing method includes: first, making water phase and oil phase respectively, forming microemulsion by means of high speed shearing after mixing, and forming nanoemulsion via ultrasonic treatment or high pressure homogenization; then adding nitrogen to the emulsion and carrying out the reaction under a temperature of 40-80 C. for 3-4 hrs in the nitrogen atmosphere; finally obtaining the thermosensitive nanocapsule with an embedding rate of 90-94%, a particle size of less than 150 nm and a dimension polydispersity index of 0.09-0.17. In present invention, the monomer that forms the wall material of the nanocapsules is made from common biological materials, and has a good biocompatibility. The wall material has a temperature sensitivity, and can control the delayed release of core material by adjusting temperature.

Self-healing mircrocapsules including: a) a polymeric shell; b) a healing-agent compartmentalized inside the polymeric shell; and c) a catalyst deposited on the surface of the polymeric shell; where the microcapsules are prepared by suspension polymerization, and the microcapsules may be present in a polymeric matrix and in composite materials that include such polymeric matrix.

Provided is a composition for a non-aqueous secondary battery functional layer capable of forming a functional layer that can provide a battery member such as an electrode or a separator with both excellent blocking resistance and excellent process adhesiveness. The composition for a functional layer contains a particulate polymer A. The particulate polymer A has a core-shell structure including a core portion and a shell portion that at least partially covers an outer surface of the core portion. The core portion is formed from a polymer having a glass-transition temperature of higher than 25 C. and lower than 80 C. The shell portion is formed from a polymer having a glass-transition temperature of 80 C. to 25 C. The proportion constituted by the core portion among the total of the core portion and the shell portion is 30 mass % to 80 mass %.