A composition is provided for making a polyurethane that may be incorporated in various products, such as a sealant, a coating, a caulk, an electric potting compound, a membrane, a sponge, a foam, an adhesives, and a propellant binder. The composition includes one or more polyols, one or more isocyanate-group containing compounds having an isocyanate group functionality of at least two, and optionally one or more chain extenders. At least one of the polyols is a farnesene-based polyol having a number average molecular weight less than or equal to 100,000 g/mol and a viscosity at 25 C. less than 10,000 cP. The farnesene-based polyol may be a homopolymer or a copolymer of farnesene. The composition may also comprise additional polyols, such as a polyol of a homopolymer or copolymer of a polydiene. Methods of preparing a polyurethane are also provided.

A pencil lead includes an organic-inorganic hybrid resin imide fine pores of a porous lead body colorant may also be included inside the fine pores. The organic-inorganic hybrid resin is preferably a silica-organic hybrid resin.

A pencil lead includes an organic-inorganic hybrid resin imide fine pores of a porous lead body colorant may also be included inside the fine pores. The organic-inorganic hybrid resin is preferably a silica-organic hybrid resin.

Reversible thermochromic and photochromic ink compositions and markers, pens or writing instruments that use them are herein disclosed.

The invention relates to a biodegradable and/or compostable core or crayon for writing, drawing, and/or cosmetic purposes containing at least one fatty acid ester, at least one metal soap and/or soap, and at least one colorant, wherein the at least one fatty acid ester and the at least one metal soap and/or soap are included in a total proportion of 33 to 90 wt. %.

The invention furthermore relates to a pencil comprising such a core and to a method for producing such a core or crayon.

The invention relates to a biodegradable and/or compostable core or crayon for writing, drawing, and/or cosmetic purposes containing at least one fatty acid ester, at least one metal soap and/or soap, and at least one colorant, wherein the at least one fatty acid ester and the at least one metal soap and/or soap are included in a total proportion of 33 to 90 wt. %.

The invention furthermore relates to a pencil comprising such a core and to a method for producing such a core or crayon.

An active stylus having physical writing function includes a tip shell including a first opening and a second opening, a first electrode including a first end protruded through the first opening of the tip shell and including a second end protruded through the second opening of the tip shell and entered a main body housing of the active stylus, wherein the first electrode includes conductive material. The tip shell includes non-conductive material. The first end of the first electrode is configured to leave colored traces on an object by physical friction caused between the first end of the first electrode and the object.

A seed-containing crayon is presented. The crayon includes an elongated member formed of a marking composition to leave a colored mark on a surface when the elongated member contacts the surface. The marking composition is formed of a wax, a pigment, and a plant nutrient that is activated by application of water to the elongated member. Plant seeds are embedded in the marking composition of the elongated member. The crayon can include a paper band that at least partially surrounds the elongated member along at least part of the length of the elongated member in which the plant seeds are embedded.

A seed-containing crayon is presented. The crayon includes an elongated member formed of a marking composition to leave a colored mark on a surface when the elongated member contacts the surface. The marking composition is formed of a wax, a pigment, and a plant nutrient that is activated by application of water to the elongated member. Plant seeds are embedded in the marking composition of the elongated member. The crayon can include a paper band that at least partially surrounds the elongated member along at least part of the length of the elongated member in which the plant seeds are embedded.

Reversible thermochromic and photochromic ink compositions and markers, pens or writing instruments that use them are herein disclosed.