The present invention relates to a novolac-type phenolic resin synthesis process in which there is the addition of lignin, to a novolac-type phenolic resin comprising lignin, and to the use of said phenolic resin.

The invention relates to an in-situ process for preparing an alkylphenol-aldehyde resin. The process comprises the step of providing a raw alkylphenol composition. The raw alkylphenol composition comprises one or more alkylphenol compounds and at least about 1 wt % phenol. Each alkylphenol compound has one or more alkyl substituents. The raw alkylphenol composition is reacted directly, without pre-purification, with one or more aldehydes to form an in-situ alkylphenol-aldehyde resin. The invention also relates to an in-situ alkylphenol-aldehyde resin formed from the in-situ process, and its use in a tackifier composition and rubber composition. The tackifier composition and rubber composition containing the in-situ alkylphenol-aldehyde resin show, inter alia, improved tack performance.

The invention relates to an in-situ process for preparing an alkylphenol-aldehyde resin. The process comprises the step of providing a raw alkylphenol composition. The raw alkylphenol composition comprises one or more alkylphenol compounds and at least about 1 wt % phenol. Each alkylphenol compound has one or more alkyl substituents. The raw alkylphenol composition is reacted directly, without pre-purification, with one or more aldehydes to form an in-situ alkylphenol-aldehyde resin. The invention also relates to an in-situ alkylphenol-aldehyde resin formed from the in-situ process, and its use in a tackifier composition and rubber composition. The tackifier composition and rubber composition containing the in-situ alkylphenol-aldehyde resin show, inter alia, improved tack performance.

The present invention relates to a method for increasing the reactivity of lignin which method comprises the following steps; providing a mixture comprising lignin and an alkali solution wherein the concentration of the alkali solution of the mixture is between 5-50% by weight, storing said mixture for a period of at least 1 day whereby the reactivity of the lignin is increased. The present invention also relates to a resin composition comprising said lignin and use of said resin composition.

The present invention relates to a method for increasing the reactivity of lignin which method comprises the following steps; providing a mixture comprising lignin and an alkali solution wherein the concentration of the alkali solution of the mixture is between 5-50% by weight, storing said mixture for a period of at least 1 day whereby the reactivity of the lignin is increased. The present invention also relates to a resin composition comprising said lignin and use of said resin composition.

The subject matter of the present invention consists of formo-phenolic resins, a method for the preparation thereof, and the use of same in the extraction of uranium from an aqueous sample. The present invention also relates to novel formo-phenolic resins.

The subject matter of the present invention consists of formo-phenolic resins, a method for the preparation thereof, and the use of same in the extraction of uranium from an aqueous sample. The present invention also relates to novel formo-phenolic resins.

A composition contains: an aromatic ring-containing compound; a fluorine atom-containing polymer; and an organic solvent. The fluorine atom-containing polymer has: a first structural unit represented by formula (1); and a second structural unit represented by formula (2). In the formula (1), R.sup.1 represents a fluorine atom-containing monovalent organic group having 1 to 20 carbon atoms; and R.sup.2 represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 20 carbon atoms. In the formula (2), R.sup.3 represents a monovalent hydrocarbon group having 1 to 20 carbon atoms; and R.sup.4 represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 20 carbon atoms.

##STR00001##

A composition contains: an aromatic ring-containing compound; a fluorine atom-containing polymer; and an organic solvent. The fluorine atom-containing polymer has: a first structural unit represented by formula (1); and a second structural unit represented by formula (2). In the formula (1), R.sup.1 represents a fluorine atom-containing monovalent organic group having 1 to 20 carbon atoms; and R.sup.2 represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 20 carbon atoms. In the formula (2), R.sup.3 represents a monovalent hydrocarbon group having 1 to 20 carbon atoms; and R.sup.4 represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 20 carbon atoms.

##STR00001##

The present invention relates to a phenol-based resin adhesive from lignin pyrolysis, comprising a polymer of phenol and formaldehyde from lignin pyrolysis, wherein the phenol from lignin pyrolysis comprises at least two phenols from lignin pyrolysis or at least two lignin-modified phenols from lignin pyrolysis. A repeat unit of the polymer of phenol and formaldehyde from lignin pyrolysis comprises at least two phenol units from lignin pyrolysis or at least two lignin-modified phenol units from lignin pyrolysis. According to the phenol-based resin adhesive from lignin pyrolysis in the present invention, by-products during the pyrolysis of lignin for power generation are used as raw materials, so it is environment-friendly and economical.