A downhole tool that has a high initial compressive strength, can maintain compressive strength for a certain period of time, and is rapidly degradable after use. The downhole tool is formed from a degradable resin composition containing a polyamide resin and a carboxylic acid anhydride, and the carboxylic acid anhydride is a compound satisfying the following melting point condition:
melting point of polyamide resin≤5% weight reduction temperature of carboxylic acid anhydride.

The invention relates to a process for preparing a precipitated silica, to precipitated silicas, and to uses thereof. The process of the invention generally includes reacting a silicate with an acidifying agent, so as to obtain a suspension of precipitated silica; filtering the precipitated silica to obtain a filter cake; subjecting the filter cake to a liquefaction operation to form a second filter cake; and drying the second filter cake. In the process of the invention, at least one polycarboxylic acid is added to the filter cake, during or after the liquefaction operation

The invention relates to a process for preparing a precipitated silica, to precipitated silicas, and to uses thereof. The process of the invention generally includes reacting a silicate with an acidifying agent, so as to obtain a suspension of precipitated silica; filtering the precipitated silica to obtain a filter cake; subjecting the filter cake to a liquefaction operation to form a second filter cake; and drying the second filter cake. In the process of the invention, at least one polycarboxylic acid is added to the filter cake, during or after the liquefaction operation

Cyanoacrylate-containing compositions that include, in addition to the cyanoacrylate component, an anhydride and a toughening agent comprising a co-polymer of polyvinyl chloride and polyvinyl acetate are provided.

Cyanoacrylate-containing compositions that include, in addition to the cyanoacrylate component, an anhydride and a toughening agent comprising a co-polymer of polyvinyl chloride and polyvinyl acetate are provided.

A glass fiber-reinforced polyolefin resin material, containing: a glass fiber; and a thermoplastic resin, wherein said thermoplastic resin contains: at least, a specific graft-modified polypropylene, wherein, with respect to the graft-modified polypropylene, each specific amounts of the glass fiber and a compound or polymer having an acid anhydride structure are contained, and wherein, in the content of a graft-modification component in the graft-modified polypropylene, the content of a component obtained from the (meth)acrylate containing an epoxy group is 0.5 or more and 10 or less parts by mass with respect to 100 parts by mass of said polypropylene, and a component obtained from the aromatic vinyl compound has a mass equal to or less than said component obtained from the (meth)acrylate; a composition for said resin material; a method of producing the same; and a composite.

A glass fiber-reinforced polyolefin resin material, containing: a glass fiber; and a thermoplastic resin, wherein said thermoplastic resin contains: at least, a specific graft-modified polypropylene, wherein, with respect to the graft-modified polypropylene, each specific amounts of the glass fiber and a compound or polymer having an acid anhydride structure are contained, and wherein, in the content of a graft-modification component in the graft-modified polypropylene, the content of a component obtained from the (meth)acrylate containing an epoxy group is 0.5 or more and 10 or less parts by mass with respect to 100 parts by mass of said polypropylene, and a component obtained from the aromatic vinyl compound has a mass equal to or less than said component obtained from the (meth)acrylate; a composition for said resin material; a method of producing the same; and a composite.

Embodiments relate to a heat-resistant resin composition having an enhanced heat resistance and a molded article obtained therefrom. The resin composition according to the embodiments has a high heat resistance, so that it is capable of forming an excellent appearance without being deformed even though it is subjected to a process that is carried out at a high temperature of 205° C. or higher, such as an on-line painting. Thus, it can be advantageously used as, for example, an exterior material of various transportation means or a housing of electric and electronic products.

Embodiments relate to a heat-resistant resin composition having an enhanced heat resistance and a molded article obtained therefrom. The resin composition according to the embodiments has a high heat resistance, so that it is capable of forming an excellent appearance without being deformed even though it is subjected to a process that is carried out at a high temperature of 205° C. or higher, such as an on-line painting. Thus, it can be advantageously used as, for example, an exterior material of various transportation means or a housing of electric and electronic products.

A downhole tool that has a high initial compressive strength, can maintain compressive strength for a certain period of time, and is rapidly degradable after use. The downhole tool is formed from a degradable resin composition containing a polyamide resin and a carboxylic acid anhydride, and the carboxylic acid anhydride is a compound satisfying the following melting point condition:

melting point of polyamide resin≤5% weight reduction temperature of carboxylic acid anhydride.