The purpose of the present invention is to provide a resin composition which enables manufacturing an adhesive sheet for a electrostatic chuck which has excellent heat resistance, low elastic modulus, mitigates the substrate thermal expansion difference with a single layer, and is capable of adhesion and following. The resin composition contains a polymer (A) selected from polyimide and polyamic acid that have a diamine residue of a specific structure (below, the diamine residue (1)) and an acid anhydride residue of a specific structure (below, the acid anhydride residue (2)), and a thermosetting resin (B).

A foamable poly carbonate composition comprising 5 to 95 wt % of a poly(siloxane) block copolymer comprising a poly(carbonate-siloxane) comprising 50 to 99 wt % of bisphenol A carbonate units and 1 to 50 wt % of dimethylsiloxane units, each based on the weight of the poly(carbonate-siloxane), a poly(ester-carbonate-siloxane) comprising bisphenol A carbonate units, isophthalate-terephthalate-bisphenol A ester units, and 5 to 200 dimethyl siloxane units, or a combination thereof; 5 to 95 wt % of an auxiliary component comprising a poly(alkylene ester), a poly(ester-carbonate), or a combination thereof, and optionally, a homopolycarbonate; optionally, up to 10 wt % of an additive composition, wherein the composition has a glass transition temperature of 140 C. and below measured using differential scanning calorimetry, and wherein a foamed sample of the composition has an average cell size of 10 nanometers to 20 micrometers.

The present invention provides a stretchable film that is excellent in stretch and strength and water repellency on the film surface, and a method for forming the stretchable film. The present invention was accomplished by a stretchable film including a resin having a branched siloxane bond having 3 to 11 silicon atoms on a side chain and having a urethane bond on a main chain.

An epoxy-based insulation material and a method of thermally insulating a subsea production apparatus are disclosed. The epoxy-based insulation material has an amine-cured epoxy elastomer matrix and a plurality of non-metallic beads suspended in the matrix. The epoxy-based insulation material is located on the subsea production apparatus to thermally insulate a hydrocarbon fluid from sea water.

A composition includes specific amounts of a copolycarbonate and a roughening agent. The copolycarbonate contains first carbonate units derived from a first bisphenol monomer such that a homopolycarbonate of the first bisphenol monomer has a glass transition temperature less than 155? C., and second carbonate units derived from a second bisphenol monomer such that a homopolycarbonate of the second bisphenol monomer has a glass transition temperature of 155? C. or higher. The roughening agent includes a particulate crosslinked polymethylsilsesquioxane having a median equivalent spherical diameter greater than 5 micrometers and less than or equal to 10 micrometers.

The present invention relates to the manufacture of a new class of hybrid aerogels with a 3-D reticulated structure. First, the organic and inorganic components of the structure are distributed on a molecular level in such a way that all of the organic components of the precursor are chemically bonded to each other and to the inorganic component. Second, in the new hybrid aerogels, the pores are separated by solid walls like reticulated open-cell foams without the particulate solid parts and also the present invention is a process for preparing a hybrid aerogel without aging step having a nonparticulate-reticulated structure comprises of a polymeric precursor that is crosslinked by a linkage without forming particulate structure.

The present invention discloses a method for preparing a polyimide film having a low dielectric constant and high fracture toughness. The method comprises: first preparing an aromatic diamine solution, and then grinding and well mixing a carbic anhydride-maleimido heptaisobutyl polysilsesquioxane alternating copolymer and aromatic dianhydride; adding the mixture to the aromatic diamine solution, and then stirring to obtain a carbic anhydride-maleimido heptaisobutyl polysilsesquioxane alternating copolymer/polyamide acid solution; uniformly applying the carbic anhydride-maleimido heptaisobutyl polysilsesquioxane alternating copolymer/polyamide acid solution to a clean glass sheet, and then placing the glass sheet in a vacuum drying cabinet for treatment; cooling the treated glass sheet to room temperature and then putting same in water for ultrasonic peeling of a film, and vacuum drying the film to obtain a target product. The dielectric constant of the film obtained in the present invention is reduced to 2.2, the breaking elongation is increased by 272%, and the tensile energy is increased by 285%, so that the breaking elongation and tensile energy are greatly increased, and thus the fracture toughness is good.

The present invention relates polysiloxane based aerogels obtained by reacting a functionalised poly(dimethylsiloxane) oligomer and an aliphatic or aromatic isocyanate compound in a presence of a catalyst and a solvent. A polysiloxane based aerogels according to the present invention provide high thermal insulation material, while good mechanical properties and performance is maintained.

A composition includes specific amounts of a copolycarbonate and a roughening agent. The copolycarbonate contains first carbonate units derived from a first bisphenol monomer such that a homopolycarbonate of the first bisphenol monomer has a glass transition temperature less than 155? C., and second carbonate units derived from a second bisphenol monomer such that a homopolycarbonate of the second bisphenol monomer has a glass transition temperature of 155? C. or higher. The roughening agent includes a particulate crosslinked polymethylsilsesquioxane having a median equivalent spherical diameter greater than 5 micrometers and less than or equal to 10 micrometers.

An aqueous polyorganosiloxane hybrid resin dispersion can include at least one polyorganosiloxane hybrid resin, at least one amphiphilic emulsifier, and water.