A composition comprising; a) at least one homopolymer or copolymer of vinyl acetate; and b) at least one softener.

A low-modulus high-adhesion silane-modified polyether sealant for prefabricated buildings is provided by including a composition A and a composition B, wherein the composition A includes silane-modified polyether, plasticizer, hydroxy-terminated branched polyether, branched polyether epoxy resin, coupling agent, thixotropic agent, silica, reinforcing filler A, hollow glass microspheres and toner, and the composition B includes plasticizer, hydroxy-terminated branched polyether, light stabilizer, reinforcing filler B, organotin catalyst and amine curing agent. The present disclosure also optimized the various ingredients in the silane-modified polyether sealant, and a formulation of sealant having the best bonding effect was obtained. The two-composition polyether sealant system has good compatibility, greatly improves the adhesive properties thereof, achieves a good adhesion and waterproofing effect without needing to be used with a priming coating, and also avoids the risk of water leakage caused by misoperation in the applying of the priming coating existing in the prior art.

The invention relates to an amine terminated prepolymer and to a curable composition containing this prepolymer. These compositions are used to make sealants, coatings or adhesives useful in the field of construction, public works and civil engineering.

Provided is a composition for a gas seal member that can form a gas seal member for a high-pressure hydrogen device that is capable of sufficiently inhibiting both swelling destruction and blister destruction. The composition for a gas seal member is a composition for a gas seal member used in a high-pressure hydrogen environment and contains an elastomer and fibrous carbon nanostructures. The fibrous carbon nanostructures are contained in a proportion of not less than 1 part by mass and not more than 10 parts by mass per 100 parts by mass of the elastomer. An area fraction S (%) of aggregates of the fibrous carbon nanostructures in a cross-section of the composition for a gas seal member and a volume percentage V (volume %) of the fibrous carbon nanostructures in the composition for a gas seal member satisfy a relationship 0≤S/V≤2.0.

The present disclosure provides an ethylene acrylate rubber composition which has all of oil resistance, heat resistance and hydrolysis resistance with good balance after molding and cross-linking, and a molded article formed of a cross-linked substance of the ethylene acrylate rubber composition. The ethylene acrylate rubber composition contains 100 parts by mass of an ethylene acrylate rubber, 10 to 50 parts by mass of a plasticizer with an SP value of 7 or more and 0.05 to 30 parts by mass of a cross-linking agent selected from polyvalent aliphatic primary amine or derivatives thereof. The content of a plasticizer with an SP value of less than 7 in the ethylene acrylate rubber is less than 0.1 parts by mass. Further, a molded article formed of a cross-linked product of the ethylene acrylate rubber composition is provided.

Provided is a graphene foam-based sealing material comprising: (a) a graphene foam framework comprising pores and pore walls, wherein the pore walls comprise a 3D network of interconnected graphene planes or graphene sheets; and (b) a permeation-resistant binder or matrix material that coats and embraces the exterior surfaces of the graphene foam framework and/or infiltrates into pores of the graphene foam, occupying from 10% to 100% (preferably from 10% to 98% and more preferably from 20% to 90%) of the pore volume of the graphene foam framework.

The purpose is to provide a resin composition and a film for lid material which excel in sealability and adhesiveness to plastic containers, especially containers made of polyethylene terephthalate, polylactic acid, polystyrene, or polypropylene, and are suitably usable as sealant layers of lid materials for containers. Provided is a resin composition including: an ethylene-vinyl acetate copolymer (A) by 60-95 parts by weight, the ethylene-vinyl acetate copolymer (A) having a vinyl acetate content (VA) of 3-13% by weight, and having a ratio Qw between a weight-average molecular weight (Mw) and a number-average molecular weight (Mn) of 1.5-4.5; and a tackifier resin (B) by 5-40 parts by weight, where a total amount of (A) and (B) is 100 parts by weight.

The present invention aims to provide a resin composition containing a cyanate ester compound which can reduce the formation of carbamate compounds so that the resin composition can be suitably used as an sealing material. The present invention relates to a curable resin composition containing a cyanate ester compound and a dehydrating agent.

A method for producing a sealant includes a weighing and mixing step, a kneading step, a stirring and defoaming step, and a filling step. In the weighing and mixing step, a main component and a curing agent are weighed and mixed together. In the kneading step, the mixture mixed in the weighing and mixing step is kneaded. In the stirring and defoaming step, the kneaded product kneaded in the kneading step is stirred and defoamed. In the filling step, the kneaded product defoamed in the stirring and defoaming step is filled into a container. In the stirring and defoaming step, the kneaded product is stirred under a condition wherein a stirring rotational speed at which the kneaded product is stirred and a stirring time for which the kneaded product is stirred are within a range from an arithmetic product lower limit value to an arithmetic product upper limit value.

Anaerobic paste compositions and uses are disclosed. The anaerobic paste compositions remain stable at room temperature for a prolong time without phase separating, making these compositions particularly well suited for long term storage and exposure to extreme temperatures as anaerobic tubular thread sealants compositions.