The present invention relates to a composition comprising: at least one copolymer of which at least one of the repeating units comprises at least one amide function; and at least one polyether having a molecular weight (Mw) greater than 60 g.mol.sup.-1. The invention also relates to the use of said composition for delaying, or even preventing, the formation of gas hydrates, in particular in a method for extracting oil and/or gas and/or condensates, as well as to the method for delaying, or even preventing, the formation and/or agglomeration of gas hydrates, using a composition as defined above.

The present invention relates to a composition comprising: at least one copolymer of which at least one of the repeating units comprises at least one amide function; and at least one polyether having a molecular weight (Mw) greater than 60 g.mol.sup.-1. The invention also relates to the use of said composition for delaying, or even preventing, the formation of gas hydrates, in particular in a method for extracting oil and/or gas and/or condensates, as well as to the method for delaying, or even preventing, the formation and/or agglomeration of gas hydrates, using a composition as defined above.

The present invention provides a polyethylene glycol derivative comprising a repeat unit having the structure of Formula (I) and a terminal group having the structure of Formula (II). The polyethylene glycol derivative provided by the present invention has good biocompatibility, due to the repeat unit having the structure of Formula (I); and can react with various groups such as amino, (acyl)hydrazino, and aminooxy with a fast reaction rate under mild reaction conditions, due to the o-phthalaldehyde terminal group having the structure of Formula (II). The polyethylene glycol derivative provided by the present invention is mixed with polyethylene glycol having an amino-containing terminal group in an aqueous medium, to rapidly form a chemically cross-linked hydrogel material. The hydrogel material has mild preparation conditions, fast gel-forming speed, high mechanical strength, and good stability. This polyethylene glycol hydrogel can be applied as drug sustained-release carrier, tissue engineering scaffold, etc. in the field of biomedical materials.

The present invention provides a polyethylene glycol derivative comprising a repeat unit having the structure of Formula (I) and a terminal group having the structure of Formula (II). The polyethylene glycol derivative provided by the present invention has good biocompatibility, due to the repeat unit having the structure of Formula (I); and can react with various groups such as amino, (acyl)hydrazino, and aminooxy with a fast reaction rate under mild reaction conditions, due to the o-phthalaldehyde terminal group having the structure of Formula (II). The polyethylene glycol derivative provided by the present invention is mixed with polyethylene glycol having an amino-containing terminal group in an aqueous medium, to rapidly form a chemically cross-linked hydrogel material. The hydrogel material has mild preparation conditions, fast gel-forming speed, high mechanical strength, and good stability. This polyethylene glycol hydrogel can be applied as drug sustained-release carrier, tissue engineering scaffold, etc. in the field of biomedical materials.

The present invention provides a UV curable composition, a UV curable adhesive film and a UV curable adhesive tape. The UV curable composition comprises, based on the total weight thereof as 100 wt %: 25 to 60 wt % of an ethylene-vinyl acetate copolymer; 20 to 60 wt % of an epoxy resin; 5 to 20 wt % of glass bubbles; 0.3 to 8 wt % of a hydroxy-containing compound; and 0.5 to 5 wt % of a photoinitiator. According to the technical solution of the present invention, cohesive failure can be achieved in the cured adhesive film by the addition of glass bubbles into the UV curable system. The UV curable product provided in the present invention can achieve a good balance among the initial adhesivity, structural strength after curing, odorlessness or low odor, and other performance.

The present invention provides a UV curable composition, a UV curable adhesive film and a UV curable adhesive tape. The UV curable composition comprises, based on the total weight thereof as 100 wt %: 25 to 60 wt % of an ethylene-vinyl acetate copolymer; 20 to 60 wt % of an epoxy resin; 5 to 20 wt % of glass bubbles; 0.3 to 8 wt % of a hydroxy-containing compound; and 0.5 to 5 wt % of a photoinitiator. According to the technical solution of the present invention, cohesive failure can be achieved in the cured adhesive film by the addition of glass bubbles into the UV curable system. The UV curable product provided in the present invention can achieve a good balance among the initial adhesivity, structural strength after curing, odorlessness or low odor, and other performance.

A curable composition containing: a compound represented by the following formula (1):

##STR00001##

wherein R.sup.11 and R.sup.12 each independently represent a hydrogen atom or a methyl group, and R.sup.13 represents a divalent group having a polyoxyalkylene chain; and a thermally conductive filler.

A curable composition containing: a compound represented by the following formula (1):

##STR00001##

wherein R.sup.11 and R.sup.12 each independently represent a hydrogen atom or a methyl group, and R.sup.13 represents a divalent group having a polyoxyalkylene chain; and a thermally conductive filler.

Provided are compositions that can be employed for generating microporous gel systems. In some embodiments, the compositions include at least one sub-population of soft hydrogel microparticles with a Youngs modulus of less than 50 kPa and at least one sub-population of stiff hydrogel microparticles with a Young's modulus of greater than 90 kPa. Also provided are methods for generating the compositions, methods for treating bone and/or cartilage defects in subject using the disclosed compositions, methods for treating osteoarthritis using the disclosed compositions, and methods for providing orthopedic implants to subjects.

Provided are compositions that can be employed for generating microporous gel systems. In some embodiments, the compositions include at least one sub-population of soft hydrogel microparticles with a Youngs modulus of less than 50 kPa and at least one sub-population of stiff hydrogel microparticles with a Young's modulus of greater than 90 kPa. Also provided are methods for generating the compositions, methods for treating bone and/or cartilage defects in subject using the disclosed compositions, methods for treating osteoarthritis using the disclosed compositions, and methods for providing orthopedic implants to subjects.