摘要:
A diblock copolymer system that self-assembles at very low molecular weights to form very small features is described. One polymer in the block copolymer contains silicon, and the other polymer is a polylactide. The block copolymer may be synthesized by a combination of anionic and ring opening polymerization reactions. This block copolymer may form nanoporous materials that can be used as etch masks in lithographic patterning.
摘要:
The invention relates to materials comprising siloxanes, preferably the materials have thermal-responsive properties. In some embodiments, the invention relates to silsesquioxane groups functionalized with polymers. In another embodiment, silsequioxane-polymer conjugates comprise polylactone segments. The silsequioxane-polymer conjugates may be crosslinked together to form a material, and these materials may be functionalized with bioactive compounds so that the materials have desirable biocompatibility or bioactivity when used in medical devices. In further embodiments, the invention relates to composite materials that contain a polymer matrix and aggregates, and in some embodiments, methods of making, and methods of using these materials. Preferably, the aggregates are calcium phosphate aggregates. Preferably, the material is resistant to fracture. In further embodiments, the materials are used in surgical procedures of bone replacement. In further embodiments, the materials contain polyhedral silsesquioxanes and/or biodegradable segments.
摘要:
Innovative polyester siloxane acrylates obtainable by reacting one or more organically modified polysiloxanes with one or more polyisocyanates having in each case at least two isocyanate groups and one or more polyester acrylates or polyester methacylates and their use as additives in radiation-curable coatings and printing inks for improving the resistance of the coating toward soiling of all kinds.
摘要:
In preparing bioabsorbable polyesters containing glycolic acid unit and/or lactic acid unit by the polymerization of glycolide and/or lactide, compositions comprising polyester-silicone copolymers obtained by conducting polymerization in the presence of silicones and the effect of merely mixing the above bioabsorbable polyesters with certain kind of silicones upon the modification, thereby attaining flexibility in particular, of the bioabsorbable polyesters, are disclosed.
摘要:
The present invention includes a diblock copolymer system that self-assembles at very low molecular weights to form very small features. In one embodiment, one polymer in the block copolymer contains silicon, and the other polymer is a polylactide. In one embodiment, the block copolymer is synthesized by a combination of anionic and ring opening polymerization reactions. In one embodiment, the purpose of this block copolymer is to form nanoporous materials that can be used as etch masks in lithographic patterning.
摘要:
Durable, transparent, inorganic-organic hybrid hydrophobic coating materials for glass, metal or plastic substrates are provided. The coating materials are generally an acid catalyzed condensation reaction product comprised of an organic polymeric silane (e.g., a polyol functionalized with a silane through a urethane linkage or a polyamine functionalized with a silane through a urea linkage, such as isocyanatopropyltrimethoxysilane or isocyanatopropyltriethoxysilane), an inorganic metal alkoxide (e.g., silicon alkoxides such as tetraethoxysilane or tetramethoxysilane) and a fluorinated silane (e.g., (3,3,3-trifluoropropyl)trimethoxysilane or nonafluorohexyltrimethoxysilane).
摘要:
Disclosed are a polysiloxane-modified polylactic acid resin, composition using same, molded article, and production method, whereby it is possible to produce a molded article via a simple method, and where said article may be used in applications demanding a high level of impact resistance as an alternative to ABS resin or the like, has a similar level of impact resistance as said substances, has superior flexibility with respect to rupture bending strain and tensile breaking strain, and has bleed resistance. The polysiloxane-modified polylactic acid resin has a segment which is a polylactic acid compound, and a segment which is an amino polysiloxane compound which has an amine group. With respect to the amino poly-siloxane compound, amine groups are on average contained in the range of 0.01 to 2.5% inclusive by mass, and with respect to the polylactic acid compound, are on average contained in the range of 3 to 300 ppm inclusive by mass.
摘要:
A silyl group-containing polymer which can be cured quickly and strongly, and from which a cured product excellent in antifouling properties and weather resistance while maintaining favorable rubber elasticity can be obtained, and having the following formula (1): wherein R1: a group having a hydroxyl group(s) removed from a monohydroxy or polyhydroxy compound having t hydroxyl group(s) in its molecule, R2: a bivalent organic group, R3: a C1-20 monovalent organic group which may have a substituent, X: a hydroxyl group or a hydrolysable group, Y: a bivalent group of the following formula (A) or (B), “a”: an integer of from 1 to 3, r: an integer of from 1 to 1,000, and t: an integer of from 1 to 8, provided that when the silyl group-containing polymer of formula (1) has a plurality of Y's in its molecule, the plurality of Y's may be the same or different, and when t is from 2 to 8, a plurality of monovalent groups bonded to R1 may be the same or different: in the formula (A), R4: a C2-8 alkylene group, and in the formula (B), R5: a C2-4 alkylene Group; and its production process.
摘要:
A self-polishing and/or antifouling coating composition comprising a binder, wherein the binder comprises a copolymer comprising (i) units of A and (ii) units of B and/or C: wherein R1 and R2 are each independently H, a C1-C6 alkyl group or phenyl, R3 is H, a C1-C6 alkyl group or phenyl, R4 is optional and, when present, is a C1-C3 alkylene group, R′3 is H, a C1-C6 alkyl group or phenyl, and R′4 is optional and, when present, is a C1-C3 alkylene group.
摘要:
The present invention includes a diblock copolymer system that self-assembles at very low molecular weights to form very small features. In one embodiment, one polymer in the block copolymer contains silicon, and the other polymer is a polylactide. In one embodiment, the block copolymer is synthesized by a combination of anionic and ring opening polymerization reactions. In one embodiment, the purpose of this block copolymer is to form nanoporous materials that can be used as etch masks in lithographic patterning.