Abstract:
A rapid, batch Koch carbonylation/functionalization reaction of at least one polymer olefin, carbon monoxide, and an aliphatic or aryl alcohol in the presence of an acid catalyst with either an alcohol:polymer olefin mole ratio >/= 1:1, or an acid catalyst:polymer olefin mole ratio >/= 0.9:1, or both, and recovering at least 80 % functionalized polymer which is predominantly ester.
Abstract:
A Koch functionalized product which is the reaction product of at least one polymer having a number average molecular weight of at least 500 and at least one ethylenic double bond per polymer chain, with carbon monoxide and a nucleophilic trapping agent. The invention includes functionalized polymer, derivatives thereof, and methods of making the same.
Abstract:
一般式 Rf(A-OH) k (ここで、kは1または2であり、kが1の場合Rfは炭素数6以下のパーフルオロアルキル基、該パーフルオロアルキル基のフッ素原子の一部が水素原子で置換されたポリフルオロアルキル基、炭素数6以下の末端パーフルオロアルキル基および炭素数6以下のパーフルオロアルキレン基を含んで構成されるポリフルオロアルキル基または炭素数6以下の末端パーフルオロアルキル基、炭素数6以下のパーフルオロアルキレン基およびエーテル結合を有する、直鎖状または分岐状パーフルオロアルキル基であり、kが2の場合Rfは炭素数6以下のパーフルオロアルキレン基およびエーテル結合を有する、直鎖状または分岐状のパーフルオロアルキレン基またはポリフルオロアルキレン基であり、Aは炭素数1~6のアルキレン基である)で表される含フッ素アルコール、ホウ酸およびポリビニルブチラールの縮合体からなる含フッ素ホウ酸PVBコンポジット。
Abstract:
An oligoamide-modified elastomer includes an elastomer having oligoamide units grafted to the elastomer and forming a plurality of sheet-like structures through hydrogen bonding, the sheet-like structures interacting through non-covalent interactions to form crystalized domains within the elastomer. In a first embodiment, the present invention provides an oligoamide-modified elastomer comprising; an elastomer with a number average molecular weight no less than 80,000 g/mol and a weight-average molecular weight no less than 100,000 g/mol having oligoamide units grafted to said elastomer and forming a plurality of sheet-like structures through hydrogen bonding, the sheet-like structures interacting through non-covalent interactions to form crystalized domains within the elastomer.
Abstract:
The invention concerns a radiopaque, non-biodegradabie, water-insoluble iodinated benzyl ether of polyvinyl alcohol) consisting of a PVA having covalentiy grafted thereon iodinated benzyl groups comprising 1 - 4 iodine atoms per benzyl group, a process for preparing the same comprising reacting a 0 - 100 % hydrolyzed PVA with a iodinated benzyl derivative comprising 1 - 4 iodine atoms per benzyl group in a polar aprotic solvent in the presence of a base in anhydrous conditions. Said iodo-benzylether-PVA is particularly useful as embolic agent in an injectable embolizing composition. The invention also concerns an injectable embolizing composition comprising said iodo-benzylether-PVA and capable of forming a cohesive mass upon contact with a body fluid by precipitation of the iodo- benzylether-PVA. Said injectable embolizing composition is particularly useful for forming in-situ a cohesive mass in a blood vessel or into a tumor. The invention further concerns a coating composition containing said iodo-benzylether-PVA and capable of forming a radiopaque coating on a medical device. The invention further concerns particles formed of said iodo-benzylether-PVA.
Abstract:
Vinylamine-containing polymers are disclosed where the amine groups are substituted with (1) cationic functional groups, (2) anionic functional groups, (3) hydrophobic functional groups, (4) hydrophilic functional groups, (5) functional groups that impart amphoteric characteristics to the polymers, or (6) combinations thereof. Also disclosed are processes for preparing such polymers, as well as compositions comprising such polymers. Among other applications, these polymers can be used in papermaking applications as dry strength additives, wet strength additives, retention aids, drainage aids, and pitch and stickies control agents.
Abstract:
The present invention provides a process for crosslinking of polyallylamine hydrochloride wherein an aqueous solution of polyallylamine hydrochloride is partly neutralized with alkali and epichlorohydrin is added. The aqueous solution is dispersed in an organic medium containing a surfactant. This leads to gelation in individual droplets. The crosslinking in individual gel beads is completed by raising the temperature. The resulting beads are then separated, washed with water, treated with an organic solvent and dried. The method maximizes the yield of crosslinked polyallylamine hydrochloride particles in the range 60 - 100 mesh.