摘要:
This invention relates to carboxylic acid ester compounds or liquid crystal compounds represented by the following formula [A], liquid crystal compositions and liquid crystal elements using these compounds, the method of producing said liquid crystal elements, and other uses. ##STR1## wherein R represents one radical selected from the group consisting of an alkyl group having 6-18 carbon atoms, an alkoxy group having 6-18 carbon atoms, and a halogenated alkyl group having 6-18 carbon atoms, X represents --CF.sub.3 or --CH.sub.2 --CH.sub.3, m is an integral number of 1-10 when X is --CF.sub.3, and an integral number of 2-10 when X is --CH.sub.2 --CH.sub.3, and C* represents an asymmetric carbon atom.
摘要:
In accordance with the present invention, there are provided carboxylate compounds represented by the following formula [A] and liquid crystal material comprising said compounds ##STR1## wherein R is a group selected from the group consisting of alkyl, alkoxy and halogenated alkyl group of 3-20 carbon atoms, X and Y represent each a group selected from the group consisting of --COO--, --OCO--, --CH.sub.2 CH.sub.2 --, --CH.sub.2 O--, --OCH.sub.2 --, --S--S--, ##STR2## or a single bond, A and B represent each a group selected from the group consisting of specific divalent aromatic and alicyclic group such as phenylene, cyclohexylene and tetrahydronaphthalene and R* is an optically active group of 4-20 carbon atoms containing at least one asymmetric carbon atom (hydrogen atoms attached to the carbon atoms of said optically active group may be substituted with halogen atoms), and m and n are each an integer of 0-2, with the proviso that both m and n do not become 0 at the same time.
摘要:
The liquid crystal racemic mixture of the invention is represented by the formula [I]:Z--(X.A).sub.m (Y.B).sub.n COOR.sup.1 [I]wherein R1 is a specific group of alkyl, alkoxy or halogenated alkyl, X and Y are either one of the following group: --COO--, --OCO--, --CH.sub.2 CH.sub.2 --, --CH.sub.2 O--, --OCH.sub.2 --, --COCH.sub.2 --, --CH.sub.2 CO-- and --S--S--, or a single bond, A and B are each a specific bivalent group such as 1,4-phenylene group, Z is a group selected from the group consisting of ##STR1## (wherein R.sub.2 is an alkyl group, an alkoxy group or a halogenated alkyl group), and m and n are an integer of 0 to 2 (m and N not being simultaneously 0). The liquid crystal composition of the invention comprises the racemic mixture as described above. Moreover, the liquid crystal element of the invention comprises a liquid crystal material containing the liquid crystal racemic mixture as described above.
摘要:
In accordance with the present invention, there are provided carboxylate compounds and liquid compositions thereof represented by the following formula (A) ##STR1## wherein R.sup.1 represents one group selected from the group consisting of alkyl group having 6 to 18 carbon atoms, alkoxy group having 6 to 18 carbon atoms and halogenated alkyl group of 6 to 18 carbon atoms, C* represents an asymmetric carbon atom, and R.sup.2 represents a group represented by the following formula (A)--(CH.sub.2).sub.m --CH.sub.3 or (B)--(CH.sub.2).sub.n --COOR.sub.3 wherein m represents an integer of 2 to 6, n represents an integer of 0 to 5, and R.sup.3 represents alkyl group having 1 to 10 carbon atoms.
摘要:
An adhesive for soft tissue comprising at least one member selected from (meth)acrylic esters each containing an acid anhydride group represented by the specific formula (I) and derivatives of the (meth)acrylic esters represented by the specific formula (Ia), a (meth)acylate, a poly(meth)acrylate derived from a (meth)acrylate and a polymerization initiator; and a kit of an adhesive for soft tissue, comprising containers and, placed therein, the above ingredients. The adhesive for soft tissue and kit thereof according to the present invention are advantageous in that when the adhesive is applied to a wound on a soft tissue, at least one member selected from the above (meth)acrylic esters represented by the formula (I) and/or the derivatives thereof represented by the formula (Ia) together with a (meth)acrylate, contained in the adhesive, polymerizes irrespective of the presence of blood or body fluid, so that the adhesive undergoes strong bonding (conjugation) with the soft tissue and that further, the adhesive ensures low cytotoxicity to thereby ensure effective utilization in the treatment of a wound on a soft tissue, especially an integument, of an organism.
摘要:
The adhesive composition for soft tissues, the adhesive composition for wound dressing or the wound dressing agent composition of the present invention is an adhesive composition for soft tissues, an adhesive composition for wound dressing or a wound dressing agent composition, comprising a monomer (A), a polymer (B) and a polymerization initiator composition (C) containing an organoboron compound, and is characterized by having a viscosity of 0.4 to 75,000 cp within 30 seconds after mixing of the components (A), (B) and (C). The composition of the present invention not only has low toxicity, low harmfulness and high adhesive strength but also is excellent in workability during application and is capable of forming films of excellent properties.
摘要:
The composition for hard tissue repair of the present invention is characterized by comprising 5 to 98.95 parts by weight of a monomer (A), 1 to 75 parts by weight of a (meth)acrylate polymer (B) and 0.05 to 20 parts by weight of a polymerization initiator composition (C) containing an organoboron compound (c1), with the proviso that the total amount of the components (A), (B) and (C) is 100 parts by weight. The composition undergoes small-scale heat generation during curing and can ensure a sufficient working time.
摘要:
The adhesive composition for soft tissues, the adhesive composition for wound dressing or the wound dressing agent composition of the present invention is an adhesive composition for soft tissues, an adhesive composition for wound dressing or a wound dressing agent composition, comprising a monomer (A), a polymer (B) and a polymerization initiator composition (C) containing an organoboron compound, and is characterized by having a viscosity of 0.4 to 75,000 cp within 30 seconds after mixing of the components (A), (B) and (C). The composition of the present invention not only has low toxicity, low harmfulness and high adhesive strength but also is excellent in workability during application and is capable of forming films of excellent properties.
摘要:
The composition for hard tissue repair of the present invention is characterized by comprising 5 to 98.95 parts by weight of a monomer (A), 1 to 75 parts by weight of a (meth)acrylate polymer (B) and 0.05 to 20 parts by weight of a polymerization initiator composition (C) containing an organoboron compound (c1), with the proviso that the total amount of the components (A), (B) and (C) is 100 parts by weight. The composition undergoes small-scale heat generation during curing and can ensure a sufficient working time.