- Preparation method of dihydric alcohol unsaturated carboxylate
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The invention discloses a preparation method of dihydric alcohol unsaturated carboxylate. The method comprises the following steps: 1, adding thionyl chloride to dihydric alcohol in a dropwise manner, carrying out a reaction after dropwise addition is completed, and washing a material obtained after the reaction with water to obtain dihydric alcohol chloride; and 2, adding unsaturated carboxylic acid to the dihydric alcohol chloride obtained in step 1, adding an alkaline substance, adding a polymerization inhibitor, uniformly stirring above materials, heating the obtained mixture to 80-120DEG C, reacting the heated mixture for 1-24h, and centrifuging the obtained reaction product to remove generated chloride and unsaturated carboxylate in order to obtain dihydric alcohol unsaturated carboxylate. The method has the advantages of simple technology, environmental protection, no generation of wastewater, no use of flammable, combustible or carcinogenic organic solvents, no generation of waste gases, and realization of reduction of corrosion to a reaction device and prolongation of the service life of the device due to no use of strong acidic substances in the reactions.
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Paragraph 0023
(2018/02/04)
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- Dental fillers including a phosphorus-containing surface treatment, and compositions and methods thereof
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The present application provides dental fillers, and methods of making and using dental fillers that include a treated surface that includes phosphorus and a divalent cation. Dental compositions including such dental fillers can be useful for delivering ions to the oral environment.
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Page/Page column 18
(2016/05/09)
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- Polymerizable mesogen compound having improved photoreactive efficiency and polymerizable liquid crystal compositions containing the same
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The present invention relates to a polymerizable mesogen compound having improved photo-reaction efficiency by introducing an alpha-thiomethyl acrylate group as a photo-reactive group, and to a polymerizable liquid crystal composition containing the same. The polymerizable mesogen compound of the present invention has improved photo-reaction efficiency at a relatively low energy state by introducing an alpha-thiomethyl acrylate group as a photo-reactive group, retains excellent solubility in a host liquid crystal due to an asymmetric structure thereof, and improves stability of the pretilt angle after photo-crosslinking, and thus can be useful as a polymerizable liquid crystal composition, particularly, a polymerizable liquid crystal composition for a polymer stabilization alignment type liquid crystal display.
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Paragraph 0129-0131
(2016/12/26)
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- Hydroxy functional acrylate and methacrylate monomers prepared via lipase-catalyzed transacylation reactions
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Candida antarctica lipase B (CAL-B, Novozyme 435) catalyzes the transacylation of methyl acrylate and methyl methacrylate with diols and triols in 2-methyl-2-butanol at 50 °C. Under the experimental conditions, up to 70 mol% of the acyl donor methyl acrylate was converted. Methyl methacrylate is the less efficient acyl donor (up to 60 mol%) due to the higher sterical hindrance in the enzymatic transacylation. Under the reaction conditions high yields of the mono-acylated products are obtained, which contain minor amounts of bis(meth)acrylates. In addition it was observed that Novozyme 435 catalyzes regioselectively the acylation of the primary hydroxyl groups. In comparison with the chemical catalyzed route no selectivity was observed for unsubstituted diols. For substituted diols more mono-acylated product was formed in the lipase-catalyzed reaction than in the chemical catalyzed reaction.
- Popescu, Dragos,Hoogenboom, Richard,Keul, Helmut,Moeller, Martin
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experimental part
p. 80 - 89
(2010/08/20)
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- DENTAL COMPOSITIONS WITH SURFACE-TREATED FILLER FOR SHELF STABILITY
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The invention features dental compositions containing a basic filler that has been surface-treated with a strong acid to increase the shelf life of the composition.
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Page/Page column 28
(2008/06/13)
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- DENTAL COMPOSITIONS WITH A WATER SCAVENGER
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The present invention relates to polymerizable dental compositions that contain a water scavenger, such as a molecular sieve, to increase the shelf life of the composition.
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Page/Page column 27-28
(2008/06/13)
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- DENTAL COMPOSITIONS WITH CALCIUM PHOSPHORUS RELEASING GLASS
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The present application provides dental compositions, and methods of making and using dental compositions that include a calcium and phosphorus releasing glass. Such dental compositions can be useful for delivering ions to the oral environment.
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Page/Page column 30-31
(2008/06/13)
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- DENTAL FILLERS AND COMPOSITIONS INCLUDING PHOSPHATE SALTS
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The present application provides dental fillers, and methods of making and using dental fillers that include a treated surface that includes a phosphate salt. Dental compositions including such dental fillers can be useful for delivering ions to the oral environment. Dental compositions, and methods of using dental compositions that include a phosphate salt and a hardenable resin or a water-dispersible, polymeric film former are also provided.
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Page/Page column 28-29
(2008/06/13)
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- SELF-ADHESIVE COMPOSITIONS INCLUDING A PLURALITY OF ACIDIC COMPOUNDS
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The present invention provides self-adhesive compositions that include a plurality of acidic compounds. The self-adhesive compositions are useful for applications including, for example, restoring dental structures and adhering orthodontic appliances to teeth.
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Page/Page column 27
(2008/06/13)
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- DENTAL METHODS, COMPOSITIONS, AND KITS INCLUDING ACID-SENSITIVE DYES
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Methods and compositions including an aqueous liquid that includes an acid-sensitive dye are disclosed for use in dental and orthodontic procedures. The aqueous liquid can be useful for providing a visible color change to indicate contact with acidic materials including, for example, etching compositions, self-etching adhesives, and self-adhesive compositions.
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Page/Page column 17-18
(2008/06/13)
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- DENTAL FILLERS, METHODS, COMPOSITIONS INCLUDING A CASEINATE
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The present application provides dental fillers, and methods of making and using dental fillers that include a treated surface that includes a caseinate. Dental compositions including such dental fillers can be useful for delivering ions to the oral environment. Dental compositions, and methods of using dental compositions that include a caseinate and a hardenable resin or a water-dispersible, polymeric film former are also provided.
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Page/Page column 31
(2008/06/13)
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- COMPOSITION FOR POLYELECTROLYTES, POLYELECTROLYTES, ELECTRICAL DOUBLE LAYER CAPACITORS AND NONAQUEOUS ELECTROLYTE SECONDARY CELLS
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A polymer electrolyte-forming composition containing (A) a quaternary ammonium salt of general formula (1) below and (B) an ionic liquid can be converted into a polymer without compromising the excellent properties of the ionic liquid, thus enabling an electrolyte having an excellent safety and electrical conductivity and also a broad potential window to be obtained. In formula (1), R1 to R3 are each independently an alkyl group of 1 to 5 carbons or a substituent having a reactive unsaturated bond and any two from among R1 to R3 may together form a ring, and R4 is methyl, ethyl or a substituent having a reactive unsaturated bond, with the proviso that at least one of R1 to R4 is a substituent having a reactive unsaturated bond. X is a monovalent anion, the letter m is an integer from 1 to 8, and the letter n is an integer from 1 to 4.
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- SELF-ETCHING DENTAL COMPOSITIONS AND METHODS
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The present invention is directed to dental compositions that can be used as adhesives for bonding a dental material to a dental structure surface and/or as a dental restorative material. The dental composition is preferably applied to a dental structure surface under conditions effective to etch the dental structure surface.
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Page/Page column 40-41
(2008/06/13)
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