摘要:
A process for preparing a composition by free-radical polymerization of a monomer composition comprising: a) at least one ethylenically unsaturated carboxylic acid containing monomer or anhydride thereof; b) optionally at least one ethylenically unsaturated monomer different from a) but copolymerizable therewith; and c) at least one crosslinking monomer containing at least two ethylenically unsaturated groups. The monomer composition is polymerized in an organic medium having a solubilizing effect on one or more of the monomeric ingredients, but substantially none on the resulting polymer. The polymerization is conducted in the presence of a free radical forming catalyst and at least one steric stabilizing polymer polymerized from a vinyl lactam and a copolymerizable monomer selected from a short chain alkyl ester of (meth)acrylic acid, a long chain alkyl ester of (meth)acrylic acid, and combinations thereof.
摘要:
The invention is directed to a copolymer comprising at least three types of monomeric units, said three types of monomeric units comprising: a temperature-sensitive unit, a hydrophilic unit, and a hydrophobic unit comprising at least one pH-sensitive moiety; wherein said hydrophobic monomeric unit is derived from a copolymerizable unsaturated fatty acid.
摘要:
The present disclosure provides for new photoalignment (co)polymer materials which demonstrate improved adhesion to a substrate. The (co)polymeric structure includes at least one photochemically active chromophore and at least one adhesion promoter group. Articles of manufacture, optical elements, ophthalmic elements and liquid crystal cells which include at least one photoalignment layer made from the photoalignment (co)polymer materials and methods for formation are also disclosed.
摘要:
The present invention relates to a process for esterifying or transesterifying side chains in polymers, comprising the following steps a) preparing a copolymer obtainable by polymerization of aa) at least one (meth)acrylate of the general formula (I) as component A, in which R1 is H or CH3, and R2 is H or an alkyl radical which is optionally substituted by functional groups such as acryloyl, ether, amino, epoxy, halogen or sulfonic acid groups, and ab) at least one monomer of the general formula (II) as component B, in which R3 is as defined for R1, R4 is as defined for R2, and n=from 1 to 40, and b) esterifying or transesterifying the carboxyl group having the R4 radical with an alcohol in the presence of an enzyme which catalyzes the esterification or transesterification. The present invention further relates to the polymers as such and to their use.
摘要:
The present disclosure relates to novel copolymers functionalized with an iodine atom, and comprising at least two different monomers chosen from monomers of (meth)acrylic type. The disclosure also relates to a cosmetic or dermatological composition comprising, in a physiologically acceptable medium, at least one copolymer functionalized with an iodine atom and comprising at least two different monomers chosen from (meth)acrylic monomers. The disclosure also relates to a cosmetic process for making up or caring for keratin materials using the composition.
摘要:
A positive resist composition is provided comprising a polymer comprising recurring units having a carboxyl and/or phenolic hydroxyl group substituted with an acid labile group and recurring units of tert-butyl or tert-amyl-substituted hydroxyphenyl methacrylate and having a weight average molecular weight of 1,000-500,000. The resist composition has a satisfactory effect of suppressing acid diffusion and a high resolution, and forms a pattern of good profile and minimal edge roughness after exposure.
摘要:
Polyelectrolyte resulting from polymerization, for 100 mol %, of: a) a molar ratio ≧50% and ≦99% of monomer units originating from at least one cationic monomer; b) a molar ratio >1% and ≦50% of monomer units originating from at least one monomer including a fully or partially salified free weak acid function; c) optionally a molar ratio >0 mol % and ≦5 mol % of monomer units originating from at least one monomer of formula A-C(═O)—O—[(CH2—CH(R)—O]n—R (I), where n is, independently, a number from 1 to 50, A is a monovalent unsaturated aliphatic radical having 2 to 6 carbon atoms, R1 is a hydrogen atom, a methyl radical, or an ethyl radical, and R is a linear or branched, saturated or unsaturated aliphatic hydrocarbon radical having 8 to 30 carbon atoms; and d) optionally a molar ratio >0% and ≦1% of a diethylene or polyethylene cross-linking monomer.
摘要:
Disclosed is an adhesive composition having adhesion properties, high-speed curing properties and moisture resistance. Also disclosed is an adhesion method. Specifically disclosed is a composition which comprises: a first preparation comprising (A) a nitrile-butadiene rubber, (B) a (meth)acrylic composition, (C) a compound having an enal structure, and (F) a radical polymerization initiator; and a second preparation comprising (A) the nitrile-butadiene rubber, (B) the (meth)acrylic composition, (D) a compound having an amine structure, and (E) a compound containing copper. Also disclosed is a composition which comprises: a first preparation comprising (A) a nitrile-butadiene rubber, (B) a (meth)acrylic composition, (D) a compound having an amine structure, and (F) a radical polymerization initiator; and a second preparation comprising (A) the nitrile-butadiene rubber, (B) the (meth)acrylic composition, (C) a compound having an enal structure, and (E) a compound containing copper.
摘要:
Provided is a process for esterifying or transesterifying side chains in polymers, which involves esterifying or transesterifying the carboxyl group having the R4 radical of a copolymer obtained by polymerizing a (meth)acrylate of formula (I), and a monomer of formula (II): wherein R1 and R3 are independently H or CH3, R2 and R4 are independently H or an alkyl radical which is optionally substituted by functional groups such as acryloyl, ether, amino, epoxy, halogen or sulfonic acid groups, and n is from 1 to 40, with an alcohol in the presence of an enzyme which catalyzes the esterifying or transesterifying. Further provided is the esterified or transesterified polymer product and its use.
摘要:
The present invention relates to a (meth)acrylate polymer for preparing a coating composition, where the (meth)acrylate polymer has a weight-average molecular weight in the range from 10 000 to 60 000 g/mol and the (meth)acrylate polymer comprises 0.5 to 40% by weight of units derived from (meth)acrylic monomers which in the alkyl radical have at least one double bond and 8 to 40 carbon atoms, 0.1 to 10% by weight of units derived from monomers containing acid groups, and 50 to 99.4% by weight of units derived from (meth)acrylates having 1 to 12 carbon atoms in the alkyl radical that have no double bonds or heteroatoms in the alkyl radical, and these (meth)acrylates having 1 to 12 carbon atoms in the alkyl radical are selected such that a polymer composed of these (meth)acrylates having 1 to 12 carbon atoms in the alkyl radical has a glass transition temperature of at least 40° C., based in each case on the weight of the (meth)acrylate polymer.The present invention further relates to a coating material comprising the stated polymer, and to a method of producing a coating. The present invention additionally describes a coated article comprising a coating obtainable by the method.