Abstract: A liquid-phase process is provided for the synthesis from glutarimidines of diaminopyridines and related compounds, which are used industrially as compounds and as components in the synthesis of a variety of useful materials. The synthesis proceeds by means of a dehydrogenative aromatization process.

Abstract: The present invention relates to a poly(p-xylylene)-based polymer having a low dielectric constant suitable for low loss dielectrics (LLD), and an insulating material, a printed circuit board and a functional element using the same. More particularly, the poly(p-xylylene)-based polymer includes at least one repeat unit expressed by the following formula (1): wherein, at least one of R1, R2, R7 and R8 is independently substituted or unsubstituted C6-C20 aryl; the rest of R1 to R8 are each and independently H, substituted or unsubstituted linear C1-C3 alkyl, or substituted or unsubstituted branched C1-C3 alkyl; and n is an integer of 400 to 900.

Abstract: The present invention is directed to a polycarbonate resin comprising a structural unit represented by the following general formula (I), wherein the structural unit of general formula (I) occupies 5 to 100 mol % relative to all the structural units, and the limiting viscosity of the polycarbonate resin is 0.3 to 2.0 dl/g: wherein in the formula, R1 through R8 independently represent a hydrogen atom, a halogen group, an alkyl group having a carbon number of 1 through 9, an aryl group having a carbon number of 6 through 12, an alkenyl group having a carbon number of 2 through 5, an alkoxy group having a carbon number of 1 through 5, or an aralkyl group having a carbon number of 7 through 17.

Abstract: There is provided a polyketone comprising repeating units, 95-100 mole % of which are 1-oxotrimethylene and having an intrinsic viscosity of 2.5-20 dl/g, wherein the content of Pd element is 0-20 ppm, terminal structures include an alkyl ester group (terminal group A) and an alkyl ketone group (terminal group B), and the equivalent ratio of terminal group A/terminal group B is 0.1-8.0. The polyketone of the present invention can be used in any forms, such as fibers and films, and can be applied to a wide variety of the uses such as clothing, reinforcing materials for rubbers, resins, cements, and optical fibers, electronic materials, battery materials, civil engineering materials, medical materials, daily commodities, fishery materials, and packaging materials.

Abstract: A polymer compound comprising as repeating units an optionally substituted fluorenediyl group and a phenylene group having one or more substituents, and comprising a repeating unit of the following formula (1) and/or a group of the following formula (2): (in the formula (1), Ar1 and Ar2 represent an arylene group or di-valent aromatic heterocyclic group, and Ar1 and may be the same or different.) (in the formula (2), Ar1 represents the same meaning as described above. Ar3 represents an aryl group or mono-valent aromatic heterocyclic group.).

Abstract: The subject matter of the invention is a radically polymerizable dental material comprising at least two components. A first component of the dental material contains the salt of a CH-acidic compound, and an additional component contains an acid with acidity greater than that of the CH-acidic compound of the first component. Both components contain radically polymerizable monomers. When the two components are mixed, the acid of the second component converts the salt of the CH-acidic compound of the first component into a CH-acidic molecule, and the CH-acidic molecule triggers the radical polymerization of the monomers. In addition to the advantages of CH-acidic compounds in dental materials on the basis of a reactive resin, the invention achieves long-term storage stability as a result of an increase in the proportion of the reactive resin matrix in polymerizable dental materials.

Abstract: Antireflective coatings and related polymers are disclosed.

Abstract: Optically active polymers that are composed of monomer residues derived from chiral pre-polymerized monomers, which maintain the chirality of the pre-polymerized monomers upon polymerization are disclosed. These polymers can be composed of monomer residues that are derived from readily available chiral monomers and can be designed to have pre-determined characteristics such as chirality, biodegradability and functionality. Uses of these polymers as therapeutically active agents, and/or as carriers of therapeutically active agents, for delivering the active agents to a targeted bodily site and/or for a sustained release of the active agent, are further disclosed. Also disclosed are processed of preparing the polymers, compositions and medical devices containing the polymers, and conjugates of these polymers and various agents.

Abstract: A three-dimensional object is manufactured by selective sintering by means of electromagnetic radiation, wherein the powder comprises a polymer or copolymer having at least one of the following structural characteristics: (i) at least one branching group in the backbone chain of the polymer or copolymer, provided that in case of the use of polyaryletherketones (PAEK) the branching group is an aromatic structural unit in the backbone chain of the polymer or copolymer; (ii) modification of at least one end group of the backbone chain of the polymer or copolymer; (iii) at least one bulky group within the backbone chain of the polymer of copolymer, provided that in case of the use of polyaryletherketones (PAEK) the bulky group is not selected from the group consisting of phenylene, biphenylene, naphthalene and CH2— or isopropylidene-linked aromatics; (iv) at least one aromatic group non-linearly linking the backbone chain.

Abstract: A copolymer composition comprising monomers copolymerized in the following percentages by weight: (a) from about 20% to about 95% of a monomer, or mixture of monomers, of formula (I): CnF2n+1(CH2)x[(CF2CF2)y(CH2CH2)z]m-L-C(O)—C(R)?CH2??(I) wherein R is H, Cl, F or CH3, L is O, S, NH, S—(CH2)rO, S—(CH2)rNH, OC(O)NH—CH2CH2O, NHC(O)NHCH2CH2O, S—(CH2)rOC(O)NHCH2CH2O, or S(CH2)rNHC(O)NHCH2CH2O, and (b) from about 5% to about 80% of at least one of: (i) an alkyl (meth)acrylate monomer having a linear, branched or cyclic alkyl group of from about 6 to about 18 carbons; or (II) a monomer of formula (II) (R2)2N—R3—O—C(O)—C(R)?CH2??(II) wherein R is H, Cl, F or CH3, each R2 is independently a C1 to C4 alkyl; and R3 is a divalent linear or branched C1 to C4 alkylene; and wherein the nitrogen is from about 40% to 100% salinized; or (iii) a mixture thereof.

Abstract: A milling process for the preparation of fine-particled polyarylene ether ketone comprises milling a porous polyarylene ether ketone having a BET surface area of more than 1 m2/g.

Abstract: An organic compound has the general structural formula I. In the formula I, Core is a conjugated organic unit capable of forming a rod-like macromolecule, n is a number of the conjugated organic units in the rod-like macromolecule, Gk is a set of ionogenic side-groups, and k is a number of the side-groups in the set Gk. The set of the ionogenic side-groups provide solubility of the organic compound or its salts and give rigidity to the rod-like macromolecule. The number n provides molecule anisotropy that promotes self-assembling of macromolecules in a solution of the organic compound or its salts, forming lyotropic liquid crystal. The solution is capable of forming a solid optical retardation layer of positive A-type substantially transparent to electromagnetic radiation in the visible spectral range. An optical film based on an organic compound of the general formula I and a method of making same are also disclosed.

Abstract: Provided herein are the polymers shown below. The value n is a positive integer. R1 is an organic group, and each R2 is H or a chemisorbed group, with at least one R2 being a chemisorbed group. The polymer may be a nanostructured film. Also provided herein is a method of: converting a di-p-xylylene paracyclophane dimer to a reactive vapor of monomers; depositing the reactive vapor onto a substrate held at an angle relative to the vapor flux to form nanostructured poly(p-xylylene) film; reacting the film with an agent to form hydrogen atoms that are reactive with a precursor of a chemisorbed group, if the film does not contain the hydrogen atoms; and reacting the hydrogen atoms with the precursor. Also provided herein is a device having a nanostructured poly(p-xylylene) film on a pivotable substrate. The film has directional hydrophobic or oleophobic properties and directional adhesive properties.

Abstract: Sulfonated block copolymers that may be used as membranes for fuel cells include sulfonated polyaryletherketone blocks and lightly sulfonated polyethersulfone blocks. The sulfonated polyaryletherketone blocks include structural units of formula and the lightly sulfonated polyethersulfone blocks include structural units of formula wherein R1, R2, R3, R4, R5 and R6 are independently C1-C10 alkyl, C3-C12 cycloalkyl, C6-C14 aryl, allyl, alkenyl, alkoxy, halo, or cyano; Z, Z1 and Z2 are independently a direct bond or O, S, (CH2)r, (CF2)r, C(CH3)2, C(CF3)2, or a combination thereof; M is H, a metal cation, a non-metallic inorganic cation, an organic cation or a mixture thereof; a and e are independently 0 or an integer from 1 to 3; b, c, d, and f are independently 0 or an integer from 1 to 4; m, n and p are independently 0 or 1; and r is an integer from 1 to 5.

Abstract: Sulfonated block copolymer suitable for use as proton exchange membranes for fuel cells comprise sulfonated polyaryletherketone blocks and polyethersulfone blocks. The sulfonated polyaryletherketone blocks comprise structural units of formula the polyethersulfone blocks comprising structural units of formula wherein R1, R2, R3 and R4 are independently C1-C10 alkyl, C3-C12 cycloalkyl, C6-C14 aryl, allyl, alkenyl, alkoxy,halo, or cyano; Z and Z1 are independently a direct bond or O, S, (CH2)r; (CF2)r, C(CH3)2, C(CF3)2, or a combination thereof; M is H, a metal cation, a non-metallic inorganic cation, an organic cation or a mixture thereof a is 0 or an integer from 1 to 3; b, c and d are independently 0 or an integer from 1 to 4; m and n are independently 0 or 1; and r is an integer from 1 to 5.

Abstract: A liquid crystal polymer represented by the following formula (I): wherein D represents a n-valence connecting group; n represents an integer of 3 to 20; L1 represents a single bond or a bivalent connecting group; P represents a polymer having at least one ester bond and/or amide bond and having a weight-average molecular weight of 1,000 or more; m represents an integer that satisfies the relation of n?m; R represents a hydrogen atom or a substituent; when a plurality of L1, a plurality of P, or a plurality of R are present in a molecule, they may be the same or different from each other; and P and P, or P and R may bond together.

Abstract: The instant invention pertains to the preparation of polymers or copolymers wherein in a first step a controlled free radical polymerization process is carried out and in a second step the resulting polymer is modified by transesterification reactions. The final modified polymer or copolymer is useful as a dispersant for pigments. Further aspects of the invention are the thus prepared polymers or copolymers, a pigment concentrate containing the polymer or copolymer and a coating material containing the pigment concentrate.

Abstract: The present invention relates to a method for producing a polymer electrolyte molded article, which comprises forming a polymer electrolyte precursor having a protective group and an ionic group, and deprotecting at least a portion of protective groups contained in the resulting molded article to obtain a polymer electrolyte molded article. According to the present invention, it is possible to obtain a polymer electrolyte material and a polymer electrolyte molded article, which are excellent in proton conductivity and are also excellent in fuel barrier properties, mechanical strength, physical durability, resistance to hot water, resistance to hot methanol, processability and chemical stability. A polymer electrolyte fuel cell using a polymer electrolyte membrane, polymer electrolyte parts or a membrane electrode assembly can achieve high output, high energy density and long-term durability.

Abstract: The present invention discloses a method of synthesizing an aliphatic polymer having a ketone group in the main chain thereof, in which polyhydric alcohol (for example, glycerin) as a raw material is polymerized in the presence of a catalyst, and a method of preparing a composition containing an aliphatic polymer having a ketone group in the main chain thereof, including such a process.

Abstract: Photoactivatable prepolymers and methods of use thereof are disclosed for microencapsulation of a substantially water-insoluble material within a nonporous shell. As provided herein, the microencapsulated material is released with no more than a slow release rate. Upon exposure of the nonporous shell to light, the nonporous shell is converted into a porous shell having an increased release rate for the microencapsulated material.

Abstract: An exemplary stiffener includes at least one polyethylene naphthalate layer.

Abstract: The present invention relates to compounds according to formula (1) and/or according to formulae (4) to (10) and their use in organic electroluminescent devices, in particular as a matrix material in phosphorescent devices.

Abstract: A polymeric material includes phenyl moieties, ketone moieties and ether moieties in the polymeric backbone of said polymeric material, wherein the difference between the nucleation temperature (Tn) and the glass transition temperature (Tg) of said polymeric material is greater than 23° C.

Abstract: The invention provides an aliphatic polymer having a ketone group and ether bonding in its main chain, characterized by comprising structural units represented by the Formula (1) and by the Formula (2). In the Formulae (1) and (2), Ra and Rb each independently represents a substituted or unsubstituted divalent aliphatic hydrocarbon group. Rc represents a substituted or unsubstituted divalent aliphatic hydrocarbon group having ether bonding in a terminal thereof, or a single bond. N1 represents an integer of 1 or more. N2 represents an integer of 0 or more. And, n1+n2 is in a range of 2 to 1000. The polymer preferably contains ether bonds and ketone groups in a ratio of 0.01 to 100. The polymer can be substantially comprised of a structural unit represented by the Formula (1) as a repeating unit. A resin composition containing as a component structural units represented by the Formula (1) is also provided. The resin composition may further comprise an electrically conductive powder.

Abstract: A pressure-sensitive adhesive for an optical film of the present invention comprises a (meth)acrylic polymer comprising 50 to 99.99% by weight of alkyl (meth)acrylate monomer unit and 0.01 to 30% by weight of a photocrosslinkable monomer unit having an unsaturated double bond-containing polymerizable functional group and a photocrosslinkable moiety different from the functional group. A pressure-sensitive adhesive layer is formed from the pressure-sensitive adhesive on at least one side of an optical film, wherein the photocrosslinkable moiety of the (meth)acrylic polymer in the pressure-sensitive adhesive is crosslinked by active energy ray irradiation. The pressure-sensitive adhesive can form the pressure-sensitive adhesive layer with a high level of durability and preferable workability.

Abstract: Medical device (?) comprising at least one part (?) consisting of a polymer material (M) comprising at least one kinked rigid-rod polyarylene (P) of which more than 50 wt. % of the recurring units are recurring units (R) of one or more formulae consisting of an optionally substituted arylene group which is linked by each of its two ends to two other optionally substituted arylene groups via a direct C—C linkage. The recurring units (R) are a mix (?) consisting of (i) between 0 and 75 mole %, of rigid rod-forming arylene units (Ra) and (ii) between 25 and 100 mole % of kink-forming arylene units (Rb), both contents being based on the total number of moles of the recurring units (R). Arylene units (Ra) and/or (Rb) may be optionally substituted by at least one monovalent substituting group.

Abstract: The invention provides ion-conductive copolymers that can be used to fabricate proton exchange membranes (PEM's), catalyst coated proton exchange membranes (CCM's) and membrane electrode assemblies (MEA's) which are useful in fuel cells and their application in electronic devices, power sources and vehicles. The ion-conductive copolymers comprise one or more ion-conductive oligomers randomly positioned in a polymeric backbone that is not ion-conductive.

Abstract: The present invention discloses polymeric materials that incorporate a modified quinone moiety, either to cross-link the polymer or as a monomeric unit of the polymer These polymeric materials can be efficiently degraded through electrochemical reduction of the quinone leading to rapid hydrolysis of the pendant chemical groups and degradation of the polymer. Quinone-containing compositions and methods of producing electrochemically degradable polymers are disclosed. The methods and compositions of the present invention can be used in a wide variety of applications, including, but not limited to, drug delivery, tissue regeneration, biomedical implants, and electronic systems.

Abstract: The present invention provides biodegradable particles (e.g., three-dimensional particles) and micelles which can be used to encapsulate active agents for delivering to a subject. The present invention further provides methods for producing and delivering such particles and micelles. Additionally, the invention provides vaccination strategies that encompass the use of the novel particles and micelles.

Abstract: The present invention provides crosslinkable compositions useful in the preparation of hydrophilic gels, and are prepared from polymers having pendent hydrophilic groups, and pendant Michael donor groups, and crosslinked by polyacryl Michael acceptor compounds.

Abstract: Polyketone fibers comprising, on the basis of the entire repeating units, 95% by mole of a repeating unit of the formula (1) shown below, and showing a minimum value (Amin(F)) of a UV absorbance of 0.5 or less in a wavelength region of 210 to 240 nm.

Abstract: Multifunctional reactive polymers created by chemical vapor deposition (CVD) and methods of making such polymeric systems are provided. Such polymers provide multifunctional surfaces which can present two or more different molecules (e.g. biological ligands) in controlled ratios. Polymers may include compositional gradients allowing attached ligands to be presented as continuous gradients across a surface. The polymer compositions are modularly designable and applicable to a wider range of applications, including biomedical devices and diagnostic systems.

Abstract: There is provided a polyketone comprising repeating units, 95-100 mole % of which are 1-oxotrimethylene and having an intrinsic viscosity of 2.5-20 dl/g, wherein the content of Pd element is 0-20 ppm, terminal structures include an alkyl ester group (terminal group A) and an alkyl ketone group (terminal group B), and the equivalent ratio of terminal group A/terminal group B is 0.1-8.0. The polyketone of the present invention can be used in any forms, such as fibers and films, and can be applied to a wide variety of the uses such as clothing, reinforcing materials for rubbers, resins, cements, and optical fibers, electronic materials, battery materials, civil engineering materials, medical materials, daily commodities, fishery materials, and packaging materials.

Abstract: A compound (monomer) comprising i) one or more dienophile groups (A-functional groups), ii) one or more ring structures comprising two conjugated carbon-to-carbon double bonds and a leaving group L (B-functional groups), and iii) one or more chemically bound poragens, characterized in that the A-functional group of one monomer is capable of reaction under cycloaddition reaction conditions with the B-functional group of a second monomer to thereby form a cross-linked, polyphenylene polymer.

Abstract: The invention relates to a method for producing polyfluoroanthenes containing repeat units of general formula (I), said method consisting of the following steps: a) a monomer fluoroanthene derivative of formula IIa is produced; b) optionally the monomer fluoroanthene derivative of formula IIa is converted into another monomer fluoroanthene derivative of formula IIb; and c) the monomer fluoroanthene derivative of formula IIa or IIb is polymerised, optionally together with at least one other comonomer. The invention also relates to polyfluoroanthenes that can be produced according to the inventive method, films, a light-emitting layer containing or consisting of at least one inventive polyfluoroanthene, OLEDs containing at least one inventive polyfluoroanthene, OLEDs containing an inventive light-emitting layer, a device containing an inventive OLED, and the use of the inventive polyfluoroanthene emitter substances in OLEDs.

Abstract: The invention relates to a method for preparing halogen-free flameproof epoxy resins, in which a halogen-free epoxy resin is reacted with a polyfunctional aldehyde or ketone and a phosphinic acid derivative, wherein the phosphinic acid derivative contains at least one P—H-active structural unit of the formula ?PH(O) and is used in an amount equivalent to the polyfunctionality of the aldehyde or ketone, to a halogen-free flameproof epoxy resin obtainable by this method, to the use of the epoxy resin as a base material for the manufacture of printed circuit boards and printed circuits and to intermediates used to prepare the epoxy resins.

Abstract: Chemically protected dihydroxyacetone and/or dimers are used to make polycarbonates, poly(acetal carbonate)s, poly(spiroacetal)s, polyesters and polyurethanes.

Abstract: A composition of matter for a recording medium in atomic force data storage devices. The composition includes one or more poly(aryl ether ketone) copolymers, each of the one or more poly(aryl ether ketone) copolymers including (a) a first monomer including an aryl ether ketone and (b) a second monomer including an aryl ether ketone and a hydrogen bonding cross-linking moiety, the moiety capable of forming two or more hydrogen bonds at room temperature, each of the one or more poly(aryl ether ketone) copolymers having two terminal ends, each terminal end having a phenylethynyl moiety. The covalent and hydrogen bonding cross-linking of the poly(aryl ether ketone) oligomers may be tuned to match thermal and force parameters required in read-write-erase cycles.

Abstract: The invention detailed herein comprises a family of radiation-curable coating formulations specifically for metal substrates. These coating formulations are based on multifunctional acrylate resins formed by the reaction of acrylate monomers and oligomers with ÿ-keto esters (e.g., acetoacetates), ÿ-diketones (e.g., 2, 4-pentanedione), ÿ-keto amides (e.g., acetoacetanilide, acetoacetamide), and/or other ÿ-dicarbonyl compounds that can participate in the Michael addition reaction. An essential novelty of these coating resins is that they will cure under standard UV-cure conditions without the addition of traditional photoinitiators. Other materials, both reactive (conventional acrylates) and non-reactive (e.g., solvents) may also be incorporated into the resin oligomers to enhance the coatings properties on metal substrates.

Abstract: A composition of matter for the recording medium of nanometer scale thermo-mechanical information storage devices and a nanometer scale thermo-mechanical information storage device. The composition includes: one or more polyaryletherketone polymers, each of the one or more polyaryletherketone polymers having two terminal ends, each terminal end having two or more phenylethynyl moieties. The one or more polyaryletherketone polymers are thermally cured and the resulting cross-linked polyaryletherketone resin used as the recording layers in atomic force data storage devices.

Abstract: A fibrous reinforcement for an air suspension includes polyketone fibers. The fibrous reinforcement can improve the pressure resistance, the bending resistance, the peeling resistance between rubber/fiber, the fatigue resistance, and the durability of a rubber film of the air suspension. This reinforcement is formed from polyketone cords or composite fiber cords including polyketone fibers and other fibers. Since the polyketone fibers have excellent adhesion to the rubber and small elongation, the pressure resistance, the bending resistance, the peeling resistance between rubber/fiber, the fatigue resistance, and the durability of the rubber film of the air suspension can be improved by using the polyketone fibers as the fibrous reinforcement.

Abstract: The present application relates to a polymer having the formula where R30, R31, R32, R33, R40, R41, R42, jj, kk, mm, and nn are described herein. The compounds are useful in forming photoresist compositions.

Abstract: An aliphatic ketone polymer comprising a unit represented by the following formula (1), the unit represented by the following formula (2), and a unit represented by the following formula (3) or (4). (In the formulae, R1 to R10 may be the same or different and each represents hydrogen, an optionally halogenated C1-20 hydrocarbon group, halogeno, hydroxy, ester, alkoxy, cyano, imide, silyl, or a group selected from the group consisting of C1-20 hydrocarbon groups substituted by a functional group selected among hydroxy, ester, alkoxy, cyano, imide, and silyl, provided that R2 and R8 may be bonded to R3 and R9, respectively, to form a monocycle or polycycle; and n1, n2, and N3 satisfy 1?n1?20, 1?n2?35,000, and 1?n3?40,000.

Abstract: An approach is presented for designing a polymeric layer for nanometer scale thermo-mechanical storage devices. Cross-linked polyaryletherketone polymers are used as the recording layers in atomic force data storage devices, giving significantly improved performance when compared to previously reported cross-linked and linear polymers. The cross-linking of the polyaryletherketone polymers may be tuned to match thermal and force parameters required in read-write-erase cycles.

Abstract: Disclosed is a process for preparing branched polyarylene ether polymers by (A) providing a reaction mixture comprising (i) a polyfunctional phenol compound of the formula Ar(OH)x wherein x?3 and wherein Ar is an aryl moiety or an alkylaryl moiety, provided that when Ar is an alkylaryl moiety at least three of the —OH groups are bonded to an aryl portion thereof, (ii) a compound of the formula wherein m is 0 or 1, Y and Y? each, independently of the other, is fluorine or chlorine, and A is as defined herein, (iii) a compound of the formula wherein B is as defined herein, and (iv) a carbonate base; and (B) heating the reaction mixture and removing generated water from the reaction mixture, thereby effecting a polymerization reaction. Also disclosed are polymers prepared by this process and imaging members containing these polymers.

Abstract: A proton conducting polymer includes a polymer backbone and a heterocyclic compound attached to the polymer backbone. The heterocyclic compound includes a sulfonyl functionality bonded to heterocyclic compound.

Abstract: Metal complexing agents are used to purify polymers including conducting polymers to provide very low metal content. The process comprises precipitating the polymer in solution into a solvent system comprising the metal complexing agent. Very low levels including undetectable levels of metals such as nickel and magnesium can be achieved. High purity polymers are used in electronics and photovoltaic applications.

Abstract: The invention is a method of bonding a first fluid conduit (14) to one or more other fluid conduits (12) or elements such as an electrode (92) or heating element. The method comprises positioning a first fluid conduit (14) substantially in contact with the other fluid conduits or elements (12) wherein a bond region (16) is created. The bond region is wetted with a liquefied thermoplastic polymer (34) which is then subsequently cooled forming a substantially fluid tight bond between the first fluid conduit (14) and the other fluid conduits or elements (14).

Abstract: The invention provides a crosslinkable aromatic resin having a protonic acid group and a crosslinkable group, suitable for electrolytic membranes and binders used in fuel cells, etc., and electrolytic polymer membranes, binders and fuel cells using the resin. The crosslinkable aromatic resin has a crosslinkable group, which is not derived from the protonic acid group and can form a polymer network without any elimination component. This resin exhibits excellent ion conductivity, heat resistance, water resistance, adhesion property and low methanol permeability. Preferably, the crosslinkable group is composed of a C1 to C10 alkyl group directly bonded to the aromatic ring and/or an alkylene group having 1 to 3 carbon atoms in the main chain in which at least one carbon atom directly bonded to the aromatic ring bonds to hydrogen, and a carbonyl group, or a carbon-carbon double bond or triple bond.

Abstract: The present invention provides crosslinkable compositions useful in the preparation of hydrophilic gels, and are prepared from polymers having pendent hydrophilic groups, and pendant Michael donor groups, and crosslinked by polyacryl Michael acceptor compounds.