394 results about "Hydrazide" patented technology

The invention relates to the technical field of high polymer materials, and particularly provides a self-repairing type UV curing alumite color layer coating and a preparation method thereof. The water-based ink is prepared from, by weight, 30-50 parts of polyurethane acrylic resin, 10-25 parts of modified acrylic oligomer containing dynamic covalent bonds, 2-5 parts of photoinitiator, 3-8 parts of hydrophobic modified nano filler and 1-3 parts of cross-linking agent, and the dynamic covalent bonds are selected from at least one of hydrazide bonds, boric acid ester bonds and Diels-Alder bonds. By introducing a gradient energy collaborative network of dynamic covalent bonds and quadruple hydrogen bonds, rapid self-repairing of the coating at normal temperature and thermal triggering recombination of deep damage are achieved, and meanwhile through the micro-phase separation design of the hydrophobic core-shell filler and the graft modified silicon carbide nanowires, the hydrolysis resistance is improved.

The invention discloses an organic plugging agent, a preparation method thereof and application of the organic plugging agent to inhibition of SAGD steam cavity edge water invasion. The organic plugging agent is prepared from the following raw materials: epoxy resin, a curing agent, nano aerogel, mineral fibers, plant fibers, a reactive diluent, a heat stabilizer and water, the epoxy resin is at least one of glycidyl amine epoxy resin and alicyclic epoxy resin; the curing agent is at least one of amino resin, dicyandiamide and hydrazide; the heat stabilizer is at least one of thiourea, sodium thiosulfate and cobalt chloride. The organic plugging agent is excellent in high temperature resistance, mineralization resistance and plugging performance, the organic plugging agent, nitrogen and an inorganic plugging agent are injected into a water plugging system of an SAGD steam cavity edge well in a slug mode, the organic plugging agent is applied to SAGD high-temperature and high-leakage well conditions, and the SAGD production effect can be effectively improved.

The invention belongs to the technical field of membrane separation, and aims to provide a preparation method and application of a covalent organic framework bipolar membrane. The method comprises the following steps: combining at least one amine, hydrazide or aldehyde monomer containing ionic groups with a monomer without ionic groups, and respectively synthesizing covalent organic framework COF nanosheets with positive charges and negative charges through a one-pot method under the condition of coexistence of an acid catalyst and an organic solvent; sequentially depositing COF nanosheets with positive and negative charges on the surface of the porous carrier by a hot solvent evaporation method; by constructing two COF separation layers with regular pore channels and opposite electrical properties, the covalent organic framework bipolar membrane with charge asymmetry is finally obtained. The product provided by the invention has high selectivity, can realize efficient separation of protons and metal cations, and significantly improves the extraction and recovery purity of hydrochloric acid; through charge repulsion and pore size screening mechanisms, separation of different anions can be further realized, and selective recovery of acid molecules is enhanced.

The invention discloses a double-response collagen-based conductive hydrogel, a medicine and a preparation and application method of the double-response collagen-based conductive hydrogel. The preparation method of the double-response collagen-based conductive hydrogel comprises the following steps: carrying out chemical modification on polysaccharide through 3-aminophenylboronic acid, and then carrying out sodium periodate oxidation treatment to obtain a dialdehyde polysaccharide grafted aminophenylboronic acid copolymer; the preparation method comprises the following steps: performing hydrazide modification on collagen through adipic acid dihydrazide, and performing free radical polymerization with aniline to obtain a hydrazide collagen grafted polyaniline copolymer; the dialdehyde polysaccharide grafted aminophenylboronic acid copolymer and the hydrazide collagen grafted polyaniline copolymer are subjected to crosslinking, and the double-response collagen-based conductive hydrogel capable of responding to glucose and the pH value is obtained. Compared with single-response conductive hydrogel, the hydrogel can specifically respond to the microenvironment of chronic diabetic wound surfaces and release antibacterial and anti-inflammatory drugs, and high-quality healing of chronic wounds such as diabetic foot ulcers and the like is promoted.

The invention provides a high-strength low-temperature-resistant polyurethane material and a preparation method thereof, and belongs to the technical field of polyurethane materials. According to the invention, polyether polyol and diisocyanate are taken as base materials, a hydrazide chain extender is introduced as a first chain extender, multiple hydrogen bonds contained in the first chain extender can form a physical cross-linked network, methacrylic acid modified cyclodextrin is introduced as a second chain extender, and a double-bond polymerization reaction is carried out under the action of an initiator to form a chemical cross-linked network. According to the invention, non-covalent bond multiple hydrogen bonds and covalent cross-linking are combined, and a physical cross-linked network formed by the non-covalent bond multiple hydrogen bonds is dissociated in the deformation process to fully dissipate energy, so that the material keeps excellent tensile property. Covalent cross-linking is mainly concentrated around cyclodextrin molecules, the cross-linking density of the material is improved by improving the double bond modification quantity, the movement of polymer chain segments is not excessively limited, the tensile strength of the polymer is improved, the elongation at break can be kept, the toughness is improved, and meanwhile, good low-temperature resistance is shown.

The invention belongs to the technical field of asphalt preparation, and provides a high-modulus composite modified asphalt material based on natural asphalt and a preparation method thereof. The method comprises the following steps: separating natural asphalt into a high-molecular asphaltene section and a medium-low-molecular colloid section, and preparing activated asphaltene and colloid sections through alkali treatment and spray drying; a styrene-butadiene-styrene block copolymer and a polyurethane prepolymer are taken as the basis, and a dynamic cross-linked polymer is synthesized through the steps of hydrazide treatment, boric acid group introduction, glutaraldehyde cross-linking and the like; organic modified clay and phenylated chitosan are prepared, a polyaniline composite material is prepared through in-situ polymerization of aniline, a PANI-clay-biomass compound is obtained, the ultraviolet absorption characteristic of polyaniline and the shielding effect of montmorillonite cooperate, the ultraviolet aging resistance of the material is improved, through multi-stage temperature control dispersion, the anti-aging performance of the material is improved, and the anti-aging performance of the material is improved. The various modified materials are compounded with a natural asphalt substrate to obtain the high-modulus composite modified asphalt material based on the natural asphalt.

The invention discloses HA-PAS hydrogel for enhancing cartilage repair of early osteoarthritis and a preparation method of the HA-PAS hydrogel. According to the hydrogel, formylated hyaluronic acid, hydrazide modified low-methoxyl pectin and phenylboronic acid modified alginate form a ternary polysaccharide skeleton, a double-dynamic cross-linked network is formed through acylhydrazone bonds and boric acid ester bonds, and a triple network structure is formed by combining permanent cross-linking catalyzed by horse radish peroxidase. The hydrogel integrates functional components such as nano-selenium, a pulullan-strontium chelate and a mesenchymal stem cell source exosome, so that multiple effects of resisting oxidation, resisting inflammation, promoting cartilage differentiation and repairing subchondral bones are achieved. The compression modulus of the hydrogel is 0.8-1.5 MPa, and the hydrogel can be injected for in-situ gelling and MMP responsive degradation, shows an excellent cartilage repair effect in animal experiments, and provides a new solution for treatment of early osteoarthritis.

The invention provides an ultralow-temperature-resistant bio-based polyurea-polyurethane adhesive and a preparation method of the ultralow-temperature-resistant bio-based polyurea-polyurethane adhesive. The adhesive is prepared from the following raw materials in molar ratio: 0.5 of polyhydric alcohol; 1.0 part of isocyanate; 1.6 to 1.8 parts of hydrazide; and 0.6 to 0.8 part of vanillin dimer. The adhesive prepared by the invention has a very good bonding effect on 304 stainless steel, and can be used at an ultralow temperature. A polymer network contains rich polar groups such as carbamate and urea bonds, and the polar groups can form hydrogen bonds or other chemical bonds with substances such as oxides on the surface of metal, so that the adhesive has relatively high adhesive capacity on various base materials. According to the invention, the cheap and environment-friendly bio-based chain extender is used as a raw material, and a flexible polymer chain is used as a soft segment, so that the adhesive is endowed with the use performance at ultralow temperature while the high shear strength of the adhesive is ensured.

The invention discloses a preparation method of a photo-thermal conversion-phase change heat storage polyurethane flexible film, and relates to the technical field of polyurethane phase change materials. According to the invention, polyethylene glycol is used as a polymeric monomer and a phase change heat storage substrate, diisocyanate and dimethylolbutyric acid are used as reaction monomers, any one of 3, 3-dithio-bis-propionyl hydrazide or (R, R)-3, 3 '-diseleno-bis (2-aminopropionic acid) is used as a cross-linking agent, and transition metal carboxylate and a nano photo-thermal conversion agent are introduced to prepare the phase change heat storage material. And the polyurethane flexible film with photo-thermal conversion-phase change heat storage is prepared. A hydrazide group at the tail end of a cross-linking agent and an isocyanate group are subjected to nucleophilic addition reaction to generate a hydrazide-urea structure of which the main chain contains disulfide bonds and constructs multiple hydrogen bonds, and meanwhile, a metal carboxylate coordination bond is introduced, so that the film is endowed with an excellent mechanical response effect in a wide temperature range; the nano photo-thermal conversion agent is added into the system, so that the system has good photo-thermal conversion performance.

The invention generally relates to nuclear transport modulators, e.g., CRM1 inhibitors, and more particularly to a compound represented by structural formula I:or a pharmaceutically acceptable salt thereof, wherein the values and alternative values for the variables are as defined and described herein. The invention also includes the synthesis and use of a compound of structural formula I, or a pharmaceutically acceptable salt or composition thereof, e.g., in the treatment, modulation and / or prevention of physiological conditions associated with CRM1 activity.

The invention relates to the technical field of high polymer materials, and discloses a furyl polyurethane adhesive and a synthesis method thereof, polymer polyol is used as a soft segment, isocyanate and two specific furyl chain extenders are used as hard segments, polymerization is performed through a one-step method, and the method has the advantages of simple process, short flow, mild reaction conditions and the like. Wherein a furan ring and an amide group of the two specific furyl chain extenders endow the material with rigidity and excellent bonding performance, and form a high-density hydrogen bond network with a hydrazide group, so that the mechanical strength, the toughness and the bonding performance of the material are remarkably improved. By regulating and controlling the proportion of the components, the rigidity and flexibility of the material can be effectively balanced, so that the polyurethane adhesive with excellent comprehensive performance is prepared. The furyl polyurethane adhesive prepared by the invention has relatively high adhesion strength and mechanical strength, and can be applied to the fields of buildings, automobile manufacturing, medical treatment, packaging, aerospace, electronics and the like.

A thermosensitive recording medium for a linerless label is provided. The thermosensitive recording medium includes a support, a thermosensitive recording layer, a protective layer, and a release layer. The release layer includes at least one selected from the group consisting of epichlorohydrin, polyamide epichlorohydrin, an oxazoline derivative, hydrazine, and a hydrazide derivative. The thermosensitive recording layer, the protective layer, and the release layer are disposed on one side of the support.

The invention relates to the technical field of pesticides, in particular to a hydrazide derivative containing a 3, 4-dihydroisoquinoline structure, a preparation method and application. The hydrazide derivative containing the 3, 4-dihydroisoquinoline structure is a compound as shown in a formula (I), or a stereoisomer, a tautomer, an isotope derivative and a pesticide acceptable salt thereof. The hydrazide derivative containing the 3, 4-dihydroisoquinoline structure has broad-spectrum inhibitory activity on phytopathogens such as plant pathogenic fungi, especially has excellent inhibitory activity on basidiomycota and ascomycomycota pathogenic fungi such as gaeumannomyces graminis, physalospora piricola, sclerotinia sclerotiorum, botrytis cinerea and rhizoctonia solani, and has broad-spectrum inhibitory activity. The bactericide is expected to be developed into a novel green bactericide which is efficient, safe, economical and environment-friendly.

The invention discloses a perovskite solar cell doped with a sulfonyl hydrazide foaming agent and a preparation method thereof, and belongs to the field of photovoltaic power generation, a perovskite light absorption layer is FA1-x-yMAxCsyPb (I1-zBrz) 3 doped with the sulfonyl hydrazide foaming agent, x is equal to 0-1, y is equal to 0-1, and z is equal to 0-1. The sulfonyl hydrazine foaming agent interacts with uncoordinated Pb < 2 + > and I <->, and the sulfonyl hydrazine foaming agent is decomposed in the thermal annealing process to induce crystal grains to realize secondary fusion growth, so that defects in the perovskite light absorption layer are effectively passivated, recombination of photon-generated carriers of the perovskite solar cell is reduced, and the photoelectric conversion efficiency of the perovskite solar cell is improved. The open-circuit voltage, the fill factor and the photoelectric conversion efficiency of the perovskite solar cell are obviously improved, and the device efficiency PCE exceeds 26%; according to the preparation method provided by the invention, the p-i-n inversion structure device is prepared by spin coating through a one-step method, the preparation process is simple and convenient, and the cost is low.

This application relates to the field of polyurethane adhesives, specifically disclosing a bio-based polyurethane hot melt adhesive and its preparation method. The bio-based polyurethane hot melt adhesive and its preparation method comprise the following raw materials by weight: 80-120 parts of oligomeric polyol, 10-40 parts of polyisocyanate, 1-15 parts of modified amino acid chain extender, 1-10 parts of hydrazide chain extender, 10-30 parts of tackifying resin, 0.1-0.5 parts of antioxidant, and 0.01-0.1 parts of catalyst. Furthermore, the preparation method of the present application provides the hot melt adhesive with high hydrolysis resistance, high initial tack, and high bonding strength.

A water-based coating composition comprising: water, (a) a binder comprising (a1) a core-shell latex copolymer with side-mounted carbonyl groups, and (b) a crosslinker comprising (b1) at least one polyhydrazide compound having at least two hydrazide groups of the formula -C(=O)-NH-N(R h )(R i ) includes, where R h and R i independent H or C1-C 12 -Alkyl groups, where the molar ratio of hydrazide groups to carbonyl groups is 5:1 to 1:5 in the composition.

The present application relates to the technical field of rubber, in particular to a kind of hydrazide compound, rubber composition and its preparation method and application.The present application provides a kind of hydrazide compound, is mono-hydrazide compound or double hydrazide compound, they have lower melting point, can be well dispersed in rubber matrix in the range of mixing temperature, further ensure its effect.And the hydrazide compound of this kind is added to rubber composition, can obtain the tire product of processing performance improvement, dynamic modulus promotion, anti-wet sliding and balanced rolling resistance.

The present invention belongs to the field of medicinal chemistry, and relates to an aromatic hydrazide derivative and the medical use thereof. Specifically, disclosed in the present invention are an aromatic hydrazide derivative, and a stereoisomer, tautomer or pharmaceutically acceptable salt thereof. Further discloses are a preparation method of the compound and the use of the compound in preventing and / or treating tumor diseases. The compound shows a good application prospect in preventing and / or treating tumors related to MAPK pathways.

The invention discloses a 3D printing polyurethane elastomer as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The polyurethane elastomer is composed of a prepolymer containing a dynamic hydrazide urea bond and a hindered urea bond and a monomer containing primary amine, the prepolymer takes polyether polyol and diisocyanate as basic raw materials, a dynamic hydrazide urea bond hard segment is introduced into the prepolymer through a hydrazide chain extender, a side chain is introduced through glycidyl methacrylate, and the primary amine-containing monomer is prepared. A dynamic hindered urea bond and a photocuring group are introduced through an acrylate end-capping reagent, and a reactive diluent and a photoinitiator are matched to optimize the forming performance. In the preparation process, a prepolymer and a primary amine-containing monomer are mixed and then subjected to 3D printing forming, in the low-temperature stage, reversible exchange of dynamic hydrazide urea bonds and hindered urea bonds is promoted to heal interlayer defects, and in the high-temperature stage, the hindered urea bonds are triggered to break and react with primary amine to form a stable cross-linked network. The 3D printing polyurethane elastomer has excellent rebound resilience, mechanical strength and hydrophobic effect.

The application belongs to the field of citrus cultivation, and particularly relates to a citrus coloring and sweetening composition and application. The main components of the citrus coloring and sweetening composition are maleic hydrazide and ethylene, and the mass ratio of the maleic hydrazide to the ethylene is 2:(1-4). The application is prepared by compounding maleic hydrazide and ethylene. The test results show that the application can promote early coloring of citrus, prevent reverse acidification of citrus after application of maleic hydrazide, increase average sugar content of citrus, has no negative effect on growth of citrus, has no pollution to the environment, and can be widely used in planting and production of different regions and different citrus varieties.

This invention belongs to the field of mineral flotation technology, and discloses a flotation collector for non-ferrous metal sulfide ores, its preparation method, and its application. The collector uses O,O-dialkyldithiophosphate as a starting material, and reacts sequentially with a halocarboxylic acid ester, hydrazine hydrate, potassium hydroxide, and carbon disulfide in anhydrous ethanol in a three-step reaction to obtain the target product, O,O-dialkyldithiophosphate hydrazide-N′-dithiocarbamate potassium. Its molecular structure simultaneously contains three active groups: a dithiophosphate group, an hydrazide group, and a dithiocarbamate group. This invention achieves efficient process connection and smooth transition by optimizing the material ratio, temperature, and time of each reaction step, and has advantages such as mild reaction conditions, simple operation, few side reactions, high yield, and stable product. The prepared collector exhibits excellent collecting performance and good selectivity for non-ferrous metal sulfide ores such as chalcopyrite, and is suitable for widespread application in sulfide ore flotation processes.

This invention relates to the field of polymer materials technology, specifically proposing a self-healing UV-curable electroplated aluminum color coating and its preparation method. By weight, it comprises: 30-50 parts polyurethane acrylic resin, 10-25 parts modified acrylic oligomer containing dynamic covalent bonds, 2-5 parts photoinitiator, 3-8 parts hydrophobically modified nanofiller, and 1-3 parts crosslinking agent. The dynamic covalent bonds are selected from at least one of hydrazide bonds, borate ester bonds, and Diels-Alder bonds. This invention achieves rapid self-healing and thermally triggered remodeling of the coating at room temperature through the introduction of a gradient energy synergistic network of dynamic covalent bonds and quadruple hydrogen bonds. Simultaneously, the microphase separation design of the hydrophobic core-shell filler and grafted modified silicon carbide nanowires enhances hydrolysis resistance.

The invention discloses an anti-inflammatory and anti-aging body lotion and a preparation method thereof, and relates to the technical field of skin care products. The preparation method comprises the following steps: firstly, carrying out oxidation treatment on beta-cyclodextrin by using sodium periodate, and introducing an active aldehyde group on a glucose unit of the beta-cyclodextrin, so as to form aldehyde beta-cyclodextrin with a unique function; the cavity structure of the beta-cyclodextrin has efficient embedding capacity, and the hydrophobic coenzyme Q10 can be tightly wrapped in the beta-cyclodextrin; the preparation method comprises the following steps: grafting adipic acid dihydrazide onto a hyaluronic acid skeleton to form hydrazinized hyaluronic acid with reaction activity; the hyaluronic acid is subjected to specific cross-linking reaction with aldehyde beta-cyclodextrin through hydrazino on the surface of the hyaluronic acid, a micro-capsule structure with a dynamic covalent bond-hydrazone bond is formed, a three-stage delivery mode of stable storage, intelligent release and accurate action is formed, active ingredients can be effectively protected, intelligent release can be achieved according to the pH value characteristic of skin, and the skin care effect is achieved. The inflammatory reaction is relieved, and the anti-inflammatory and anti-aging effects are achieved. The body lotion prepared by the invention has anti-inflammatory and anti-aging effects.

The present invention discloses a multifunctional ionic porous organic cage material, its preparation method and chromium adsorption application, belonging to the technical field of porous organic materials. In the present invention, a porous organic cage material NKPOC-PH is synthesized using tetraaldehyde m-cyclocucurbit[4]arene and pyridine-3,5-dicarboxylic dihydrazide as reaction monomers, and then it is modified with methyl iodide to obtain ionic NKPOC-PH(I)Me. The present invention uses an easily modified porous organic cage as the substrate to construct triple synergistic adsorption sites of redox, coordination and electrostatics. Pyridine groups in the material are used as the introduction points of electrostatic sites, hydrazide linking groups as redox sites, and nitrogen-rich sites to adsorb dichromate ions through coordination. The obtained ionic porous cage can achieve an ultra-high chromium adsorption performance with a saturated adsorption capacity exceeding 1.3 g / g under acidic (pH = 3-4) aqueous phase conditions. The ionic porous organic cage material described in the present invention provides a new solution for adsorbing dichromate ions under aqueous phase conditions.

The present invention discloses an itaconyl hydrazide-induced Janus structure polymer, which is a polymer prepared by gradient polymerization under ultraviolet light using itaconyl hydrazide and vinyl monomer as main raw materials. The present invention also discloses an itaconyl hydrazide-induced Janus structure polymer epidermal patch electrode, which is an epidermal patch electrode obtained by connecting the polymer to the electrode and integrating it into a signal processing module. The itaconyl hydrazide-induced Janus structure of the present invention and the hydrogen bond network formed thereby give the polymer excellent stretchability, flexibility, and homogeneous conformal properties, which can ensure the high signal-to-noise ratio, high stability and reliability of the polymer epidermal patch electrode for electrocardiogram signal monitoring. The polymer epidermal patch electrode of the present invention can be used for electrocardiogram signal monitoring in different environments, different motion states, and when worn for a long time, and is particularly applicable to the application of epidermal patch electrodes in wearable health monitoring.

The invention discloses a cushion rubber composition with high fatigue performance as well as a preparation method and application thereof, and belongs to the technical field of rubber tires. According to the invention, N326 is used as main reinforcing carbon black in the cushion rubber and is matched with the hydrazide compound, and the fatigue performance of the cushion rubber formula is improved by using high-precision / purity N326 carbon black and adjusting formula components; due to the application of high-precision / purity N326, the heat generation of the formula is improved, so that the fatigue performance of the formula is reduced; a complex generated by the hydrazide compound and zinc oxide can stabilize cross-linking bonds and cross-linking density, and degradation and fatigue performance reduction caused by heat accumulation in the repeated movement process of the rubber material are avoided.

To provide an adhesive film which exhibits low temperature quick curability and good adhesive strength and connection reliability, can be narrowly and stably slit, and has good temporary stickiness.SOLUTION: An adhesive film has a base material film subjected to release treatment, and an insulation resin layer which is provided thereon and exhibits radical polymerizability and anion polymerizability, and has a film width of 1.0 mm or less, further 0.8 mm or less, and has a length of 5 m or more. The insulation resin layer contains: a radical polymerization initiator which contains a film-formation component containing two kinds of film components having different molecular weights, a radical polymerizable component containing a first acrylic compound, an anion polymerizable component containing an epoxy-based compound, and an organic peroxide having a one-min half-life temperature of 125°C or lower; and an anion polymerization curing agent which is solid at normal temperature and contains an organic acid hydrazide compound.SELECTED DRAWING: Figure 1A

The invention provides a preparation method of a bio-based reversible cross-linked polyurethane hot melt adhesive. The method comprises the following steps: firstly, carrying out polymerization reaction on bio-based polyol PO3G (poly trimethylene ether glycol) and isophorone diisocyanate which are used as raw materials to prepare an isocyanate-terminated bio-based prepolymer; then, diethyl toluenediamine and isophthaloyl hydrazine are adopted as a mixed chain extender for a chain extension reaction, and after drying treatment, the bio-based polyurethane hot melt adhesive is obtained. The bio-based hot-melt adhesive prepared by the invention is suitable for hot-melt sealants in the field of electronic devices. The adhesive shows good bonding performance to a stainless steel base material, the tensile shear strength reaches 0.45-0.5 MPa, the adhesive has excellent reversible disassembly characteristic, and convenient separation of a bonding interface can be achieved by heating at 100 DEG C for 10 minutes.

The invention discloses a COF-based heterogeneous iodobenzene catalyst and its preparation method and application, belonging to the field of catalyst preparation technology. The COF-based heterogeneous iodobenzene catalyst is obtained by polymerizing a hydrazide monomer containing an iodophenyl group unit and 1,3,5-tris(4-formylphenyl)triazine; the structural formula of the hydrazide monomer containing an iodophenyl group unit is: The COF-based heterogeneous iodobenzene catalyst can be used as a catalyst for the chlorination reaction of anisole, catalyzing the chlorination reaction of anisole, achieving heterogeneous catalysis, and using a small amount, easy to recover, improving the utilization rate of the catalyst, and reducing the cost of anisole chlorination.

A film-forming thermoset coating composition includes: (a) an aqueous medium; and Option 1 and / or Option 2 as follows: Option 1: (b1) polyurethane-acrylate core-shell particles including a polymeric acrylic core at least partially encapsulated by a polymeric shell including urethane linkages, where the polymeric shell includes an acid functional group and two or more hydrazide functional groups, where the polymeric shell is covalently bonded to at least a portion of the polymeric core; and (c1) (i) formaldehyde; (ii) polyformaldehyde; and / or (iii) a compound that generates formaldehyde; Option 2: (b2) polyurethane-acrylate core-shell particles including a polymeric acrylic core at least partially encapsulated by a polymeric shell including urethane linkages, where the polymeric shell includes an acid functional group and two or more N-methylolated hydrazide functional groups, where the polymeric shell is covalently bonded to at least a portion of the polymeric core.