Functionalized (co) polymers for adhesive systems
A technology of polymers and homopolymers, applied in the direction of adhesives, adhesive products, adhesive types, etc., can solve the problems of odor extrusion tendency, unfavorable, and failure to reach adhesives, etc.
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preparation example Construction
[0091] The preparation of epoxy-functional (co)polymers is achieved by (co)polymerization of parent (co)monomers and can be carried out in substance (in bulk), in the presence of one or more organic solvents, in the presence of water or Carried out in a mixture of organic solvents and water. The aim here is to keep the amount of solvent used as low as possible. Suitable organic solvents are pure alkanes (e.g. hexane, heptane, octane, isooctane, isohexane, cyclohexane), aromatic hydrocarbons (e.g. benzene, toluene, xylene), esters (e.g. ethyl acetate , propyl acetate, butyl acetate or hexyl acetate), halogenated hydrocarbons (such as chlorobenzene), alkanols (such as methanol, ethanol, ethylene glycol, ethylene glycol monomethyl ether), ketones (such as acetone, butanone ) and ethers (eg diethyl ether, dibutyl ether) or mixtures thereof. Avoid compounds that can react with, or initiate or catalyze, the reaction of epoxy functional groups prior to initiating the curing reactio...
Embodiment
[0280] Raw materials used:
[0281] 52 2,2-azobis(2,4-dimethylvaleronitrile) from DuPont
[0282] TTA15 3,4-epoxycyclohexylmethyl methacrylate from Tetrachem
[0283] CXC 1614 Trifluoromethanesulfonic acid based quaternary ammonium salt thermal activator from King Industries
[0284] 530 Polyurethane from Covestro
[0285] Uvacure 1500 (3',4'-Epoxycyclohexane)methyl(3,4-epoxy-cyclohexyl)carboxylate from Allnex
[0286] Preparation of Adhesive Composition and Reactive Tape Samples:
Embodiment A
[0288] A pressure-resistant 2 L polymerization reactor of the conventional type for free-radical polymerization was charged with 100 g of 3,4-epoxycyclohexylmethyl methacrylate and 396 g of methyl ethyl ketone. After passing nitrogen through for 45 minutes while stirring, the reactor was heated to a product temperature of 70°C and evacuated to boil. Subsequently, 2.0 g of 2,2-azobis(2,4-dimethylvaleronitrile) dissolved in 4.0 g of methyl ethyl ketone was added. The reaction was carried out at a constant product temperature of 70°C under evaporative cooling. After a reaction time of 1 hour, 100 g of 3,4-epoxycyclohexylmethyl methacrylate, which had been preheated to 70° C. and through which nitrogen had been passed for 45 minutes, was added, and 2.0 g 2,2-Azobis(2,4-dimethylvaleronitrile). After a reaction time of 2 hours, 100 g of 3,4-epoxycyclohexylmethyl methacrylate, which had been preheated to 70°C and through which nitrogen had been passed for 45 minutes, was added, and...
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