摘要:
An extrudable fluoroelastomer comprising a gelled fluoroelastomer having units of vinylidene fluoride and units of at least one other fluorine-containing monomer copolymerizable with vinylidene fluoride, said monomer containing from 2-7 carbon atoms, containing no bromine atoms and containing at least as many fluorine atoms as carbon atoms, said fluoroelastomer having been simultaneously mixed, sheared and gelled by an organic peroxide gelling agent to a gel content of from about 15-80% by weight, measured in methyl ethyl ketone at 80°C.
摘要:
In a process of crosslinking a rubber compound with the usage of an organic peroxide as the crosslinking agent, is incorporated to the rubber compound in an amount of 0.5 - 20 parts by weight per 100 parts of a rubber substrate a compound selected from imidazole type compounds, thiourea type compounds, thiazole type compounds, thiuram type compounds, dithiocarbamate type compounds, phenol type compounds, triazole type compounds and amine type compounds. The process results no surface tackiness of the rubber product crosslinked in the presence of oxygen.
摘要:
A resin for an information recording medium comprising a polymer characterized by having a crosslinked structure and a process for producing such a resin by charging a mold with a monomer component which comprises a monomer having at least two polymerizable double bonds and/or the prepolymer of the monomer and polymerizing the monomer component in the mold.
摘要:
A curable powder composition comprising two or more separate powdered reactive components is provided with a thin coating of binder on the powder particles under conditions which leave the particles separate from one another. This composition can be rendered cohesive, e.g. by compression, to form self-supporting but surprisingly flexible sheets or other articles of the curable adhesive, while retaining the particles in discrete form within the sheet to retain the desirable balance of storage life against curing performance derived from the particulate form of the reactants.
摘要:
A cure system for halogen-containing polymers that comprises a thiourea derivative, a thiuram sulfide and an inorganic base yields stable cross-linked products with useful properties when incorporated into normal vulcanization procedures.
摘要:
A hydrogel which comprises polymerised moieties derivable from (i) at least one polymerisable cyclic (thio)ether and (ii) at least one hydrophilic homo- or copolymer.
摘要:
A laminated film structure composed of a polyester film and an electroconductive metal layer laminated to at least one surface of the polyester resin film, characterized in that said polyester film is an unstretched film of a cured aromatic polyester having a crosslinking degree of not less than 70%, a swelling degree of not more than 30 and an elongation at room temperature of not less than 10%.
摘要:
Soft and low-density foam materials, obtained by means of an extrusion expansion (with physical blowing agents) of particular copolymers of ethylene with vinylacetate (and/or with alkyl esters of acrylic or methacrylic acid), are found to be very suitable for the manufacture of expanded articles with little shrinkage after expansion, free from creases on the surface or cracks on the cell walls, and having excellent characteristics, higher compressive strength and so on.