Dispersion method for the preparation of particle reinforced polymer compositions
AssigneeCytec Engineered Materials Limited
InventorsJonathan Edward Meegan, Olivia Smith
Life of this patent
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Abstract
Method of preparing a particle dispersion within a polymer is disclosed. The dispersion may include core shell rubber particles and the polymer may include epoxies. The particles are capable of being substantially dispersed within the polymer so as to substantially inhibit agglomeration of the particles. Mechanical properties, such as toughness are improved while glass transition temperature and viscosity are not substantially impaired by the presence of the particles.
Claims19
A method of preparing a particle dispersion within a resin, comprising:
- combining an aqueous dispersion of core shell rubber particles with an organic liquid to form a particle mixture;
- adding a resin mixture comprising the same organic liquid and a resin to the particle mixture to form a particle-resin mixture;
- adding a water-soluble salt to the particle-resin mixture to drive the separation of organic and aqueous layers within the particle-resin mixture;
- and
- substantially removing the separated aqueous layer from the particle-resin mixture.
A method of preparing a particle reinforced composite, comprising:
- providing an aqueous dispersion of core-shell rubber particles, each particle comprising an inner core and an outer shell;
- combining the aqueous dispersion of core shell rubber particles with a first organic liquid;
- adding the combined core shell rubber particles and first organic liquid to a mixture comprising an epoxy monomer and the same first organic liquid to form a particle-epoxy mixture;
- adding a water-soluble salt to the particle-epoxy mixture to induce separation of organic and aqueous layers within the particle-epoxy mixture;
- and
- removing the separated aqueous layer from the particle-epoxy mixture;
- removing the organic liquid from the particle-epoxy mixture to yield a dispersion of particles in epoxy;
- adding a hardener compound to the dispersion of particles in epoxy;
- and
- thermally curing the dispersion of particles in epoxy.
A method of preparing a dispersion of core shell rubber particles within an epoxy, comprising:
- combining an aqueous dispersion of core shell rubber particles with methyl ethyl ketone to form a particle mixture;
- adding an epoxy mixture comprising methyl ethyl ketone and an epoxy to the particle mixture to form a particle-epoxy mixture;
- adding a water soluble salt to the particle-epoxy mixture to drive the separation of organic and aqueous layers within the particle-epoxy mixture;
- and
- removing the separated aqueous layer from the particle-epoxy mixture;
- and
- removing the separated organic layer from the particle-epoxy mixture to yield a dispersion of particles within the epoxy.
Dependencies are inferred from the claim text.