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1338results about How to "Achieve recyclability" patented technology

Foam of thermoplastic urethane elastomer composition and process for producing the foam

InactiveUS6849667B2Improve mechanical propertiesSolve uneven compositionPolymer scienceCarbamate
The method of the present invention for producing a urethane-based thermoplastic elastomer composition foam comprises the steps of:
    • adding and mixing 0.1 to 30 parts by weight of carbon dioxide (B) to 100 parts by weight of a urethane-based thermoplastic elastomer composition (A) in a molten state, wherein said urethane-based thermoplastic elastomer composition (A) comprises a urethane-based thermoplastic elastomer (A-1) and other thermoplastic elastomer (A-2) in an (A-1)/(A-2) ratio of 20/80 to 99/1 by weight, to form a molten urethane-based thermoplastic elastomer composition (C) which is in a state of a mixture of the urethane-based thermoplastic elastomer composition (A) and the carbon dioxide (B) (gas dissolving step); and
    • lowering a temperature of said molten urethane-based thermoplastic elastomer composition (C) (cooling step).
The present invention can produce the urethane-based thermoplastic elastomer foam of stable quality over a range from low foamed product to highly foamed product by adding a given quantity of carbon dioxide in the molten urethane-based thermoplastic elastomer quantitatively and stably. It can also produce the foam excellent in flexibility, thermal insulation and surface appearances. It is also excellent in safety, because of use of carbon dioxide in place of the common foaming agent of fluorochlorohydrocarbon or butane, thus causing no air pollution or destruction of the ozone layer.
Owner:MITSUI CHEM INC

Polyurethane foam supported liver/graphene/ titanium dioxide nano particle composite material, preparation method thereof and application thereof

The invention discloses a polyurethane foam supported liver / graphene / titanium dioxide nano particle composite material, a preparation method thereof and an application thereof. The material is a three-dimensional structure which is specifically that sliver / graphene / titanium dioxide ternary nano particles are uniformly loaded in the surface and a base body of the polyurethane foam. The preparation method comprises: preparing graphene / titanium dioxide binary nano particles; adding silver nitrate to carry out silver ion modification, thereby preparing silver / graphene / titanium dioxide ternary nano particles; and finally, quickly mixing and stirring a mixed solution of the silver / graphene / titanium dioxide nano particles and diphenyl methylpropane diisocyanate with a mixed solution of polyether polyol and dichloromethane, thereby preparing the polyurethane foam supported liver / graphene / titanium dioxide ternary nano particle composite material. The material provided by the invention has strong adsorption effect, and can degrade oil pollutants on the surface of a water body under irradiation of visible light, thereby achieving great potential in surface water remediation.
Owner:HOHAI UNIV
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