摘要:
A windmill blade which comprises reinforcing fibers in a toughened resin matrix. The resin matrix is made from a composition which comprises (a) one or more epoxy resins and/or one or more epoxy vinyl ester resins, (b) one or more reactive diluents, and (c) at least one amphiphilic block copolymer. The amphiphilic block copolymer comprises at least two different polyether blocks and is present in the composition in an amount of from about 0.5% to about 10% by volume, based on the total volume of the matrix composition.
摘要:
A windmill blade which comprises reinforcing fibers in a toughened resin matrix. The resin matrix is made from a composition which comprises (a) one or more epoxy resins and/or one or more epoxy vinyl ester resins, (b) one or more reactive diluents, and (c) at least one amphiphilic block copolymer. The amphiphilic block copolymer comprises at least two different polyether blocks and is present in the composition in an amount of from about 0.5% to about 10% by volume, based on the total volume of the matrix composition.
摘要:
Curable epoxy resin compositions, cured epoxy resin compositions, and processes of forming the same, including at least one epoxy resin, at least one sterically hindered amine curing agent and at least one non-sterically hindered amine curing agent which provides toughness properties to the curable composition and resultant cured product made from the curable composition.
摘要:
A curable epoxy resin composite composition including a reinforcing material and an epoxy resin composition, and a process for preparing a composite from such composition; wherein a combination of at least one alkanolamine and at least one styrenated phenol are present in the epoxy resin composition in a sufficient amount to increase the rate of reaction of the at least one epoxy resin and the at least one alkanolamine curing agent while maintaining the thermal and mechanical properties of the composite upon curing of the epoxy resin composition.
摘要:
A curable epoxy resin composite composition including a reinforcing material and an epoxy resin composition, and a process for preparing a composite from such composition; wherein a combination of at least one alkanolamine and at least one styrenated phenol are present in the epoxy resin composition in a sufficient amount to increase the rate of reaction of the at least one epoxy resin and the at least one alkanolamine curing agent while maintaining the thermal and mechanical properties of the composite upon curing of the epoxy resin composition.
摘要:
A resin formulation for use in a vacuum resin infusion molding process, said formulation comprising (a) a divinylarene dioxide, and (b) a polyaminoether; wherein the polyaminoether does not have pendent hydroxyl groups; and wherein the resin formulation may have a low viscosity of less than about 400 mPa-s.
摘要:
A resin formulation for use in a vacuum resin infusion molding process, said formulation comprising (a) a divinylarene dioxide, and (b) a polyaminoether; wherein the polyaminoether does not have pendent hydroxyl groups; and wherein the resin formulation may have a low viscosity of less than about 400 mPa-s.
摘要:
A process for preparing a postformable composite article of a heat curable thermosetting polymer having a substantial length and a non-trivial uniform cross-sectional shape. The process includes controlling the pull rate and the temperature of the heating and cooling sections of the die in response to the viscosity and the cure kinetics of the thermosetting polymer composition and (2) the non-trivial shape of the article.
摘要:
A method and apparatus are disclosed for the fabrication of pultruded articles. The apparatus includes a means for heating the interior of a bundle of resin-wetted reinforcing material prior to the bundle passing into a heating forming die which heats the exterior of the bundle. Insertion of a thermocouple wire into the interior of the bundle prior to the bundle passing into the heated forming die allows the temperature of the bundle interior to be monitored during the curing process that occurs within the heating forming die. Adjustment of the bundle interior temperature relative to the bundle exterior temperature eliminates stresses caused by adverse thermal gradients that normally would exist without the use of such a bundle interior heater. Use of such a bundle interior heater allows the pultrusion of parts having a greater or thicker cross section than those now normally available.