Modified resin systems for liquid resin infusion applications and process methods related thereto
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United States of America Patent
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Nov 17, 2020
Grant Date -
Nov 16, 2017
app pub date -
Jul 18, 2017
filing date -
Dec 23, 2009
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Abstract
A manufacturing process, which includes: (i) preparing a preform; (ii) laying the preform within a mold; (iii) heating the mold to a predetermined temperature; and (iv) injecting a modified resin system, wherein the modified resin system is formulated to have a viscosity below a threshold viscosity at a specific temperature and a high level of toughness. In one embodiment, the modified resin system contains a combination of epoxies, a curing agent, core-shell rubber particles, a thermoplastic material in an amount of less than 7% by weight, wherein in a cured condition, the thermoplastic material is separated into aggregate domains from the base resin, each aggregate domain having an island-like morphology.
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