Impact resistant transparent thermoplastic compositions
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United States of America Patent
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Jun 5, 2018
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app pub date -
Oct 15, 2013
filing date -
Oct 16, 2012
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Abstract
The invention relates to impact-modified, thermoplastic compositions, where the measured refractive index difference between the impact modifier particles and the matrix composition is greater than 0.008 units, yet a blend of the impact modifier particles in the matrix produces a transparent composition. The impact modifier particles are preferably impact modifier composite particles, being intimately blended with one or more polymeric process aids or dispersing aids. The polymeric process aids are physically or chemically attached to the impact modifier particles, forming composite particles that allow for facile powder isolation. The impact modifier composite particles provide improved physical, chemical, and/or rheological properties to the thermoplastic composition. Preferably the impact modifier particles of the invention are core-shell impact modifiers.
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