Polymer Mixtures for Injection-Molding Applications
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United States of America Patent
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Issued Date -
Apr 10, 2008
app pub date -
Oct 19, 2005
filing date -
Oct 19, 2004
priority date (Note) -
Abandoned
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Abstract
Molded part comprised of a polymer mixture, wherein a) the polymer mixture exhibits a synthetic first polymer P(i) and at least a second synthetic polymer P(j), that b) polymer P(i) exhibits a polymerization degree DP(P(i))>400 and at least one type of crystallizable sequences A with a polymerization degree DPs(P(i)) of these sequences of >15, that c) the polymer P(j) consists of the same monomer units as the sequences A of P(i), the polymerization degree DP(P(j)) of P(j) is <400, that d) the polymer mixture is mixed in a molecularly disperse manner, and a phase separation of the two polymers P(i) and P(j) is suppressed, and that e) the polymer mixture is shaped into a molded part by means of an injection molding process, wherein f) a network is formed during the solidification of the polymer mixture during heterocrystallization, characterized in that g) the percentage of p(j) at a polymerization degree of <12 in % w/w is <20.
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