Compatible polyblends
AssigneeRohm GmbH Chemische Fabrik
InventorsWerner Siol, Ulrich Terbrack
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Abstract
The invention relates to compatible polymer blend comprised of two disparate polymers, namely: (A) 1-99 wt. % of a first polymer comprised of monomer units of formula (I): ##STR1## wherein R.sub.1 is hydrogen or methyl, and R.sub.2 is ethyl or a hydrocarbon with 4-40 carbon atoms; and (B) 99-1 wt. % of a second polymer comprised of monomer units of formula (II): ##STR2## wherein R.sub.2 is hydrogen or methyl, and R.sub.4 is ethyl or a hydrocarbon group with 4-40 carbon atoms; and wherein: (a) the sum of (A)+(B)=100 wt. %; (b) when R.sub.2 and R.sub.4 are the same, then R.sub.1 and R.sub.3 are different, and when R.sub.1 and R.sub.3 are the same, then R.sub.2 and R.sub.4 are different; and (c) the groups R.sub.2 and R.sub.4 have similar van der Waals volumes.
Claims21
A compatible polymer blend of two disparate polymers, consisting essentially of:
- (A) 1-99 wt.% of a first polymer consisting essentially of monomer units of formula (I):
- ##STR13## wherein R.sub.1 is hydrogen or methyl, and R.sub.2 is ethyl or a hydrocarbon group with 4-40 carbon atoms;
- and
- (B) 99-1 wt.% of a second polymer consisting essentially of monomer units of formula (II):
- ##STR14## wherein R.sub.3 is hydrogen or methyl, and R.sub.4 is ethyl or a hydrocarbon group with 4-40 carbon atoms;
- wherein said polymers are compatible within room temperature to +200.degree. C., and are compatible in a partial range thereof which extends over at least 50.degree. C. and wherein
- (a) the sum of (A)+(B)=100 wt.%;
- (b) R.sub.1 and R.sub.3 are different;
- and
- (c) the groups R.sub.2 and R.sub.4 have similar van der Waals volumes.
Dependencies are inferred from the claim text.