Blends of poly[α-methylenelact(one)(am] homo- and copolymers
AssigneeE. I. Du Pont de Nemours and Company
InventorsCharles J. Brandenburg, David M. Dean, George Henry Hofmann, Rutger D. Puts, Edmund A. Flexman
Life of this patent
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Abstract
Polymers containing α-methylenelact(ones)(ams) such as α-methylenebutyrolactones are useful in blends with other polymers. For examples such polymers which have reactive groups are toughened by mixing with a rubbery material which has complimentary reactive groups, or polymers containing repeat units derived from α-methylenelact(ones)(ams) are toughened by mixing with polymeric core-shell particles having an elastomeric core and a specified thermoplastic shell. The properties of thermoplastics are also improved by blending with α-methylenelact(ones)(ams) such as α-methylenebutyrolactones containing (co)polymers.
Claims19
A composition, comprising:
- (a) a first polymer comprising the repeat units:
- (i) at least about 10 mole percent of the total repeat units of
- (ii) at least about 0.1 mole percent of a repeat unit containing a first reactive functional group;
- (iii) up to about 89.9 mole percent of repeat units derived from one or more monomers which are free radically copolymerizable with (a)(i) and (a)(ii);
- and
- (b) about 1 weight percent to about 50 weight percent based on the total weight of (a) and (b), of a second polymer which is elastomeric and contains a second reactive functional group which may react with said first reactive functional group;
- or
- (c) a third polymer comprising the repeat units
- (i) at least about 10 mole percent of the total repeat units of
- (ii) up to about 90 mole percent of repeat units derived from one or more monomers which are free radically copolymerizable with (b)(i);
- and
- (d) about 1 percent by weight to about 60 percent by weight based on the total weight of (c) and (d), of a fourth polymer which is core-shell particles made up of an elastomeric polymer core and a polymeric thermoplastic shell, said thermoplastic shell comprising repeat units derived from methyl methacrylate;
- wherein:
- n is 0, 1 or 2;
- X is —O— or —NR9—;
- and
- R1, R2, R5, R6, R9, each of R3, and each of R4, are independently hydrogen, hydrocarbyl or substituted hydrocarbyl.
Dependencies are inferred from the claim text.