Rubber-modified resin blends
AssigneeThe Dow Chemical Company
InventorsEugene R. Moore, Thomas D. Traugott
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Abstract
An impact resistant polymeric composition and a process for its production. The composition comprises a rigid polymeric matrix comprising an anionically polymerized copolymer of at least one isopropenyl aromatic monomer and at least one vinyl aromatic monomer, said matrix having dispersed therein an elastomeric phase comprising at least one moderately cross-linked ungrafted rubber and at least one moderately cross-linked lightly-grafted rubber, wherein the lightly-grafted rubber has a graft-to-rubber ratio of 0.9:1 or less. The elastomeric phase is melt agglomerated to provide aggregates having particle sizes in the range from 3,000 to 100,000.
Claims20
A blended composition comprising:
- a rigid matrix continuous phase comprising at least one anionically polymerized copolymer of at least one isopropenyl aromatic monomer and at least one vinyl aromatic monomer;
- and
- an elastomeric discontinuous phase dispersed in said matrix phase comprising a melt-agglomerated mixture of at least one cross-linked ungrafted rubber and at least one cross-linked lightly-grafted rubber.
Dependencies are inferred from the claim text.