Bimodal block copolymer, process for manufacturing method...

Details Bimodal block copolymer, process for manufacturing method... Bimodal block copolymer, process for manufacturing method...

2005-03-15

2005-03-15

Seidleck, James J. (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S098000, C525S316000

Reexamination Certificate

active

06867259

ABSTRACT:
The present invention relates to a bimodal linear block copolymer containing a tapered block and its manufacturing method. The bimodal linear block copolymer includes a hexa-block copolymer of vinyl aromatic block(PS1)-conjugated diene block(PB1)-tapered block(T1)-vinyl aromatic block(PS2-PS3)-conjugated diene block(PB2)-vinyl aromatic block (PS4) as prepared by adding two charges of an initiator, and a tri-block copolymer of vinyl aromatic block(PS3)-conjugated diene block(PB2)-vinyl aromatic block (PS4). The bimodal linear block copolymer is prepared by adding more than one charge of the initiator, vinyl aromatic monomers and conjugated diene monomers to acquire transparency, toughness, rigidity and flexibility, and thereby can be used for sheets or films, or injection or blow molding products.

REFERENCES:
patent: 5227419 (1993-07-01), Moczygemba et al.
patent: 242614 (1987-10-01), None
patent: 1436812 (1976-05-01), None
U.S. Appl. No. 10/379,985, filed Mar. 2003, Kim et al.

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