Diblock and triblock polydiorganosiloxane-polyurea block copolym

Details Diblock and triblock polydiorganosiloxane-polyurea block copolym Diblock and triblock polydiorganosiloxane-polyurea block copolym

1997-05-22

1998-08-11

Nakarani, D. S.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Adhesive outermost layer

428354, 428422, 428447, 428448, 428451, 428452, B32B 712

Patent

active

057925542

ABSTRACT:
Diblock (B-A) and triblock (B-A-B) polydiorganosiloxane-polyurea block copolymers comprise non-functional polydiorganosiloxane endblock B and polyurea block A. When used to provide release coatings, the block copolymers allow for easier release compared to traditional block copolymers of the (AB).sub.n type having comparable amounts of polydiorganosiloxane. Articles incorporating the copolymers as a release material are also disclosed.

REFERENCES:
patent: 3562352 (1971-02-01), Nyilas
patent: 4518758 (1985-05-01), Cavezzan et al.
patent: 4528343 (1985-07-01), Kira
patent: 4968750 (1990-11-01), Eichenauer et al.
patent: 4999412 (1991-03-01), Neale et al.
patent: 5035934 (1991-07-01), Tomiyama et al.
patent: 5089336 (1992-02-01), Kumar et al.
patent: 5091483 (1992-02-01), Mazurek et al.
patent: 5183874 (1993-02-01), Veith
patent: 5214119 (1993-05-01), Leir et al.
patent: 5290615 (1994-03-01), Tushaus et al.
Yilgor et al., "Segmented organosiloxane copolymers. 1. Synthesis of siloxane-urea coploymers", Polymer, vol. 25, Dec. 1984, pp. 1800-1806.
Tyagi et al., "Segmented organosiloxane copolymers. 2. Thermal and mechanical properties of siloxane-urea copolymers", Polymer, vol. 25, Dec. 1984, pp. 1807-1816.
Pietrasanta et al., "Synthesis of ABA Block Co-Oligomers of Polymethylmethacrylate and Poly(Dimethylsiloxane)", Polymer Bulletin 15, pp. 107-112 (1986).
Yilgor et al., "Novel Triblock Siloxane Copolymers: Synthesis, Characterization, and Their Use as Surface Modifying Additives", Jouranl of Polymer Science, vol. 27, 3673-3690 (1989).
Clouet et al., "Macrothiuram Disulfide for the Free Radical Synthesis of PDMS-Vinyl Triblock Copolymers. I. Syntheses and Polymerization Kinetics", Journal of Polymer Science, vol. 31, 3387-3396 (1993).

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