Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1980-05-07
1983-05-31
Briggs, Sr., Wilbert J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524505, 524574, 524575, 604 96, C08L 2510, C08L 906
Patent
active
043861792
ABSTRACT:
A composition of matter composed of a thermoplastic elastomeric hydrocarbon block copolymer having 0.1 to 8 percent polysiloxane, or silicone oil, uniformly distributed throughout. The composition exhibits improved surface, elasticity, and tensile strength characteristics as well as superior processibility. The block copolymer may take the form of styrene-ethylene-butylene-styrene in which the styrene blocks have a molecular weight of 5,000 to 40,000 and the ethylene-butylene block has a molecular weight of 20,000 to 500,000. Uniformly dispersed mineral oil may constitute 10 to 60 percent of the composition's total weight which may also include less than 45 percent polypropylene. Combining the copolymer with the silicone oil occurs under the influence of a pressure of 1,500 to 2,500 p.s.i. such as provided by extrusion blending. The resulting elastomeric composition may extrude in sheets as thin as 0.015, 0.010 or even 0.005 inch, which a puller may thin even further. The resulting composition has a surface smoothness microscopically characteristic of silicone rubber. As one of its many varied uses, the elastomer may find use as an inflatable cuff or balloon on such medical devices as endotracheal tubes. The high elasticity of the composition permits it to act, when in the trachea, as a high residual volume type endotracheal tube, except that it avoids the folds which permit aspiration fluids to channel to the patient's lungs. The pressure it exerts against the tracheal wall falls even below the high volume device. When not inflated, the material returns to a sufficiently small volume that it acts as a low volume device for ease of insertion and withdrawal.
REFERENCES:
patent: 2655489 (1953-10-01), Lawson
patent: 2888419 (1959-05-01), Safford
patent: 2992201 (1961-07-01), Gober
patent: 3239478 (1966-03-01), Harlan
patent: 3272766 (1966-09-01), Gowman
patent: 3441530 (1969-04-01), Bauer et al.
patent: 3445420 (1969-05-01), Kookootsedes et al.
patent: 3459831 (1969-08-01), Liftglass et al.
patent: 3485787 (1969-12-01), Haefele et al.
patent: 3566874 (1971-03-01), Shepherd et al.
patent: 3576913 (1971-04-01), Johnson et al.
patent: 3578481 (1971-05-01), Young
patent: 3640282 (1972-02-01), Kamen et al.
patent: 3686356 (1972-08-01), Saam
patent: 3766295 (1973-10-01), Crossland et al.
patent: 3795646 (1974-03-01), MacKenzie et al.
patent: 3798185 (1974-03-01), Skiens et al.
patent: 3817248 (1974-06-01), Buckles et al.
patent: 3830767 (1974-08-01), Condon
patent: 3865766 (1975-02-01), Merrill
patent: 3896815 (1975-07-01), Fettel et al.
patent: 3919157 (1975-11-01), Ide et al.
patent: 4003382 (1977-01-01), Dyke
patent: 4006116 (1977-02-01), Dominguez
patent: 4039629 (1977-08-01), Himes et al.
patent: 4041103 (1977-08-01), Davison et al.
patent: 4049595 (1977-09-01), Dominguez
patent: 4093484 (1978-06-01), Harrison et al.
patent: 4108825 (1978-08-01), Hayes
patent: 4123409 (1978-10-01), Kaelble
patent: 4143651 (1979-03-01), Patel
patent: 4147169 (1979-04-01), Taylor
patent: 4157094 (1979-06-01), Patel
patent: 4196731 (1980-04-01), Laurin et al.
patent: 4198983 (1980-04-01), Becker et al.
patent: 4242287 (1980-12-01), Allen
patent: 4292222 (1981-09-01), Grigo et al.
W. Wu, et al., Critical Care Medicine, 1, 197, (1973).
U. Nordin, Acta Otorlaryngol Suppl., 345, 7, (1975).
W. N. Berhard, et al., Anesthesiology, 48, 413, (1978).
Briggs Sr. Wilbert J.
Medical Research Associates, Ltd.
LandOfFree
Hydrocarbon block copolymer with dispersed polysiloxane does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydrocarbon block copolymer with dispersed polysiloxane, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrocarbon block copolymer with dispersed polysiloxane will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2246339