Gelatinous elastomer articles

• US 5,336,708 A
• Filed: 08/24/1992
• Issued: 08/09/1994
• Est. Priority Date: 03/17/1977
• Status: Expired due to Term

• Current Assignee: Applied Elastomerics Incorporated
• Original Assignee: Applied Elastomerics Incorporated
• Inventors: Chen, John Y.
• Primary Examiner(s): Lilling, Herbert J.
• Application Number:
  US07/935,540
• Time in Patent Office: 715 Days
• Field of Search: 524/476, 524/505, 524/523, 524/490, 524/474, 427/162, 428/521, 15/104.002, 525/95, 521/148, 602/904, 2/411, 132/321, 297/391, 297/392, 297/394, 297/397, 297/411, 297/423, 297/463, 297/DIG. 1, 297/DIG. 6, 5/632, 5/636, 5/640, 135/68, 135/71-72, 135/82
• US Class Current: 524/474
• CPC Class Codes: A61C 15/041 Dental floss chemical aspects A61Q11/00
• CPC Class Codes: C08K 5/01 Hydrocarbons C08K5/0091 takes precedence
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/24 Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
• CPC Class Codes: C08L 51/00 Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds for ABS polymers C08L55/02; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 53/00 Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 53/02 of vinyl-aromatic monomers and conjugated dienes
• CPC Class Codes: C08L 53/025 modified
• CPC Class Codes: C08L 91/00 Compositions of oils, fats or waxes; Compositions of derivatives thereof
• CPC Class Codes: Y10S 297/01 Foam
• CPC Class Codes: Y10S 297/04 Wheelchair
• CPC Class Codes: Y10S 5/909 Flowable viscous, e.g. gel material containing

Abstract

Novel composites are formed from a low rigidity gelatinous elastomer composition of poly(styrene-ethylene-butylene-styrene) triblock copolymer and high levels of a plasticizing oil. The gelatinous elastomer composition is physically interlocked with an open cell sponge thereby displacing the air space within the sponge and the gel rigidity is found to be greater than about the sum of the combined rigidity of the gelatinous elastomer composition and sponge alone. The gelatinous elastomer composite exhibits a novel combination of properties including unexpectedly high elongation and tensile strength and excellent shape retention after extreme deformation under high-velocity impact and stress conditions. The gelatinous elastomer composites can be made firm or soft and flexible. These and other properties are particularly essential for the gelatinous elastomer composites to have utility as toys, therapeutic hand exercising grips, shock absorbers, acoustical isolators, vibration dampers, vibration isolators, wrappers, hand exercisers, crutch cushions, cervical pillows, bed wedge pillows, leg rest cushions, neck cushions, bed pads, elbow pads, dermal pads, wheelchair cushions, helmet liners, hot or cold compress pads, exercise weight belts, swabs, traction pads, splints, slings, rib supports, orthopedic shoe soles, brice cushions for the hand, wrist, finger, forearm, knee, leg, clavicle, shoulder, foot, ankle, neck, back, and the like.

Claims

1. A composite article comprising a thermoplastic, heat formable and heat reversible gelatinous elastomer composition, G, which is physically interlocked with a selected material M_n, said gelatinous elastomer composition formed from (a) 100 parts by weight of a high viscosity triblock copolymer of the general configuration poly(styrene-ethylene-butylene-styrene);

(b) from about 300 to about 1,600 parts by weight of a plasticizing oil;

said composition characterized by a gel rigidity of from about 20 to about 800 gram Bloom;

said composite formed from the combination G_n M_n G_n, M_n G_n M_n, M_n G_n G_n, G_n G_n M_n, M_n G_n G_n M_n, G_n M_n G_n G_n, G_n M_n M_n G_n, G_n M_n M_n G_n, G_n G_n M_n M_n, G_n G_n M_n G_n M_n, G_n M_n G_n G_n, G_n G_n M_n, G_n M.sub. n G_n M_n M_n, M_n G_n M_n G_n M_n G_n, G_n G_n M_n M_n G_n, or G_n G_n M_n G_n M_n G_n, wherein when n is a subscript of M, n is the same or different selected from the group consisting of foam, plastic, fabric, metal, concrete, wood, glass, ceramics, synthetic resin, synthetic fibers or refractory materials;

wherein when n is a subscript of G, n denotes the same or a different gel rigidity.

2. A composite article of claim 1, wherein said styrene end block to ethylene and butylene center block ratio is from about 20:

80 to about 40;

60.

3. A composite article of claim 1, wherein said styrene end block to ethylene and butylene center block ratio is from about 31:

69 to about 40;

60.

4. A composite article of claim 1, wherein said article is a vibration damper, a vibration isolator, a wrapper, a hand exerciser, a dental floss, a crutch cushion, a cervical pillow, a bed wedge pillow, a leg rest cushion, a neck cushion, a mattress, a bed pad, an elbow pad, a dermal pad, a wheelchair cushion, a helmet liner, a hot or cold compress pad, an exercise weight belt, or a traction pad.

5. A composite article of claim 1, wherein said article is a splint, sling, or brace cushion for the hand, wrist, finger, forearm, knee, leg, clavicle, shoulder, foot, ankle, neck, back, and rib or an orthopedic shoe sole.

6. A composite article formed from the composition of claim 1, wherein said triblock copolymer is characterized by a Brookfield Viscosity of a 20 weight percent solids solution in toluene at 25°

C. of substantially greater than 1,800 cps.