Oriented gel and oriented gel articles

• US 5,962,572 A
• Filed: 12/29/1995
• Issued: 10/05/1999
• Est. Priority Date: 04/19/1994
• Status: Expired due to Fees

• Current Assignee: Applied Elastomerics Incorporated
• Original Assignee: Applied Elastomerics Incorporated
• Inventors: Chen, John Y.
• Primary Examiner(s): Lilling, Herbert J.
• Application Number:
  US08/581,125
• Time in Patent Office: 1,376 Days
• Field of Search: 524/474, 524/476, 524/484, 524/485, 524/486, 524/490, 524/491, 524/505, 524/95, 524/98, 524/99, 385/144, 446/385, 446/486
• US Class Current: 524/474
• CPC Class Codes: A63H 33/185 Aerial toy rotating automatically when descending under gravity
• 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

Abstract

Oriented gels aliened by controlled stretching during the gel'"'"'s transition from a heated, extremely viscous, non melting, non flowing state and the cooled solid gel state produces strong gels which are found to have greater tensile strength than gels of the same rigidity which have not been stretched to a selected degree during its heating and cooling histories. Gels which are selectively stretched during its (non melt flowing) heated state and rapidly cooled by flowing air, cold liquid bath or in contact with a cool surface exhibit optical birefringence when viewed under plane-polarized light.

Claims

1. A composition comprising:

an optically birefringent, oriented gel formed from (a) 100 parts by weight of one or more high viscosity linear, multi-arm, branched, or star shaped block copolymers;

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

said composition exhibits birefringence when view under crossed polarizers.

2. A composition of claim 1, wherein said gel is made from one or more block copolymers of the general configuration poly(styrene-ethylene-butylene-styrene), poly(styrene-ethylene-propylene-styrene), poly(styrene-ethylene-ethylene-propylene-styrene), poly(styrene-ethylene-propylene)n, poly(styrene-ethylene-butylene)n, or a mixture thereof and with or without a selected amount of at least one polymer or copolymer selected from the group consisting of poly(styrene-butadiene-styrene), poly(styrene-butadiene), poly(styrene-isoprene-styrene), poly(styrene-isoprene), poly(styrene-ethylene-propylene), low viscosity poly(styrene-ethylene-propylene-styrene), low viscosity poly(styrene-ethylene-butylene-styrene), poly(styrene-ethylene-butylene), polystyrene, polybutylene, poly(ethylene-propylene), poly(ethylene-butylene), polypropylene, or polyethylene, wherein said selected copolymer is a linear, branched, multiarm, or star shaped copolymer.

3. A composition of claim 1, wherein said composition is made from one or more block copolymers of poly(styrene-ethylene-butylene-styrene), poly(styrene-ethylene-propylene-styrene), poly(styrene-ethylene-ethylene-propylene-styrene), poly(styrene-butadiene-styrene), poly(styrene-isoprene-styrene), poly(styrene-ethylene-propylene)n, poly(styrene-ethylene-butylene)n, a hydrogenated styrene isoprene/butadiene block copolymer, a hydrogenated styrene block polymer with 2-methyl-1,3-butadiene and 1,3-butadiene in combination with or without a polymer or copolymer of polystyrene, polybutylene, polypropylene, or polyethylene, and said gel is characterized by a gel rigidity of from about 20 to about 800 gram Bloom.

4. A composition of claim 1, wherein said block copolymer is a hydrogenated styrene isoprene/butadiene block copolymer or a hydrogenated styrene block polymer with 2-methyl-1,3-butadiene and 1,3-butadiene.

5. A composition of claim 1, wherein said block copolymer is a hydrogenated styrene isoprene/butadiene block copolymer having a general configuration poly(styrene-ethylene-butylene/ethylene-propylene-styrene).

6. A composition of claim 1, wherein said block copolymer is a hydrogenated styrene block polymer with 2-methyl-1,3-butadiene and 1,3-butadiene having a general configuration poly(styrene-ethylene-ethylene-propylene-styrene).

7. A composition comprising:

an optically birefringent, oriented gel formed from (a) 100 parts by weight of one or more multiarm poly(styrene-ethylene-butylene)n, poly(styrene-ethylene-propylene)n block copolymer or a mixture thereof, n being a number 2 or greater;

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

said composition exhibits birefringence when view under crossed polarizers.

8. A composition comprising:

an optically birefringent, oriented gel formed from (a) 100 parts by weight of a linear poly(styrene-ethylene-ethylene-propylene-styrene) block copolymer;

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

said composition exhibits birefringence when view under crossed polarizers.