USH1583HExpiredUtilityPatentIndex 72

Elastomeric polybutylene polymer

Assignee: SHELL OIL COPriority: Jun 1, 1993Filed: Jun 1, 1993Granted: Aug 6, 1996

Est. expiryJun 1, 2013(expired)· nominal 20-yr term from priority

Inventors:HWO CHARLES C WILPERS DALE J

C08L 23/20

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Claims

Abstract

It is herein disclosed a novel elastomeric polybutylene-1 having and exhibiting syndiotacticity of greater than ten percent, and possessing other desirable properties. The novel elastomeric polybutylene-1 can be blended with compatible materials such as polypropylene and its copolymers, ethylene-propylene block copolymers, butyl rubbers and polyisobutylene. Such compositions are particularly suitable in films, hot melt adhesives, textile and fiber applications. The novel elastomeric polybutylene-1 can also be blended with incompatible materials such as ethylenically unsaturated esters (EVA, EMA, EMAA, EEA), polyester, nylon, polystyrene, styrene block copolymers (SEBS, SIS, SBS) and polyethylenes into a composition having soft and improved elastic properties. Such blends are particularly useful in easy-open packaging and foam applications, and in PVC replacement. When oriented, films made of such blends are used as soft and elastic shrink films. The novel elastomeric polybutylene-1 can also be blended with both incompatible and compatible materials.

Claims

exact text as granted — not AI-modified

What is claimed is: 
     
       1. A polymer composition consisting essentially of elastomeric polybutylene-1 (ELPB) wherein said elastomeric polybutene-1 has and exhibits syndiotacticity of greater than ten percent. 
     
     
       2. A composition as in claim 1 wherein said ELPB is further characterized by the following properties: % Isotacticity: less than 70   Isotactic Block Length: less than 20 units   Melting points, °C.: 1st heat: &lt;105; 2nd heat: 101   Tensile Strength at Break, psi: &lt;3,000   Tensile Yield Strength&lt;psi: No yield point   Tensile Set, %: &lt;170.   
     
     
       3. An article of manufacture made from the composition of claim 1. 
     
     
       4. An article of manufacture made from the composition of claim 2. 
     
     
       5. A polymer blend consisting essentially of: (i) an elastomeric polybutene-1 (ELPB), and   (ii) a material selected from a group consisting of polypropylene hompolymer; polypropylene copolymer; ethylene-propylene block copolymer; butyl rubber; polyisobutylene; a polymer of ethylenically unsaturated ester(s) selected from the group consisting of EVA, EMA, EMAA, EEA and mixture thereof; polyester; nylon; polystyrene; styrene block copolymer(s) selected from the group consisting of SEBS, SIS, SBS and a mixture thereof; polyethylene; and a mixture thereof and a mixture thereof;   wherein said elastomeric polybutene-1 (ELPB) has and exhibits syndiotacticity of greater than ten percent, wherein said ELPB is characterized by the following properties:   % Isotacticity: less than 70   Isotactic Block Length: less than 20 units   Crystallinity: &lt;25   Melting points, °C.: 1st heat: &lt;105; 2nd heat:&lt;101   Tensile Strength at Break, psi: &lt;3,000   Tensile Yield Strength, psi: No yield point   Tensile Set, %: &lt;170.   
     
     
       6. A polymer blend consisting essentially of: (i) an elastomeric polybutene-1 (ELPB);   (ii) a material selected from a group consisting of polypropylene hompolymer, polypropylene copolymer, ethylene-propylene block copolymer, butyl rubber, polyisobutylene, and a mixture thereof; and   (iii) a material selected from a group consisting of polymer of ethylenically unsaturated ester(s) selected from the group consisting of EVA, EMA, EMAA, EEA and a mixture thereof;-polyester; nylon; polystyrene; styrene block copolymer(s) selected from the group consisting of SEBS, SIS, SBS and mixture thereof; polyethylene; and a mixture thereof;   wherein said elastomeric polybutene-1 has and exhibits syndiotacticity of greater than ten percent, wherein said ELPB is characterized by the following properties:   % Isotacticity: less than 70   Isotactic Block Length: less than 20 units   Crystall inity: &lt;25%   Melting points, °C.: 1st heat: &lt;105; 2nd heat:&lt;101   Tensile Strength at Break, psi: &lt;3,000   Tensile Yield Strength, psi: No yield point   Tensile Set, %: &lt;170.

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