Modified poly(1-butene)resins composition

Abstract

A poly(1-butene) resin composition having and exhibiting excellent mechanical strength, rigidity, creep resistance and chloride water resistance is disclosed. The poly(1-butene) resin composition is particularly suitable as a material for joints pV in hot water pipes. The poly(l -butene) resin composition comprises of from about 60 to 95 weight parts of a poly(l-butene) resins (A), from about 5 to 40 weight parts of glass fiber (B) and a modified propylenic resin (C) present in an amount of from about 0.1 to 10 weight parts based on the combined weight parts of (A) and (B).

What is claimed is: 
     
       1. A poly(1-butene) resin composition comprising from about 60 to 95 weight parts of a poly(1-butene) resins (A), from about 5 to 40 weight parts of glass fiber (B) and a modified propylenic resin (C) present in an amount of from about 0.1 to 10 weight parts based on the combined weight parts of (A) and (B). 
     
     
       2. A composition as in claim 1 wherein said poly(1-butene) resin (A) is a homopolymer of 1-butene. 
     
     
       3. A composition as in claim 1 wherein said poly(1-butene) resin (A) is a copolymer of 1-butene and an α-olefin having 2 to 20 carbon atoms. 
     
     
       4. A composition as in claim 3 wherein said α-olefin is present in an amount of about 20 mole %. 
     
     
       5. A composition as in claim 3 wherein said α-olefin is present in an amount of about 10 mole %. 
     
     
       6. A composition as in claim 1 wherein said poly(1-butene) resin (A) has a ratio of its weight average molecular weight (Mw) to its number average molecular weight (Mn) in the range of from 2 to 15. 
     
     
       7. A composition as in claim 1 wherein said glass fiber (B) is chopped glass fiber having a diameter in the range of from 6 to 15 μm. 
     
     
       8. A composition as in claim 1 wherein the ratio of (A):(B) is from 65:35 to 80:20. 
     
     
       9. A composition as in claim 1 wherein said modified propylenic resin (C) is a homopolymer of propylene. 
     
     
       10. A composition as in claim 1 wherein said modified propylenic resin (C) is a block copolymer of propylene with about 50 mole % of at least one α-olefin having 2 to 20 carbon atoms. 
     
     
       11. A composition as in claim 1 wherein said modified propylenic resin (C) is a random copolymer of crystalline propylene with about 10 mole % of at least one α-olefin having 2 to 20 carbon atoms. 
     
     
       12. A composition as in claim 1 further comprising an antioxidant(s). 
     
     
       13. A composition as in claim 12 wherein said antioxidant(s) is present in an amount within the range of from 0.1 to 21 weight parts. 
     
     
       14. A composition as in claim 12 further comprising at least one additive selected from the group consisting of a UV absorber, a fungicide, a rust inhibitor, a lubricant, a filler, a pigment, or a heat resistant stabilizer. 
     
     
       15. A composition as in claim 14 further comprising an olefinic elastomer. 
     
     
       16. A shaped article of manufacture produced from the composition of claim 15. 
     
     
       17. A shaped article of manufacture produced from the composition of claim 1.