Processing isoolefin polymers

Details Processing isoolefin polymers Processing isoolefin polymers

C - Chemistry, Metallurgy

08

L

400/1121, 402/45

C08L 23/22 (2006.01) C08F 10/10 (2006.01) C08L 9/00 (2006.01) C08L 23/28 (2006.01)

Patent

CA 1330144

ABSTRACT OF THE DISCLOSURE A substantially gel free C4 to C7 isoolefin homopolymer rubber, butyl copolymer rubber, halogenated butyl rubber (e g , chlorinated or brominated), or mixtures thereof, comprising a molecular weight distribution such that the ratio of the moments of said molecular weight distribution, Mz/Mw, is equal to or exceeds 2.0, and that portion of said molecular weight distribution which is equal to and greater than 4 times the peak molecular weight, Mp, comprises greater than 8 percent of the total polymer species, and Mp is greater than about 250,000 and wherein said polymer species of molecular weight less than Mp are substantially branch free. Various means are disclosed for effecting the molecular weight distribution including blending of homopolymers and/or copolymers of appropriate molecular weight and molecular weight distribution and direct polymerization using a functional reagent to introduce branching. The rubber compositions are particularly useful in applications in which butyl or halogenated butyl rubber is used and where it is desired to obtain high green strength in combination with an increased rate of stress relaxation. Such polymers are particularly well suited for use in tire innerliner compositions.

585501

Affiliated with

Also associated with

Rating

Processing isoolefin polymers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Processing isoolefin polymers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Processing isoolefin polymers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1252719