Elastomer composition for medical container stopper

Elastomer composition for medical container stopper

  • CN 102,256,584 A
  • Filed: 03/04/2010
  • Published: 11/23/2011
  • Est. Priority Date: 03/13/2009
  • Status: Active Application
First Claim
Patent Images

1. medical container stopper elastomer composition, it is characterized in that it is an elastomer composition, it contains block copolymer A, the block copolymer P that 5~

  • 50 quality are divided that 50~

    95 quality are divided, the total amount of above-mentioned block copolymer A and above-mentioned block copolymer P is 100 quality branchesThe kinetic viscosity in 40 ℃

    of dividing with 100~

    300 quality is the softening agent B of 50~

    500cSt,The crooked elastic rate that divides with 1~

    50 quality is the acrylic polymers C of 1000~

    3000Mpa;

    Above-mentioned block copolymer A;

    Contain the divinylic monomer unit as main composition unit, and have in 1 this butadiene 1, the bonded ratio of 2-is 10~

    50% polymer blocks Y1;

    It is the hydride of block copolymer Z1, has two ends at above-mentioned polymer blocks Y1 and contains each 1 the polymer blocks X1 as the styrene monomer unit of main composition unit that adds up to 2;

    It is that weight average molecular weight is 16~

    400,000, styrene monomer unit to contain proportional be the block copolymer of 20~

    50 quality %;

    Above-mentioned block copolymer P;

    It is the hydride of block copolymer Z2, has 1 butadiene-styrene control distribution copolymer block Y2, and has each 1 polystyrene block X2 that adds up to 2 at two ends of above-mentioned copolymer block Y2,It is that weight average molecular weight is 16~

    400,000, styrene monomer unit to contain proportional be the block copolymer of 40~

    70 quality %,Above-mentioned butadiene-styrene control distribution copolymer block Y2 has the regional YB2 that contains more than 2 as the divinylic monomer unit of main composition unit,And have 1 regional YS2 that contains as the styrene monomer unit of main composition unit,It is the BS block, and two ends are above-mentioned zone YB2 section.

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