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Title:
POLYMER BLEND, COMPOSITION, SEALANT, AND SEALANT FOR TIRE
Document Type and Number:
WIPO Patent Application WO/2020/179644
Kind Code:
A1
Abstract:
Provided are: a polymer blend which includes an organic polymer having a reactive silicon-containing group and which can give cured objects excellent in terms of elongation property and stress relaxation; a composition comprising the polymer blend, a specific filler, and a curing catalyst; a sealant comprising the composition; and a sealant for tires. A polymer blend which includes an organic polymer having a bifunctional reactive silicone-containing group of a specific structure is mixed with given proportions of a polyoxyalkylene (A) which has a number-average molecular weight of 13,000-100,000, has a reactive-silicone-containing-group equivalent Eqa of 0.010-0.29 mmol/g, and contains more than one silicon-containing group per molecule and a polyoxyalkylene (B) which has a number-average molecular weight of 3,000-25,000, has a reactive-silicon-containing group only at one end, and has a reactive-silicon-containing-group equivalent Eqb of 0.03-0.58 mmol/g.

Inventors:
MIYAFUJI KIYOSHI (JP)
NAKASHIMA TOHRU (JP)
NISHIURA FUMITERU (JP)
Application Number:
JP2020/008192
Publication Date:
September 10, 2020
Filing Date:
February 27, 2020
Export Citation:
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Assignee:
KANEKA CORP (JP)
BRIDGESTONE CORP (JP)
International Classes:
C08L71/00; B60C1/00; B60C19/12; C08K3/04; C08K3/26; C08K3/36; C09K3/10
Domestic Patent References:
WO2012020560A12012-02-16
WO2012057092A12012-05-03
WO2014192914A12014-12-04
Foreign References:
JP2017155225A2017-09-07
JP2010150381A2010-07-08
JP2005336401A2005-12-08
JP2017214541A2017-12-07
Attorney, Agent or Firm:
NIIYAMA Yuichi et al. (JP)
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