Title:
METHOD FOR PRODUCING LOW SPECIFIC GRAVITY MOLDED FOAM BY USING PROPYLENE-BASED POLYMER
Document Type and Number:
WIPO Patent Application WO/2019/160293
Kind Code:
A1
Abstract:
Provided is a method for producing a low specific gravity molded foam by using a propylene-based polymer, comprising the steps of: providing a foamable composition comprising a mixture of a propylene-based polymer and thermally expansive microspheres; introducing the foamable composition into a mold for producing a molded foam; expanding the foamable composition in the mold by raising the temperature of the foamable composition to at least the expansion start temperature (Tstart) of the thermally expandable microspheres; forming a molded foam in a state that the foamable composition is expanded and filled with the mold; and demolding the molded foam from the mold.
Inventors:
LEE SUNG YULL (KR)
Application Number:
PCT/KR2019/001670
Publication Date:
August 22, 2019
Filing Date:
February 12, 2019
Export Citation:
Assignee:
FINE CHEMICAL CO LTD (KR)
International Classes:
B29C44/34; B29K23/00; B29K105/04
Foreign References:
| JP2017071088A | 2017-04-13 | |||
| KR20100016148A | 2010-02-12 | |||
| KR20090079246A | 2009-07-21 | |||
| JP2011256479A | 2011-12-22 | |||
| KR20160117581A | 2016-10-10 |
Other References:
See also references of EP 3683030A4
Attorney, Agent or Firm:
KWAK, Hyun Kyu (KR)
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