Porous body and sound absorbing material
By optimizing the porous structure of cross-linked polymers of acrylic and styrene monomers, the problems of insufficient extensibility and poor sound absorption of porous structures were solved, thereby improving both flexibility and sound absorption performance.
CN116897173BActive Publication Date: 2026-06-02JSP CORP
Patent Information
- Authority / Receiving Office
- CN Β· China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JSP CORP
- Filing Date
- 2022-03-15
- Publication Date
- 2026-06-02
Smart Images
Figure CN116897173B_ABST
Abstract
A porous body (1) has a crosslinked polymer (11) of a polymerization product of an acrylic monomer and / or a styrene monomer as a base resin. The porous body (1) has a storage elastic modulus at 23Β°C of 5 kPa or more and 2000 kPa or less. The apparent density of the porous body (1) is 10 kg / m 3 or more and 250 kg / m 3 or less. The crosslinked polymer (11) has a glass transition temperature of -30Β°C or more. The crosslinked polymer (11) has a molecular weight between crosslinking points of 1.0 x 10 4 or more. The porous body (1) is obtained by polymerizing a monomer in a water-in-oil high internal phase emulsion in which an aqueous phase is enclosed in an organic phase at a high ratio.
Need to check novelty before this filing date? Find Prior Art