Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
MILLABLE SILICONE RUBBER COMPOSITION, MILLABLE SILICONE RUBBER SPONGE, AND METHOD FOR PRODUCING SAID SPONGE
Provided are a millable silicone rubber composition; a millable silicone rubber sponge; and a method for producing this sponge. The method is a method for producing a millable silicone rubber sponge with an open cell ratio of not lower than 20%, comprising: performing a heat treatment on a silicone rubber composition at 200°C or higher, the silicone rubber composition containing: (A) an organopolysiloxane having at least two alkenyl groups in one molecule and a polymerization degree of not lower than 3,000, the organopolysiloxane being represented by the following average composition formula (I) R 1 a SiO 4-a/2 (I) wherein R 1 represents an identical or different monovalent hydrocarbon group, and a represents a positive number of 1.95 to 2.04; (B) a reinforcing silica; (C) thermally expandable microcapsules exhibiting an expansion starting temperature of 90 to 150°C, and contracting from a maximum expansion volume by 20% or more when heated at 200°C for 5 min; (D) a curing agent which is an organic peroxide; and (E) an open cell-forming agent which is a solid high temperature decomposition-type organic foaming agent having a decomposition starting temperature of not lower than 180°C, and starting to decompose after the component (A) is cured.
MILLABLE SILICONE RUBBER COMPOSITION, MILLABLE SILICONE RUBBER SPONGE, AND METHOD FOR PRODUCING SAID SPONGE
Provided are a millable silicone rubber composition; a millable silicone rubber sponge; and a method for producing this sponge. The method is a method for producing a millable silicone rubber sponge with an open cell ratio of not lower than 20%, comprising: performing a heat treatment on a silicone rubber composition at 200°C or higher, the silicone rubber composition containing: (A) an organopolysiloxane having at least two alkenyl groups in one molecule and a polymerization degree of not lower than 3,000, the organopolysiloxane being represented by the following average composition formula (I) R 1 a SiO 4-a/2 (I) wherein R 1 represents an identical or different monovalent hydrocarbon group, and a represents a positive number of 1.95 to 2.04; (B) a reinforcing silica; (C) thermally expandable microcapsules exhibiting an expansion starting temperature of 90 to 150°C, and contracting from a maximum expansion volume by 20% or more when heated at 200°C for 5 min; (D) a curing agent which is an organic peroxide; and (E) an open cell-forming agent which is a solid high temperature decomposition-type organic foaming agent having a decomposition starting temperature of not lower than 180°C, and starting to decompose after the component (A) is cured.
MILLABLE SILICONE RUBBER COMPOSITION, MILLABLE SILICONE RUBBER SPONGE, AND METHOD FOR PRODUCING SAID SPONGE
HIRABAYASHI SATAO (Autor:in)
05.11.2020
Patent
Elektronische Ressource
Englisch
IPC:
C08J
Verarbeitung
,
WORKING-UP
/
B29C
Formen oder Verbinden von Kunststoffen
,
SHAPING OR JOINING OF PLASTICS
/
C08K
Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe
,
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
/
E06B
Feste oder bewegliche Abschlüsse für Öffnungen in Bauwerken, Fahrzeugen, Zäunen oder ähnlichen Einfriedungen allgemein, z.B. Türen, Fenster, Läden, Tore
,
FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES, OR LIKE ENCLOSURES, IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
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