Thermally expandable formulations
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United States of America Patent
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May 2, 2017
Grant Date -
Sep 3, 2015
app pub date -
May 14, 2015
filing date -
Nov 20, 2012
priority date (Note) -
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Abstract
The present specification relates to thermally expandable formulations comprising (a) at least one peroxidically crosslinkable binary copolymer comprising at least one monomer unit selected from vinyl acetate, (meth)acrylic acids and derivatives thereof, the binary copolymer having a melt flow index of not more than 3 g/10 min, as determined in accordance with DIN EN ISO 1133 and with a test load of 2.16 kg and a test temperature of 190° C., (b) at least one peroxide, (c) at least one chemical blowing agent, and (d) at least one polymer based on one or more diene monomers, and (e) at least one terpolymer based on at least one first monomer selected from singly or multiply unsaturated hydrocarbons, and on at least one second monomer selected from (meth)acrylic acids and derivatives thereof. The thermally expandable formulations exhibit a high level of persistence during the heating of the material as required for curing/expansion.
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International Classification(s)
- C08J:WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTE....
- B29C:SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTAN....
- B60R:VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT ....
- C08L:COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- F16J:PISTONS; CYLINDERS; PRESSURE VESSELS IN GENERAL; S....
- C08K:USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUB....
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