Foam gasket and bonding tape based on polyurethane dispersions
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United States of America Patent
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Jan 30, 2018
Issued Date -
N/A
app pub date -
Aug 3, 2017
filing date -
Jun 13, 2013
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Abstract
A polymer sheet includes a polyurethane core. The polyurethane core has a first major surface and a second major surface opposite the first major surface. The polymer sheet can have at least one functional layer overlying a major surface. The polymer sheet has a thickness tps. The polyurethane core has a thickness tpc. In embodiments tpc can be at least 0.3 tps. The polyurethane core can have at least one of the following property: (i) a Scratch Resistance Rating, as further described herein, of not greater than about 10 wt %, (ii) an elongation at break of at least 200%, (iii) a tensile strength at break of at least 0.3 MPa, (iv) a loss of tensile strength of not greater than about 30% when exposed to UV light according to standard SAE J1960 (Rev. August 2003). The polymer sheet can be used for gaskets or bonding tapes.
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