Polyurethanes and polyurethane/polyureas crosslinked using 2-glyceryl acrylate or 2-glyceryl methacrylate
First Claim
1. A crosslinkable polyurethane or polyurethane/polyurea comprising the reaction product of a composition comprising a macrodiol having a number average molecular weight of at least 400 or macrodiamine having a number average molecular weight of at least 400, 2-glyceryl acrylate or 2-glyceryl methacrylate, and a diisocyanate.
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Abstract
A crosslinkable polyurethane or polyurethane/polyurea comprises the reaction product of a composition comprising a macrodiol or macrodiamine, 2-gl;yceryl acrylate or 2-glyceryl methacrylate, a diisocyanate, and optionally a small glycol or small diamine as chain extender. The performance properties of the polyurethanes and polyurethane/polyureas can be controlled by adjustment of the crosslink level and/or curing parameters.
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Citations
30 Claims
- 1. A crosslinkable polyurethane or polyurethane/polyurea comprising the reaction product of a composition comprising a macrodiol having a number average molecular weight of at least 400 or macrodiamine having a number average molecular weight of at least 400, 2-glyceryl acrylate or 2-glyceryl methacrylate, and a diisocyanate.
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11. A crosslinkable polyurethane or polyurethane/polyurea having randomly disposed units of the formula ##STR9## wherein:
- X is --NH-- or --O--,
R1 is a polyether, a polyester, or a polydimethylsiloxane segment, R2 and R4 independently are selected from the class consisting of alkylene, cycloalkylene, and arylene groups and combinations thereof R3 is H or CH3, and A, B, D=total number of OH and NH equivalents and the total molecular weight of the A, B, and D units is in the range of 10,000 to 400,000.
- X is --NH-- or --O--,
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12. A method comprising the step of
(a) reacting a macrodiol having a number average molecular weight of at least 400 or macrodiamine having a number average molecular weight of at least 400, a diisocyanate, and 2-glyceryl acrylate or 2-glyceryl methacrylate to provide a crosslinkable polyurethane or polyurethane/polyurea.
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16. A method for adjusting the crosslinking of polyurethanes or polyurethane/polyureas comprising the steps of:
(a) providing a crosslinkable polyurethane or polyurethane/polyurea having chain extender units of the formula ##STR10## wherein R is hydrogen or methyl, and (b) crosslinking said polyurethane via at least one of thermal energy, ultraviolet radiation, gamma radiation or electron beam radiation.
Specification