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US 2008/0287571 A1Published application
Curable and cured wood particle composites and method making same
AssigneeRohm and Haas Company
InventorsEric Gustave Lundquist, Allen Philip Marks
Life of this patent
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Abstract
Curable wood particle composites curable by the Michael addition reaction in the presence of weak base catalyst are disclosed, along with a method for making those curable wood particle composites. Cured wood particle composites are also disclosed, along with a method of making those cured wood particle composites.
Claims9
A method comprising the steps of:
- (a) providing at least one population of plural untreated wood particles;
- (b) providing at least one Michael functional component;
- (c) contacting a population of the plural untreated wood particles with a Michael functional component to form plural Michael reactive wood particles;
- (d) blending any remaining plural untreated wood particles and any of the plural Michael reactive wood particles to form a reactive wood particle blend;
- and
- (e) shaping the reactive wood particle blend to form a curable wood particle composite,
- wherein:
- the step of contacting occurs:
- before the step of blending;
- during the step of blending;
- or both before and during the step of blending;
- each Michael functional component comprises at least one Michael ingredient selected from:
- (i) a multi-functional Michael donor;
- (ii) a multi-functional Michael acceptor;
- and
- (iii) a weak base catalyst having a conjugate acid which has a pKa of at least 3 and no more than 12.5;
- and
- the Michael functional components, taken together, comprise:
- at least one of the multi-functional Michael donor;
- at least one of the multi-functional Michael acceptor;
- and
- at least one of the weak base catalyst.
19 more elements
A curable wood particle composite comprising:
- (a) at least one population of plural Michael reactive wood particles;
- and
- (b) at least one Michael functional component,
- wherein:
- each Michael functional component comprises at least one Michael ingredient selected from:
- (i) a multi-functional Michael donor;
- (ii) a multi-functional Michael acceptor;
- and
- (iii) a weak base catalyst having a conjugate acid which has a pKa of at least 3 and no more than 12.5;
- and
- the Michael functional components, taken together, comprise:
- at least one of the multi-functional Michael donor;
- at least one of the multi-functional Michael acceptor;
- and
- at least one of the weak base catalyst.
12 more elements
A cured wood particle composite comprising:
- (a) at least one population of plural wood particles;
- and
- (b) a Michael polymer comprising plural Michael linkages, wherein the Michael linkages are formed by the reaction of a multi-functional Michael donor with a multi-functional Michael acceptor.
Dependencies are inferred from the claim text.