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US 8,802,746 B2Granted
Isocyanate-based foam having improved anti-yellowing properties and process for production thereof
AssigneeProprietect L.P.
InventorsWen Wei Zhao, Mladen Vidakovic, Eugene Smeianu
Life of this patent
Estimating the term…
Abstract
There is described an isocyanate-based polymer foam having improved anti-yellowing properties. The foam produced from a formulation comprising an isocyanate, a blowing agent, a first active hydrogen-containing compound and a second active hydrogen-containing compound different than the first active hydrogen-containing compound. The second active hydrogen-containing compound comprises an active hydrogen-containing phosphite compound. A process for producing such a foam is also described.
Claims29
A flexible isocyanate-based polymer foam produced from a formulation comprising:
- an isocyanate;
- a blowing agent consisting essentially of water;
- a first active hydrogen-containing compound;
- and
- a second active hydrogen-containing compound different than the first active hydrogen-containing compound and excluding tris(dipropyleneglycol) phosphite, the second active hydrogen-containing compound consisting essentially of an anti-yellowing amount of an active hydrogen-containing phosphite compound having the following formula
- wherein:
- R1, R2 and R3 may be the same or different and each is selected from the group comprising a C1-C40 aliphatic group optionally containing one or more heteroatoms, C5-C40 aromatic group optionally containing one or more heteroatoms and a C5-C50 araliphatic group optionally containing one or more heteroatoms;
- X1, X2 and X3 may be the same or different and each is selected from the group comprising hydroxyl, amino, carboxy, thiol and amido;
- and
- n is an integer in the range of from 1 to 10, and wherein the second active hydrogen-containing compound is present in the formulation in an amount in the range from of about 0.5 to about 3.0 parts by weight per 100 parts by weight of the first active hydrogen-containing compound, wherein, for a period of 48 hours after production, the foam has a B* value of up to about 90 percent of the B* value of a control foam produced from a control formulation identical to the formulation with the proviso that the control formulation is free of the second active hydrogen-containing compound.
7 more elements
A process for producing a flexible foamed isocyanate-based polymer comprising the steps of:
- contacting (i) an isocyanate, (ii) a blowing agent consisting essentially of water, (iii) a first active hydrogen-containing compound, (iv) a second active hydrogen-containing compound different than the first active hydrogen-containing compound and excluding tris(dipropyleneglycol) phosphite, and (v) a blowing agent to form a reaction mixture;
- and
- expanding the reaction mixture to produce the flexible foamed isocyanate-based polymer;
- wherein the second active hydrogen-containing compound consists essentially of an anti-yellowing amount of an active hydrogen-containing phosphite compound having the following formula
- wherein:
- R1, R2 and R3 may be the same or different and each is selected from the group comprising a C1-C40 aliphatic group optionally containing one or more heteroatoms, C5-C40 aromatic group optionally containing one or more heteroatoms and a C5-C50 araliphatic group optionally containing one or more heteroatoms;
- X1, X2 and X3 may be the same or different and each is selected from the group comprising hydroxyl, amino, carboxy, thiol and amido;
- and
- n is an integer in the range of from 1 to 10, and wherein the second active hydrogen-containing compound is present in the reaction in an amount in the range from of about 0.5 to about 3.0 parts by weight per 100 parts by weight of the first active hydrogen-containing compound, wherein, for a period of 48 hours after production, the foam has a B* value of up to about 90 percent of the B* value of a control foam produced from a control formulation identical to the formulation with the proviso that the control formulation is free of the second active hydrogen-containing compound.
6 more elements
A flexible isocyanate-based polymer foam produced from a formulation comprising:
- an isocyanate;
- a blowing agent consisting essentially of water;
- a first active hydrogen-containing compound;
- and
- a second active hydrogen-containing compound different than the first active hydrogen-containing compound and excluding tris(dipropyleneglycol) phosphite, the second active hydrogen-containing compound consisting essentially of an anti-yellowing amount of an active hydrogen-containing phosphite compound having the following formula
- wherein:
- R1, R2 and R3 may be the same or different and each is selected from the group comprising a C1-C40 aliphatic group optionally containing one or more heteroatoms, C5-C40 aromatic group optionally containing one or more heteroatoms and a C5-C50 araliphatic group optionally containing one or more heteroatoms;
- X1, X2 and X3 may be the same or different and each is selected from the group comprising hydroxyl, amino, carboxy, thiol and amido;
- and
- n is an integer in the range of from 1 to 10, with the proviso that the active hydrogen-containing phosphite compound is not present in an amount of 2 percent by weight of the foam, and wherein the second active hydrogen-containing compound is present in the reaction in an amount in the range from of about 0.5 to about 3.0 parts by weight per 100 parts by weight of the first active hydrogen-containing compound, and wherein, for a period of 48 hours after production, the foam has a B* value of up to about 90 percent of the B* value of a control foam produced from a control formulation identical to the formulation with the proviso that the control formulation is free of the second active hydrogen-containing compound.
7 more elements
A flexible isocyanate-based polymer foam produced from a formulation comprising:
- isocyanate;
- a blowing agent consisting essentially of water;
- a first active hydrogen-containing compound;
- and
- a second active hydrogen-containing compound different than the first active hydrogen-containing compound and excluding tris(dipropyleneglycol) phosphite, the second active hydrogen-containing compound consisting essentially of an anti-yellowing amount of an active hydrogen-containing phosphite compound having the following formula
- wherein:
- R1, R2 and R3 may be the same or different and each is selected from the group comprising a C1-C40 aliphatic group optionally containing one or more heteroatoms, C5-C40 aromatic group optionally containing one or more heteroatoms and a C5-C50 araliphatic group optionally containing one or more heteroatoms;
- X1, X2 and X3 may be the same or different and each is selected from the group comprising hydroxyl, amino, carboxy, thiol and amido;
- and
- n is an integer in the range of from 1 to 10, wherein, for a period of 48 hours after production, the foam has a B* value of up to about 85 percent of the B* value of a control foam produced from a control formulation identical to the formulation with the proviso that the control formulation is free of the second active hydrogen-containing compound, and wherein the second active hydrogen-containing compound is present in the reaction in an amount in the range from of about 0.5 to about 3.0 parts by weight per 100 parts by weight of the first active hydrogen-containing compound.
7 more elements
A flexible isocyanate-based polymer foam produced from a formulation comprising:
- isocyanate;
- a blowing agent consisting essentially of water;
- a first active hydrogen-containing compound;
- and
- a second active hydrogen-containing compound different than the first active hydrogen-containing compound and excluding tris(dipropyleneglycol) phosphite, the second active hydrogen-containing compound consisting essentially of an anti-yellowing amount of an active hydrogen-containing phosphite compound having the following formula
- wherein:
- R1, R2 and R3 may be the same or different and each is selected from the group comprising a C1-C40 aliphatic group optionally containing one or more heteroatoms, C5-C40 aromatic group optionally containing one or more heteroatoms and a C5-C50 araliphatic group optionally containing one or more heteroatoms;
- X1, X2 and X3 may be the same or different and each is selected from the group comprising hydroxyl, amino, carboxy, thiol and amido;
- and
- n is an integer in the range of from 1 to 10, wherein, for a period of 48 hours after production, the foam has a B* value of up to about 80 percent of the B* value of a control foam produced from a control formulation identical to the formulation with the proviso that the control formulation is free of the second active hydrogen-containing compound, and wherein the second active hydrogen-containing compound is present in the reaction in an amount in the range from of about 0.5 to about 3.0 parts by weight per 100 parts by weight of the first active hydrogen-containing compound.
7 more elements
Dependencies are inferred from the claim text.