US4145509A — Polyacrylated polyurethanes and gaskets having se…

Claim 1

Independent Claim 94 words

As a composition of matter, the reaction product of (a) a monoacrylated terminated, active hydrogen-containing hydrocarboxy reactant, (b) an aromatic diisocyanate, and (c) a polyacrylated terminated hydrocarboxy reactant, the active hydrogen of reactant (a) reacting with at least one isocyanate radical of reactant (b) to form an isocyanate linkage, the reaction product of reactants (a) and (b) being reacted with reactant (c) in a molar ratio, respectively, of from 1:25 to 25:1, said reactant (c) serving primarily as a cross-linking agent to bond together linear chains formed by the reaction of (a) and (b).

Claim 2

Dependent Claim 94 words

As a composition of matter, the reaction product of (a) a monoacrylated terminated, active hydrogen-containing hydrocarboxy reactant, (b) an aromatic diisocyanate, and (c) a polyacrylated terminated hydrocarboxy reactant, the active hydrogen of reactant (a) reacting with at least one isocyanate radical of reactant (b) to form an isocyanate linkage, the reaction product of reactants (a) and (b) being reacted with reactant (c) in a molar ratio, respectively, of from 1:25 to 25:1, said reactant (c) serving primarily as a cross-linking agent to bond together linear chains formed by the reaction of (a) and (b).

Claim 3

Dependent Claim 29 words

The composition of matter of claim 1 in which said monoacrylated hydrocarboxy reactant has an alkyl or alkenyl linear stem and a molecular weight of up to about 8,000.

Claim 4

Dependent Claim 34 words

The composition of matter of claim 1 in which said monoacrylated hydrocarboxy reactant has the formula: ##STR5## in which R is hydrogen or methyl, and n is a whole number from 1 to 8.

Claim 5

Dependent Claim 54 words

The composition of matter of claim 1 in which the aromatic diisocyanate moiety in said first-mentioned reaction product is selected from the group consisting of: ##STR6## ##STR7## in which R is hydrogen or methyl, R 1 is (C 2 H 4 O) n , and n is a whole number from 1 to 8.

Claim 6

Dependent Claim 50 words

The composition of matter of claim 1 in which said polyacrylated terminated, hydrocarboxy reactant is diacrylated and selected from the group consisting of an alkylene glycol diacrylate, alkylene glycol dimethacrylate, a polyalkylene glycol diacrylate, and a polyalkylene glycol dimethacrylate, in which said alkylene group contains 4 to 8 carbon atoms.

Claim 7

Dependent Claim 66 words

The composition of matter of claim 1 in which said aromatic diisocyanate in the reaction product formed by reactants (a) and (b) has one isocyanate radical reacted with said active hydrogen of reactant (a) and the other isocyanate radical reacted with a carboxyl radical of an organic acid to form an ester group, said ester group having a molecular weight of about 500 to about 6,000.

Claim 8

Dependent Claim 59 words

The composition of matter of claim 6 in which said esterified isocyanate radical has the formula: ##STR8## in which x is a whole number from 2 to 4, y is a whole number from 2 to 12, and n is a number sufficient to provide a molecular weight from about 500 to about 6,000 for said esterified isocyanate radical.

Claim 9

Dependent Claim 125 words

A gasket comprising a base sheet and a sealant thereon comprising the reaction product of (a) a monoacrylated terminated, active hydrogen-containing hydrocarboxy reactant, (b) an aromatic diisocyanate, and (c) a polyacrylated terminated hydrocarboxy reactant, the active hydrogen of reactant (a) reacting with at least one diisocyanate radical of reactant (b) to form an isocyanate linkage, the reaction product of reactants (a) and (b) being reacted with reactant (c) in a molar ratio, respectively, of from 1:25 to 25:1, said gasket having a compressibility at 1,000 psi of about 2% to about 20%, a film hardness by pencil test of 6B to 4H, an elongation of about 2% to about 100%, and a flexibility by mandrel test of from 1/8 inch to one inch without failure.

Claim 10

Dependent Claim 125 words

A gasket comprising a base sheet and a sealant thereon comprising the reaction product of (a) a monoacrylated terminated, active hydrogen-containing hydrocarboxy reactant, (b) an aromatic diisocyanate, and (c) a polyacrylated terminated hydrocarboxy reactant, the active hydrogen of reactant (a) reacting with at least one diisocyanate radical of reactant (b) to form an isocyanate linkage, the reaction product of reactants (a) and (b) being reacted with reactant (c) in a molar ratio, respectively, of from 1:25 to 25:1, said gasket having a compressibility at 1,000 psi of about 2% to about 20%, a film hardness by pencil test of 6B to 4H, an elongation of about 2% to about 100%, and a flexibility by mandrel test of from 1/8 inch to one inch without failure.

Claim 11

Dependent Claim 139 words

The gasket of claim 8 in which said first-mentioned reaction product is of (a) a monoacrylated terminated hydrocarboxy reactant having the formula: ##STR9## in which R is hydrogen or methyl, and n is a whole number from 1 to 8, (b) an aromatic diisocyanate selected from the group consisting of phenylene diisocyanate and toluylene diisocyanate, and (c) a diacrylated terminated, hydrocarboxy reactant selected from the group consisting of an alkylene glycol diacrylate, an alkylene glycol dimethacrylate, a polyalkylene glycol diacrylate, and a polyalkylene glycol dimethacrylate in which said alkylene group contains from 4 to 8 carbon atoms, the hydrogen of reactant (a) reacting with at least one isocyanate radical of reactant (b) to form an isocyanate linkage, and the reaction product of (a) and (b) being reacted with reactant (c) in a molar ratio, respectively, of 1:25 to 25:1.

Claim 12

Dependent Claim 32 words

The composition of matter of claim 9 in which said monoacrylated hydrocarboxy reactant is monoacrylated ethylene glycol, said aromatic diisocyanate is toluylene diisocyanate, and said diacrylated hydrocarboxy reactant is diacrylated tetraethylene glycol.

Claim 13

Dependent Claim 83 words

The gasket of claim 8 in which said base sheet is metallic and said first-mentioned reaction product contains from about 1% to about 40% by weight of metallic powder, and said gasket having temperature resistance up to 500° F., a compressibility at 1000 psi. of about 5% to about 20%, a film hardness by pencil test of 6B to 4H, an elongation of about 5% to about 25%, and a flexibility by mandrel test of from 1/8 inch to 1/4 inch without failure.

Claim 14

Dependent Claim 146 words

A process for preparing an improved gasket comprising placing on sheet material defining a base sheet of said gasket a reaction mixture from a solventless system, said mixture including (a) a monoacrylated terminated, active hydrogen-containing hydrocarboxy reactant, (b) an aromatic diisocyanate, and (c) a polyacrylated terminated, hydrocarboxy reactant, reacting the active hydrogen of reactant (a) with at least one isocyanate radical of reactant (b) to form an isocyanate linkage, and reacting the reaction product of reactants (a) and (b) with reactant (c) in a molar ratio, respectively, of 1:25 to 25:1, said improved gasket having a temperature resistance up to 500° F., a compressibility at 1000 psi. of about 2% to about 20%, a film hardness by pencil test of 6B to 4H, an elongation of about 2% to about 100%, and a flexibility by mandrel test of from 1/8 inch to one inch without failure.

Claim 15

Dependent Claim 146 words

A process for preparing an improved gasket comprising placing on sheet material defining a base sheet of said gasket a reaction mixture from a solventless system, said mixture including (a) a monoacrylated terminated, active hydrogen-containing hydrocarboxy reactant, (b) an aromatic diisocyanate, and (c) a polyacrylated terminated, hydrocarboxy reactant, reacting the active hydrogen of reactant (a) with at least one isocyanate radical of reactant (b) to form an isocyanate linkage, and reacting the reaction product of reactants (a) and (b) with reactant (c) in a molar ratio, respectively, of 1:25 to 25:1, said improved gasket having a temperature resistance up to 500° F., a compressibility at 1000 psi. of about 2% to about 20%, a film hardness by pencil test of 6B to 4H, an elongation of about 2% to about 100%, and a flexibility by mandrel test of from 1/8 inch to one inch without failure.

Claim 16

Dependent Claim 89 words

The process of claim 12 in which said monoacrylated hydrocarboxy reactant has the formula: ##STR10## in which R is hydrogen or methyl, and n is a whole number from 1 to 8, said aromatic diisocyanate is selected from the group consisting of phenylene diisocyanate and toluylene diisocyanate, and said polyacrylated hydrocarboxy reactant is diacrylated and selected from the group consisting of an alkylene glycol diacrylate, an alkylene glycol dimethacrylate, a polyalkylene glycol diacrylate, and a polyalkylene glycol dimethacrylate, in which said alkylene group contains 4 to 8 carbon atoms.

Claim 17

Dependent Claim 13 words

The process of claim 12 in which said reaction is generated by heat.

Claim 18

Dependent Claim 21 words

The process of claim 12 including a peroxide catalyst in said reaction mixture, and catalyzing said reaction by the peroxide catalyst.

Claim 19

Dependent Claim 27 words

The process of claim 12 in which said monoacrylated hydrocarboxy reactant has an alkyl or alkenyl linear stem and a molecular weight of up to about 8000.

Claim 20

Dependent Claim 32 words

The process of claim 12 in which said monoacrylated hydrocarboxy reactant has the formula: ##STR11## in which R is hydrogen or methyl, and n is a whole number from 1 to 8.

Claim 21

Dependent Claim 48 words

The process of claim 12 in which said polacrylated terminated, hydrocarboxy reactant is diacrylated and selected from the group consisting of an alkylene glycol diacrylate, alkylene glycol dimethacrylate, a polyalkylene glycol diacrylate, and a polyalkylene glycol dimethyacrylate, in which said alkylene group contains 4 to 8 carbon atoms.

Claim 22

Dependent Claim 64 words

The process of claim 12 in which said aromatic diisocyanate in the reaction product formed by reactants (a) and (b) has one isocyanate radical rected with said active hydrogen of reactant (b) and the other isocyanate radical reacted with a carboxyl radical of an organic acid to form an ester group, said ester group having a molecular weight of about 500 to about 6,000.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1982-03-19	1982-09-18	1983-03-20	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1986-03-19	1986-09-18	1987-03-20	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1990-03-19	1990-09-18	1991-03-20	$7700.00	Window Closed / Lapsed

Polyacrylated polyurethanes and gaskets having sealants thereof

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