Polyurethane coatings for bridge deckings and the like

Claim 2

Process of coating a substrate comprising applying thereto a polyurethane resin, said resin being the product obtained by reacting together Component A and Component B of a composition consisting essentially of two separate components, A and B; Component A consisting essentially of, in parts by weight, a low-molecular weight polyol having at least 3 hydroxyl groups and a molecular weight between 92 and about 200, about 3-10 parts; a poly(oxypropylene) triol containing only secondary hydroxyl groups, molecular weight about 500 to 3,000, 80-120 parts; and an elastomer, 0-60 parts; Component B, about 60-110 parts; being a polyisocyanate of the group consisting of (i) a mixture consisting essentially of (a) and (b), wherein (a) is a mixture of 4,4'-diphenylmethane diisocyanate and 2,4'-diphenylmethane diisocyanate; and (b) is polymeric MDI, viz., ##STR4## having a functionality of 2.3, wherein n is a variable in the range of 1 to 3 ; and (ii) a polyisocyanate material comprising about 45'50 weight % 4,4'-diphenylmethane diisocyanate and balance to make 100% of a polyisocyanate of the structure K-O-(CH 2 CH[CH 3 ]O) m -K, where K is ##STR5## and m is about 2-5.

Claim 3

Process according to claim 1 wherein the resin is the product obtained by reacting together Component A and Component B of said composition wherein, in parts by weight Component A consists essentially of: (i) glycerol, about 6.2; (ii) poly(oxypropylene) triol, about 100; (iii) elastomeric diol, about 25; (iv) molecular sieves, about 40; and (v) fumed silica, about 1.8; and Component B consists essentially of: (i) benzoyl chloride, about 0.1; and (ii) group member (ii), about 94 parts.

Claim 4

Process according to claim 1 wherein the resin is the product obtained by reacting together Component A and Component B of said composition wherein, in parts by weight Component A consists essentially of: (i) glycerol, about 6.2; (ii) poly(oxypropylene) triol, about 100; (iii) elastomeric diol, about 25; (iv) molecular sieves, about 40; and (v) fumed silica, about 1.8; and Component B consists essentially of: (i) benzoyl chloride, about 0.1; and (ii) about 69 parts group member (i), wherein (i) consists essentially of about 60-70% (a) and about 30-40% (b), wherein (a) consists essentially of about 90% 4,4'-diphenylmethane diisocyanate and about 10% 2,4'-diphenylmethane diisocyanate.

Claim 5

Process according to claim 1, 2 or 3 wherein the substrate is concrete.

Claim 6

Process according to claim 1, 2 or 3 wherein the substrate is metal.

Claim 7

Process according to claim 4 wherein the concrete is bridge decking.

Claim 8

Article comprising a substrate and a film coating adhered thereon, said film coating comprising the resin obtained by reacting together Component A and Component B of a composition consisting essentially of two separate components, A and B; Component A consisting essentially of, in parts by weight, a low molecular weight polyol having at least 3 hydroxyl groups and a molecular weight between 92 and about 200, about 3-10 parts; a poly(oxypropylene) triol containing only secondary hydroxyl groups, molecular weight about 500 to 3,000, 80-120 parts; and an elastomer, 0-60 parts; Component B, about 60-110 parts, being a polyisocyanate of the group consisting of (i) a mixture consisting essentially of (a) and (b), wherein (a) is a mixture of 4,4'-diphenylmethane diisocyanate and 2,4'-diphenylmethane diisocyanate; and (b) is polymeric MDI, viz., ##STR6## having a functionality of 2.3, wherein n is a variable in the range 1 to 3; and (ii) a polyisocyanate material comprising about 45-50 weight % 4,4'-diphenylmethane diisocyanate and balance to make 100% of a polyisocyanate of the structure K-O-(CH 2 CH[CH 3 ]O) m -K, where K is ##STR7## and m is about 2-5.

Claim 9

Article comprising a substrate and a film coating adhered thereon, said film coating comprising the resin obtained by reacting together Component A and Component B of a composition consisting essentially of two separate components, A and B; Component A consisting essentially of, in parts by weight, a low molecular weight polyol having at least 3 hydroxyl groups and a molecular weight between 92 and about 200, about 3-10 parts; a poly(oxypropylene) triol containing only secondary hydroxyl groups, molecular weight about 500 to 3,000, 80-120 parts; and an elastomer, 0-60 parts; Component B, about 60-110 parts, being a polyisocyanate of the group consisting of (i) a mixture consisting essentially of (a) and (b), wherein (a) is a mixture of 4,4'-diphenylmethane diisocyanate and 2,4'-diphenylmethane diisocyanate; and (b) is polymeric MDI, viz., ##STR6## having a functionality of 2.3, wherein n is a variable in the range 1 to 3; and (ii) a polyisocyanate material comprising about 45-50 weight % 4,4'-diphenylmethane diisocyanate and balance to make 100% of a polyisocyanate of the structure K-O-(CH 2 CH[CH 3 ]O) m -K, where K is ##STR7## and m is about 2-5.

Claim 10

Article according to claim 7 wherein the resin is obtained by reacting together Component A and Component B of said composition wherein, in parts by weight Component A consists essentially of: (i) glycerol, about 6.2; (ii) poly(oxypropylene) triol, about 100; (iii) elastomeric diol, about 25; (iv) molecular sieves, about 40; and (v) fumed silica, about 1.8; and Component B consists essentially of: (i) benzoyl chloride, about 0.1; and (ii) group member (ii), about 94 parts.

Claim 11

Article according to claim 7 wherein the resin is obtained by reacting together Component A and Component B of said composition wherein, in parts by weight Component A consists essentially of: (i) glycerol, about 6.2; (ii) poly(oxypropylene) triol, about 100; (iii) elastomeric diol, about 25; (iv) molecular sieves, about 40; and (v) fumed silica, about 1.8; and Component B consists essentially of: (i) benzoyl chloride, about 0.1; and (ii) about 69 parts group member (i), wherein (i) consists essentially of about 60-70% (a) and about 30-40% (b), wherein (a) comprises about 90% 4,4'-diphenylmethane diisocyanate and about 10% 2,4'-diphenylmethane diisocyanate.

Claim 12

Article according to claim 7, 8 or 9 wherein the substrate is concrete.

Claim 13

Article according to claim 7, 8 or 9 wherein the substrate is metal.

Claim 14

Article according to claim 10 wherein the concrete substrate is bridge decking.

Claim 15

Process of aiding in the protection of concrete bridge decking from damage due to traffic, road salt, weather, and associated injury-sources, wherein a polyurethane membrane is applied to the surface of the concrete decking followed by an asphalt layer; characterized in that the polyurethane is the resin obtained by reacting together Component A and Component B of a composition consisting essentially of two separate components, A and B; Component A consisting essentially of, in parts by weight, a low molecular weight polyol having at least 3 hydroxyl groups and a molecular weight between 92 and about 200, about 3-10 parts; a poly(oxypropylene) triol containing only secondary hydroxyl groups, molecular weight about 500 to 3,000, 80-120 parts; and an elastomer, 0-60 parts; Component B, about 60-110 parts, being a polyisocyanate of the group consisting of (i) a mixture consisting essentially of (a) and (b), wherein (a) is a mixture of 4,4'-diphenylmethane diisocyanate and 2,4'-diphenylmethane diisocyanate; and (b) is polymeric MDI, viz., ##STR8## having a functionality of 2.3, wherein n is a variable in the range of 1 to 3; and (ii) a polyisocyanate material comprising about 45-50 weight % 4,4'-diphenylmethane diisocyanate and balance to make 100% of a polyisocyanate of the structure K-O-(CH 2 CH[CH 3 ]O) m -K, where K is ##STR9## and m is about 2-5.

Claim 16

Process of aiding in the protection of concrete bridge decking from damage due to traffic, road salt, weather, and associated injury-sources, wherein a polyurethane membrane is applied to the surface of the concrete decking followed by an asphalt layer; characterized in that the polyurethane is the resin obtained by reacting together Component A and Component B of a composition consisting essentially of two separate components, A and B; Component A consisting essentially of, in parts by weight, a low molecular weight polyol having at least 3 hydroxyl groups and a molecular weight between 92 and about 200, about 3-10 parts; a poly(oxypropylene) triol containing only secondary hydroxyl groups, molecular weight about 500 to 3,000, 80-120 parts; and an elastomer, 0-60 parts; Component B, about 60-110 parts, being a polyisocyanate of the group consisting of (i) a mixture consisting essentially of (a) and (b), wherein (a) is a mixture of 4,4'-diphenylmethane diisocyanate and 2,4'-diphenylmethane diisocyanate; and (b) is polymeric MDI, viz., ##STR8## having a functionality of 2.3, wherein n is a variable in the range of 1 to 3; and (ii) a polyisocyanate material comprising about 45-50 weight % 4,4'-diphenylmethane diisocyanate and balance to make 100% of a polyisocyanate of the structure K-O-(CH 2 CH[CH 3 ]O) m -K, where K is ##STR9## and m is about 2-5.

Claim 17

Process according to claim 10, wherein the resin is the product obtained by reacting together Component A and Component B of said composition wherein, in parts by weight Component A consists essentially of: (i) glycerol, about 6.2; (ii) poly(oxypropylene) triol, about 100; (iii) elastomeric diol, about 25; (iv) molecular sieves, about 40; and (v) fumed silica, about 1.8; and Component B consists essentially of: (i) benzoyl chloride, about 0.1; and (ii) group member (ii), about 94 parts.

Claim 18

Process according to claim 10 wherein the resin is the product obtained by reacting together Component A and Component B of said composition wherein, in parts by weight Component A consists essentially of: (i) glycerol, about 6.2; (ii) poly(oxypropylene) triol, about 100; (iii) elastomeric diol, about 25; (iv) molecular sieves, about 40; and (v) fumed silica, about 1.8; and Component B consists essentially of: (i) benzoyl chloride, about 0.1; and (ii) about 69 parts group member (i), wherein (i) consists essentially of about 60-70% (a) and about 30-40% (b) wherein (a) comprises about 90% 4,4'-diphenylmethane diisocyanate and about 10% 2,4'-diphenylmethane diisocyanate.

Claim 19

Article comprising concrete bridge decking having applied thereon a layer of polyurethane resin obtained by reacting together Component A and Component B of a composition consisting essentially of two separate components, A and B; Component A consisting essentially of, in parts by weight, a low molecular weight polyol having at least 3 hydroxyl groups and a molecular weight between 92 and about 200, about 3-10 parts; a poly(oxypropylene) triol containing only secondary hydroxyl groups, molecular weight about 500 to 3,000, 80-120 parts; and an elastomer, 0-60 parts; Component B, about 60-110 parts, being a polyisocyanate of the group consisting of (i) a mixture consisting essentially of (a) and (b), wherein (a) is a mixture of 4,4'-diphenylmethane diisocyanate and 2,4'-diphenylmethane diisocyanate; and (b) is polymeric MDI, viz., ##STR10## having a functionality of 2.3, where n is a variable in the range of 1 to 3; and (ii) a polyisocyanate material comprising about 45-50 weight % 4,4'-diphenylmethane diisocyanate and balance to make 100% of a polyisocyanate of the structure K-O-(CH 2 CH[CH 3 ]O) m -K, wherein K is ##STR11## and m is about 2-5.; plus a layer of asphalt on the resin layer.

Claim 20

Article comprising concrete bridge decking having applied thereon a layer of polyurethane resin obtained by reacting together Component A and Component B of a composition consisting essentially of two separate components, A and B; Component A consisting essentially of, in parts by weight, a low molecular weight polyol having at least 3 hydroxyl groups and a molecular weight between 92 and about 200, about 3-10 parts; a poly(oxypropylene) triol containing only secondary hydroxyl groups, molecular weight about 500 to 3,000, 80-120 parts; and an elastomer, 0-60 parts; Component B, about 60-110 parts, being a polyisocyanate of the group consisting of (i) a mixture consisting essentially of (a) and (b), wherein (a) is a mixture of 4,4'-diphenylmethane diisocyanate and 2,4'-diphenylmethane diisocyanate; and (b) is polymeric MDI, viz., ##STR10## having a functionality of 2.3, where n is a variable in the range of 1 to 3; and (ii) a polyisocyanate material comprising about 45-50 weight % 4,4'-diphenylmethane diisocyanate and balance to make 100% of a polyisocyanate of the structure K-O-(CH 2 CH[CH 3 ]O) m -K, wherein K is ##STR11## and m is about 2-5.; plus a layer of asphalt on the resin layer.

Claim 21

Article according to claim 13 wherein the resin is the product obtained by reacting together Component A and Component B of said composition where, in parts by weight Component A consists essentially of: (i) glycerol, about 6.2; (ii) poly(oxypropylene) triol, about 100; (iii) elastomeric diol, about 25; (iv) molecular sieves, about 40; and (v) fumed silica, about 1.8; and Component B consists essentially of: (i) benzoyl chloride, about 0.1; and (ii) group member (ii), about 94 parts.

Claim 22

Article according to claim 13 wherein the rsin is the product obtained by reacting together a composition wherein, in parts by weight Component A consists essentially of: (i) glycerol, about 6.2; (ii) poly(oxypropylene) triol, about 100; (iii) elastomeric diol, about 25; (iv) molecular sieves, about 40; and (v) fumed silica, about 1.8; and Component B consists essentially of: (i) benzoyl chloride, about 0.1; and (ii) group member (i), wherein (i) consists essentially of about 60-70% (a) and about 30-40% (b), wherein (a) comprises about 90% 4,4'-diphenylmethane diisocyanate and about 10% 2,4'-diphenylmethane diisocyanate.