High solids urethanes and application thereof

Claim 1

A method for applying a polyurethane coating onto a substrate by employing a catalyzed coating composition comprising the steps: 1. Providing a coating composition comprised of: A. a polyol composition comprising (1) a polymerized low molecular weight polyol selected from the group consisting of (a) polycaprolactone; (b) a copolymer of a compound of the formula CH 2 ═C(R)--R 1 and allyl alcohol; and (c) mixtures thereof; (2) a saturated aliphatic polyol from 4 to 12 carbon atoms or a saturated cycloaliphatic polyol of from 5 to 8 carbon atoms per ring; wherein R is methyl, ethyl or hydrogen; R 1 is a group having 6 to 12 carbon atoms containing an aromatic carbocyclic ring, and said aromatic ring is directly bonded to the moiety CH 2 ═C(R)--; B. a polyisocyanate; wherein the ratio of NCO/OH of A and B ranges from about 0.9 to 1.2; the coating composition having a range of solids content from about 40 to about 100% by weight of A and B; and C. a compatible polyurethane catalyst; 2. Applying the coating composition to a substrate; and 3. Heating the coated substrate at a temperature-time range of from about 130° F to about 180° F for a period of time ranging from about 15 minutes to about 60 minutes to achieve a Tukon hardness of at least 3 within 24 hours.

Claim 2

A method for applying a polyurethane coating onto a substrate by employing a catalyzed coating composition comprising the steps: 1. Providing a coating composition comprised of: A. a polyol composition comprising (1) a polymerized low molecular weight polyol selected from the group consisting of (a) polycaprolactone; (b) a copolymer of a compound of the formula CH 2 ═C(R)--R 1 and allyl alcohol; and (c) mixtures thereof; (2) a saturated aliphatic polyol from 4 to 12 carbon atoms or a saturated cycloaliphatic polyol of from 5 to 8 carbon atoms per ring; wherein R is methyl, ethyl or hydrogen; R 1 is a group having 6 to 12 carbon atoms containing an aromatic carbocyclic ring, and said aromatic ring is directly bonded to the moiety CH 2 ═C(R)--; B. a polyisocyanate; wherein the ratio of NCO/OH of A and B ranges from about 0.9 to 1.2; the coating composition having a range of solids content from about 40 to about 100% by weight of A and B; and C. a compatible polyurethane catalyst; 2. Applying the coating composition to a substrate; and 3. Heating the coated substrate at a temperature-time range of from about 130° F to about 180° F for a period of time ranging from about 15 minutes to about 60 minutes to achieve a Tukon hardness of at least 3 within 24 hours.

Claim 14

A method for applying a polyurethane coating onto a substrate by employing a catalyzed coating composition comprising the steps: 1. Providing a thermo setting coating composition comprised of: a. a polyol composition comprising (1) a polymerized low molecular weight polyol selected from the group consisting of (a) polycaprolactone; (b) a copolymer of a Compound of the formula CH 2 ═C(R)--R 1 and allyl alcohol; and (c) mixtures thereof; (2) a saturated aliphatic polyol from 4 to 12 carbon atoms or a saturated cycloaliphatic polyol of from 5 to 8 carbon atoms per ring; wherein R is methyl, ethyl or hydrogen; R 1 is a group having 6 to 12 carbon atoms containing an aromatic carbocyclic ring, and said aromatic ring is directly bonded to the moiety CH 2 ═C(R)--; wherein the polymerized low molecular weight polyol of (a) has at least three functional groups per molecule; and b. a cross linking amount of a polyisocyanate having three functional groups; 2. Applying the coating composition to a substrate; and 3. Heating the coated substrate at a temperature-time range of from about 130° to about 180° F for a period of time ranging from about 15 minutes to about 60 minutes to achieve a Tukon hardness of at least 3 within 24 hours.

Claim 15

A method for applying a polyurethane coating onto a substrate by employing a catalyzed coating composition comprising the steps: 1. Providing a thermo setting coating composition comprised of: a. a polyol composition comprising (1) a polymerized low molecular weight polyol selected from the group consisting of (a) polycaprolactone; (b) a copolymer of a Compound of the formula CH 2 ═C(R)--R 1 and allyl alcohol; and (c) mixtures thereof; (2) a saturated aliphatic polyol from 4 to 12 carbon atoms or a saturated cycloaliphatic polyol of from 5 to 8 carbon atoms per ring; wherein R is methyl, ethyl or hydrogen; R 1 is a group having 6 to 12 carbon atoms containing an aromatic carbocyclic ring, and said aromatic ring is directly bonded to the moiety CH 2 ═C(R)--; wherein the polymerized low molecular weight polyol of (a) has at least three functional groups per molecule; and b. a cross linking amount of a polyisocyanate having three functional groups; 2. Applying the coating composition to a substrate; and 3. Heating the coated substrate at a temperature-time range of from about 130° to about 180° F for a period of time ranging from about 15 minutes to about 60 minutes to achieve a Tukon hardness of at least 3 within 24 hours.