Low viscosity copolymer polyisocyanates

Claim 2

In a liquid polymer/polyisocyanate composition prepared by the in-situ polymerization of at least one ethylenically unsaturated monomer in an organic polyisocyanate, the improvement which comprises carrying out said in-situ polymerization in the presence of a minor amount of an adduct prepared by the reaction of an excess of a carbodiimide-free organic polyisocyanate and a hydroxyl containing ethylenically unsaturated monomer.

Claim 3

A composition according to claim 1 wherein said adduct comprises from about 2 to about 25 percent by weight thereof.

Claim 4

A composition according to claim 1 wherein said adduct is prepared by the reaction of (a) said carbodiimide-free organic polyisocyanate and (b) from about 0.01 to about 0.2 equivalent per equivalent of said (a) of a hydroxyl containing ethylenically unsaturated monomer.

Claim 5

A composition according to claim 3 wherein said hydroxyl monomer (b) comprises a hydroxyalkyl (meth)acrylate.

Claim 6

A composition according to claim 1 wherein the carbodiimide-free polyisocyanate in said adduct is selected from the group consisting of aliphatic, aromatic, and cycloaliphatic polyisocyanates.

Claim 7

A composition according to claim 1 wherein the carbodiimide-free polyisocyanate in said adduct comprises an aromatic polyisocyanate.

Claim 8

A composition according to claim 1 wherein the polymer derived from said at least one unsaturated monomer comprises from about 10 to about 30 percent by weight of the composition.

Claim 9

A composition according to claim 1 wherein said in-situ polymerization is carried out in the presence of a free radical initiating catalyst and at a temperature of from about 25° C. to about 200° C.

Claim 10

A composition according to claim 1 wherein said organic polyisocyanate is an aromatic polyisocyanate.

Claim 11

A composition according to claim 1 wherein said at least one ethylenically unsaturated monomer is selected from the group consisting of (meth)acrylonitrile, (meth)acrylic monomers, vinyl halides, and mixtures thereof.

Claim 12

A composition according to claim 10 wherein said monomer comprises a mixture of a (meth)acrylonitrile and a (meth)acrylic monomer.

Claim 13

A composition according to claim 10 wherein said monomer is a mixture of an acrylic monomer and a minor amount of a hydroxyalkyl acrylate.

Claim 14

A composition according to claim 10 wherein said monomer is a vinyl halide.

Claim 15

A liquid polymer/polyisocyanate composition comprising the product of polymerizing in-situ in an aromatic polyisocyanate at least one ethylenically unsaturated monomer selected from the group consisting of a (meth)acrylonitrile, (meth)acrylic monomers, vinyl halides, and mixtures thereof at a temperature of from about 25° C. to about 200° C. in the presence of both a free radical initiating catalyst and from about 2 to about 25 percent by weight of the total composition of an adduct prepared by the reaction of (a) a carbodiimide-free aromatic polyisocyanate, and (b) from about 0.01 to about 0.2 equivalent per equivalent of said polyisocyanate (a) of a hydroxyalkyl (meth)acrylate, and wherein the polymer derived from said at least one unsaturated monomer comprises from about 10 to about 30 percent by weight of said composition.

Claim 16

A liquid polymer/polyisocyanate composition comprising the product of polymerizing in-situ in an aromatic polyisocyanate at least one ethylenically unsaturated monomer selected from the group consisting of a (meth)acrylonitrile, (meth)acrylic monomers, vinyl halides, and mixtures thereof at a temperature of from about 25° C. to about 200° C. in the presence of both a free radical initiating catalyst and from about 2 to about 25 percent by weight of the total composition of an adduct prepared by the reaction of (a) a carbodiimide-free aromatic polyisocyanate, and (b) from about 0.01 to about 0.2 equivalent per equivalent of said polyisocyanate (a) of a hydroxyalkyl (meth)acrylate, and wherein the polymer derived from said at least one unsaturated monomer comprises from about 10 to about 30 percent by weight of said composition.

Claim 17

A composition according to claim 14 wherein the components of said adduct comprise (a) a polymethylene polyphenyl polyisocyanate and (b) 2-hydroxyethyl (meth)-acrylate.

Claim 18

A composition according to claim 15 wherein said aromatic polyisocyanate is a carbodiimide containing methylenebis(phenyl isocyanate).

Claim 19

A composition according to claim 16 wherein said ethylenically unsaturated monomer comprises a major proportion of acrylonitrile and a minor proportion of acrylamide and said in-situ polymerization was carried out in the additional presence of a catalytic amount of iodine.

Claim 20

A composition according to claim 16 wherein said ethylenically unsaturated monomer comprises a mixture of 2-ethylhexyl acrylate and at least 10 percent by weight of 2-hydroxyethyl acrylate.

Claim 21

A composition according to claim 15 wherein said aromatic polyisocyanate comprises a polymethylene polyphenyl polyisocyanate.

Claim 22

A composition according to claim 19 wherein said ethylenically unsaturated monomer comprises vinylidene chloride.

Claim 23

A process for the preparation of a liquid polymer/polyisocyanate composition by the in-situ polymerization of at least one ethylenically unsaturated monomer in an organic polyisocyanate said process characterized by carrying out said polymerization in the presence of a minor amount of an adduct prepared by the reaction of an excess of a carbodiimide-free organic polyisocyanate and a hydroxyl containing ethylenically unsaturated monomer.

Claim 24

A process for the preparation of a liquid polymer/polyisocyanate composition by the in-situ polymerization of at least one ethylenically unsaturated monomer in an organic polyisocyanate said process characterized by carrying out said polymerization in the presence of a minor amount of an adduct prepared by the reaction of an excess of a carbodiimide-free organic polyisocyanate and a hydroxyl containing ethylenically unsaturated monomer.

Claim 25

A molded polyurethane polymer prepared from the reaction in a mold of a mixture comprising an organic polyol, an extender, and a liquid polymer/polyisocyanate composition in accordance with claim 1.