Fire retardant polyesters

Claim 2

AN ETHYLENICALLY UNSATURATED POLYESTER HAVING AN AVERAGE MOLECULAR WEIGHT OF OT LEAST ABOUT 1100 AND CONTAINING AT LEAST AN AVERAGE OF TWO REACTIVE DOUBLE BONDS PER MOLECUALR CHAIN, SAID POLYESTER BEING OBTAINED BY REACTING AN ACID COMPONENT COMPRISING A POLYHALODICARBOXYLIC ACID OR ANHYDRIDE AND AN A, B-ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID OR ANHYDRIDE WITH A POLYOL COMPONENT COMPRISING FROM ABOUT 1 TO ABOUT 2 EQUIVALENT PROPORTIONS OF A POLYOL OF FUNCTIONALITY GREATER THAN TWO FROM 0 TO ABOUT 1 EQUVALENT PROPORTION OF A DIHYDRIC ALCOHOL AND FROM ABOUT 0.8 TO ABOUT 1.2 EQUVALENT PROPORTION OF A MONOFUNCTIONAL HALOALCOHOL OF THE FORMULA

Claim 3

The polyester of claim 1 wherein the acid component comprises from about 0.2 to 1 equivalent of the polyhalodicarboxylic acid or anhydride per equivalent of the Alpha , Beta -unsaturated dicarboxylic acid or anhydride.

Claim 4

The polyester of claim 2 wherein the polyhalodicarboxylic acid is chlorendic acid.

Claim 5

The polyester of claim 2 wherein the Alpha , Beta -unsaturated dicarboxylic acid or anhydride is maleic acid or anhydride.

Claim 6

The polyester of claim 1 wherein the polyol component contains also a diol.

Claim 7

The polyester of claim 1 wherein the polyol component comprises from 0 to about 1 equivalent of a diol, from about 1 to 2 equivalents of a polyol of functionality greater than two and from about 0.8 to about 1.2 equivalents of said halogenated monofunctional alcohol, the total equivalents of hydroxyl group present in said polyol mixture being about equal or slightly in excess of the total equivalents of carboxyl groups present.

Claim 8

The polyester of claim 6 wherein said diol is ethylene glycol, said polyol is glycerine and said monofunctional alcohol is 2,3-dibromopropanol.

Claim 9

The polyester of claim 1 wherein said polyester is dissolved in an ethylenic monomer co-polymerizable with said polyester.

Claim 10

The polyester of claim 8 wherein said ethylenic monomer is styrene.

Claim 11

The polyester of claim 1 wherein said polyester had an average molecular weight of from about 1,150 to about 1,450 and contains from 2 to about 2.6 reactive double bonds per molecular chain.

Claim 12

A solid, insoluble and infusible copolymerized fire retardant resin obtained by copolymerizing in the presence of a free radical catalyst an unsaturated polyester as defined in claim 1 with an ethylenic monomer.

Claim 13

A solid, insoluble and infusible copolymerized fire retardant resin obtained by co-polymerizing a polyester as defined in claim 7 with styrene in the presence of a free radical catalyst.

Claim 14

The fire retardant resin as described in claim 12 wherein the dicarboxylic acid mixture is a mixture of 2 equivalents of maleic anhydride and about 1 equivalent of chlorendic acid.

Claim 15

The fire retardant resin as described in claim 13 wherein the polyol mixture is a mixture of from about 0 to about 0.8 equivalents of ethylene glycol, about 1.2 to about 1.5 equivalents of glycerine and about 1 equivalent of 2,3-dibromopropanol, the total equivalents of hydroxyl groups present in said polyol mixture being slightly in excess of the total equivalents of carboxyl groups present.

Claim 16

A solid insoluble and infusible copolymerized fire retardant resin obtained by copolymerizing in the presence of a free radical catalyst an unsaturated polyester having an average molecular weight of from about 1150 to about 1450 and containing from about 2 to about 2.6 reactive double bonds per molecular chain, said polyester being the production of reaction of an acid component comprising about 1.5 to 0.5 equivalent proportion of chlorendic acid and about 1.5 to about 2.5 equivalent proportions of maleic anhydride with a polyol component comprising about 0.8 to about 1.2 equivalent proportions of 2,3-dibromo-1-propanol, from 0 to about 1 equivalent proportion of ethylene glycol, and from about 1 to about 2 equivalent proportions of glycerine with styrene in an amount of about 25 to about 40 percent by weight of the polyester-styrene mixture.

Claim 17

A solid insoluble and infusible copolymerized fire retardant resin obtained by copolymerizing in the presence of a free radical catalyst an unsaturated polyester having an average molecular weight of from about 1150 to about 1450 and containing from about 2 to about 2.6 reactive double bonds per molecular chain, said polyester being the production of reaction of an acid component comprising about 1.5 to 0.5 equivalent proportion of chlorendic acid and about 1.5 to about 2.5 equivalent proportions of maleic anhydride with a polyol component comprising about 0.8 to about 1.2 equivalent proportions of 2,3-dibromo-1-propanol, from 0 to about 1 equivalent proportion of ethylene glycol, and from about 1 to about 2 equivalent proportions of glycerine with styrene in an amount of about 25 to about 40 percent by weight of the polyester-styrene mixture.

Claim 18

The fire retardant resin of claim 11 having improved weatherability which resins comprise a weather stabilizing amount of a trialkyl phosphate.

Claim 19

The resin of claim 16 in which the trialkyl phosphate is triethyl phosphate.

Claim 20

The resin of claim 17 in which the triethyl phosphate is present in an amount of from about 3 phr to about 12 phr.

Claim 21

ThE resin of claim 16 in which the triethyl phosphate is present in an amount of from about 5 to about 10 phr.