Intumescent compositions and the use thereof

• US 4,857,364 A
• Filed: 12/14/1987
• Issued: 08/15/1989
• Est. Priority Date: 12/20/1986
• Status: Expired due to Fees

• Current Assignee: Bayer AG
• Original Assignee: Bayer AG
• Inventors: von Bonin, Wulf
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US07/132,513
• Time in Patent Office: 610 Days
• Field of Search: 528/72, 524/875, 427/255, 427/255.6, 427/372.2, 427/374.1, 427/388.2, 427/389.7, 427/393, 428/425.1, 428/425.5, 428/425.6, 428/425.8
• US Class Current: 427/254
• CPC Class Codes: C08G 18/0885 using additives, e.g. absorbing agents
• CPC Class Codes: C08G 18/3889 having nitrogen in addition to phosphorus
• CPC Class Codes: C08G 18/4018 Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C08K 3/34 Silicon-containing compounds
• CPC Class Codes: C08L 75/00 Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 75/04 Polyurethanes
• CPC Class Codes: Y10T 428/31591 Next to cellulosic
• CPC Class Codes: Y10T 428/31598 Next to silicon-containing [silicone, cement, etc.] layer
• CPC Class Codes: Y10T 428/31601 Quartz or glass
• CPC Class Codes: Y10T 428/31605 Next to free metal

Abstract

The intumescent compositions according to the invention are reaction mixtures which are obtained on mixing and reacting the following components:

(A) specific polyether polyols,

(B) specific polyester polyols,

(C) specific phosphorus-containing polyols,

(D) inert desiccants,

(E) dehydratable fillers,

(F) other inorganic auxiliaries and fillers,

(G) catalysts and

(H) polyisocyanates.

Claims

1. A propellant-free intumescent composition consisting essentially of product of the reaction of a phosphorus-containing and phosphorus-free polyol and a polyisocyanate, which is a reaction mixture, produced on mixing and reacting the following components:

(A) 5 to 25% by weight, relative to the total weight of components A to G, o a polyether polyol containing at least 1.75 OH groups per molecule and having an OH number from 150 to 400;

(B) 5 to 35% by weight, relative to the total weight of components A to G, of a polyester polyol containing at least 2OH groups per molecule and having an OH number from 120 to 400;

(C) 5 to 25% by weight, relative to the total weight of components A to G, of a phosphorus-containing polyol containing at least two OH groups per molecule and having a phosphorus content between 6 and 21% by weight, with the proviso that the total weight of components A+B+C makes up 15 to 70% by weight of the total weight of the reaction mixtures;

(D) 0 to 10% by weight, relative to the total weight of components A to G, of an inert desiccant;

(E) 20 to 85% by weight, relative to the total weight of the reaction mixture, of a dehydratable filler;

(F) 0 to 30% by weight, relative to the total weight of the reaction mixture, of other inorganic auxiliaries and fillers, with the proviso that the total weight of components D+E+F is 20 to 90% by weight relative to the total weight of the reaction mixture; and

(G) 0 to 3% by weight, relative to the total weight of components A+B+C, of a catalyst; and

(H) 70 to 130% b weight, relative to the amount which is stoichiometrically necessary for reaction of the active hydrogen atoms contained in the mixture of components A, B, and C, of a polyisocyanate.

2. Intumescent composition according to claim 1, which is a reaction mixture whose content of

component (A) is 7 to 17% by weight,

component (B) is 15 to 25% by weight,

component (C) is 5 to 15% by weight and

component (D) is 0.5 to 5% by weight, all % by weight being relative to the total weight of components A to G, and the total weight of components A+B+C makes up 30 to 45% by weight of the total weight of the reaction mixture;

whose content of component (E) is 40 to 55% by weight and of component (F) is 0 to 12% by weight, both % by weight being relative to the total weight of the reaction mixture, and the total weight of components D+E+F makes up 45 to 70% by weight, relative to the total weight of the reaction mixture;

whose content of component (G) is 0 to 1.5% by weight, relative to the total weight of components A+B+C, and of component (H) is 95 to 115% by weight, relative to the amount which is stoichiometrically necessary for reaction of the active hydrogen atoms contained in the mixture of components A, B and C.

3. A method for the production of a moulded article which has a protective action against fire and heat, which method comprises coating said article with a reaction mixture made from

(A) 5 to 25% by weight, relative to the total weight of components A to G, of a polyether polyol containing at least 1.75 OH groups per molecule and having an OH number from 150 to 400;

(B) 5 to 35% by weight, relative to the total weight of components A to G, of a polyester polyol containing at least 2OH groups per molecule and having an OH number from 150 to 400;

(C) 5 to 25% by weight, relative to the total weight of components A to B, of a phosphorus-containing polyol containing at least two OH groups per molecule and having a phosphorus content between 6 and 21% by weight with the proviso that the total weight of components A+B+C makes up 15 to 70% by weight of the total weight of the reaction mixture;

(D) 0 to 10% by weight, relative to the total weight of components A to G, of an inert desiccant;

(E) 20 to 85% by weight, relative to the total weight of the reaction mixture, of a dehydratable filler;

(F) 0 to 30% by weight, relative to the total weight of the reaction mixture, of other inorganic auxiliaries and fillers, with the proviso that the total weight of components D+E+F is 20 to 90% by weight relative to the total weight of the reaction mixture; and

(G) 0 to 3% by weight, relative to the total weight of components A+B+C, of a catalyst; and

(H) 70 to 130% by weight, relative to the amount which is stoichiometrically necessary for reaction of the active hydrogen atoms contained in the mixture of components A, B and C, of a polyisocyanate, in a mould.

4. A method according to claim 3 in which the reaction mixture has a content of

component (A) from 7 to 17% by weight,

component (B) from 15 to 25% by weight,

component (C) from 5 to 15% by weight and

component (D) from 0.5 to 5% by weight, all % weight being relative to the total weight of components A to G, and the total weight of components A+B+C makes up 30 to 45% by weight of the total weight of the reaction mixture;

and which has content of component (E) from 40 to 55% by weight and of component (F) from 0 to 12% by weight, both % by weight being relative to the total weight of the reaction mixture, and the total weight of components D+E+F makes up 45 to 70% by weight, relative to the total of the reaction mixture; and

which has a content of component (G) from 0 to 1.5% by weight, relative to the total weight of components A+B+C, and a component (H) from 95 to 115% by weight, relative to the amount which is stoichiometrically necessary for reaction of the active hydrogen atoms contained in the mixture of components A, B and C.

5. A method for the production of a coating which has a protective action against fire and heat, which method comprises spraying, brushing or pouring a reaction mixture made from

(A) 5 to 25% by weight, relative to the total weight of components A to G, of a polyether polyol containing at least 175 OH groups per molecule and having an OH number from 150 to 400;

(B) 5 to 35% by weight, relative to the total weight of components A to G, of a polyester polyol containing at least 2 OH groups per molecule and having an OH number from 150 to 400;

(C) 5 to 25% by weight, relative to the total weight of components A to G. of a phosphorus-containing polyol containing at least tow OH groups per molecule and having a phosphorus content between 6 and 21% by weight with the proviso that the total weight of components A+B+C makes up 15 to 70% by weight of the total weight of the reaction mixture;

(D) 0 to 10% by weight, relative to the total weight of components A to G, of an inert desiccant;

(E) 20 to 85% by weight, relative to the total weight of the reaction mixture, of a dehydratable filler;

(F) 0 to 30% by weight, relative to the total weight of the reaction mixture, of other inorganic auxiliaries and fillers, with the proviso that the total weight of components D+E+F is 20 to 90% by weight relative to the total weight of the reaction mixture; and

(G) 0 to 3% by weight, relative to the total weight of components A+B+C, of a catalyst; and

(H) 70 to 130% by weight, relative to the amount which is stoichiometrically necessary for reaction of the active hydrogen atoms contained in the mixture of components A, B and C, of a polyisocyanate, on a sheet mad®

from steel, aluminium, silicate, gypsum, wood or mineral wool.

6. A coating consisting essentially of the reaction mixture made from

(A) 5 to 25% by weight, relative to the total weight of components A to G, of a polyether polyol containing at least 1.75 OH groups per molecule and having an OH number from 150 to 400;

(B) 5 to 35% by weight, relative to the total weight of components A to G, of a polyester polyol containing at least 2OH groups per molecule and having an OH number from 150 to 400;

(C) 5 to 25% by weight, relative to the total weight of components A to G, of a phosphorus-containing polyol containing at least tow OH groups per molecule and having a phosphorus content between 6 and 21% by weight with the proviso that the total weight of components A+B+C makes up 15 to 70% by weight of the total weight of the reaction mixture;

(D) 0 to 10% by weight, relative to the total weight of components A to G, of an inert desiccant;

(E) 20 to 85% by weight, relative to the total weight of the reaction mixture, of a dehydratable filler;

(F) 0 to 30% by weight, relative to the total weight of the reaction mixture, of other inorganic auxiliaries and fillers, with the proviso that the total weight of components D+E+F is 20 to 90% by weight relative to the total weight of the reaction mixture; and

(G) 0 to 3% by weight, relative to the total weight of components A+B+C, of a catalyst; and

(H) 70 to 130% by weight, relative to the amount which is stoichiometrically necessary for reaction of the active hydrogen atoms contained in the mixture of components A, B and C, of a polyisocyanate.

7. A moulded article consisting essentially of the reaction mixture made from

(A) 5 to 25% by weight, relative to the total weight of components A to G, of a polyether polyol containing at least 1.75 OH groups per molecule and having an OH number from 150 to 400;

(B) 5 to 35% by weight, relative to the total weight of components A to G, of a polyester polyol containing at least 2 OH groups per molecule and having an OH number from 150 to 400;

(C) 5 to 25% by weight, relative to the total weight of components A to G, of a phosphorus-containing polyol containing at least tow OH groups per molecule and having a phosphorus content between 6 and 21% by weight with the proviso that the total weight of components A+B+C makes up 15 to 70% by weight of the total weight of the reaction mixture;

(D) 0 to 10% by weight, relative to the total weight of components A to G, of an inert desiccant;

(E) 20 to 85% by weight, relative to the total weight of the reaction mixture, of a dehydratable filler;

(F) 0 to 30% by weight, relative to the total weight of the reaction mixture, of other inorganic auxiliaries and fillers, with the proviso that the total weight of components D+E+F is 20 to 90% by weight relative to the total weight of the reaction mixture; and

(G) 0 to 3% by weight, relative to the total weight of components A+B+C, of a catalyst; and

(H) 70 to 130% by weight, relative to the amount which is stoichiometrically necessary for reaction of the active hydrogen atoms contained in the mixture of components A, B and C, of a polyisocyante, on a sheet made from steel, aluminium, silicate, gypsum, wood or mineral wool.