One-coat adhesive systems

Claim 2

A heat-activable rubber-to-metal adhesive composition consisting essentially of (i) from about 2.5 to about 50 parts by weight of at least one isocyanatosilane selected from the group consisting of isocyanatosilane adducts of multifunctional organosilanes and polyisocyanates; (ii) 100-x parts by weight of at least one free polyisocyanate, wherein x is the amount, in parts by weight, of said isocyanatosilane adduct; (iii) from 0 to about 200 parts by weight, per 100 parts of combined weight of said isocyanatosilane adduct and said free polyisocyanate, of at least one aromatic nitroso compound; (iv) from 0 to about 200 parts by weight, per 100 parts of combined weight of said isocyanatosilane adduct and said free polyisocyanate, of at least one polymeric film-forming adjunct; and (v) from 0 to about 200 parts by weight, per 100 parts of combined weight of said isocyanatosilane adduct and said free polyisocyanate, of at least one inert filler material, said adhesive composition having an amount of total isocyanate which is greater than one molar equivalent of isocyanate per mole of isocyanatosilane adduct.

Claim 3

A composition according to claim 1 wherein said polyisocyanate employed in forming said adduct has the formula ##STR18## wherein R 8 is a divalent organic radical having from 1 to 8 carbon atoms; X is selected from the group consisting of hydrogen, halogen, alkyl radicals having from 1 to 8 carbon atoms, and alkoxy radicals having from 1 to 8 carbon atoms; m is 1 or 2; and n is a digit having an average value in the range from zero to 15.

Claim 4

A composition according to claim 2 wherein each of (iii), (iv), and (v) are zero.

Claim 5

A composition according to claim 2 wherein the amount of said aromatic nitroso compound is in the range from about 1 to about 200 parts by weight.

Claim 6

An adhesive composition according to claim 1 consisting essentially of (i) from about 2.5 to about 50 parts by weight of at least one isocyanatosilane adduct of multifunctional organosilanes and polyisocyanates, said adducts having as characteristic features at least one free isocyanate group, at least one silane grouping, and the structure ##STR19## the free isocyanate group and silane grouping of said adduct being joined to each other through the residue of said polyisocyanate reactant; wherein A is selected from the group consisting of --O--, --S--, --N<, and other groups containing an active hydrogen; R is a divalent aliphatic, cycloaliphatic or aromatic radical having from 1 to 20 carbon atoms; R 1 is a monovalent aliphatic, cycloaliphatic or aromatic radical having from 1 to 20 carbon atoms; R 2 is a monovalent aliphatic, cycloaliphatic or aromatic radical having from 1 to 8 carbon atoms; and a is zero or 1; (ii) 100-x parts by weight of at least one free polyisocyanate, wherein x is the amount, in parts by weight, of said isocyanatosilane adduct; (iii) from 0 to about 200 parts by weight, per 100 parts of combined weight of said isocyanatosilane adduct and said free polyisocyanate, of at least one aromatic nitroso compound; (iv) from 0 to about 200 parts by weight, per 100 parts of combined weight of said isocyanatosilane adduct and said free polyisocyanate, of at least one polymeric film-forming adjunct; and (v) from 0 to about 200 parts by weight, per 100 parts of combined weight of said isocyanatosilane adduct and said free polyisocyanate, of at least one inert filler material.

Claim 7

A composition according to claim 5 wherein the amount of aromatic nitroso compound is in the range from about 1 to about 200 parts by weight.

Claim 8

A composition according to claim 5 wherein the amount of said film-forming adjunct is in the range from about 10 to about 200 parts by weight.

Claim 9

A composition according to claim 7 wherein the amount of said aromatic nitroso compound is in the range from about 1 to about 200 parts by weight.

Claim 10

A composition according to claim 5 wherein the amount of said inert filler is in the range from about 10 to about 200 parts by weight.

Claim 11

A composition according to claim 9 wherein the amount of said aromatic nitroso compound is in the range from about 1 to about 200 parts by weight.

Claim 12

A composition according to claim 10 wherein the amount of said film-forming adjunct is in the range from about 10 to about 200 parts by weight.

Claim 13

A composition according to claim 5 wherein said polyisocyanate employed in forming said adduct has the formula ##STR20## wherein R 8 is a divalent organic radical having from 1 to 8 carbon atoms; X is selected from the group consisting of hydrogen, halogen, alkyl radicals having from 1 to 8 carbon atoms, and alkoxy radicals having from 1 to 8 carbon atoms; m is 1 or 2; and n is a digit having an average value in the range from zero to 15.

Claim 14

A composition according to claim 12 wherein the amount of aromatic nitroso compound is in the range from about 1 to about 200 parts by weight.

Claim 15

A composition according to claim 12 wherein the amount of said film-forming adjunct is in the range from about 10 to 200 parts by weight.

Claim 16

A composition according to claim 14 wherein the amount of said aromatic nitroso compound is in the range from about 1 to about 200 parts by weight.

Claim 17

A composition according to claim 12 wherein the amount of said inert filler is in the range from about 10 to about 200 parts by weight.

Claim 18

A composition according to claim 16 wherein the amount of said aromatic nitroso compound is in the range from about 1 to about 200 parts by weight.

Claim 19

A composition according to claim 17 wherein the amount of said film-forming adjunct is in the range from about 10 to about 200 parts by weight.

Claim 20

A composition according to claim 5 wherein said free polyisocyanate has the formula ##STR21## wherein R 8 , X, m and n are as previously defined.

Claim 21

A composition according to claim 19 wherein the amount of aromatic nitroso compound is in the range from about 1 to about 200 parts by weight.

Claim 22

A composition according to claim 19 wherein the amount of said film-forming adjunct is in the range from about 10 to about 200 parts by weight.

Claim 23

A composition according to claim 21 wherein the amount of said aromatic nitroso compound is in the range from about 1 to about 200 parts by weight.

Claim 24

A composition according to claim 19 wherein the amount of said inert filler is in the range from about 10 to about 200 parts by weight.

Claim 25

A composition according to claim 23 wherein the amount of said aromatic nitroso compound is in the range from about 1 to about 200 parts by weight.

Claim 26

A composition according to claim 24 wherein the amount of said film-forming adjunct is in the range from about 10 to about 200 parts by weight.

Claim 27

A composition according to claim 19 wherein said polyisocyanate employed in forming said adduct has the formula ##STR22## wherein R 8 , X, m and n are as previously defined.

Claim 28

A composition according to claim 26 wherein the amount of said aromatic nitroso compound is in the range from about 1 to about 200 parts by weight.

Claim 29

A composition according to claim 26 wherein the amount of said film-forming adjunct is in the range from about 10 to about 200 parts by weight.

Claim 30

A composition according to claim 28 wherein the amount of said aromatic nitroso compound is in the range from about 1 to about 200 parts by weight.

Claim 31

A composition according to claim 26 wherein the amount of said inert filler is in the range from about 10 to about 200 parts by weight.

Claim 32

A composition according to claim 30 wherein the amount of said aromatic nitroso compound is in the range from about 1 to about 200 parts by weight.

Claim 33

A composition according to claim 31 wherein the amount of said film-forming adjunct is in the range from about 10 to about 200 parts by weight.

Claim 34

A composition according to claim 5 wherein each of (iii), (iv), and (v) are zero.

Claim 35

A composition according to claim 5 wherein the amount of said aromatic nitroso compound is in the range from about 5 to about 200 parts by weight.

Claim 36

A composition according to claim 34 wherein the amount of said film-forming adjunct is in the range from about 10 to about 200 parts by weight.

Claim 37

A composition according to claim 34 wherein the amount of said inert filler is in the range from about 10 to about 200 parts by weight.

Claim 38

A composition according to claim 36 wherein the amount of said film-forming adjunct is in the range from about 10 to about 200 parts by weight.

Claim 39

A composition according to claim 12 wherein said aromatic nitroso compound is present in the range from about 5 to about 200 parts by weight.

Claim 40

A composition according to claim 38 wherein the amount of said film-forming adjunct is in the range from about 10 to about 200 parts by weight.

Claim 41

A composition according to claim 38 wherein the amount of said inert filler is in the range from about 10 to about 200 parts by weight.

Claim 42

A composition according to claim 40 wherein the amount of said film-forming adjunct is in the range from about 10 to about 200 parts by weight.

Claim 43

A composition according to claim 19 wherein each of (iii), (iv), and (v) are zero.

Claim 44

A composition according to claim 19 wherein the amount of said aromatic nitroso compound is in the range from about 5 to about 200 parts by weight.

Claim 45

A composition according to claim 43 wherein the amount of said film-forming adjunct is in the range from about 10 to about 200 parts by weight.

Claim 46

A composition according to claim 43 wherein the amount of said inert filler is in the range from about 10 to about 200 parts by weight.

Claim 47

A composition according to claim 45 wherein the amount of said film-forming adjunct is in the range from about 10 to about 200 parts by weight.

Claim 48

A composition according to claim 26 wherein each of (iii), (iv), and (v) are zero.

Claim 49

A composition according to claim 26 wherein the amount of said aromatic nitroso compound is in the range from about 5 to about 200 parts by weight.

Claim 50

A composition according to claim 48 wherein the amount of said film-forming adjunct is in the range from about 10 to about 200 parts by weight.

Claim 51

A composition according to claim 48 wherein the amount of said inert filler is in the range from about 10 to about 200 parts by weight.

Claim 52

A composition according to claim 50 wherein the amount of said film-forming adjunct is in the range from about 10 to 200 parts by weight.

Claim 53

A composition according to claim 51 wherein R 8 is methylene, X is hydrogen, m is 1 and n has an average value in the range from about 0.1 to about 4.

Claim 54

A composition according to claim 52 wherein A is --NH--, R is propylene, R 2 is methyl and a is zero.

Claim 55

A composition according to claim 52 wherein A is --NH--, R is propylene, R 2 is ethyl and a is zero.

Claim 56

A heat-activatable rubber-to-metal adhesive composition consisting essentially of (i) from about 2.5 to about 50 parts by weight of at least one isocyanatosilane having the general formula ##STR23## wherein R 0 is selected from the group consisting of divalent hydrocarbon and halogenated hydrocarbon radicals containing from 1 to 20 carbon atoms; R 1 is a monovalent aliphatic, cycloaliphatic or aromatic radical having from 1 to 20 carbon atoms; R 2 is a monovalent aliphatic, cycloaliphatic or aromatic radical having from 1 to 20 carbon atoms; and a is zero or 1; (ii) 100-x parts by weight of at least one free polyisocyanate, wherein x is the amount, in parts by weight, of said isocyanatosilane; (iii) an effective amount of at least one aromatic nitroso compound, said amount being sufficient to obtain an effective adhesive bond; (iv) from 0 to about 200 parts by weight, per 100 parts of combined weight of said isocyanatosilane and said free polyisocyanate, of at least one polymeric film-forming adjunct; and (v) from 0 to about 200 parts by weight, per 100 parts of combined weight of said isocyanatosilane and said free polyisocyanate, of at least one inert filler material, said adhesive composition having an isocyanate content greater than an amount equal to one molar equivalent of isocyanate per mole of isocyanosilane.

Claim 57

A heat-activatable rubber-to-metal adhesive composition consisting essentially of (i) from about 2.5 to about 50 parts by weight of at least one isocyanatosilane having the general formula ##STR23## wherein R 0 is selected from the group consisting of divalent hydrocarbon and halogenated hydrocarbon radicals containing from 1 to 20 carbon atoms; R 1 is a monovalent aliphatic, cycloaliphatic or aromatic radical having from 1 to 20 carbon atoms; R 2 is a monovalent aliphatic, cycloaliphatic or aromatic radical having from 1 to 20 carbon atoms; and a is zero or 1; (ii) 100-x parts by weight of at least one free polyisocyanate, wherein x is the amount, in parts by weight, of said isocyanatosilane; (iii) an effective amount of at least one aromatic nitroso compound, said amount being sufficient to obtain an effective adhesive bond; (iv) from 0 to about 200 parts by weight, per 100 parts of combined weight of said isocyanatosilane and said free polyisocyanate, of at least one polymeric film-forming adjunct; and (v) from 0 to about 200 parts by weight, per 100 parts of combined weight of said isocyanatosilane and said free polyisocyanate, of at least one inert filler material, said adhesive composition having an isocyanate content greater than an amount equal to one molar equivalent of isocyanate per mole of isocyanosilane.

Claim 58

A composition according to claim 55 wherein the amount of said aromatic nitroso compound is in the range from about 1 to about 200 parts by weight, per 100 parts of combined weight of said isocyanatosilane and said free polyisocyanate.

Claim 59

A composition according to claim 56 wherein the amount of said film-forming adjunct is in the range from about 10 to 200 parts by weight.

Claim 60

A composition according to claim 56 wherein the amount of said inert filler is in the range from about 10 to about 200 parts by weight.

Claim 61

A composition according to claim 58 wherein the amount of said film-forming adjunct is in the range from about 10 to about 200 parts by weight.

Claim 62

A composition according to claim 55 wherein the amount of said aromatic nitroso compound is in the range from about 5 to about 200 parts by weight, per 100 parts of combined weight of said isocyanatosilane and said free polyisocyanate.

Claim 63

A composition according to claim 60 wherein the amount of said film-forming adjunct is in the range from about 10 to about 200 parts by weight.

Claim 64

A composition according to claim 60 wherein the amount of said inert filler is in the range from about 10 to about 200 parts by weight.

Claim 65

A composition according to claim 62 wherein the amount of said film-forming adjunct is in the range from about 10 to about 200 parts by weight.

Claim 66

A composition according to claim 63 wherein said isocyanatosilane has the formula ##STR24## wherein R 0 has from 2 to 9 carbon atoms; R 1 is selected from the group consisting of alkyl radicals having from 1 to 4 carbon atoms, cycloalkyl radicals having from 4 to 7 ring carbon atoms, and aryl radicals having 6, 10 or 14 nuclear carbon atoms; and R 2 is selected from the group consisting of alkyl radicals having from 1 to 4 carbon atoms, --R 3 --O--R 4 , and ##STR25## where R 3 is an alkylene group having from 1 to 4 carbon atoms and R 4 is an alkyl group having from 1 to 4 carbon atoms.

Claim 67

A composition according to claim 64 wherein said isocyanatosilane is isocyanatopropyltriethoxysilane.