LOW-PHOSPHORUS LAMINATION ADDITIVES HAVING LOW EMISSION, IMPROVED INITIAL ADHESION AND IMPROVED HYDROLYSIS STABILITY
A composition is provided which is suitable for producing polyurethane systems appropriate for hot adhesive bonding. The composition includes from 0.1 to 20% by mass of an additive mixture comprising at least one organic phosphorus compound either alone or in combination with a crosslinker or extender.
1 . A composition suitable for producing polyurethane systems that are used for hot adhesive bonding, said composition comprising from 0.1 to 20% by mass based on the total composition of an additive mixture comprising at least one organic phosphorus compound (I) selected from compounds of formulae (Ia) to (Ic)
where m, n and p are identical or different and are each greater than or equal to 1,
q is greater than or equal to 1, and
R 1 , R 1′ , R 2 , R 2′ , R 3 and R 3′ are identical or different and are each —H, -alkyl or -phenyl,
where the indices r are identical or different and are each greater than or equal to 1, the indices s are identical or different and are each 0 or greater than or equal to 1,
t is greater than or equal to 1,
R 4 , R 4′ , R 5 and R 5′ are identical or different and are each —H, -alkyl or -phenyl,
R is a hydrogen radical, alkyl radical, phenyl radical, R″ or R′″ and
r+s is from 4 to 60, and
where r, s, t, R 4 , R 5 , R 4′ , R 5′ , R″ and R′″ are as defined for formula (Ib) and R 6 is —(CH 2 ) o —OH, where o is from 1 to 5,
and at least one compound (X) which has at least two functional groups capable of reacting with isocyanate groups (isocyanate-reactive groups) and has an equivalent mass of less than 400 g/mol, or of an additive mixture consisting of one or more compounds of the formula (Ic).
2 . The composition according to claim 1 , wherein the additive mixture is a mixture of one or more compounds (X) with one or more organic phosphorus compounds (I).
3 . The composition according to claim 1 , wherein the additive mixture comprises at least compound (X) containing ethylene oxide units.
4 . The composition according to claim 1 , wherein the additive mixture comprises a glycerol polyether, an ethoxylated bisphenol A as compound (X), or a combination thereof.
5 . The composition according to claim 1 , wherein the additive mixture comprises a glycerol polyether having from 9 to 12 alkylene oxide units, an ethoxylated bisphenol A having from 5 to 7 ethylene oxide units as compound (X) or a mixture thereof.
6 . The composition according to claim 1 , wherein the additive mixture comprises from 1 to 25 parts by mass of said organic phosphorus compounds (I) and from 75 to 99 parts by mass of said compounds (X).
7 . The composition according to claim 1 , further comprising at least one isocyanate component and at least one polyol component.
8 . The composition according to claim 7 further comprising one of more blowing agents, one or more urethane catalysts, one or more isocyanurate catalysts or any mixture thereof.
9 . A method for producing laminated structures comprising:
providing a polyurethane system comprising at least a composition comprising from 0.1 to 20% by mass based on the total composition of an additive mixture, said additive mixture comprising at least one organic phosphorus compound (I) selected from compounds of formulae (Ia) to (Ic)
where m, n and p are identical or different and are each greater than or equal to 1,
q is greater than or equal to 1, and
R′, R 1′ , R 2 , R 2′ , R 3 and R 3′ are identical or different and are each —H, -alkyl or -phenyl,
where the indices r are identical or different and are each greater than or equal to 1,
the indices s are identical or different and are each 0 or greater than or equal to 1,
t is greater than or equal to 1,
R 4 , R 4′ , R 5 and R 5′ are identical or different and are each —H, -alkyl or -phenyl,
R is a hydrogen radical, alkyl radical, phenyl radical, R″ or R′″ and
r+s is from 4 to 60, and
where r, s, t, R 4 , R 5 , R 4′ , R 5′ , R″ and R′″ are as defined for formula (Ib) and R 6 is —(CH 2 ) o —OH, where o is from 1 to 5,
and at least one compound (X) which has at least two functional groups capable of reacting with isocyanate groups (isocyanate-reactive groups) and has an equivalent mass of less than 400 g/mol, or of an additive mixture consisting of one or more compounds of the formula (Ic); and
bonding said polyurethane system to a surface of a substrate.
10 . A polyurethane including at least a composition according to claim 1 .
11 . A polyurethane foam comprising at least a composition according to claim 1 .
12 . A laminated structure comprising a polyurethane system hot adhesively bonded to a substrate, said polyurethane system comprising at least a composition including from 0.1 to 20% by mass based on the total composition of an additive mixture, said additive mixture comprising at least one organic phosphorus compound (I) selected from compounds of formulae (Ia) to (Ic)
where m, n and p are identical or different and are each greater than or equal to 1,
q is greater than or equal to 1, and
R 1 , R 1′ , R 2 , R 2′ , R 3 and R 3′ are identical or different and are each —H, -alkyl or -phenyl,
where the indices r are identical or different and are each greater than or equal to 1,
the indices s are identical or different and are each 0 or greater than or equal to 1,
t is greater than or equal to 1,
R 4 , R 4′ , R 5 and R 5′ are identical or different and are each —H, -alkyl or -phenyl,
R is a hydrogen radical, alkyl radical, phenyl radical, R″ or R′″ and
r+s is from 4 to 60, and
where r, s, t, R 4 , R 5 , R 4′ , R 5′ , R″ and R′″ are as defined for formula (Ib) and R 6 is —(CH 2 ) o —OH, where o is from 1 to 5,
and at least one compound (X) which has at least two functional groups capable of reacting with isocyanate groups (isocyanate-reactive groups) and has an equivalent mass of less than 400 g/mol, or of an additive mixture consisting of one or more compounds of the formula (Ic).
13 . The method according to claim 9 , wherein said bonding includes hot adhesive bonding.