Systems for priming and adhesion of flooring

A method for adhesively bonding floor coverings to pretreated substrates comprising applying a polyaspartate primer as pretreatment to a substrate and subsequently adhesively bonding the floor covering to the pretreated substrate to bond the floor covering to the pretreated substrate,

• wherein the polyaspartate primer consists essentially of
• (i) an isocyanate component comprising a polyisocyanate, and
• (ii) an amino-functional polyaspartic ester of the general formula (III),
• in which
• X is an m-valent organic radical containing a heteroatom obtained by removal of a primary amino group from a corresponding polyamine having a molecular weight of from 60 to 6000 g/mol and containing a (cyclo) aliphatically and/or araliphatically bonded primary amino group,
• R1 and R2 are identical or different organic radicals,
• m is an integer>1,
• and wherein the floor covering comprises a silane-modified polymer comprising an end group of the general formula (I),
• -An-R-SiVYZ (I),
• in which
• A is a divalent linking group comprising a heteroatom,
• R is a divalent hydrocarbon radical having 1-12 carbon atoms,
• V, Y, and Z are substituents on the Si atom, and independently comprise a C1-C8 alkyl, a C1-C8alkoxy, or a C1-C8 acyloxy group, wherein at least one of V, Y, and Z is a C1-C8alkoxy or a C1-C8 acyloxy group, and
• n is 0 or 1,
• wherein the floor covering comprises a curable composition applied between 1-72 h after applying the polyaspartate primer.

A kit comprising:

• a polyaspartate primer configured as pretreatment to a substrate;
• and
• a curable composition based on a silane-modified polymer, the curable composition configured to adhesively bond to the pretreated substrate,
• wherein the polyaspartate primer consists essentially of
• (i) an isocyanate component comprising a polyisocyanate, and
• (ii) an amino-functional polyaspartic ester of the general formula (III),
• in which
• X is an m-valent organic radical containing a heteroatom obtained by removal of a primary amino group from a corresponding polyamine having a molecular weight of from 60 to 6000 g/mol and containing a (cyclo) aliphatically and/or araliphatically bonded primary amino group,
• R1 and R2 are identical or different organic radicals,
• m is an integer>1,
• and wherein the silane-modified polymer comprises an end group of the general formula (I),
• -An-R-SiVYZ (I),
• in which
• A is a divalent linking group comprising a heteroatom,
• R is a divalent hydrocarbon radical having 1-12 carbon atoms,
• V, Y, and Z are substituents on the Si atom, and independently comprise a C1-C8 alkyl, a C1-C8alkoxy, or a C1-C8 acyloxy group, wherein at least one of V, Y, and Z is a C1-C8alkoxy or a C1-C8 acyloxy group, and
• n is 0 or 1,
• wherein the polyisocyanate comprises:
• 1,4-butane diisocyanate, 1,5-pentane diisocyanate, 1,6-hexane diisocyanate, 4-isocyanatomethyl-1,8-octane diisocyanate, 4,4′-methylenebis(cyclohexyl isocyanate), 3,5,5-trimethyl-1-isocyanato-3-isocyanatomethylcyclohexane, 1,3-bis(isocyanatomethyl)cyclohexane, 1,4-bis(isocyanatomethyl)cyclohexane, 1,5-naphthalene diisocyanate, a diisocyanatodiphenylmethane comprising 2,2′-diphenylmethane diisocyanate, 2,4′-diphenylmethane diisocyanate, 4,4′-diphenylmethane diisocyanate, or a mixture thereof, a diisocyanatomethylbenzene comprising 2,4-tolylene diisocyanate, 2,6-toylene diisocyanate, or a mixture thereof, 1,3-bis(isocyanatomethyl)benzene, 1,4-bis(isocyanatomethyl)benzene, 3,3′-dimethyl-4,4′-biphenyl diisocyanate, 1,4-paraphenylene diisocyanate, 1,3-tetramethylxylylene diisocyanates, or cyclohexyl diisocyanate.