摘要:
Certain members of the class of N-silylalkyl-aspartic acid esters, when used to endcap polyurethane polymers, offer moisture curable, one-part sealant formulations having significantly improved physical property improvements over other members of the same class of organofunctional silanes. More specifically, polyurethane polymers terminated with either the dibutyl or diethyl maleate/primary aminoalkyl silane addition product offer sealants which substantially outperform comparative sealants obtained using polymers endcapped with other olefinic carboxylate ester (dimethyl maleate, dimethyl crotonate) or nitrile (acrylonitrile)/primary aminoalkyl silane addition products. Additionally, sealant formulations incorporating the dibutyl or diethyl maleate/primary aminoalkyl silane terminated polymers demonstrate unexpected improvements in both elongation and tensile strength performance. The dibutyl maleate and dimethyl maleate based polymers give significant increase in tear resistance.
摘要:
In accordance with the present invention, a hydrolyzable silane of low VOC-generating potential is provided which possesses: (i) at least one organofunctional group, said group being a non-bulky electron-withdrawing group and/or a group which interacts with an organic resin, the organofunctional group being bonded to a silicon atom of a hydrolyzable silyl group through a stable bridging groups; and (ii) at least one hydrolyzable group bonded to silicon and containing at least two heteroatoms selected from the group consisting of oxygen, nitrogen and their combinations, hydrolysis of the hydrolyzable group generating a compound having a vapor pressure lower than 0.1 mm Hg at 20° C. Further in accordance with the invention, a resinous composition of low VOC-generating potential is provided which comprises: a) a resinous composition property-enhancing amount of at least one hydrolyzable silane of low VOC-generating potential which possesses: (i) at least one organofunctional group, said group being a non-bulky electron-withdrawing group and/or a group which interacts with an organic resin (b), the organofunctional group being bonded to a silicon atom of a hydrolyzable silyl group through a stable bridging group, and (ii) at least one hydrolyzable group bonded to silicon and containing at least two heteroatoms selected from the group consisting of oxygen, nitrogen and their combinations, hydrolysis of the hydrolyzable group generating a compound having a vapor pressure lower than 0.1 mm Hg at 20° C; and, b) at least one organic resin containing at least one group capable of reacting with organofunctional group (i) of hydrolyzable silane (a) and/or with water.
摘要:
A crosslinkable silane-terminated polymer is provided which includes the reaction product of an isocyanate-terminated prepolymer and a silane possessing a plurality of hydrolysable sites and at least one active hydrogen-containing group which is reactive for isocyanate, the silane upon hydrolysis produces a reduced amount of volatile organic compound compared to that produced by the hydrolysis of a silane possessing an equivalent number of hydrolyzable sites all of which are hydrolyzable alkoxy groups.
摘要:
A solid polymeric substrate having a resin derived from curable silylated polyurethane composition exhibiting superior properties adhered thereto. The silylated polyurethane is prepared by reacting a polyol component with a diisocyanate component to form a hydroxyl-terminated prepolymer and endcapping the prepolymer with an isocyanate silane.
摘要:
In accordance with the present invention, a hydrolyzable silane of low VOC-generating potential is provided which possesses: (i) at least one organofunctional group, said group being a non-bulky electron-withdrawing group and/or a group which interacts with an organic resin, the organofunctional group being bonded to a silicon atom of a hydrolyzable silyl group through a stable bridging groups; and (ii) at least one hydrolyzable group bonded to silicon and containing at least two heteroatoms selected from the group consisting of oxygen, nitrogen and their combinations, hydrolysis of the hydrolyzable group generating a compound having a vapor pressure lower than 0.1 mm Hg at 20° C. Further in accordance with the invention, a resinous composition of low VOC-generating potential is provided which comprises: a) a resinous composition property-enhancing amount of at least one hydrolyzable silane of low VOC-generating potential which possesses: (i) at least one organofunctional group, said group being a non-bulky electron-withdrawing group and/or a group which interacts with an organic resin (b), the organofunctional group being bonded to a silicon atom of a hydrolyzable silyl group through a stable bridging group, and (ii) at least one hydrolyzable group bonded to silicon and containing at least two heteroatoms selected from the group consisting of oxygen, nitrogen and their combinations, hydrolysis of the hydrolyzable group generating a compound having a vapor pressure lower than 0.1 mm Hg at 20° C.; and, b) at least one organic resin containing at least one group capable of reacting with organofunctional group (i) of hydrolyzable silane (a) and/or with water.
摘要:
A solid polymeric substrate having a resin derived from curable silylated polyurethane composition exhibiting superior properties adhered thereto. The silylated polyurethane is prepared by reacting a polyol component with a diisocyanate component to form a hydroxyl-terminated prepolymer and endcapping the prepolymer with an isocyanate silane.
摘要:
The invention relates to an insulated glass unit having an increased service life. An outer glass pane and inner glass pane are sealed to a spacer to provide an improved gas impermeable space. The glass unit includes a curable two-part sealer composition which, upon curing, exhibits unexpectedly high adhesion to substrates.
摘要:
The invention relates to a high thermal efficiency, insulated glass unit structure sealed with a cured composition containing, inter alia, moisture-curable silylated resin, the cured composition exhibiting low permeability to gas(es).
摘要:
The invention relates to a high thermal efficiency, insulated glass unit structure sealed with a cured composition containing, inter alia, moisture-curable linear silylated resin and organic nanoclay, the cured composition exhibiting low permeability to gas(es).
摘要:
The invention relates to a high thermal efficiency, insulated glass unit structure sealed with a cured composition containing, inter alia, diorganopolysiloxane(s) and inorganic-organic nanocomposite(s), the cured composition exhibiting low permeability to gas(es).