The present invention relates to aldehydes of the formula (I) which contain tertiary amino groups and at least one hydroxyl group. Aldehydes of this kind can be utilized broadly. Aldehydes of particular advantage can be incorporated into a polymer, and find use as curing agents and/or catalysts. Preferably they find use in adhesives and sealants.
LATENT CURING AGENT AND CURABLE POLYURETHANE COMPOSITION
申请人:SIKA TECHNOLOGY AG
公开号:US20200140599A1
公开(公告)日:2020-05-07
A compound of formula (I) having advantageous properties when used as a latent curing agent for compositions containing isocyanate groups, and to compositions containing the compound of formula (I). The compound of formula (I) is odourless, is liquid and has comparatively low viscosity at room temperature and is stable in storage together with isocyanates. It makes possible odourless single-component polyurethane compositions which have good stability in storage, do not produce bubbles when cured in the presence of moisture, and cause no problematic odour emissions, giving a cured elastic material having good mechanical properties, good heat stability, a surprisingly non-adhesive surface and little tendency towards plasticizer migration.
This invention relates to compounds corresponding to the following general formula: ##STR1## wherein M REPRESENTS AN INTEGER OF FROM 1 TO 6; N represents an integer of from 0 to 4; R.sub.1 represents an aliphatic hydrocarbon group containing from 2 to 6 carbon atoms; R.sub.2 and R.sub.3 which may be the same or different, each represents hydrogen, an aliphatic hydrocarbon group containing from 1 to 4 carbon atoms, a cycloaliphatic hydrocarbon group containing from 5 to 7 carbon atoms, or an aromatic hydrocarbon group containing from 6 to 10 carbon atoms, or when taken together with the ring carbon atom they may form a 5- or 6-membered cycloaliphatic hydrocarbon ring; R.sub.4 represents an aliphatic hydrocarbon group containing from 2 to 6 carbon atoms; and R.sub.5 represents a residue of the type which may be obtained by removing the isocyanate groups from an organic (n + m)-valent polyisocyanate. The invention also relates to a process for preparing urethanes which contain oxazolidine groups and optionally isocyanate groups, characterized in that N-hydroxyalkyl-oxazolidines are reacted with organic polyisocyanates at an OH/NCO ratio of from 1:1 to 1:6.
ONE-COMPONENT TYPE POLYURETHANE RESIN COMPOSITION FOR PREVENTING DETACHMENT OF CONCRETE PIECES AND TILES AND METHOD FOR PREVENTING DETACHMENT OF CONCRETE PIECES AND TILES USING SAME
申请人:Dyflex Corporation
公开号:US20130101744A1
公开(公告)日:2013-04-25
A one-component type polyurethane resin composition for preventing detachment of concrete pieces and tiles containing an isocyanate group-containing urethane prepolymer (A) and a thixotropy-imparting agent (B), and a method for forming a reinforcing layer on a surface of a concrete structure or tiled wall containing a resin coated film composed thereof, in order to provide a one-component type polyurethane resin composition for preventing detachment of concrete pieces and tiles, which has improved workability by being able to be applied with a trowel or brush, forms a transparent resin coated film after reactive curing that has improved weather resistance without applying a top coat, facilitates diagnosis of deterioration of concrete by being carried out visually during maintenance of concrete structures, is able to maintain the existing appearance of the tiled exteriors of buildings and other structures and eliminates dispersion to surrounding areas during application.
Hydrocurable compositions containing epoxy and oxazolidine or oxazine groups, their use as or in coating and impregnating compositions and polymer containing such groups
申请人:ROHM AND HAAS COMPANY
公开号:EP0033515A1
公开(公告)日:1981-08-12
Hydrocurable compositions are provided containing a plurality of epoxy groups and oxazolidine or oxazine groups which are storage stable for at least one month under anhydrous conditions. This stability is achieved by selecting oxazolidines or oxazines in which the 2-position carbon atom in the ring is free of hydrogen atoms and substituted by alkyl groups or an alkylene group which forms a hydrocarbon ring with that carbon atom. Upon exposure to moisture the oxa-groups ring open for reaction with the epoxy groups. The groups may be in the same or different components and thus the composition may comprise polyepoxide and a compound or polymer containing a plurality of the oxa-groups or a polymer containing both classes of groups. The latter polymer is one embodiment of the invention. The compositions may be used for coating, impregnating and adhesive purposes.