A two-part curable adhesive composition includes a main agent (A) containing a urethane prepolymer (a1) and a remaining polyisocyanate (a2), and a curing agent (B) containing a non-crystalline polyol compound (b1) and a polyamine compound (b2). An equivalent ratio of an isocyanate group in a raw polyisocyanate to a hydroxyl group in a crystalline polyol compound constituting the urethane prepolymer (a1) is from 2.05 to 12. An NCO group/total active hydrogen group ratio is from 0.5 to 4. An isocyanate group/hydroxyl group ratio is from 2 to 12.

The polymer comprises units of formula (I) and of formula (Ibis), being comprised the molar ratio between units (I) and (Ibis) comprised from 1.0:0.2 to 1.0:0.8, and wherein R.sub.4 are independently selected from radicals of formula (II), (III), and (IV), R.sub.1 and R.sub.1′ are independently selected from: —H, (C.sub.1-C.sub.20)alkyl, (C.sub.5-C.sub.14)aryl, —OR.sub.5, —(CO)R.sub.6, —O(CO)R.sub.7, —(SO)R.sub.8, —NH—CO—R.sub.9, —COOR.sub.10, —NR.sub.11R.sub.12, —NO.sub.2, and halogen; R.sub.2, R.sub.2′, R.sub.3, and R.sub.3′ are —H; P is a polymeric chain, R.sub.5 to R.sub.12 are independently selected: —H, (C.sub.1-C.sub.20)alkyl, and (C.sub.5-C.sub.14)aryl;R.sub.13 and R.sub.14 are independently selected from (C.sub.1-C.sub.5)alkyl, and (C.sub.5-C.sub.14)aryl;, m is from 3 to 4; n is from 1 to 2; and p is from 1 to 2 provided that n+m+p sums 6; the polymer comprising from 5 to 25 weight % of urea moieties, and having H-bonding and pi-pi staking interactions between the urea groups, and a tensile strength comprised from 3 to 15 MPa.

An object of the present invention is to provide a urethane adhesive composition having excellent initial adhesiveness and excellent adhesion durability. The present invention is a urethane adhesive composition containing a urethane prepolymer (A) having an isocyanate group, an isocyanate compound (B) having an isocyanurate structure and an isocyanate group, and an adduct of a compound represented by Formula (X) below (in Formula (X), R.sup.11 and R.sup.12 each independently represent a hydrocarbon group) and a phenol compound. ##STR00001##

A moisture-curing composition including a) at least one moisture-reactive polymer P with a proportion of 10% to 60% by weight, based on overall composition, b) at least one inorganic filler F with a proportion of at least 9% by weight, based on overall composition, c) between 3% and 25% by weight, based on overall composition, of at least one type of microscopic hollow beads H, wherein composition has density of less than 1.20 kg/l, and microscopic hollow beads H have compressive strength, measured to ASTM D3102-72, of at least 2.5 MPa, and microscopic hollow beads H have a volume-based particle size D90, measured by Coulter counter, of less than 100 μm.

The present invention relates to a dimensionally stable adhesive compound which is formulated so as to be largely water- and solvent-free and can be brought into contact with the substrate to be bonded by being wiped on in the form of a thin adhesive film that is suitable in particular for bonding materials obtained from plant fibers. The organic constituent of the adhesive compound according to the invention consists predominantly of a mixture of polyether polyurethanes which are end-capped with at least two monohydric aliphatic alcohols of different chain lengths. The invention also relates to a method for applying a tacky film to a planar substrate, preferably to paper, by wiping the adhesive compound onto the point of contact with the substrate.

The two-part curable adhesive composition contains a main agent (A) containing a urethane prepolymer (a1) and a residual polyisocyanate (a2), and a curing agent (B) containing a polyol compound (b1) and a polyamine compound (b2). The urethane prepolymer (a1) is made by reacting in an equivalent ratio of an isocyanate group in a raw material polyisocyanate to a hydroxy group in a polycarbonate polyol being 2.05 or greater. The equivalent ratio of an isocyanate group in the main agent (A) to an active hydrogen group in the curing agent (B) is from 0.5 to 4.

A two-part curable adhesive composition includes a main agent (A) containing a urethane prepolymer (a1) and a remaining polyisocyanate (a2), and a curing agent (B) containing a non-crystalline polyol compound (b1) and a polyamine compound (b2). An equivalent ratio of an isocyanate group in a raw polyisocyanate to a hydroxyl group in the polyol compound is from 2.05 to 12. The equivalent ratio of the isocyanate group in the main agent (A) to an amino group in the polyamine compound (b2) is from 1.2 to 6. The equivalent ratio of the isocyanate group in the main agent (A) to the hydroxyl group in the non-crystalline polyol compound (b1) is from 2 to 12.

Copolymers of propylene oxide and ethylene oxide have an inner block that contains from 65-90 weight percent oxyethylene units and from 10 to 35 weight percent oxypropylene units. This block has a molecular weight of from 150 to 350. The copolymer has an outer block which contains at least 95 weight % oxypropylene units and from 0 to 5% oxyethylene units. The equivalent weight of the copolymer is from 800 to 2000. The copolymers are useful in making polyurethane foams that have unexpectedly high tensile and/or tear strengths.

A polymer made by: (A) initially reacting poly(propylene glycol) with tolylene diisocyanate to form an intermediate product, and (B) subsequently reacting the resulting intermediate product with at least one polyol, wherein the polyol was derived from, or is, a plant oil.

Isopropylidenediphenol-based polyether polyols, processes for their production, foams produced using such isopropylidenediphenol-based polyether polyols, such as PUR-PIR rigid foams, as well as to processes for producing such foams. The polyether polyols have an internal block comprising polymerized ethylene oxide moieties and an external cap comprising polymerized propylene oxide moieties.