A urethane oligomer according to a) or b) has: a) at least two backbone residues R issued from a polyisocyanate without the NCO groups, linked between them with a diol residue R.sub.B (diol without the two OH groups) by two urethane bonds and each backbone residues R carrying (or linked to) at least two urethane segments each containing at least one terminal allyl group, b) at least one backbone residue R issued from a polyisocyanate without the NCO groups, the backbone residue R carrying (or linked to) at least two urethane segments each linked to R by one urethane bond with at least one urethane segment (arm) containing at least one terminal allyl group, and at least one urethane segment (arm) containing at least one terminal (meth)acrylate group. A curable composition containing the urethane oligomer reduces oxygen inhibition in coatings, adhesives, sealants or in resin matrix with good surface properties.

Bioactive liquid formulations are formed of combinations of absorbable, segmented aliphatic polyurethane compositions and liquid polyether for use as vehicles for the controlled release of at least one active agent for the conventional and unconventional treatment of different forms of cancer and the management of at least one type of bacterial, fungal, and viral infection.

The present disclosure provides a crosslinking agent, the preparation process and uses thereof, a hydrogel and a biodegradable cryogel including the crosslinking agent.

In a polyurethane gel 1 including a gel layer 2 and a coat layer 3 covering the gel layer 2, the gel layer 2 is produced by allowing at least aliphatic polyisocyanate having an average functionality of more than 2.0 to react with polyol having an average functionality of 3.0 or less, and the coat layer 3 is produced by allowing at least aliphatic diisocyanate and/or alicyclic diisocyanate to react with bifunctional active hydrogen compound.

A flame retarded slabstock polyurethane foam composition including polyol and polyisocyanate as main materials, and an additive for forming a general polyurethane foam except for a flame retarded agent, in which the polyol may be polyether polyol and may include 10 to 45 wt % of polyether polyol (A) having a weight-average molecular weight of 2,000 to 5,000 g/mol and 55 to 90 wt % of polyether polyol (B) having a weight-average molecular weight of 600 to 1,500 g/mol, and an isocyanate index of the composition defined by Equation 1 may be in a range of 70 to 95, and Equation 1 may be Isocyanate index=mole of isocyanate group (NCO)/mole of hydroxyl group (OH)×100.

A zwitterionic polysiloxane polymer (e.g., a polyurethane elastomer) composition having poly(dialkylsiloxane) blocks and a zwitterionic moiety is prepared by the copolymerization of a poly(dialkylsiloxane) diol, a diisocyanate, a tertiary amine alkyl diol, and a poly(dialkylsiloxane) diamine to form a poly(urethane urea) copolymer. A substituted saturated heterocylic compound is reacted with the tertiary amine of the poly(urethane urea) copolymer to introduce a zwitterionic group into the poly(urethane urea) copolymer backbone. A polysiloxane polymer having a zwitterionic moiety is prepared by reacting a diallyl tertiary amine compound and a substituted saturated heterocylic compound to form a diallyl zwitterionic macromer and cross-linking a vinyl terminated poly(dialkylsiloxane) and the diallyl zwitterionic macromer with a curing agent to introduce a zwitterionic group into the poly(dialkylsiloxane) polymer.

Methods for recovering monomers from polymers, such as polyurethanes (including thermoset polyurethanes) include heating the polymer to depolymerize the polymer and release the monomer. The monomer may be directly recovered. The polymer may include a poly(β-methyl-δ-valerolactone) (PMVL) block and the monomer recovered may be β-methyl-δ-valerolactone (MVL).

A flame retardant slabstock polyurethane foam composition includes polyol and polyisocyanate as main ingredients and an ordinary additive, excluding a flame retardant, for forming polyurethane foams. The polyol is bio-polyetherpolyol derived from vegetable oil and comprises 50% to 90% by weight of polyetherpolyol (A) having a weight average molecular weight of 3,000 to 6,000 g/mol and 10% to 50% by weight of polyetherpolyol (B) having a weight average molecular weight of 500 to 1,000 g/mol. An isocyanate index of the polyol defined by the following Equation 1 is 70 to 95

[00001]$\begin{array}{cc}\mathrm{Isocyanate}.Math..Math.\mathrm{Index}=\frac{\mathrm{Number}.Math..Math.\mathrm{of}.Math..Math.\mathrm{moles}.Math..Math.\mathrm{of}.Math..Math.\mathrm{iscocyanate}.Math..Math.\mathrm{groups}.Math..Math.\left(\mathrm{NCO}\right)}{\mathrm{Number}.Math..Math.\mathrm{of}.Math..Math.\mathrm{moles}.Math..Math.\mathrm{of}.Math..Math.\mathrm{hydroxyl}.Math..Math.\left(\mathrm{OH}\right).Math..Math.\mathrm{groups}}\times 100.& \left[\mathrm{Equation}.Math..Math.1\right]\end{array}$

An organophosphorus compound useful in a phosphorus containing flame retardant and a flame retardant polyurethane foam, where the organophosphorus compound is shown in Formula (I) where Y is selected from the group consisting of an —OH group, an —NH.sub.2 group, an —NHR.sup.3 group, and an —SH group, where R.sup.3 is a monovalent hydrocarbyl group having 1 to 10 carbon atoms; R is a divalent hydrocarbyl group; X is a heteroatom group; and R.sup.1 and R.sup.2 are each independently a substituted or unsubstituted hydrocarbyl group, wherein R.sup.1 and R.sup.2 can be optionally joined to form a ring. ##STR00001##

The present invention provides a stabilising composition, comprising: a) a first phenolic antioxidant comprising one or more phenolic compounds having the structure of formula (I):

##STR00001##  wherein R.sub.1 is a linear or branched alkyl group having from 12 to 20 carbon atoms; and b) one or more second phenolic antioxidants independently selected from:  a mono-hydroxybenzene having lower steric hindrance than the first  phenolic antioxidant;  a di-hydroxybenzene; and/or  a tri-hydroxybenzene.