1. A process for the production of a polyurethane product by reaction of a mixture of
(a) at least one organic polyisocyanate with
(b) a polyol composition comprising
(b1) from 0 to 99 percent by weight of at least one polyol compound having a nominal starter functionality of 2 to 8 and a hydroxyl number from 20 to 800, and
(b2) from 1 to 100 percent by weight of at least one polyol wherein the polyol has tertiary amine end-capping having autocatalytic function and no carbonate, urethane or ester groups when the tertiary amine is a dialkylamino moiety,
(c) optionally in the presence of one or more polyurethane catalysts, with the proviso that no tin catalyst is used when the tertiary amine of polyol (b2) is a dialkylamino group in a position Beta to a terminal hydroxyl moiety,
(d) optionally in the presence of a blowing agent; and
(e) optionally additives or auxiliary agents known per se for the production of polyurethane foams, elastomers andor coatings.
2. The process of claim 1 wherein (b) is a polyol blend containing 5 to 99 percent by weight of (b1) and 1 to 95 percent by weight of (b2).
3. A process for the production of a flexible polyurethane foam by reaction of a mixture of
(a) at least one organic polyisocyanate with
(b) a polyol composition having an average functionality of 3 to 6 and an average hydroxyl number of 20 to 100 wherein the polyol comprises, based on the total amount of polyol component (b)
(b1) from 5 to 99 percent by weight of a polyol having a functionality of 2 to 8 and a hydroxyl number of 20 to 100 and
(b2) from 1 to 95 percent by weight of at least one polyol wherein the polyol has tertiary amine end-capping having autocatalytic function and no carbonate, urethane or ester groups when the tertiary amine is a dialkylamino moiety,
(c) in the presence of a blowing agent,
(d) optionally in the presence of one or more polyurethane catalysts, with the proviso that no tin catalyst is used when the tertiary amine of polyol (b2) is a dialkylamino group in a position Beta to a terminal hydroxyl moiety, and
(e) optionally additives or auxiliary agents known per se for the production of a flexible polyurethane foam.
4. The process of claim 3 wherein the blowing agent is water in an amount from 0.5 to 10 parts by weight of component (b).
5. The process of claim 4 wherein the blowing agent further comprises carbon dioxide added either as a gas or as a liquid.
6. The process of claim 3 wherein a carboxylic or hydroxyl carboxylic acid is added to the reaction mixture.
7. The process of claim 3 wherein polyol (b2) is a polyol having a functionality of 2 to 8 and a hydroxyl number of 20 to 100 which is end-capped by reaction with a monoalkyl amine, a dialkyl amine, a cyclic amine or a polyamine wherein the alkyl group is a C1 to C3 alkyl group and the cyclic amine is a cycloaliphatic or aromatic amine containing 4 to 10 atoms in the ring.
8. The process of claim 7 wherein the polyol (b2) is formed by reaction of the polyol with dimethylamine, isopropylamine, 3-dimethylamino)-1-propylamine, imidazole, 2-methylimidazole, 1-(3-aminopropyl)-imidazole, 1-methyl piperazine or N,N-dimethyl aminopropylamine.
9. The process of claim 8 wherein the polyol (b2) if formed by reaction of the polyol with dimethylamine, 2-methylimidazole or imidazole.
10. The process of claim 7 wherein the polyol (b2) is formed by reaction of the polyol with an acrylate or methacrylate.
11. The process of claim 7 wherein the polyol (b2) is formed by reaction of the polyol with an aminoalkyl halide.
12. The process of claim 7 wherein the polyol (b2) is formed by reaction of the polyol with a glycicylamine.
13. The process of claim 7 wherein the polyol is a polyol containing a primary amine group and (b2) is formed by methylating at least a portion of the primary amine groups.
14. The process of any one of claims 7 to 13 wherein the polyisocyanate is a toluene diisocyanate.
15. The process of any one of claim 3 or 6 to 13 for the production of a foam containing an integral skin.
16. The process of any one of claims 3 to 14 wherein the polyisocyanate (a) contains at least one polyisocyanate that is a reaction product of an excess of polyisocyanate with polyol (b1), (b2) or a mixture thereof.
17. A polyol blend comprising
(i) from 5 to 99 percent by weight of at least one polyol compound having a nominal starter functionality of 2 to 8 and a hydroxyl number from 20 to 800, and
(ii) from 1 to 100 percent by weight of at least one polyol wherein the polyol has tertiary amine end-capping and contains no carbonate, urethane or ester groups when the tertiary amine is a dialkylamino moiety.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A window or door assembly comprising a frame member, and a leaf hingedly moveable relative to the frame member, the leaf having a rear edge which in the closed position of the leaf lies adjacent the frame member, the assembly further comprising stop means for acting between the frame member and said rear edge of the leaf for holding the leaf in an open position, said stop means being substantially concealed from view between the rear edge and the frame member when the leaf is in a closed position.
2. An assembly according to claim 1, wherein the stop means comprises a releasably engageable member.
3. An assembly according to claim 2, wherein the releasbly engageable member is releasable by controlling a supply of electrical or hydraulic power thereto.
4. An assembly according to claim 3, wherein the releasably engageable member automatically releases when the supply of electrical or hydraulic power is cut or substantially reduced.
5. An assembly according to any of claims 2 to 4, wherein the stop means comprises a first member on the leaf inter-engageable with a second member on the frame member.
6. An assembly according to any of claims 2 to 5, wherein the stop means comprises a member separable from a counterpart member to release the stop means.
7. An assembly according to any preceding claim, wherein the stop means comprises means for preventing the leaf from opening beyond a predetermined open position.
8. An assembly according to any preceding claim, wherein the stop means comprises a hook on one of the leaf and the frame.
9. An assembly according to claim 8, wherein the stop means further comprises a member on the other of the leaf and fame member for co-operating with the hook.
10. An assembly according to claim 8 or 9, wherein the hook is on the leaf.
11. An assembly according to any preceding claim, wherein the stop means further comprises dead-bolt means for preventing the leaf from being lifted laterally away from the frame member when the leaf is in a closed position.
12. An assembly according to claim 11, wherein the dead-bolt means comprises a spigot and an aperture in which the spigot is received, in use, when the door is in the closed position.
13. An assembly according to claim 12, wherein the spigot comprises a hook engaging slot.
14. An assembly according to claim 12, wherein the spigot is retractable.
15. An assembly according to any preceding claim, further comprising hinge means hingedly coupling the leaf to the frame member.
16. An assembly according to claim 15, where the hinge means comprises butt hinge means.
17. Stop means for use in an assembly as claimed in any preceding claim.
18. Stop means according to claim 17, wherein the stop means comprises first means for attachment to a said rear edge of a door or window, and a second means for attachment to a said frame member.
19. Stop means according to claim 18, wherein the first and second means are inter-engageable separate units.
20. A release control system for remotely opting at least one releasably engageable member constructed according to any one of claims 3 to 16.
21. A release control system according to claim 20 operable to release at least one said releasably engageable member in response to receiving a signal from a fire alarm system.
22. A release control system according to claim 20 or 21 operable to release at least one said releasably engageable member in the event that a power supply unit fails.
23. A release control system according to any one of claims 20 to 22 further comprising a programmable release unit, wherein said programmable release unit is operable to cause the release of individual or groups of said at least one releasably engageable member in response to user andor automatic input signals.
24. A window or door assembly, or a stop means for a window or door assembly, being substantially as hereinbefore described with reference to any of FIGS. 1 to 8 of the accompanying drawings.