Delayed co-initiation process for preparing polyol blends
申请人:BASF Corporation
公开号:EP0114072A2
公开(公告)日:1984-07-25
A delayed co-initiation process for preparing polyol blends comprising
(a) epoxidizing a first initiator compound to obtain a polyol with a predetermined equivalent weight; and
(b) adding a second initiator which may be the same as or different from the first and epoxidizing to obtain a polyol with a predetermined equivalent weight based upon the second initiator.
The resultant polyols are used in the preparation of polyurethane foams.
Flexible polyurethane foams having high indentation load deflection prepared from polyol blends
申请人:BASF WYANDOTTE CORPORATION
公开号:EP0116309A1
公开(公告)日:1984-08-22
This invention relates to polyol blends which comprise specific polyoxyalkylene triols and specific polyoxyalkylene diols. It also relates to a process for preparing flexible polyurethane foams with the polyol blends, and the resultant foams prepared by the process.
The flexible polyurethane foams are used as furniture cushioning, mattress cores, mattress toppers, carpet underlay, packaging, sponges, toys, athletic padding, and other uses.
An object is to provide a transfer sheet offers a single-sheet solution for achieving both normal temperature transfer and thermal transfer when transferring a material having high adhesion to polyester or other material constituting the backing. A means for achieving the above is a transfer sheet which has a structure in which a polyester layer as a backing layer, a polyvinyl alcohol (PVA) layer, and a transfer layer, are stacked in this order, where the polyvinyl alcohol layer contains a diol compound and/or triol compound whose adjacent hydroxyl groups are positioned at δ or farther positions with respect to each other, and which satisfies the condition in (i) below: (i) the T-peel strength at a peel rate of 100 mm/min between the polyester layer and the polyvinyl alcohol layer before a transfer layer is formed but after the humidity has been adjusted in an environment of 23°C, 50% RH, is 30 mN/20 mm or greater.
Proximity Effects. IV. Reaction of Cycloöctene Dibromide with Silver Acetate<sup>1</sup>
作者:Arthur C. Cope、Geoffrey W. Wood
DOI:10.1021/ja01571a070
日期:1957.7
Synthesis of Glycerol Homologues
作者:Mark Trudell、Kiran Thota
DOI:10.1055/s-0033-1339185
日期:——
A series of monoprotected glycerol homologues and triols were prepared in high overall yields (>90%) via the hydroboration-oxidation of the corresponding dienols. Hydroboration with disiamylborane and concomitant alkaline oxidation (NaOH, H2O2) was found to be a mild, high-yielding, and highly efficient method for the construction of a variety of glycerol homologues.