| 摘要 |
A foam composition comprising: at least one polyol; at least one isocyanate; and first and second catalysts, where the second catalyst accelerates a reaction between a polyol and an isocyante at a rate slower than the first catalyst. The second catalyst is preferably an organic delayed action catalyst. The first catalyst may comprise: a normal gelling catalyst, preferably triethylenediamine; and a normal blowing catalyst, preferably bis(2-dimethylaminoethyl)ether. The second catalyst may comprise: a delayed action gelling catalyst formed by reaction of the normal gelling catalyst and formic or lactic acid; and a delayed action blowing catalyst formed by reaction of the normal blowing catalyst and formic or lactic acid. A method of preparing a foam composition comprises adding each of a polyol, an isocyanate, and first and second catalysts. A method of manufacturing a fabric laminated foam pad comprises: contacting a fabric with a first mould; providing the foam composition to a second mould; bringing the first and second mould together; curing the foam composition; and removing the foam article. The foam article may be used in a breast covering garment, particularly a bra. |
