| 摘要 |
1. A method of making a papermaking additive composition comprising cooking a starch slurry, having a dry substance from about 3 to about 8% by weight, characterized in that the cooking process is conducted under controlled temperature conditions from about 55 to about 95 degree C during a period of time ranging from 5 min to more than 1 hour to obtain a cooked swollen volume from about 1.6 ml./gram to about 100 ml./gram and cooked solubles from about 0.5% to about 50% by weight, so that said suspension of swollen starch remain s substantially two phase. 2. A method of claim 1, characterized in that the cooking is conducted in a continuous process at a pH from about 5 to about 8. 3. A method of claim 2, characterized in that the dry substance in starch-containing suspension is from about 3% to about 10% by weight. 4. A method of claim 1, characterized in that the cooking is conducted in a batch process with continuous agitation, the dry substance is from about 3 to about 8% and the pH is from about 5 to about 8. 5. A method of sizing paper comprising adding to the finish in a papermaking process at a point after the refining step a swollen starch additive composition, characterized in that an additive of claims 3-5 is used in papermaking process. 6. A method of claim 4, characterized in that the Ph of the finish is from about 4 to about 9. |
