Production method for water-absorbing resin composition
US8703859B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2007 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Oct 8, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J3/203
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention provides a method for being capable of sufficiently exerting property improvement effect by the addition of additive particles other than water-absorbing resin to water-absorbing resin particles. The problems can be solved by using additive particles having over cohesive particles in an amount equal to or less than a predetermined amount, or by using the additive particles by crushing or classifying in advance, before mixing with water-absorbing resin particles. Alternatively, the problem can be solved by subjecting a mixture of the water-absorbing resin particles and the additive particles to pneumatic transportation processing, in particular, in a heated state, after mixing or at the same time as mixing. Further, the present invention provides a water-absorbing resin composition, which is capable of stably exerting high-level property. The problems can be solved by a water-absorbing resin composition, where the addition amount of additive particles and amount of free additive particles satisfies a predetermined relation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.