Class / Patent application number | Description | Number of patent applications / Date published |
530501000 | Aldehyde, ketone or ozone reacted with a lignin or lignin containing substance, or product thereof | 6 |
20100331531 | METHODS FOR ESTERIFYING LIGNOCELLULOSIC MATERIAL - Methods of making esterified lignocellulosic materials and resulting compositions and articles are disclosed. | 12-30-2010 |
20110124847 | METHOD FOR PREPARING CONCRETE WATER REDUCER BY GRAFTING OF LIGNOSULFONATE WITH CARBONYL ALIPHATICS - The present invention disclosed a concrete water reducer by grafting of lignosulfonate with carbonyl aliphatics and its preparation method. A technical solution of the method is as follows: compound proportioning of the concrete water reducer (weight) is: carbonyl group aliphatics:lignosulfonate=1:(0.75-1). The said concrete water reducer by grafting of lignosulfonate with carbonyl aliphatics is prepared through following process steps: controlling the temperature of aliphatics water reducer at 95-100° C.; dropping lignosulfonate into said aliphatics water reducer; conducting graft copolymerization reaction at 95° C.-100° C. for 2-5 h and obtaining lignosulfonate modified and grafted aliphatics concrete water reducer. The method of present application is simple, low cost and friendly to environment. The water reducer has good water reducing effect and can reduce colour aberration of concrete and thus be applied broadly. | 05-26-2011 |
20130096285 | HIGHLY EFFICIENT LIGNIN-BASED WATER-REDUCING AGENT WITH HIGH DEGREE OF SULFONATION AND HIGH MOLECULAR WEIGHT, AND PREPARATION METHOD THEREOF - This invention discloses a high-performance lignin-based water reducer with high degree of sulfonation and high molecular weight and its preparation method. This water reducer exhibits an excellent water-reducing performance, its water-reducing rate of this lignin-based water reducer reaches 25% at a dosage of 0.70 wt %, which is higher than that of the naphthalene-based water reducer and the sulfonated lignin water reducer prepared by oxidation and sulfonation of alkali lignin, and 28-days compressive strength ratio of the concrete with this water reducer to the concrete without this water reducer is up to 150:100. Furthermore, the water reducer of present invention will not be crystallized in winter, and the concrete iron won't be corroded. The water reducer of the present invention makes the concretes having a low bleeding rate, excellent properties of workability, anti-freeze and anti-carbonization. | 04-18-2013 |
20130237694 | LIGNIN-BASED CONCRETE ADMIXTURES - Methods for converting waste streams from the wood pulping industry to high-value concrete admixtures are described. For example, isolated lignin and lingnosulfonate or waste streams containing lignin and lingnosulfonate can be directly converted to the concrete admixtures, or they may be first converted to their methylol derivatives and treated with further reagents to produce the concrete admixtures. | 09-12-2013 |
20130253177 | FRICTION MATERIAL - A friction material containing, as a binder, a lignin-phenol resin having a weight average molecular weight of 5,000 or less or a cardanol-modified lignin-phenol resin having a weight average molecular weight of 5,000 or less. The friction material is produced by a method including: reacting a lignin having a weight average molecular weight of 5,000 or less, a phenol, an aldehyde, and optionally a cardanol, in the presence of an acid catalyst. | 09-26-2013 |
20150094458 | HIGHLY EFFICIENT LIGNIN-BASED WATER-REDUCING AGENT WITH HIGH DEGREE OF SULFONATION AND HIGH MOLECULAR WEIGHT, AND PREPARATION METHOD THEREOF - This invention discloses a high-performance lignin-based water reducer with high degree of sulfonation and high molecular weight and its preparation method. This water reducer exhibits an excellent water-reducing performance, its water-reducing rate of this lignin-based water reducer reaches 25% at a dosage of 0.70 wt %, which is higher than that of the naphthalene-based water reducer and the sulfonated lignin water reducer prepared by oxidation and sulfonation of alkali lignin, and 28-days compressive strength ratio of the concrete with this water reducer to the concrete without this water reducer is up to 150:100. Furthermore, the water reducer of present invention will not be crystallized in winter, and the concrete iron won't be corroded. The water reducer of the present invention makes the concretes having a low bleeding rate, excellent properties of workability, anti-freeze and anti-carbonization. | 04-02-2015 |