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US 9,644,322 B2Granted
Solid articles from poly alpha-1,3-glucan and wood pulp
AssigneeE. I. Du Pont de Nemours and Company
InventorDebora Flanagan Massouda
Life of this patent
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Abstract
A solid article formed from poly alpha-1,3-glucan and wood pulp is disclosed as are methods for making the solid article. The articles are not water sensitive and are useful for producing strong molded articles from wood pulp.
Claims6
A solid article comprising:
- (a) from 50 to 90% by wt. poly alpha-1,3-glucan;
- and
- (b) from 10 to 50% by wt. wood pulp.
A process for making a solid article comprising:
- (a) preparing a poly alpha-1,3-glucan wet cake comprising;
- (i) heating an enzyme reaction solution comprising an aqueous basic buffered solution of S. salivarius gtfJ enzyme, sucrose and, optionally, antimicrobial agent to make a slurry containing poly alpha-1,3-glucan;
- (ii) filtering the slurry to isolate the poly alpha-1,3-glucan in the form of a wet cake;
- and
- (iii) washing the wet cake with water;
- (b) preparing a mixture from the wet cake with wood pulp, water and, optionally, plasticizers, tougheners and/or fibrillar strengthening agents;
- (c) homogenizing the mixture;
- (d) removing some water to form a flowable or malleable material;
- (e) forming the flowable or malleable material into a shape;
- and
- (f) drying the shape to form a solid article.
8 more elements
Dependencies are inferred from the claim text.