Starch-plastic composite resins and profiles made by extrusion
AssigneeMgpi Processing, Inc.
InventorsLi Nie, Sukh D. Bassi, Clodualdo C. Maningat, Michael Douglas Parker
Life of this patent
Estimating the term…
Abstract
Composite materials containing non-plasticized, non-gelatinized starch, a compatibilizer and a synthetic resin, such as polyethylene and/or polypropylene, may be used to make wood replacement products for use as construction materials.
Claims54
A composition for producing a manufactured product for use as a wood substitute, comprising:
- from 35-80% by weight starch, wherein said starch has a moisture content of 2-5% and is not plasticized;
- from 0.5-4% by weight of a compatibilizer synthesized by reacting a polymer with a grafting compound;
- and
- from 20 to about 65% by weight of a synthetic resin.
A composition for producing a manufactured product for use as a wood substitute, comprising:
- from 35-80% by weight starch, wherein said starch has a moisture content of 2-5% and is not plasticized;
- from 20 to about 46% by weight of a synthetic resin;
- from 0.5-4% by weight of a compatibilizer synthesized by reacting a polymer with a grafting compound;
- from 5-15% by weight of a fiber;
- from 0.5-4% by weight of a lubricant, said lubricant containing no metal ions;
- from 2% or less by weight of a foaming agent;
- from 1% or less by weight of a colorant;
- from 2-5% by weight talc;
- from 2% or less by weight of an antimicrobial agent;
- and
- from 0.3% or less by weight of a UV stabilizer.
A composition for producing a manufactured product for use as a wood substitute, comprising:
- from 35-80% by weight starch, wherein said starch has a moisture content of 2-5% and is not plasticized;
- from 35 to about 60% by weight of a synthetic resin;
- from 0.5-4% by weight of a compatibilizer synthesized by reacting a polymer with a grafting compound;
- and
- from 5-15% by weight of a fiber.
A composition for producing a manufactured product for use as a wood substitute, comprising:
- from 45-55% by weight starch that is not plasticized, wherein said starch has a moisture content of 2-5%;
- from 0.5-4% by weight of a compatibilizer synthesized by reacting a polymer with a grafting compound;
- and
- a synthetic resin.
A manufactured product for use as a wood substitute, comprising:
- 90-100% by weight composite resin;
- 4% or less by weight lubricants;
- 15% or less by weight fibers;
- and
- 1% or less by weight pigments;
- wherein said composite resin comprises
- 35-80% by weight native starch that is not plasticized, wherein said starch has a moisture content of 2-5%,
- 20 to about 65% by weight polymer with a melt index of 0.25-15 grams/10 min.,
- 0.5-4% by weight maleated polymer with a melt index of 2-150 grams/10 min., and
- 15% or less by weight fibers.
Dependencies are inferred from the claim text.