Reinforcement of paper pulp-based materials using a reactive alkyd oligomer capable of forming a reprocessable reinforcement resin in situ
OwnerIsao Noda, Shrish Yashwant Rane +1inventors
InventorsIsao Noda, Shrish Yashwant Rane, William Maxwell Allen
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Abstract
Disclosed herein are paper pulp-based materials that are reinforced with reprocessable alkyd resins, which are formed in situ with the materials. Also disclosed herein are methods for coating paper pulp-based materials with alkyd resins, and methods of recycling alkyd resin coated paper pulp-based materials.
Claims20
A product comprising a paper pulp-based article and a reprocessable alkyd resin, wherein the alkyd resin is formed in situ with the article and coats the article in an amount, on a dry weight basis, of about 1 gram per square meter of the article (g/m2) to about 20 g/m2, and wherein the product has a burst strength determined by TAPPI T810 that is at least 5% greater than that of the article.
A method comprising:
- (a) coating a paper pulp-based article with a prepolymer liquid comprising alkyd oligomers, polyols, excipients, or mixtures thereof in an amount of about 1 gram of the prepolymer liquid per square meter of the article (g/m2) to about 30 g/m2;
- and,
- (b) curing the prepolymer liquid.
A product comprising a paper pulp-based article and an alkyd resin, the product made by a process comprising:
- (a) coating the paper pulp-based article with a prepolymer liquid comprising alkyd oligomers, polyols, excipients, or mixtures thereof in an amount of about 1 gram of the prepolymer liquid per square meter of the article (g/m2) to about 30 g/m2;
- and,
- (b) curing the prepolymer liquid.
A pulp-manufacturing method comprising:
- (a) adding water and acid or base, in the absence of non-aqueous solvents, to a product comprising a paper pulp-based article and a reprocessable alkyd resin, wherein the alkyd resin is formed in situ with the article and coats the article in an amount, on a dry weight basis, of about 1 gram per square meter of the article (g/m2)to about 20 g/m2, and wherein the product has a burst strength determined by TAPPI T810 that is at least 5% greater than that of the article to form a mixture;
- and,
- (b) heating the mixture to a temperature of about 5020 C. to about 120° C. for a period of at least about 3 minutes.
Dependencies are inferred from the claim text.