Water dispersible/redispersible hydrophobic polyester resins and their application in coatings
AssigneeSeydel Companies, Inc.
InventorRobert Keith Salsman
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Abstract
This invention relates to the synthesis from PET (virgin, recycled, post consumer, or precursor raw materials) of novel water dispersible or water emulsifiable polyester resins having improved hydrophobicity or non-polar characteristics. These characteristics give the applied film of these dispersions or emulsions much improved water repellency while at the same time retaining their redispersible or reemulsifiable properties. Such resins can be used for many applications in the paper, textile, coatings, paint, construction, and other industries.
Claims21
An article of manufacture comprising a substrate coated with a water dispersible and hydrophobic polyester coating composition comprising a reaction product of 30-70% by weight of a terephthalate polymer;
- 5-40% by weight of a hydroxy functional compound having at least two hydroxyl groups;
- 1-20% by weight of a carboxy functional compound having at least two carboxyl groups and 10-60% by weight of a hydrophobic compound selected from the group consisting of C.sub.6 -C.sub.24 straight chain or branched fatty acid or triglycerides thereof.
An article of manufacture comprising a substrate coated with a water dispersible and hydrophobic polyester coating composition comprising a reaction product of 40-60% by weight of polyethylene terephthalate polymer;
- 1-10% by weight of neopentylglycol;
- 5-10% pentaerythritol;
- 3 to 15% by weight of trimellitic acid or trimellitic anhydride;
- and 10-45% by weight of stearic acid.
A method for imparting water repellency to substrates selected from the group consisting of fibrous substrates and leather comprising applying to such substrates a composition comprising the reaction product of 30-70% by weight of a terephthalate polymer;
- 5-40% by weight of a hydroxy functional compound having at least two hydroxyl groups;
- 1-20% by weight of a carboxy functional compound having at least two carboxyl groups and 10-60% by weight of a hydrophobic compound selected from the group consisting of C.sub.6 -C.sub.24 straight chain or branched fatty acid or triglycerides thereof.
Dependencies are inferred from the claim text.