Coating composition and process comprising calcium sulfoaluminate pigment,a rubbery latex binder and a copolymer of styrene and maleic monomer
Abstract
Abstract ONE OR MORE OF THE PROBLEMS ASSOCIATED WITH THE PREPARATION OF A WATER-BASED COATING COMPOSITION OF A MIXUTRE OF A CALCIUM SULFOALUMINATE PIGMENT, A FIRST BINDER OF WATER-SOLUBILIZED PROTEIN AND/OR POLYSACCHARIDES, AND A SECOND BINDER BEING A RUBBERY POLYMER LATEX, IS OVERCOME BY A PROCESS IN WHICH THE FIRST BINDER MATERIAL IS ELIMINATED. THE IMPROVED PROCESS USES THE SECOND BINDER MATERIAL AS THE SOLE BINDER AND THIS IS ACCOMPLISHED BY FURTHER INCLUDING IN THE MIXTURE FROM 0.5 TO 5% BY WEIGHT (BASED ON THE WEIGHT OF CALCIUM SULFOALUMINATE) OF A WATER-SOLUBILIZED COPOLYMER OF A STYRENE MONOMER WITH A MALEIC MONOMER IN THE RATIO OF 1:3 TO 3:1 AND HAVING AN AVERAGE MOLECULAR WEIGHT OF 1000-20,000. THE IMPROVEMENT IS ESPECIALLY APPLICABLE TO THE PAPER COATING PROCESS.
Inventors
- 👤 Donald Graham Hobbs
Bibliographic Details
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |