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US 5,932,665 AGranted
Polycarboxy polymer acid binders having reduced cure temperatures
AssigneeJohns Manville International, Inc.
InventorsCraig Donald DePorter, Thomas John Taylor
Life of this patent
Estimating the term…
Abstract
By carefully adjusting the molecular weight and amounts of methacrylic acid and maleic acid and/or maleic anhydride comonomers in polyacrylic acid-based fiberglass binders, binder-treated fiberglass cured and B-staged product throughput may be maintained at production rates designed for phenol/formaldehyde binders due to the lower thermal requirements for cure as compared to homopolyacrylic acid-based binder systems.
Claims7
A process for increasing the throughput of a polyacrylic acid-based binder-treated fiberglass cured or B-staged product, comprising:
- selecting as a binder a modified polyacrylic acid-based binder having moieties derived from acrylic acid and maleic acid and an apparent number average molecular weight of less than 60,000 Da, such that the onset of cure measured by DMA at a temperature ramp of 4.degree. C./min. is below about 155.degree. C. and the terminus of cure measured under the same conditions is less than about 200.degree. C.
Dependencies are inferred from the claim text.