E.i. Dupont De Nemours and Company

Randal D King

Charles J Brandenburg

Leo E Manzer

Edmund Arthur Flexman

Peter William Uhlianuk

David M Dean

George Henry Hofmann

Rutger D Puts

Larry G Oien

Polymers containing &#x3b1;-methylenelact(ones)(ams) such as &#x3b1;-methylenebutyrolactones are useful in blends with other polymers. For examples such polymers which have reactive groups are toughened by mixing with a rubbery material which has complimentary reactive groups, or polymers containing repeat units derived from &#x3b1;-methylenelact(ones)(ams) are toughened by mixing with polymeric core-shell particles having an elastomeric core and a specified thermoplastic shell. The properties of thermoplastics are also improved by blending with &#x3b1;-methylenelact(ones)(ams) such as &#x3b1;-methylenebutyrolactones containing (co)polymers.

Blends of poly[&#x3b1;-methylenelact(one)(am)] homo-and copolymers

This invention is directed to a coating composition used for original equipment manufacturing or refinishing uses in the automotive industry, which coating composition utilizes an acrylic polymer which contains substituted or unsubstituted exomethylene lactones or lactams as a comonomer.

Coating compositions containing substituted and unsubstituted exomethylene lactone or lactam monomers

This invention pertains to a process for making &agr;-methylenelactones and &agr;-substituted hydrocarbylidene lactones. The present invention obtains high yields of &agr;-methylene-&ggr;-butyrolactone by heating &ggr;-butyrolactone and formaldehyde in the presence of a base.

Process for the preparation of &agr;-methylenelactones and &agr;-substituted hydrocarbylidene lactones

Growing community of inventors

Kennett Square, PA, United States of America

Randal D King