Use of amino resins to improve properties of oxymethylene polyme

Details Use of amino resins to improve properties of oxymethylene polyme Use of amino resins to improve properties of oxymethylene polyme

1985-10-24

1987-08-25

Pertilla, Theodore E.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525399, C08L 6102

Patent

active

046893733

ABSTRACT:
Mechanical properties, especially tensile and impact properties, of molding compositions comprising at least one thermoplastic oxymethylene polymer and optionally also containing an impact-enhancing amount of a polyurethane, can be improved by incorporating into the molding composition an effective amount greater than 10 weight percent of the composition of a monomeric formaldehyde/amino compound condensation product or prepolymeric amino resin selected from condensation products of formaldehyde and at least one of guanidine, urea, a substituted or unsubstituted guanamine and melamine, preferably having a degree of polymerization of about 2-5. An acid catalyst can be employed to promote the cross-linking reactions of the prepolymeric amino resin. In the compositions comprising polyurethane, amounts of the amino resin of less than 10 weight percent can be used.

REFERENCES:
patent: 4386178 (1983-05-01), Schuette et al.

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