Process for producing molded articles from polylauryllactam acti

Details Process for producing molded articles from polylauryllactam acti Process for producing molded articles from polylauryllactam acti

1977-06-29

1980-11-11

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

526 64, 526 65, 526 67, 528312, 528315, C08G 6918

Patent

active

042334330

ABSTRACT:
Molded articles of polymerized lactams are prepared by pumping of a catalyst containing partial lactam melt at a temperature of .+-. 1.degree. C. of a temperature in the range of 160.degree. C. to 170.degree. C. and a lower temperature activator containing partial lactam melt at a temperature of .+-. 1.degree. C. of a temperature in the range of 160.degree. C. to 170.degree. C. to which activator addition is delayed relative to catalyst addition, with separate gear pumps to a mixing zone maintained between 170 and 175.degree. C., the pumps connected to the mixing zone by straight feed tubes positioned at an angle of inclination to the horizontal of a maximum of 10.degree., each feed tube having a volume of at least one-third greater than the pump to which it is connected and form the mixing zone into a mold. At least part of the gases released are returned to themixing zone by the tube systems and gear pumps. Apparatus to carry out the method is also provided.

REFERENCES:
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patent: 3121768 (1964-02-01), Boyer
patent: 3216976 (1965-11-01), Schwartz et al.
patent: 3451975 (1969-06-01), Gaspar et al.
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patent: 3525719 (1970-08-01), Schwarz
patent: 3793255 (1974-02-01), Handtmann
patent: 3799912 (1974-03-01), Hebert
patent: 3823105 (1974-07-01), Morival et al.
patent: 3883608 (1975-05-01), Hebert
patent: 3917549 (1975-11-01), Morival et al.

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