公开(公告)号：WO1993006141A1

公开(公告)日：1993-04-01

申请号：PCT/US1992007404

申请日：1992-09-01

Applicant: PATEL, Naresh, D. ,  BROWN, Mark, W.

IPC: C08F120/10

CPC classification number: B65D81/32 ,  C09J4/00 ,  C08F220/00

Abstract: A method and apparatus for storing and preparing a two component reactive acrylic adhesive in which a liquid acrylic resin (12) mixed with an organic peroxide (16) in solution without causing yellowing. A sealed container (14) is used to house the peroxide (16) solution and an inert gas, preferably nitrogen (18). The container (14) is made from a translucent or transparent material to permit viewing during the mixing operation and is covered with an opague material (20) during storage of the peroxide solution (16) and gas (18).

公开(公告)号：WO1993016130A1

公开(公告)日：1993-08-19

申请号：PCT/US1993001884

申请日：1993-02-17

Applicant: PATEL, Naresh, D. ,  BROWN, Mark, W.

IPC: C08J09/32

CPC classification number: C09J155/02 ,  C08J3/091 ,  C08J3/095 ,  C08K7/26 ,  C08L2666/54 ,  C09J127/06 ,  C09J127/24 ,  C09J133/06

Abstract: A PVC adhesive for joining PVC pipes comprises: (a) about 10 to 22 wt % PVC resin and about 2 to 25 wt % acrylic resin, the total of the PVC resin and acrylic resin ranging from about 18 to 35 wt % of said adhesive; (b) a high vapor pressure solvent comprising about 10 to 50 wt % tetrahydrofuran and 0 to about 40 wt % methyl ethyl ketone, with the total high vapor pressure solvent concentration not exceeding a maximum concentration of about 55 wt % of the total adhesive composition; and a low vapor pressure solvent comprising about 10 to 35 wt % cyclohexanone and 0 to about 35 wt % N-methyl pyrrolidone, with the total low vapor pressure solvent concentration at least about 19 wt % of the total adhesive composition. The VOC (volatile organic compound) level of the PVC adhesive composition of the invention is at or below the allowed maximum value of 450 g/l, yet the adhesive meets or exceeds required performance standards, such as lap shear strength.