Phenol-terminated polyurethane or polyurea(urethane) with epoxy

Details Phenol-terminated polyurethane or polyurea(urethane) with epoxy Phenol-terminated polyurethane or polyurea(urethane) with epoxy

1992-01-21

1994-01-11

Sellers, Robert E.

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

Synthetic resins

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

525 65, 525 66, 525 68, 525 92, 525 93, 525 94, 525107, 525109, 525127, 525128, 525129, 525130, 525131, 525146, 525147, 525148, 525150, 525151, 525423, 525424, 525426, 525438, 525439, 525440, 525445, 525450, 525453, 525528, C08L 902, C08L 6302, C08L 7502, C08L 7508

Patent

active

052782573

ABSTRACT:
Compositions containing A) a copolymer based on at least one 1,3-diene and at least one polar, ethylenically unsaturated comonomer and B) a phenol-terminated polyurethane, polyurea or polyurea-urethane of the formula I ##STR1## in which m is 1 or 2, n is 2 to 6, R.sup.1 is the n-valent radical of an elastomeric prepolymer which is soluble or dispersible in epoxide resins, X and Y independently of one another are --O-- or --NR.sup.3 --, it being necessary for one of these groups to be --NR.sup.3 --, R.sup.2 is an m+1-valent radical of a polyphenol or aminophenol after the removal of the phenolic hydroxy group(s) or the amino group or both the amino group and the phenolic hydroxyl group, respectively, and R.sup.3 is hydrogen, C.sub.1 -C.sub.6 alkyl or phenyl, are described.
Compounds containing the components A) and B) as well as an epoxide resin C) are also described.
The cured products are distinguished by a high peel strength and high resistance to crack propagation. The curable compositions can be employed, for example, as structural adhesives.

REFERENCES:
patent: 3855177 (1974-12-01), Sandra, Jr.
patent: 4390679 (1983-06-01), Weiss et al.
patent: 4683283 (1987-07-01), Goel

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